Nidec Leroy-somer flsn series Operating manual

Reference: 5724 en - 2020.02 / c

LSN - FLSN

Ex ec IIC T3 Gc

Commissioning and

maintenance guide

Three-phase asynchronous

motors for explosive gas

and dust atmospheres

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

GENERAL WARNING

These symbols appear in this document whenever it is important to take special precautions during installation, operation,

maintenance or servicing of the motors.

It is essential that electric motors are installed by experienced, qualied and authorized personnel.

In accordance with the main requirements of EC Directives, the safety of people, animals and property should be ensured when tting

the motors into machines.

Particular attention should be given to equipotential ground or earthing connections.

The noise levels of the machines, measured under standard conditions, complies with the requirements of the standard and does

not exceed the maximum value of 85 dB(A) pressure at 1 metre.

The following precautions must be taken before working on any stationary device:

• AC voltage disconnected and no residual voltage present

• Careful examination of the causes of the stoppage (jammed transmission - loss of phase

- cut-out due to thermal protection - lack of lubrication, etc.)

Electric motors are industrial products. They must therefore be installed by qualied, experienced and

authorized personnel. The safety of people, animals and property must be ensured when tting the motors into machines

(please refer to current standards).

Personnel likely to intervene on electrical installations and equipment in explosion risk areas shall be trained and authorized

specically for this type of equipment.

Indeed, knowledge is required about the risks specic to electricity, but also those due to chemical properties and physical

characteristics of the products used in the installation (gas, vapours, dusts), as well as the environment in which the equipment

operates. These elements condition the risks of re and explosion.

More particularly, he/she must be informed and aware of the reasons for particular safety instructions in order to observe them. For

example:

- never open when live,

- do not open when live if a dusty explosive atmosphere is present,

- do not repair in live conditions,

- do not manoeuvre under load,

- wait a few minutes before opening,

- ret the gaskets to guarantee sealing.

Before commissioning, check that the information shown on the nameplate is compatible with the explosive

atmosphere that is present and with the zone where used.

NOTE:

NIDEC LEROY-SOMER reserves the right to modify the characteristics of its products at any time in order to incorporate the latest

technological developments. The information contained in this document is therefore liable to be changed without notice.

This document is the property of Nidec Leroy-Somer.

It may not be reproduced in any form without prior authorization.

All brands and models have been registered and patents applied for.

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

Dear Customer,

You have just acquired a NIDEC LEROY-SOMER safety motor.

These motors benet from the experience of one of the largest manufacturers in the world, using state-of-the-art technologies –

automation, specially selected materials and rigorous quality control. As a result, the regulatory authorities have awarded our motor

factories ISO 9001, Edition 2015 international certication.

We thank you for making this choice, and would ask you to read the contents of this manual.

By observing a few essential rules, you will ensure problem-free operation for many years.

NIDEC LEROY-SOMER

EU DECLARATION OF CONFORMITY OF USE AND OF INTEGRATION

(document subject to changes)

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

PS6 : DOCUMENT MANAGEMENT

Classement / File : S4T005

EU DECLARATION OF CONFORMITY AND INCORPORATION

Révision : E

Date : 2019/09/25

Page : 1 /1

QUALITY

MANAGEMENT

Annule et remplace / Cancels and replaces

Ddu / from 2017/12/15

Doc type : S6T002 Rev B du/from 26/11/2014

☐

I

We, MOTEURS LEROY SOMER, Bd - Marcellin LEROY 16915 Angoulême cedex 9 France, declare, under our

own responsibility, that the following products :

LSNand FLSN series type "Ex ec" increased safety induction motors

bearing the following markings on their nameplates:

CE II 3G Ex ec IIC T3 (or T4) Gc (zone 2)

or CE II 3GD Ex ec IIC T3 (or T4) Gc Ex tc IIIC T125°C Dc (zone 2 and 22)

IIC motors can be marked IIA or IIB for commercial reasons.

Comply with :

European Directives:

• Low Voltage Directive 2014/35/EU

•ROHS 2 Directive 2011/65/UE

• Electromagnetic Compatibility Directive 2014/30/EU

• ATEX Directives: 2014/34/EU

European and international standards: EN 50581 :2012; 60034-1:2010; 60034-7:1993/A1:2001;

EN 60034-9:2005/A1:2007; 60034-14:2018; 60034-30-2:2016;

EN 62262 :2002;

IEC 60079-0:2011; EN 60079-0:2012/A11 :2013;

IEC 60079-7:2015; EN 60079-7:2015; IEC 60079-31:2013;

EN 60079-31:2014 (Ex tc)

This conformity permits the use of these ranges of products in machines subject to the application of the Machinery Directive

2006/42/EC, provided that they are integrated or incorporated and/or assembled in accordance with, amongst others, the regulations

of standard EN 60204(All parts) "Electrical Equipment for Machinery".

The products defined above may not be put into service until the machines in which they are incorporated have been declared as

complying with the applicable Directive.

Installation of these materials shall be done by a professional who is responsible to comply with the regulations, decrees, laws,

orders, directives, application circulars, standards, rules or any other document relating to the installation site. He will be also

responsible for the respect of values stamped on (motor) rating plate(s), instruction manual, installation instructions, maintenance

manuals and/or any other document supplied by the manufacturer. MOTEURS LEROY-SOMER accepts no liability in the event of

failure to comply with these rules and regulations.

Signature of plant quality manager : Signature of plant technical manager :

G.GARDAIS date: 2019 september the 25th B.VINCENT date: 2019 september the 25th

Consulter le système de gestion documentaire afin de vérifier la dernière version de ce document.

For the latest version of this document, please access the document management system.

Process: POC2 New product development control

No.

EU DECLARATION OF CONFORMITY AND OF INCORPORATION

FLSN and FLSES motors

Rev.: A of: 10/04/2019

Page: 1 / 1

Beaucourt

plant

Cancels and replaces:

Doc type: Q06T002 Rev F of 19/02/2018

We, Constructions Electriques de Beaucourt (CEB),14, Rue de Dampierre, 90500 BEAUCOURT, France, (a company of the Nidec / Leroy-Somer

Holding SA group, boulevard Marcellin Leroy, CS 10015, 16915 ANGOULEME cedex 9, France) declare, under our sole responsibility that the

following products:

Bearing the following marking(s) on their nameplates:

comply with the following European Directives:

Low voltage:

RoHS 2:

Electromagnetic Compatibility:

ErP:

Atex:

European standards:

International standards:

and with the types awarded:

- type examination certificate:

- certificate of conformity:

issued by the Notified Body:

2014/35/EU

2011/65/EU

2014/30/EU

2009/125/EC and its (EC) implementation regulation:

640/2009 and amendments (for the products concerned)

2014/34/EU

EN 50581:2012

EN 60034

-1:2010; 60034-7:1993/A1:2001; 60034-9:2005/A1: 2007;

60034

-14:2018; 60072-1:1991; 62262:2004

EN 60079

-0: 2012/A11:2013; 60079-7:2015; 60079-31:2014; 60529: 2014;

62262:2004

IEC 50581:2013

IEC 60034

-1:2017; 60034-7:1993/A1:2001; 60034-9:2005/A1:2007;

60034

-14:2004/A1:2007; 60072-1:1991; 62262:2002

IEC 60079

-0:2011/A11:2013; 60079-7:2015; 60079-31:2013; 60529: 2015

INERIS 18ATEX3011 X

IECEx INE 19.0015X

INERIS (0080)

–BP2 –Parc technologique ALATA

60550 VERNEUIL-EN-HALATTE

This compliance permits the use of these ranges of products in a machine subject to the application of the machinery directive 2006/42/EC,

provided that they are integrated or incorporated and/or assembled in accordance with, amongst others, the rules of standard EN 60204 (all

sections) “Electrical Equipment of Machines”.

This equipment must be installed by a professional, liable for ensuring compliance with all installation rules, decrees, orders, laws, directives,

application memos, standards (IEC-EN 60079-14, etc.), regulations, good trade practices and any other document on the installation site. The

professional is also liable for ensuring compliance with the values indicated on the motor information plate(s), instruction manuals, installation and

maintenance manuals and any other document provided by the manufacturer.

Constructions Electriques de Beaucourt (CEB) cannot be held liable for non-compliance with all or part of the above.

