nord NORDAC SK 5xxE Series User manual

MANUAL
NORDAC SK 5xxE
Frequency inverter
SK 5xxE-250-112-O ... SK 5xxE-750-112-O
(0.25kW … 0.75kW, 1~ 115V, output 3~ 230V)
SK 5xxE-250-323-A ... SK 5xxE-401-323-A
(0.25kW … 4.0kW, 1/3~ 230V)
SK 5xxE-550-340-A ... SK 5xxE-751-340-A
(0.55kW … 7.5kW, 3~ 400V)
BU 0500 GB


NORDAC SK 5xxE Manual Safety information
2 BU 0500 GB

NORDAC SK 5xxE Manual Safety information
BU 0500 GB 3
NORDAC SK 5xxE Frequency Inverter
Safety and operating instructions for drive power converters
(as per: Low voltage guideline 73/23/EEC )
1. General
During operation, drive power converters may have, depending
on their protection class, live, bare, moving or rotating parts or hot
surfaces.
Unauthorised removal of covers, improper use, incorrect
installation or operation leads to the risk of serious personal injury
or material damage.
Further information can be found in this documentation.
All transportation, installation and initialisation and maintenance
work must be carried out by qualified personnel (compliant with
IEC 364, CENELEC HD 384, DIN VDE 0100, IEC 664 or DIN
VDE 0110, and national accident prevention regulations).
For the purposes of these basic safety instructions, qualified
personnel are persons who are familiar with the erection,
installation, commissioning and operation of this product and who
have the relevant qualifications for their work.
2. Proper use
Drive power converters are components intended for installation
in electrical systems or machines.
When being installed in machines, the drive power converter
cannot be commissioned (i.e. implementation of the proper use)
until it has been ensured that the machine meets the provisions of
the EC directive 89/392/EEC (machine directive); EN 60204 must
also be complied with.
Commissioning (i.e. implementation of the proper use) is only
permitted when the EMC directive (89/336/EEC) is complied with.
The drive power converters meet the requirements of the low
voltage directive 73/23/EEC. The harmonised standards in prEN
50178/DIN VDE 0160, together with EN 60439-1/VDE 0660 Part
500 and EN 60146/VDE 0558 were applied for the drive power
converter.
Technical data and information for connection conditions can be
found on the rating plate and in the documentation, and must be
complied with.
3. Transport, storage
Information regarding transport, storage and correct handling
must be complied with.
4. Installation
The installation and cooling of the equipment must be
implemented as per the regulations in the corresponding
documentation.
The drive power converter must be protected against
impermissible loads. In particular, no components must be bent
and/or the insulation distances changed during transport and
handling. Touching of electronic components and contacts must
be avoided.
Drive power converters have electrostatically sensitive
components that can be easily damaged by incorrect handling.
Electrical components must not be mechanically damaged or
destroyed (this may cause a health hazard!).
5. Electrical connection
When working on drive power inverters which are connected to
high voltages, the applicable national accident prevention
regulations must be complied with (e.g. VBG 4).
The electrical installation must be implemented as per the
applicable regulations (e.g. cable cross-section, fuses, earth lead
connections). Further information is contained in the
documentation.
Information about EMC-compliant installation – such as shielding,
earthing, location of filters and installation of cables – can be
found in the drive power converter documentation. These
instructions must also always be observed for drive inverters with
CE approval. Compliance with the limit values specified in the
EMC regulations is the responsibility of the manufacturer of the
system or machine.
6. Operation
Systems where drive power converters are installed must be
equipped, where necessary, with additional monitoring and
protective equipment as per the applicable safety requirements,
e.g. legislation concerning technical equipment, accident
prevention regulations, etc. Modifications to the drive power
converter using the operating software are permitted.
After the drive power converter is disconnected from the power
supply, live equipment components and power connections
should not be touched immediately because of possibly charged
capacitors. Comply with the applicable information signs located
on the drive power converter.
All covers must be kept closed during operation.
7. Maintenance and repairs
The manufacturer documentation must be complied with.
These safety instructions must be kept in a safe place!

NORDAC SK 5xxE Manual About this document
4 BU 0500 GB
Documentation
Designation: BU 0500 EN
Mat. No.: 607 50 01
Device series: SK 5xxE (SK 500E, SK 505E, SK 510E, SK 520E, SK 530E, SK 535E)
Version list
Designation of previous
issues Software Version Comments
BU 0500 DE, March 2005 V 1.1 R1 First issue based on BU 0750 DE
BU 0500 DE, May 2005 V 1.1 R2 Revision, supplementation and correction
BU 0500 DE, June 2005 V 1.2 R0 Supplementation and correction P220, additionally
P466/P554 EMC standards
BU 0500 DE, August 2005 V 1.2 R0 Jumper illustration mains/motor, information on array levels
with SK TU3-PAR, P107 lifting gear, P215, P420...425 +
P470 terminal numbers
BU 0500 DE, December 2005 V 1.3 R1 Brake resistance, NED address, Caution hot, output current
2.2kW/230V, P415 process controller, radio interference
suppression level 400V, E13.2 supplemented
BU 0500 DE, May 2006
Mat. No. 607 5001 / 1806
V 1.4 R0 Switchover of nominal voltage/current value is reversed,
Section 2.9 illustration corrected, new parameter P534 Æ
Error 12.1 and 12.2, P513 adjustment range extended.
BU 0500 DE, October 2006
Mat. No. 607 5001 / 4006
V 1.5 R0 115V devices, information on repairs, P218, P400/546=46,
P420-425=3-Wire-Control, P520 fmin, P543=22, P748 -01,
UL-Data Sect 7.5, 3-Wire-Control (Fct. P420-425)
BU 0500 DE, May 2007
Mat. No. 607 5001 / 2207
V 1.6 R0 Note on SK530E integrated, DIP switch 485/CAN, EMV kit,
further details in P744-746, E004 extended to error 4.1,
P217
BU 0500 DE, August 2007
Mat. No. 607 5001 / 3307
V 1.6 R0 UL text, note on functional safety “pulse lock”, P217
vibration damping, P219, value range P414, P418=33,
P420…425=71/72, P509=10, P515, P533, P535 extended,
P551, P552. P557 extended, P559 to 30 sec., P737
extended, parameter overview expanded by P6xx
BU 0500 DE, February 2008
Mat. No. 607 5001 / 0808
V 1.7 R0 External 24V supply (SK 5x5E) CP=Cold Plate version,
push-through technique, SK TU3-POT, KTY-84 function
Section 4.3/P400/405, P551 corrected, evaluate HTL
sensor via DIN (P421/423, P461, P462, P463), P560
correction, E013.2 / E018 corrected
BU 0500 DE, Mai 2008
Mat. Nr. 607 5001 / 2008
V 1.7 R0 RoHS-conform, WAGO-RJ45 terminals, Ri analog input,
P434/441/450/455=18 FI ready, dimensions external heat
sink technology, addresses
Published by
Getriebebau NORD GmbH & Co. KG
Rudolf- Diesel- Str. 1 •D-22941 Bargteheide •Germany •http://www.nord.com/
Telephone [phone] / 401-0 •Fax [phone] / 401-555

NORDAC SK 5xxE Manual About this document
BU 0500 GB 5
Intended use of the frequency inverter
Compliance with the operating instructions is the requirement for error-free operation and the
fulfilment of any warranty claims. You must first read these operating instructions before
working with the device!
These operating instructions contain important information about service. They must therefore
be kept close to the device.
The SK 5xxE frequency inverters are devices for industrial and commercial plants for operating
three-phase asynchronous motors with squirrel-cage rotors. These motors must be suitable for
operation with frequency inverters, other loads must not be connected to the devices.
The frequency inverters SK 5xxE are devices for stationary installation in control cabinets. All
details regarding technical data and permissible conditions at the installation site must be
complied with.
Commissioning (implementation of the intended use) is not permitted until it has been ensured
that the machine complies with the EMC directive 89/336/EEC and that the conformity of the
end product meets the machine directive 89/392/EEC (note EN 60204).
©Getriebebau NORD GmbH & Co. KG, 2008