Date and signature of the Technical Department

T. PERA

FLSN type induction motors (“ec” protection mode) and

FLSES type induction motors (“tc” protection mode)

CE II 3 G Ex ec IIC T3 Gc or (T4 Gc or T5 Gc or T6 Gc) for zone 2

or CE II 3 G Ex ec eb IIC T3 Gc or (T4 Gc or T5 Gc or T6 Gc) for zone 2 if “eb” junction box

or CE II 3 G Ex ec IIC T3 Gc or (T4 Gc or T5 Gc or T6 Gc)

+ II 3 D Ex tc IIIB T125°C Dc IP 55 or Ex tc IIIC T125°C Dc IP 65 (up to 200°C) for zone 2 and 22

or CE II 3 G Ex ec eb IIC T3 Gc or (T4 Gc or T5 Gc or T6 Gc)

+ II 3 D Ex tc IIIB T125°C Dc IP 55 or Ex tc IIIC T125°C Dc IP 65 (up to 200°C) for zone 2 and 22 if “eb” junction box

or CE II 3 D Ex tc IIIB T125°C Dc IP 55 or Ex tc IIIB T125°C Dc IP 65 (up to 200°C) for zone 22

18th july 2019

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

CONTENTS

1 - RECEPTION .................................................................. 5

1.1 - Identication and marking 5

2 - STORAGE .......................................................................6

3 - COMMISSIONING...........................................................6

3.1 - Protocol for lubrication during commissioning 6

3.2 - Checking the insulation.......................................................7

4 - INSTALLATION ............................................................. 7

4.1 - Position of the lifting rings ...................................................7

4.2 - Location - ventilation...........................................................8

4.3 - Preparation of the xing support .........................................9

4.4 - Coupling ............................................................................ 9

4.5 - Important information to be taken into consideration

during installation................................................................9

5 - ELECTRICAL PARAMETERS - LIMITING VALUES....10

5.1 - Limitation of disturbances caused by starting of motors...10

5.2 - Supply voltage..................................................................10

5.3 - Starting time .....................................................................10

5.4 - Supply with frequency inverter..........................................10

6 - USE ............................................................................... 11

7 - SPECIAL OPERATING CONDITIONS..........................12

7.1 - Variable speed use ..........................................................13

8 - ADJUSTMENT ..............................................................16

9 - MAINS CONNECTION ..................................................18

9.1 - Terminal box .....................................................................18

9.2 - Connection to the electrical supply ...................................18

9.3 - Terminal block or isolator connection wiring diagram ........19

9.4 - Direction of rotation...........................................................19

9.5 - Earth terminal and earthing...............................................19

9.6 - Connecting the power supply cables to the terminal block ..20

9.7 - Indication of cable gland size and type for 400V

rated supply voltage if drillings required without

details of hole diameters being given................................22

9.8 - Admissible number and maximum size of

holes for cable glands per “eb” terminal block...................23

9.9 - Recommended cable temperatures..................................23

10 - MAINTENANCE ..........................................................24

10.1 - General...........................................................................24

10.2 - Corrective maintenance: general....................................25

10.3 - Safety rules.....................................................................26

10.4 - Routine maintenance......................................................26

10.5 - Bearing housing maintenance ........................................27

10.6 - IP Leak tightness of motor ..............................................29

10.7 - Groups IIC & III paints.....................................................29

10.8 - Troubleshooting guide ....................................................30

10.9 - Preventative maintenance..............................................31

10.10 - Recycling......................................................................31

11 - LSN MOTORS REMOVAL AND REFITTING

PROCEDURE.....................................................................32

11.1 - LSN 80 to LSN 160MP/LR and FLSN 80 to 132 motors . 32

11.2 - LSN 160M/L, LSN 180MT/LR motors............................. 34

11.3 - LSN 180L, LSN 200, LSN 225ST/MT/MR,

LSN 250MZ motors........................................................ 36

11.4 - LSN 250ME, LSN 280SC/MC motors ............................ 38

11.5 - LSN 280SD/MD, LSN 315 motors...................................40

12 - LSN MOTORS REMOVAL AND REFITTING

PROCEDURE.....................................................................42

12.1 - FLSN 160 and 180 motors............................................. 42

12.2 - FLSN 200 to 225ST motors ........................................... 44

12.3 - FLSN 225 to 280 motors................................................ 46

12.4 - FLSN 315S to 355LD motors......................................... 48

12.5 - FLSN 355LK to 450 motors.............................................50

INDEX

Acceptance.......................................................................................5

Adjustments................................................................................... 16

Alarm - early warning ..................................................................... 11

Assembly......................................................................................... 6

Balancing......................................................................................... 9

Bearing housing xing rods or screws: tightening ...........................25

Bearing housings.................................................................... 26 - 27

Belts............................................................................................... 17

Built-in thermal protection ............................................................... 11

Cable gland.....................................................................................18

Cables ............................................................................................20

Capacitors ......................................................................................24

Connection to mains ............................................................... 18 - 20

Connection wiring diagrams............................................................19

Connection .....................................................................................20

Corrective maintenance..................................................................25

Coupling .......................................................................................... 9

Coupling sleeves ............................................................................16

Digistart ......................................................................................... 12

Direction of rotation.........................................................................19

Draining off condensation water......................................................26

Earth terminal .................................................................................19

Earth....................................................................................... 12 - 19

Europe Directives ....................................................................... 3 - 5

Fan ...................................................................................................8

Frequency inverter......................................................................... 13

Handling ................................................................................. 7 - 8 - 9

Heaters .......................................................................................... 11

Identication .................................................................................... 5

Inertia ywheel................................................................................16

Insulation ......................................................................................... 7

Lifting ring.........................................................................................7

Location........................................................................................... 8

Lubrication - Grease nipples .........................................6 - 24 - 25 - 26

Lubrication............................................................................... 25 - 26

Nameplate ........................................................................................5

Power supply ........................................................................... 10 - 20

Power ............................................................................................ 10

Protections...................................................................................... 11

Pulleys............................................................................................17

Routine maintenance..................................................................... 26

Spare parts .....................................................................................24

Starting ...........................................................................................10

Storage.............................................................................................6

Terminal box.................................................................................. 18

Terminal plate: tightening of nuts.....................................................20

Tolerances ......................................................................................16

Troubleshooting..............................................................................30

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

1 - RECEPTION

This manual or its condensed version is to be given to the end user. In the event of this notice not being translated into the language of the country in which

the motor is used, the distributor is responsible for its translation and for distributing it to end users.

Products to which this manual applies may not be commissioned before the machinery in which they are installed has been declared to conform to the Directives that apply

to it.

This equipment and its accessories or associated equipment must be installed by a professional, who is liable for ensuring compliance with all installation rules, decrees,

orders, laws, directives, application memos, standards (where explosive atmospheres are involved, standard IEC-EN 60079-14 as a minimum), regulations, good trade

practices and any other documents relating to the installation site. The professional is also liable for ensuring compliance with the values indicated on the motor information

plate(s), instruction manuals, installation and maintenance manuals and any other document provided by the manufacturer.

Constructions Electriques de Beaucourt (CEB) and NIDEC LEROY-SOMER cannot be held liable for non-compliance with all or part of the above or with any

part of this manual.

On receipt of your motor, check that it has not suffered any damage in transit.

If there are obvious signs of damage, contact the carrier (you may able to claim on their insurance) and after a visual check, turn the motor by hand to detect

any malfunction.

1.1 - Identication and marking

Check that the information shown on the nameplate is compatible with the explosive atmosphere that is present, the utilisation zone and the ambient and surface

temperatures.

Mains supply nameplate Variable speed nameplate Quadratic torque variable speed nameplate

Denition of symbols used on nameplates:

Legal mark of equipment compliance

with the requirements of European Directives.

Motor symbols:

MOT 3 ~ : Three-phase A.C. motor

FLSN : Motor type

280 : Frame size

M: Housing symbol

4 : 4 poles

B3 : Operating position

No. : Serial number

2017 : Year of manufacture

IM : Operating position symbol

°C : Maximum ambient temperature

Ins. cl. : Winding insulation class

S : Standard operating duty

% : Operating duty

d/h : Number of starts per hour

SF : Duty factor

kg : Weight

DE : Drive end bearing

NDE : Non drive end bearing

g: Quantity of grease to be added per bearing

at each re-lubrication (in g)

h: Interval in hours between re-lubrication

IP : Index of protection

IK : Impact resistance index

m: Maximum operating altitude

V: Supply voltage

Hz : Supply frequency

min-1 : Rated speed of rotation

kW : Rated power

A: Rated current

cos j: Power factor

% : Efciency at 4/4 load

D: Delta coupling

: Star coupling

POLYREX EM 103 : Grease part number for bearings

Insulated bearing : NDE : Insulated bearing NDE side

Manufactured by CEB : Equipment manufacturer

EAC Ex : Equipment for explosive atmospheres

certied for Eurasia

cURus : Insulation system class homologated

E068554 for USA and Canada

A : Vibration level code

H: Balancing mode code

NY : Starting requirements code

279 E : Plate reference

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

IE % : Efciency level and efciency,

at rated load and voltage

2/4 : Efciency at 2/4 load

3/4 : Efciency at 3/4 load

Inverter settings PWM : Characteristics for setting the PWM drive to allow temperature class of motor to be met

Motor performance valid for 400V - 50Hz at inverter input : Motor performance for a voltage of 400V - 50 Hz

at the drive input

Duty S9 : Performances given for S9 duty

Min.Fsw : Minimum switching frequency of the drive in kHz

Nmax : Admissible maximum motor speed in rpm

PTC 140°C : PTC sensor type - temperature limit = 140°C

IOL : Admissible over-current = 1.5 x rated current

tOL : Maximum period during which over-current can occur (in secs)

tcool : Minimum duration during which the motor must be at the max of its rated current between 2 over-current

events (in secs)

Quadratic torque : Type of torque: quadratic

IVIC : Pulse voltage insulation class code

Zone ATEX/IECEx

marking

Gas protection mode

marking

Dust protection mode

marking

(if tc)

Index of

protection

min

2II 3 G Ex ec IIC T3 Gc / IP 55

2 & 22 II 3 D Ex ec IIC T3 Gc Ex tc IIIC T125°C Dc IP 55

Special ATEX marking IECEx

II3G, or, II 3G and II 3D : ATEX/IECEx marking

Ex ec : “spark-free envelope” protection mode

IIC : Equipment group “gas”

T3 : Temperature class “gas”

Gc : EPL level "gas"

Ex tc : Protection mode “dust” (option)

IIIC : Equipment group "dust" (if tc)

T125°C : Maximum surface temperature (if tc)

Dc : “dust” EPL level

INERIS ... X : ATEX attestation number

IECEx INE... : IECEx certicate no.

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

2 - STORAGE

Prior to commissioning, motors should be stored:

- in a dry location, in their original packaging and protected

from moisture: for relative humidities in excess of 90% the

insulation may fall off very rapidly and around 100% may be

practically zero. Monitor the condition of the rust prevention

protection of unpainted parts. Storage conditions can be

between -40°C and +80°C. For storage in an environment at

between -40°C and -20°C: avoid impacts with the motor

(damage due to the impact resistance of the equipment at

these temperatures).

For very long period storage the motor may be packaged in a

sealed envelope (e.g. thermo-welded plastic) with desiccator

packs inside:

- protected from large and frequent temperature variations in

order to prevent condensation. During the storage periods only

drain plugs should be removed to eliminate condensation

water.

- if the area is subject to vibration, try to reduce the effect of this

vibration by placing the motor on a damping support (rubber

plate or similar).

- turn the rotor a fraction of a turn once a fortnight to prevent the

bearing rings from becoming marked.

- do not remove the rotor locking device (if there are roller

bearings).

Even if the motor has been stored in the correct conditions,

certain checks must be carried out before it is started up:

Greasing

- Motors equipped with permanently greased bearings:

Maximum storage period: 2 years. After this time, replace the

bearings.

- Motors equipped with bearings that can be re-greased:

Storage period

Less than 2

years

The motor may be commissioned if the

recommendations indicated in § 3 are

followed to the letter.

More than

2 years

Bearings must be replaced and bearing

housings (or anges) must be cleaned

and degreased in order to renew the

grease entirely, in accordance with the

information shown on the nameplate

(quantity and type of grease).

Replace shaft passage seals and for IP66

motors recess seals before starting.

Greases used by NIDEC LEROY-SOMER:

See nameplates.

Warning! Do not carry out the high voltage test

on auxiliaries.

In the event of the machine being re-painted, the

thickness of the coat must not exceed 2 mm and

0.2 mm for IIC group equipment. Otherwise it must be

anti-static irrespective of its thickness if the motor is II

3G and II 3D.

3 - COMMISSIONING

Before starting users are responsible for checking that the

equipment, the gas (and if relevant dust) group and conditions

of use are compatible.

In all cases, compatibility of the motor and its environ-

ment must be guaranteed before its installation and

also throughout its life.

Electric motors are industrial products.

THEY must therefore be installed by

qualied, experienced and authorized personnel. The

safety of people, animals and property must be

ensured when tting the motors into machines (please

refer to current standards).

3.1 - Protocol for lubrication during

commissioning

Given the “pot” storage lives stated by oil companies and the

transport and storage conditions, the rotation systems of all

motors must be subject to enhanced monitoring during the rst

week of operation.

The aim of this monitoring is to ensure that an oil lm is formed

on the bearing tracks, thus ensuring optimum operation of the

rotation system. Finally, this means that on the one hand

personnel can become familiar with the operation of the

equipment and on the other hand allows any teething troubles

associated with the installation to be identied.

The amount of grease indicated for re-greasing on the

nameplate must be added when topping-up with grease.

Greases must not be mixed. Grease used for top-ups must be

that stated on the nameplate.

If mixed accidentally, bearing housings (or anges) must be

removed and fully cleaned and degreased, and the bearings

must be changed.

In specic terms, the operations to be carried out during

installation are as follows:

• Before installing the motor, top-up with grease and

rotate the motor by hand for ten or so turns.

• After starting the motor (10 min), top up with grease.

• After 24 hours continuous operation, top up with grease.

• After an operating period of 100 to 200 hours, top up with

grease.

• During this starting period (up to 50 hours operation

after the last top up) there must be intensive monitoring.

The bearing housing temperatures and vibration must

be measured frequently.

This data is to be retained by operators. It represents a

databaseandhistorywhichwillbeusefulforfuturemaintenance.

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

3.2 - Checking the insulation

Throughout the period required for checking insulation, ensure

that there is no explosive atmosphere present.

Before operating the motor we

recommend checking the insulation between

phases and earth and between phases.

Motors are factory-tted with preventative advice labels

which must kept legible.

Before commissioning remove condensation (see §10.4

- ROUTINE MAINTENANCE)

This check is essential if the motor has been stored for longer

than 6 months or if it has been kept in a damp atmosphere.

This measurement must be carried out using a megohmmeter

at 500 volts DC (do not use a magneto-electric system).

It is better to carry out an initial test at 30 or 50 volts and if the

insulation is greater than 1 megohm, carry out a second test at

500 volts DC for 60 seconds. The insulation value must be at

least 10 megohms in cold state.

If this value cannot be achieved, or routinely if the motor might

have been splashed with water or salt spray, or kept for a long

periodinaveryhumidplace,orifitiscoveredwithcondensation,

it is recommended that the stator be dried for 24 hours in an

oven at a temperature of 110 °C to 120 °C.

If it is not possible to dry the motor in an oven:

- supply the motor, with the rotor immobilised, with a

three-phase AC voltage which is 10% below the rated voltage,

for 12 hours (use an induction regulator or a step-down

transformer with adjustable points).

- or supply it with DC supply with the 3 phases in series, with a

voltage value of 1 to 2% of the rated voltage (use a separate

excitation DC generator or batteries for motors of less than 22 kW).

- NB: The AC current must be monitored using a clamp-on

ammeter, DC using a shunt ammeter. This current must not

exceed 60 % of the rated current.

It is recommended that a thermometer be tted to the motor

frame: if the temperature exceeds 70 °C, reduce the indicated

voltage or current by 5 % of the original value for every 10 °C

difference.

While it is drying, all the motor orices must be open (terminal

box, drain holes). Before starting replace all plugs so that the

motor exhibits the plated degree of protection. Clean the

orices and plugs before retting them.

Warning! Since the high voltage test was carried

out at the factory before dispatch. If it needs to be

repeated, this should be performed at half the standard

voltage, i.e.: 1/2 (2U+1000V). Check that the capacitive

effect resulting from the high voltage test is eliminated

before connecting the terminals to ground.

For all motors before commissioning:

- remove the dust from the entire machine

- rotate the motor at no load (no mechanical load) for 2 to

5 minutes, checking that there is no abnormal noise. If

there is any abnormal noise, see section 10.

4 - INSTALLATION

4.1 - Position of the lifting rings

The lifting rings are provided for lifting

only the motor. They must not be used to lift the

machine after the motor has been tted to it.

Labour regulations stipulate that all loads over 25 kg must be

tted with lifting devices to facilitate handling.

The overall mass of motors can vary according to their power,

their mounting position and whether the motors are tted with

optional equipment. The actual weight of each Nidec Leroy-

Somer motor is indicated on its nameplate. The positions of the

lifting rings and the minimum dimensions of the loading bars

are given below in order to help with preparation for handling

the motors. If these precautions are not followed, there is a risk

of warping or crushing some equipment such as the terminal

box, protective cover or drip cover.