NORDAC SK 5xxE Manual
6 BU 0500 GB
1 GENERAL INFORMATION...........................................................................................................8
1.1 Overview...................................................................................................................9
1.2 Delivery.................................................................................................................. 10
1.3 Scope of supply ..................................................................................................... 10
1.4 Safety and installation information......................................................................... 11
1.5 Approvals............................................................................................................... 12
1.5.1 European EMC guideline ............................................................................................ 12
1.5.2 UL approval................................................................................................................. 12
1.6 Type code / device design..................................................................................... 13
2 ASSEMBLY AND INSTALLATION ........................................................................................... 14
2.1 Installation.............................................................................................................. 14
2.2 Dimensions ............................................................................................................ 15
2.2.1 SK 5xxE, standard version.......................................................................................... 15
2.2.2 SK 5xxE…-CP in ColdPlate version............................................................................ 16
2.3 Mounting dimensions............................................................................................. 17
2.3.1 SK 5xxE, standard version.......................................................................................... 17
2.3.2 SK 5xxE…-CP in ColdPlate version............................................................................ 18
2.4 EMC- Kit ................................................................................................................ 19
2.5 Brake resistor (BR) ................................................................................................ 20
2.5.1 Electrical data BR ....................................................................................................... 21
2.5.2 Dimensions bottom-mounted BR ................................................................................ 22
2.5.3 Dimensions Chassis BR.............................................................................................. 22
2.6 Wiring guidelines ................................................................................................... 23
2.7 Electrical connection.............................................................................................. 24
2.8 Electrical connection of power unit ........................................................................ 25
2.8.1 Mains supply (X1-PE, L1, L2/N, L3)............................................................................ 26
2.8.2 Multi-function relay (X3 – 1, 2, 3, 4) ............................................................................ 26
2.8.3 Motor cable (X2 - U, V, W, earth)................................................................................ 27
2.8.4 Braking resistor connection (X2 - +B, -B).................................................................... 27
2.8.5 Braking resistor connection (X2 - +B, -B).................................................................... 28
2.8.6 Jumper “A” mains input............................................................................................... 29
2.8.7 Jumper “B” motor output ............................................................................................. 29
2.8.8 Interne Verschaltung der Jumper................................................................................ 30
2.9 Electrical connection of the control unit ................................................................. 30
2.9.1 Terminal blocks...........................................................................................................31
2.9.2 Details of the SK 5x0E control connections ................................................................ 32
2.9.3 Details of the SK 5x5E control connections ................................................................ 36
2.10 Colour and contact assignments for the incremental encoder. ........................... 40
3 DISPLAY AND OPERATION..................................................................................................... 41
3.1 Modular modules ................................................................................................... 41
3.2 Technology unit overview ...................................................................................... 42
3.2.1 SimpleBox, SK CSX-0 ................................................................................................ 43
3.2.2 ControlBox, SK TU3-CTR ........................................................................................... 45
3.2.3 ParameterBox, SK TU3-PAR ...................................................................................... 50
3.2.4 ParameterBox parameters .......................................................................................... 56
3.2.5 ParameterBox error messages ................................................................................... 58
3.2.6 Profibus module, SK TU3-PBR, …-24V...................................................................... 61
3.2.7 CANopen module, SK TU3-CAO ................................................................................ 61
3.2.8 DeviceNet module, SK TU3-DEV................................................................................ 62
3.2.9 InterBus module, SK TU3-IBS .................................................................................... 62
3.2.10 SK TU3-AS1, AS interface ........................................................................................ 63
3.2.11 PotentiometerBox, SK TU3-POT .............................................................................. 63