Type Horizontal position

Ae min h min Øt

100 120 200 150 9

112 120 200 150 9

132 160 200 150 9

160 200 160 110 14

180 MR 200 160 110 14

180 L 200 260 150 14

200 270 260 165 14

225 ST/MT 270 260 150 14

225 M 360 265 200 30

250 360 380 200 30

280 360 380 500 30

315 S 310 380 500 17

315 M/L 360 380 500 23

355 310 380 500 23

355 LK - 400 735 710 500 30

400 LK - 450 730 710 500 30

2 x Øt

• Horizontal position

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Motors intended for use in the vertical position

may be delivered on pallets in a horizontal position.

When the motor is pivoted, the shaft must under no

circumstances touch the ground as the bearings could

be irreparably damaged.

View from above Side view

Type Vertical position

C E D N ØS e min* h min

160 320 200 230 2 14 320 350

180 MR 320 200 230 2 14 320 270

180 L 390 265 290 2 14 390 320

200 410 300 295 2 14 410 450

225 ST/MT 410 300 295 2 14 410 450

225 M 480 360 405 4 30 540 350

250 480 360 405 4 30 540 350

280 S 480 360 485 4 30 590 550

280 M 480 360 585 4 30 590 550

315 S 590 - 590 2 17 630 550

315 M/L 695 - 765 2 24 695 550

355 755 - 835 2 24 755 550

355 LK - 400 810 350 1135 4 30 810 600

400 LK - 450 960 400 1170 4 30 960 750

* If the motor is tted with a drip cover, allow an additional 50 to 100 mm to avoid

damaging it when the load is swung.

4.2 - Location - ventilation

Our motors are cooled in accordance with method IC 411

(standard IEC 60034-6) i.e. “machine cooled by its surface,

using the ambient uid (air) owing along the machine”.

The fan at the non-drive end cools the motor. Air is sucked in

through the grille of a fan cover (which provides protection

against the risk of direct contact with the fan in accordance with

standard IEC 60034-5) and blown along the housing ns to

ensure thermal equilibrium of the motor whatever the direction

of rotation.

The motor is to be installed in an adequately ventilated area,

where the air inlets and exits are free by a value of at least a

quarter of the frame height.

Check that the fan cover bears no impact marks.

Blocking (clogging) the cover grille and the housing ns,

even accidentally, will adversely affect the operation of

the motor and its safety.

With vertical operation with shaft extension downwards, it is

recommended that the motor be equipped with a drip cover to

prevent the entry of any foreign matter.

It is necessary to check that the hot air is not being recycled. If

it is, pipes must be provided for the intake of cold air and

expulsion of hot air, in order to prevent abnormal motor

temperature rise.

In this case, if the air is not circulated by an auxiliary fan, the

dimensions of the pipes must be such that the pressure losses

are negligible compared to those of the motor.

Installation

Possibility of additional external heat

The motor temperature class does not take additional external

heat into account (e.g. pump circulating a hot uid).

The motor must be mounted in the position specied on

the order, on a base which is rigid enough to prevent

distortion and vibration.

Where the motor feet have six xing holes, it is preferable to

use those which correspond to the standard dimensions for the

motor power rating (refer to the asynchronous motors technical

catalogue) or failing this to those shown at B2.

Provide easy access to the terminal box, the condensation

drain plugs and, if appropriate, to the grease nipples.

Use lifting equipment which is compatible with the weight of the

motor (indicated on the nameplate).

When the motor is tted with lifting rings,

they are solely for lifting the motor and must not

be used to lift the whole machine after the motor has

been tted to it.

Note 1: When installing a suspended motor, it is essential

to provide protection in case the xing breaks.

Note 2: Never stand on the motor.

n x ØS

• Vertical position

1/4 H min

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4.3 - Preparation of the xing support

Installers must pay particular attention to ensuring good

preparation of the motor xing support.

Specic points to be observed:

• All metal supports must have undergone anti-corrosion

treatment.

• The design and the dimensions of the support must

prevent any vibration being transmitted to the motor, as

well as any vibration caused by resonance.

• The support must be level and sufciently rigid to

enclose any short-circuit effects.

• The maximum level difference between the motor xing

feet must not exceed +/- 0.1 mm.

0.1 mm max Level straight-edge

Fixing feet position

4.4 - Coupling

Preparation

Rotate the motor by hand to detect any possible fault due to

handling.

Remove any protection from the shaft extension.

Drain off any condensation water that has formed inside the

motor by removing the plugs from the drain holes. Before

commissioning these plugs must be replaced and the motor

must exhibit the plated degree of protection.

Rotor locking device

For made-to-order motors with roller bearings, remove the

rotor locking device.

In exceptional circumstances when the motor has to be moved

after the coupling device has been tted, the rotor must be re-

immobilized.

Balancing

Rotating machines are balanced in accordance with standard

IEC 34-14:

- half-key when the shaft extension is marked H.

When specically requested, balancing may be carried out:

- no key when the shaft extension is marked N,

- full key when the shaft extension is marked F,

any coupling element (pulley, coupling sleeve, slip-ring, etc.)

must therefore be balanced accordingly.

Motor with 2 shaft extensions:

If the second shaft extension is not used, in order to

conform to the balancing class the half-key or key must be

rmly tted in its groove so that it is not ejected during

rotation (H or F balancing) and to protect it against direct

contact.

4.5 - Important information to be taken

into consideration during installation

- Equipment to which this manual applies may not be

commissioned before the machinery in which it is installed has

been declared to conform to the Directives that apply to it.

- When motors are supplied by suitable electronic converters

and/or controlled by electronic command and control devices,

they must be installed by a professional who will be responsible

for ensuring compliance with the electromagnetic compatibility

regulations for the country in which the product is installed.

- As standard the motors’ impact resistance corresponds to

“low” mechanical risk, therefore they must be installed in a low

mechanical risk environment.

- All unused orices must be blocked off using Ex threaded

plugs.

- All accessories (cable glands, plugs etc.) cited in this notice

must be of a type that is attested or certied for the group, the

application (gas and/or dust) and the temperature class which

correspond as a minimum to those for the location of the

equipment (see the information on the nameplate). They are

correctlytightened ontotheir support.A‘’KLINGERSILC-4400’’

bre seal, for example, is placed between the cable glands, the

plugs and their support. Cable glands must be appropriate for

the supply cable and any auxiliary cables. The cables are

correctly gripped in the cable glands.

Fitting must comply with the requirements of their instructions

for use.

- The assembly of all these components must ensure the mode

of protection (Ex) and the protection indices (IP, IK) specied

on the nameplates.

- All threaded components must be fully tightened.

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5 - ELECTRICAL PARAMETRES -

LIMITING VALUES

5.1 - Limitation of disturbances caused

by starting of motors

To ensure preservation of the installation, any signicant

overheating of pipework must be avoided whilst ensuring that

the protective devices do not intervene during starting.

Disturbances resulting in the operation of other equipment

connected to the same source are due to the voltage drop

caused by the current demand on starting (multiple of the

current passing through the motor at full load (about 7) see

NIDEC LEROY-SOMER asynchronous motors technical

catalogue).

Even though networks are increasingly capable of allowing

direct starting, current demand must be reduced for certain

installations.

Jerk-free operation and smooth starting mean that the driven

machinery will be easier to use and have a longer operating

life.

The two essential parameters for starting squirrel cage

synchronous motors are:

- starting torque

- starting current.

The starting torque and the resistive torque determine the

starting time.

Depending on the driven load, the torque and current can be

altered to match the starting options of the machine and to

match the supply options.

The ve essential modes are:

- D.O.L. starting,

- star/delta starting,

- soft starting with autotransformer,

- soft starting with resistors,

- electronic starting.

Electronic starting modes control the voltage at the motor

terminals throughout the entire starting phase, giving very

gradual smooth starting.

5.2 - Supply voltage

The rated voltage is indicated on the nameplate.

5.3 - Starting times

Starting times must remain within the limits indicated below on

condition that there are 6 or less starts during one hour.

Three successive cold starts and two consecutive hot starts

are allowed.

Permissible motor starting time as a function of the ratio ID/ IN.

In the event of frequent or difcult startup conditions, equip

motors with thermal protection devices (see § 6 - USE).

5.4 - Supply with frequency inverter

See § 7.1.

5.5 - Operating duty

Nidec Leroy-Somer spark-free motors are certied for

operating in S1, S2, S6 and S9 duty and in accordance with

IEC/EN 60034-1.

As standard motors operating at variable speeds are plated as

follows:

* Mains supply plate: S1 duty.

* Drive plate: S9 duty.

Time (secs)

5567Id/In 8 9 10

Hot startingCold starting

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6 - USE

Thermal protection devices (see § 8) and heaters

Type Operating

principle

Operating

curve

Switch

rating (A) Protection provided Mounting

Number of devices*

Positive temperature

coefcient thermistor

PTC

non-linear variable

resistor,

indirectly heated

TNF

general surveillance

for transient overloads

Mounted with associated relay

in control circuit

3 in series

Thermocouples

T (T<150°C)

Constantan Copper

K(T<1000°C)

Copper Copper-Nickel

Peltier effect

continuous surveillance

of hot spots at

regular intervals

Mounted in control panels with

associated reading equipment

(or recorder)

1 per hot spot

Platinum temperature

sensor

PT 100

Linear variable

resistor

indirectly heated

high precision

continuous surveillance

of key hot spots

Mounted in control panels with

associated reading equipment

(or recorder)

1 per hot spot

- NRT: nominal running temperature.

- The NRTs are chosen according to the position of the sensor in the motor and the temperature rise class.

* The number of devices relates to the winding protection.

Alarm and early warning

All protective equipment can be backed up by another type of

protection (with different NRTs): the rst device will then act as

an early warning (light or sound signals given without shutting

down the power circuits), and the second device will be the

alarm (shutting down the power circuits).

Protection against condensation: space heaters

Marking: 1 red label

A glass bre exible resistor is xed on 1 or 2 coil end turns.

This resistor heats the machines when stopped and thus

prevents condensation inside the machines.

Power supply: 230 V single-phase unless otherwise specied

by the customer.

Recommended for use when ambient temperatures ≤ 20°C. In

allcasesthepowerdissipatedmustensurethatthetemperature

classication of the motor is observed.

Heaters or heating using the introduction of ac voltage must

only be used when the motor is de-energised and cold.

The drain plugs at the bottom of the motor must be opened

every six months or so. They must be retted in place and the

motor degree of protection guaranteed.

Thermo-magnetic protection

Motors are protected by the magneto-thermal device placed

between the isolating switch and the motor. These protection

devices provide total protection of the motor against non-

transient overloads.

This device may be accompanied by fused circuit breakers.

Built-in indirect thermal protection

Motors may be equipped with thermal sensors as an option.

These sensors follow the temperature changes at “hot spots”:

- overload detection,

- cooling check,

- monitoring characteristic points for maintenance

of the installation,

guarantee of hot spot temperatures.

Thermal protection devices for (F)LSN motors must be

connected to an “ic” minimum certied intrinsic safety barrier.

If resistance variation, semi-conductor or thermocouple

sensors are used, users must ensure that the safety circuit

comprising probes, cables and actuators comply with the

requirements of standard EN 50495.

The associated equipment must cause the motor to stop when

the values of the thermal protection indicated below are

reached (see § Electrical characteristics of sensors and

thermocouples below).

In order to ensure that the maximum temperature is

never reached, thermal sensors inside the

equipment, when these are mandatory, must be

connected to a device (functionally independent and

additional to any system which might be necessary for

operation under normal conditions) which causes de-

energisation of the motor when the thermal protection

values below are reached.

Under no circumstances can these sensors be used

to carry out direct regulation of the motor operating

cycles.

Control and shut-off devices must be installed in

panels located outside the hazardous zone or be of

a recognised type.

Temperature sensor operating thresholds:

Temperature

classes

Maximum value of the

winding sensor and of

adjustment of associated

equipment

Maximum value of the

bearing sensor and of

adjustment of associated

equipment

Frame size (F)LSN

80 to 250

(F)LSN

280 to 355

(F)LSN

80 to 250

(F)LSN

280 to 355

T6 100°C 100°C 80°C 70°C

T5 110°C 100°C 90°C 70°C

T4 150°C 130°C 120°C 80°C

T3 150°C 140°C 120°C 90°C

Maximum tempera-

ture

of dust motor

surface

Maximum value of the

winding sensor and of

adjustment of associated

equipment

Maximum value of the

bearing sensor and of

adjustment of associated

equipment

Frame size (F)LSN

80 to 250

(F)LSN

280 to 355

(F)LSN

80 to 250

(F)LSN

280 to 355

85°C 100°C 100°C 70°C 70°C

100°C 110°C 110°C 90°C 90°C

125°C 130°C 140°C 110°C 110°C

135°C 150°C 140°C 110°C 110°C

145°C 150°C 140°C 110°C 110°C

Electrical characteristics of sensors and thermocouples:

* I max = 5A.

* U max:

* for PT100 at 0°C = 2.5 V * for PTO/PTF = 7.5 V

* for PTC = 2.5 V * for thermocouple = 7.5 V

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7 - SPECIAL OPERATING

CONDITIONS

- Thermal protection (see § 6 & 9)

- Heaters (see § 6)

- Temperatures: storage and ambient

Note: Ta= ambient temperatures

If the motor has been stored at a temperature below - 10°C,

heat the motor (see § 3) and turn the shaft by hand before

operating the machine.

If the motor is to be used at a temperature lower than - 20°C, it

may be tted with heaters.

As standard construction, our motors are designed to operate

at ambient temperatures Tabetween - 20°C and 40°C.

If Ta< - 25°C, shaft passage seals must be made of silicone and

the fan must be metal. The terminal box gaskets must be made

of silicone.

- Surface temperature

As standard, the maximum surface temperature at any point of

the motor is 200°C as T3 with an ambient temperature ≤40°C.

If the motors are also used in dusty explosive surroundings, the

maximum surface temperature is 125°C.

- Installation zones

Motors bearing equipment group III marking may be installed

in dusty explosive atmospheres (zone 22).

- Connection

Particular attention must be paid to the information on the

nameplate in order to choose the correct type of connection to

the supply voltage.

Similarly the protection system and the supply cables (the

voltage drop during the starting phase must be less than 3%)

are to be selected according to the characteristics marked on

the nameplate.

- Earthing

The motor must be earthed in accordance with the applicable

regulations (protection of workers).

An external terminal on the frame is used for effective earth

connection of equipotential links. This terminal must be

prevented from working itself loose.

- Leak tightness

Monitor the condition of all seals and periodically replace them

if necessary. At the shaft passages, take care not to damage

the seals in contact with the keys and shoulders.

After removing drain plugs or ventilators where these are

present, ret them in place in order to ensure the IP 55 or IP 65

degree of protection of the motor. Replace the seals that are

removed using new seals with the same characteristics. Clean

the orices and plugs before retting them.

Whenever removed and during preventative maintenance,

replace seals (shaft passages, bearing housing recesses,

terminal box cover etc.) using new seals with the same

characteristics after cleaning the components. Shaft passage

seals must be tted using the same type of grease as the

bearings.

- Employee safety

Protect all rotating devices before power-up.

If a motor is started up without a coupling device having been

tted, carefully immobilize the key in its housing.

All measures must be taken to provide protection against risks

associated with rotation of components (sleeve, pulley, belts etc.).

Beware of backdriving when the motor is switched off.

Appropriate precautions must be taken:

- pumps, install a non-return valve, for example.

- NIDEC LEROY-SOMER “Digistart” electronic starter

This is micro-controlled multi-function electronic system,

which is used with all squirrel-cage asynchronous three-phase

motors.

It ensures smooth starting of the motor with:

- reduced starting current,

- smooth jerk-free acceleration achieved by controlling the

current in the motor.

After starting, the DIGISTART carries out additional motor

management functions in its other operating phases: steady

state and slowing.

- Models from 18 to 1600 A

- Power supply: 220 to 700 V - 50/60 Hz

The DIGISTART is low-cost to install, and only an additional

switch and fuses are required.

The “Digistart” electronic starter associated with the

motor must be installed outside the hazardous zone.

- Contactors - Main switches

In all cases contactors, main switches etc. must be

installed and connected in a panel outside the hazardous

zone or be of a recognised type.

- Shock resistance

The motor can withstand a low mechanical impact (IK 08

according to EN 50102). The user must provide additional

protection if there is a risk of signicant mechanical shock.

- Fitting sensors or accessories

In the event that sensors (vibration sensors for example) or

accessories (pulse generators for example) are tted, these

must be connected in a panel.All these accessories (as well as

the panel if it not located outside the explosive atmosphere)

must be of a type that is certied or attested for the group, the

application (Gas or Gas and dust) and the temperature class

which corresponds at least to that of the motor. Fitting must

comply with the requirements of their instructions for use.

- Noise level

Most (F)LSN motors have an acoustic pressure level of less

than 80 dB(A) (+/- 3dB) at 50Hz.

The values for each motor are given in our technical catalogue.

When the motors operate using a drive, please contact us for

the noise levels.

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7.1 - Variable speed use

7.1.1 - General

Drive control by a frequency inverter can in fact result in an

increase in the machine temperature rise, due to a signicantly

lower supply voltage than on the mains, additional losses

related to the wave form produced by the drive (PWM) and the

reduction in speed of the cooling fan.

Standard IEC 60034-17 describes numerous good practices

for all types of electric motor, however since this is

Nidec Leroy-Somers’ area of specialist expertise, we describe

the best ways to deal with variable speed in the section below.

The homologation conditions of our safety motors allow them

to operate on frequency drives on condition that the required

precautions are taken to ensure that under all circumstances

there is compliance with the temperature class marked on the

nameplate.

Drive control using a frequency inverter results in an increase

in the machine temperature rise, primarily as the result of a

reduction in cooling fan speed and a supply voltage which is

signicantly lower than that of the network. Consequently a

reduction must generally be made in the rated power of the

motor. Derating tables have been produced by our design

bureau based on under-load tests on platforms, and on the

requirements of IEC 60034-17. Depending on the application,

on the desired speed range and the torque prole of the driven

machine, Nidec Leroy-Somer will select the most suitable

safety motor. The drive, if of a type not designed for operation

in an explosive zone, must be located in a non-explosive zone.

In certain cases, the use of forced ventilation (where the fan is

driven by an auxiliary motor whose type has been certied)

may prove necessary. For small motors (frame height less than

160), the standard self-ventilated cooling mode (IC411) is

nevertheless to be preferred.

A device for measuring the actual speed of the motor using an

incremental or absolute encoder which is ATEX certied, may

also be installed at the rear of most of our safety motors.

ATEX motors supplied through a frequency inverter are

equipped with thermal protective devices in the winding.

These must operate independently of measuring and

control devices required for operation. Our derating

tables are based on a drive supply whose switching

frequency is equal to or greater than 3 kHz.

ADAPTATION OF MOTORS

A motor is always characterised by the following parameters,

which depend on the design:

- temperature class

- voltage range

- frequency range

- thermal reserve

CHANGES IN MOTOR PERFORMANCE

When power is supplied by a drive, changes are observed in

the above parameters due to certain phenomena:

- voltage drops in the drive components

- current increase in proportion with the decrease in voltage

- difference in motor power supply according to the type of

control (ux vector or U/f)

The main consequence is an increase in the motor current

resulting in increased copper losses and therefore a higher

temperature rise in the winding (even at 50 Hz).

Reducing the speed leads to a reduction in air ow and hence

a reduction in cooling efciency, and as a result the motor

temperature rise will increase again.

Conversely, in prolonged operation at high speed, the fan may

make excessive noise, and it is advisable to install a forced

ventilation system.

Above the synchronous speed, the iron losses increase

and hence cause further temperature rise in the motor.

The type of control mode inuences temperature rise in the

motor:

- A U/f ratio gives the fundamental voltage maximum at 50 Hz

but requires

more current at low speed to obtain a high starting torque and

therefore generates a temperature rise at low speed when the

motor is poorly ventilated.

- Flux vector control requires less current at low speed while

providing signicant torque but regulates the voltage at 50 Hz

and causes a voltage drop at the motor terminals, therefore

requiring more current at the same power.

The temperature classication was realised with an IGBT

drivesupply and PWM waveform, minswitching frequency

= 3kHz, U/f constant open loop.

CONSEQUENCES OF POWER SUPPLIED BY DRIVES

When power is supplied to the motor by a variable speed drive

with diode rectier, this causes a voltage drop (~5%).

Some PWM techniques can be used to limit this voltage drop

(~2%), to the detriment of the machine temperature rise

(injection of harmonics of orders 5 and 7).

The non-sinusoidal signal (PWM) provided by the drive

generates voltage peaks at the winding terminals due to the

signicant voltage variations relating to switching of the IGBTs

(also called dV/dt). Repeated overvoltages can eventually

damage the windings depending on their value and/or the

motor design.

The value of the voltage peaks is proportional to the supply

voltage.

This value can exceed the limit voltage for the windings which

is related to the wire grade, the impregnation type and the

insulation that may or may not be present in the slot bottoms or

between phases.

Another reason for attaining high voltage values is when

regeneration phenomena

occur in the case of a driving load, hence the need to prioritise

freewheel stops or stops that follow the longest permissible

ramp.

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7.1.2 - Minimum recommendations

The specic instructions given in the specic instruction

manuals must be followed if a drive is used. In particular the

following minimum requirements must be observed:

- Check that the drive switching frequency is 3 kHz minimum.

- Check that the motor has a second nameplate which give the

maximum characteristics and performance levels of the motor

during its use at variable speed.

- The reference voltage, usually 400V 50 Hz, is given on the

motor nameplate. The drive must deliver a constant voltage/

frequency ratio.

- Programme the maximum current value as well as the min

and max frequency values shown on the second nameplate of

the motor into the drive.

- Connect all the temperature sensors present on the motor

(windings and, if relevant, bearing housings) to safety devices

which are independent of those used for operation under

normal conditions.

Drives and sensor connection components must

be located outside hazardous zones (zones 0, 1, 2,

20, 21 and 22).

7.1.3 - Special conditions for safe use

- As standard the motors’ impact resistance corresponds to

“low” mechanical risk, therefore they must be installed in a low

mechanical risk environment.

- The motor must be equipped with 3 thermal sensors (1 per

phase) placed in or on the stator connection side winding

heads (all frame sizes) and on the front bearing housing (from

frame size 355) in the following cases:

- motor supplied by frequency inverter

- motor in a sufcient, non self-ventilated airow (IC418)

- motor adapted to no longer be self-ventilated (IC410)

- motor equipped with a backstop

- motor equipped with an auxiliary fan (IC416A) or radial

fan (IC416R)

- The thermal protection devices must be connected to a device

which de-energises the motor when the setting value is

reached and before the maximum temperature at any point on

the surface of the motor reaches the classication temperature

shown on the nameplate. This device must operate under

normal conditions and must be in addition to and functionally

independent of any system which might be necessary for

operation under normal conditions.

- Whenthemotorisequippedwithauxiliaryorforcedventilation

(IC416), a device must prevent the main motor operating in the

absence of ventilation. Stopping the auxiliary motor must

cause the main motor to stop.

- Heaters must only be supplied when there is no supply to the

motor and the latter is cold. Their use is recommended for

ambient temperatures of less than -20°C.

- Supply voltages and frequencies must comply with those

stated on the motor nameplate.

- The frequency range stated on the motor nameplate must be

strictly observed.

- In the event of several motors being supplied by the same

drive, for safety reasons individual protection must be provided

on each motor outlet (e.g. thermal relay).

- The specic instructions given in the specic instruction

manuals must be followed if a drive is used.

- Cable glands and components must be compatible with the

protection mode used for the connection portion. Alternatively,

with integral cables, the motor connection must be made

outside the explosive atmosphere or in a housing protected by

a recognised protection method which is suitable for this use.

- The degree of protection of the motor, of its main connection

housing and of any auxiliary connection box(es) is: IP55 - IK08.

The user must provide additional protection if there is a high

risk.

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7.1.4 - Extreme operating conditions and

specic features

MOTOR CONNECTIONS

Nidec Leroy-Somer do not recommend any specic

connections for applications operating with a single motor on a

single drive.

TRANSIENT OVERLOADS

Drives are designed to withstand transient overload.

When the overload values are too high, the system will

automatically shut down. Nidec Leroy-Somer motors are

designed to withstand these overloads, however in the event

of very repetitive operation we still recommend use of a

temperature sensor in the winding of the motor.

STARTING TORQUE AND CURRENT

Thanks to advances in control electronics, the torque available

when the motor is switched on can be adjusted to a value

between the rated torque and the variable speed drive

breakdown torque.

The starting current will be directly related to the torque (120 or

180%).

ADJUSTING THE SWITCHING FREQUENCY

The variable speed drive switching frequency has an impact

on losses in the motor and the drive, on the acoustic noise and

the torque ripple.

Alowswitchingfrequencyhasanadverseeffectontemperature

rise in motors.

Nidec Leroy-Somer recommends a drive switching frequency

of 3 kHz minimum.

In addition, a high switching frequency optimises the acoustic

noise and torque ripple level.

OPERATION AT SPEEDS HIGHER THAN THOSE

ASSIGNED BY THE MAINS FREQUENCIES

There are risks associated with the use of asynchronous

motors at high speed (speed higher than 3600 rpm):

• the cage may be damaged,

• bearing life may be impaired,

• there may be increased vibration,

• etc.

Motors are designed to operate at the speeds shown on the

nameplate (do not exceed the maximum speeds stated in our

technical catalogues).

When high-speed motors are used, they often need to be

adapted, and an in- depth mechanical and electrical design

exercise is needed.

CHOICE OF MOTOR

There are two possibilities:

a - The frequency inverter is not supplied by Nidec

Leroy-Somer.

All the motors in this catalogue can be used with a frequency

inverter.

Depending on the application, motors will need to be derated

by around 10% compared to the motor operating curves in

order to guarantee that motors will not be damaged.

b - The frequency inverter is supplied by Nidec Leroy-Somer

As these motor-drive assemblies have been specically

designed for use in combination, excellent performance is

guaranteed.

7.1.5 - Winding insulation and

recommendations relating to the mechanism

of rotation

The insulation systems used for Nidec Leroy-Somer motors

and recommendations for protection systems on the

mechanisms of rotation are indicated in our good practice

guide ref. 5626.

7.1.6 - Nameplates on motors operating with

variable speed drives

The performance levels of motors operating using variable

speed drives, shown on the VV nameplate, are values obtained

with PWM supplies, with 360V at the motor terminals, in

continuous operation.

That is, for the following two cases:

• 400V rated voltage before drive + drive voltage drop

of 40V.

• A – 10% + drive with no voltage drop.

Please contact us for other cases.

Some applications require special construction specications:

- Do not use a motor for lifting that is not rated S3 or S4.

- Do not use the motor with a different duty type from that on the

nameplate and in particular not in lifting applications.

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

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INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

8 - ADJUSTMENT

Tolerances and adjustments

Standard tolerances are applicable to the mechanical

characteristic values given in our catalogues. They comply

fully with the requirements of standard IEC 60072-1.

-Adhere strictly to the instructions provided by the transmission

device supplier.

- Avoid impacts which could damage the bearings.

Use a screw device and grease the tapped hole of the shaft

extension with a special lubricant (e.g. molykote grease) to

make it easier to t the coupling.

The hub of the transmission device must be :

- Fully in contact with the shoulder of the shaft or, if this is

missing, hard up against the metal stop ring to form a labyrinth

seal and thus lock the bearing in place (do not crush the seal);

- longer than the shaft extension (by 2 to 3 mm) so that it can

be tightened using a screw and washer. If it is not, a spacer ring

must be inserted without cutting the key (if this ring is large, it

must be balanced).

Supported Supported

on the shaft shoulder on the stop ring

In the case of a second shaft extension, it must only be used

for direct coupling and the same recommendations must be

followed.

The 2nd shaft extension may also be smaller than

the main shaft extension and may under no

circumstances supply torques greater than half the

rated torque.

Inertia ywheels must not be mounted directly onto the shaft

extension, but installed between bearing housings and

connected by a coupling sleeve.

Direct connection to the machine

When mounted directly on the motor shaft extension of the

moving device (pump or fan turbine), check that this device is

perfectly balanced and that the radial force and the axial thrust

are within the limits indicated in the catalogue for bearing

performance.

Direct connection using a coupling sleeve

Selection of the coupling sleeve should take account of the

rated torque to be transmitted and the safety factor dependent

on the starting conditions for the electric motor.

The machines must be carefully aligned, so that any lack of

concentricity and parallelism in the two coupling halves is

compatible with the coupling sleeve manufacturer’s

recommendations.

The two parts of the coupling sleeve should be temporarily

assembled to make it easier to alter their relative position.

Adjust the parallel plane of both shafts using a gauge. Measure

the distance between the two coupling surfaces at one point on

the circumference. Rotate them 90°, 180° and 270° in relation

to this initial position, and measure each time. The difference

between the two extreme values of dimension “x” must not

exceed 0.05 mm for standard couplings.

To perfect this adjustment and at the same time check the

concentricity of the two shafts, t 2 gauges as shown in the

diagram and slowly turn both shafts.

The deviations registered by either shaft will indicate the

need for an axial or radial adjustment if the deviation exceeds

0.05 mm.

Direct connection using a rigid coupling

The two shafts must be aligned so as to adhere to the coupling

sleeve manufacturer’s tolerances.

Maintain the minimum distance between the shaft extensions

to allow for expansion of the motor shaft and the load shaft.

Ø (mm) A (mm)

min

9 to 55 1

60 1.5

65 1.5

75 2

80 2

Transmission via belt pulleys

When tting a pulley/belt, check that

the motor withstands the radial loads.

The user chooses the diameter of the pulleys.

Castironpulleyswithadiameterover315arenotrecommended

for rotation speeds of 3,000 rpm.

Flat belts cannot be used for rotation speeds of 3,000 rpm or

more.

Appui

sur épaulement d'arbre

Appui

sur bague de butée

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

Positioning the belts

The belts must be anti-static and ame

propagation must only occur with difculty.

So that the belts can be correctly positioned, allow for possible

adjustment of approximately 3 % with respect to the calculated

distance E.

Force must never be used when tting the belts.

For notched belts, position the notches in the pulley grooves.

Aligning the pulleys

Check that the motor shaft is completely parallel with that of the

receiving pulley.

Protect all rotating devices before power-up.

Adjusting the belt tension

The tension of the belts must be adjusted very carefully in

accordance with the recommendations of the belt supplier and

the calculations made when the product was specied.

Reminder:

-tension toogreat =unnecessary forceonthebearinghousings

which could lead to premature wear of the bearing unit (bearing

housing-bearings) and eventually break the shaft;

- too little tension = vibration (wearing of the bearing unit).

Fixed distance between centres:

Place a belt tensioning pulley on the slack side of the belts:

- smooth pulley on the outside of the belt;

- grooved pulley on the inside of the belts when using V-belts.

Adjustable distance between centres:

The motor is usually mounted on slide rails, which enables

optimum adjustment of the pulley alignment and the belt

tension.

Place the slide rails on a perfectly horizontal baseplate.

The lengthways position of the slide rails is determined by the

length of the belt, and the crossways position by the pulley of

the machine being driven.

Mount the slide rails rmly with the tension screws in the

direction shown in the diagram (the slide rail screw on the belt

side between the motor and the machine being driven).

Fix the slide rails to the baseplate and adjust the belt tension

as before.

Thermal protection

In-line protection

Adjusting the thermal protection (see § 6)

Itmustbesettothecurrentvalueshownonthemotornameplate

for the voltage and frequency of the connected supply.

Tension screw

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

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5724 en - 2020.02 / c

NE PAS OUVRIR SOUS TENSION

NE PAS OUVRIR SI UNE ATMOSPHERE

EXPLOSIVE PEUT ETRE PRESENTE

DO NOT OPEN WHEN ENERGIZED

DO NOT OPEN WHEN AN EXPLOSIVE

ATMOSPHERE MAY BE PRESENTE

AVERTISSEMENT

WARNING

ref. HS51A 31

PSI070EA050

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

9 - MAINS CONNECTION

9.1 - Terminal box

If the threaded hole(s) of the orice(s) intended to receive

cable gland(s) or conduit(s) have/has ISO metric threads,

there is no specic marking present on the motor. If the type of

thread is different or mixed, the type(s) are marked on the

equipment.

It is placed as standard on top and at the front of the motor. It

offers an IP 65 degree of protection and is equipped with cable

glands.

Caution: the position of the terminal box cannot easily be

changed, even with anged motors, as the condensation drain

holes (if present) must be at the bottom.

Cable gland

The standard position of the cable gland is on the right when

viewed from the drive end (1).

If the special position of the cable gland has not been correctly

specied on the order, or is no longer suitable, the symmetrical

construction of the terminal box enables it to be turned in 4

directions except for position (2) for motors with smooth holed

anges (B5).

A cable gland must never open upwards.

Check that the incoming cable bend radius prevents water

entering via the cable gland.

Terminal box positions Cable gland positions

Cable size

Matchthecableglandandanyassociated expander

or reducer to the diameter of the cable used, in

accordance with the specic instructions for the cable

gland.

In order to maintain the motor’s original IP protection, it

is essential to ensure leak-tightness between the rubber

ring and the cable by tightening the cable gland correctly

(so that it cannot be unscrewed by hand).

Unused cable glands must be replaced by threaded

plugs.

Unused orices must also be blocked off using threaded

plugs. It is essential to ensure that the tting of cable

glands or blanking devices is carried out with a seal,

silicone or polyurethane sealant being made between

the cable glands, the plugs, the reducers and (or)

expanders, the support or the box body.

Where conduit glands are used for connection, thread

leak tightness may be enhanced using grease. These

threads must be sealed using silicone or polyurethane

sealant or bonded using thread locking compound.

Installers are responsible for ensuring that the

leak-tightness of cable passages is achieved (see

the motor nameplate and the cable gland tting

instructions).

All accessories must be of a type that is attested

or certied for the group, the application (gas and/

or dust) and the temperature class which

correspond as a minimum to those for the location of the

equipment.

Motors are factory- tted with warning labels

which must be kept legible.

Under no circumstances must the cable be

used for handling the motor.

9.2 - Connection to the electrical

supply:

Connection to external power circuits must be in accordance

with requirements of the standard IEC/EN 60079-14 and the

regulations that are in force.

Alternatively, with integral cables the motor connection must

either be made outside the explosive atmosphere, or protected

by a protection method that is suitable for the application (gas

and/or dust) and the temperature class which corresponds at

leasttothatofthe locationof theequipment(seetheinformation

on the nameplate). Cables must be class C2 minimum and/or

with gland packing.

If the motor is supplied with a cable gland support plate or un-

drilled conduits:

- the drilling diameter of the smooth holes for cable glands or

conduits must not be greater than the diameter of the thread of the

cable gland or conduit + 2 mm and must be de-burred (broken

angles about 0.5 mm x 45°) on each side of the thin plate.

- the installation of cable glands or conduit entry glands by the

installer must ensure that the degree of safety (preservation of

the explosion-proof character and/or of the IP) required by the

application (gas and/or dust) and the motor temperature class

is preserved.

If the motor is supplied with drillings but without cable or conduit

glands:

- the installation of cable glands or conduit entry glands by the

installer must ensure that the degree of safety (preservation of

the explosion-proof character and/or of the IP) required by the

application (gas and/or dust) and the motor temperature class

is preserved.

If the motor is supplied with holes for cable glands blocked using

non-certied plugs, replace them using components which are

certied for the group, the application (gas and/or dust) and the

temperature class which correspond at least to those of the

motor: cable glands if connection, or plugs if unused orices.

Standard

position

Standard

position

Maintenance and service guide - LSN-FLSN ZONE 2 - Ex ec

5724 en - 2020.02 / c

Adaptors (expanders or reducers) underneath plugs are

prohibited. 1 adaptor only is allowed per cable gland.

If the connection box is type “eb” and comprises one or more

threaded holes intended to receive cable glands, then unless

stated otherwise these threaded holes are of the “ISO” type.

Supply voltages and frequencies must comply with those

stated on the motor nameplate. Please contact us for all other

conditions relating to the power supply.

Make connections as per the coupling instructions on the

nameplate and the wiring diagram contained in the terminal

box. Check the direction of rotation of the motor (§9.4).

The choice of connection cables is determined by the current,

the voltage, the length and the temperature “T.cable” (if shown

on the motor nameplate).

The connection must meet the requirements of the installation

rules set by the standards and application of the regulations

that are in force. A qualied person must be responsible for the

connection, who will ensure:

* conformity of the connection box (protection mode Ex, IP, IK

etc...).

* conformity of the connection to the terminal block and

tightening torques.

* that the air gaps required by standards are observed; where

rotation is not prevented by the connection component, by the

barrel insulation of each power supply cable connector using

adhesive bonded heat-shrink sleeving. This sleeve must cover

the cable over a length of at least 15 mm. From each terminal

place the cables tted with their connectors parallel to one

another in order to achieve the maximum insulation distances.

The fastenings used for connecting cables must be of the

same nature as the terminals (do not t steel fastenings on

brass terminals, for example).

When the motor is equipped with an auxiliary fan, this must be

of a type that is certied for the group, the application (Gas and/

or dust) and the temperature class that corresponds at least to

that of the main motor. The supplies to both motors must be

connected such that energisation of the main motor must be

dependent on energisation of the auxiliary motor. Stopping the

auxiliary motor must cause de-energisation the main motor.

The installation must include a device which prevents the main

motor from operating if there is no ventilation.

Do not connect the motor if you are unsure how to interpret

the connection circuit diagram or if the latter is missing:

please contact us.

Installers are responsible for ensuring that the rules for

electrical compatibility in the country in which the products are

used are followed.

9.3 - Terminal block connection wiring

diagram

All motors are supplied with a wiring diagram in the terminal

box. If necessary this wiring diagram should be requested from

the supplier, stating the type and number of the motor shown

on the motor nameplate.

The connector links required for coupling can be found inside

the terminal box.

Single speed motors are tted with an Ex safety block of 6

terminals, with the terminal markings complying with IEC

60034-8 (or NFC 51-118).

9.4 - Direction of rotation

When the motor is running in U1, V1, W1 or 1U, 1V, 1W from a

direct mains supply L1, L2, L3, it turns clockwise when seen

from the main drive shaft end.

If any two of the phases are changed over, the motor will run in

the reverse direction (make sure that the motor has been

designed to run in both directions).

If the motor is tted with accessories (thermal protection or

spaceheater),thesemaybeconnected:either tostripterminals

of a certied type, or to non-certied terminal strips.

Motor equipped with a terminal block

9.5 - Earth terminal and earthing

The motor must be earthed in accordance with the

applicable regulations (protection of workers).

An earth terminal is located inside the terminal box and another

outside the on the cover. They are indicated by the symbol:

Jumper screws, lock washers, screws or lock-nuts or thread-

locking compound must be used to ensure that they do not

become loose.

Cable sizing must be in accordance with the requirements of

standard 60079-0.

Earth cable cross-sections as a function of motor supply cable

cross-sections:

Phase conductor

cross-section in mm2

Min earth or protection conductor

cross-section mm2

4 4

6 6

10 10

16 16

25 25

35 25

50 25

70 35

95 50

120 70

150 75

185 95

240 120

300 150

400 200

Sensor

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

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5724 en - 2020.02 / c

INSTALLATION AND MAINTENANCE – LSN-FLSN ZONE 2 – Ex ec

9.6 - Connecting the power supply

cables to the terminal block

The cables must be tted with connectors suitable for the cable

cross-section and the terminal diameter (diagram 1 and 3).

They must be crimped in accordance with the connector

supplier’s instructions.

9.6.1 - Ex eb ring connector terminal block

These terminal blocks allow standard round connectors to be

used. They are tted to the housing and held by 2 locked

screws.

The following are positioned, in order, on each terminal:

- 1 : the motor cable connector, barrel immobilised,

- 2 : the power supply cable connector, barrel immobilised,

- 3 : the anti-rotation jumper screw,

- 4 : the Y or Dconnector links,

Tightening torque (N.m) on the slotted terminal block nuts

Terminal M4 M5 M6

Steel 2 3.2 5

Brass 1 2 3

9.6.2 - Slotted terminal block (LSN 180 to 280)

The motor winding connection cable is xed to the slotted

terminal connector either of the soldered KAtype (open barrel)

made of tinned brass, or of the QUCA type (closed barrel)

made of tinned copper and crimped using a suitable pliers.

The mains connection cable is placed in the terminal slot,

beneath the connector, and tightened to the recommended

tightening torque, at the same time as the connector and the

connector link, using the nut.

- 1: slotted terminal - 4: connector links

- 2: retaining nut - 5: winding connection connector

- 3: lock washer - 6: slot for mains supply cable

Tightening torque (N.m) on the slotted terminal block nuts

Terminal KS7A KS8A KS10A KS14A KS18A

Steel 5 6 6 10 16

Max connection cross-section for slotted terminal blocks

Terminal KS7A KS8A KS10A KS14A KS18A

Rigid or multiple wires mm22.5 4 6 10 -

Rigid wire mm24 6 10 16 -

Max current (rigid wire) A35 46 63 85 -

- Earth terminal and earthing:

This is situated inside the terminal box; in some cases, the earth

terminal can be situated on one of the feet or on one of the

cooling ns (round motors). It is indicated by the symbol:

The motor must be earthed in accordance with the

applicable regulations (protection of workers).

*If necessary this wiring diagram should be requested from the

supplier, stating the type and number of the motor shown on

the motor nameplate.

- Connecting the power supply cables to the terminal

block:

The cables must be tted with connectors suitable for the cable

cross-section and the terminal diameter.

They must be crimped in accordance with the connector

supplier’s instructions.

They must be connected with connector resting on connector

(see diagrams below):

9.6.3 - Terminal block without slot

Tightening torque (N.m) on the terminal block nuts

Terminal M4 M5 M6 M8 M10 M12 M16

Steel 2 3.2 5 10 20 35 65

Brass 1 2 3 6 12 20 50

2 connectors

max per

terminal

{

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