Table of contents
BU 0500 GB 7
4 COMMISSIONING.......................................................................................................................64
4.1 Factory settings ......................................................................................................64
4.2 Minimum configuration of control connections .......................................................65
4.3 KTY84-130 Connection (software version 1.7 and above) ....................................66
5 PARAMETRIERUNG..................................................................................................................67
5.1 Operating display....................................................................................................69
5.2 Basic parameters....................................................................................................71
5.3 Motor / characteristic curve parameters.................................................................76
5.4 Control parameters.................................................................................................82
5.5 Control terminals ....................................................................................................85
5.6 Additional parameters ..........................................................................................103
5.7 Positioning ............................................................................................................114
5.8 Information............................................................................................................114
5.9 Parameter monitoring, User settings....................................................................121
6 ERROR MESSAGES................................................................................................................128
6.1 SimpleBox / ControlBox display ...........................................................................128
6.2 Table of possible error messages ........................................................................128
7 TECHNICAL DATA...................................................................................................................133
7.1 SK 5xxE general data...........................................................................................133
7.2 Electrical data 115V..............................................................................................134
7.3 Electrical data 230V..............................................................................................135
7.4 Electrical data 400V..............................................................................................136
7.5 Electrical data for UL certification.........................................................................137
7.6 General conditions for ColdPlate technology .......................................................139
7.7 External heat sink kit ............................................................................................141
8 ADDITIONAL INFORMATION..................................................................................................144
8.1 Setpoint processing in the SK 5xxE .....................................................................144
8.2 Process controller.................................................................................................146
8.2.1 Process controller application example ..................................................................... 146
8.2.2 Process controller parameter settings ....................................................................... 147
8.3 Electromagnetic compatibility (EMC) Abbreviation: EMC)...............................148
8.4 EMC limit value classes .......................................................................................148
8.5 Reduced output power .........................................................................................150
8.5.1 Increased heat dissipation due to pulse frequency ................................................... 150
8.5.2 Reduced overcurrent due to time .............................................................................. 151
8.5.3 Reduced overcurrent due to output frequency .......................................................... 152
8.5.4 Reduced output current due to mains voltage........................................................... 153
8.5.5 Reduced output current due to the heat sink temperature ........................................ 153
8.6 Operation with FI circuit breakers.........................................................................153
8.7 Maintenance and servicing information................................................................155
9 KEYWORD INDEX....................................................................................................................156
10 REPRESENTATIVES / BRANCHES......................................................................................158

NORDAC SK 5xxE Manual
8 Subject to technical alterations BU 0500 GB
1 General information
The NORDAC SK 5xxE is based on the tried and tested Nord platform. These devices feature a compact
design with optimum control characteristics.
These devices are provided with sensorless vector current control system which in combination with
asynchronous three-phase motor types constantly ensures an optimised voltage-to-frequency ratio. This has
the following significance for the drive: Peak start-up and overload torques at constant speed.
This series of devices can be adapted to individual requirements by means of the modular technology boxes.
Due to the numerous setting options, these inverters are capable of controlling all three-phase motors. The
power range is from 0.25kW to 7.5kW with integrated mains filter.
This manual is based on the device software V1.7 R0 (see. P707) of SK 5xxE. If the frequency inverter used
has a different version, this may lead to some differences. If necessary, you can download the current manual
from the Internet (http://www.nord.com/).
For the SK 51xE/53xE there are additional descriptions for the functional safety (BU 0530) and the positioning
system (BU 0510). These contain all the necessary additional information for start-up.
If a bus system is used for communication, a corresponding description (BU 0020…BU 0090) is provided, or
this can be downloaded from the Internet (http://www.nord.com/).
In the standard version the device has a fixed cooling element, which causes corresponding heat dissipation if
it is installed in a control cabinet. In order to achieve less heat dissipation in the control cabinet or to enable a
smaller size, there are the following possibilities:
ColdPlate-Technology
Instead of a cooling element/fan, ColdPlate versions of the frequency inverter have a flat metal plate on the
rear side which is mounted on an existing mounting plate (e.g. the rear wall of the control cabinet) so as to
provide thermal conduction. The mounting surface can also be provided with a flow of cooling medium (water.
oil), which enables a better heat dissipation than air due to its greater thermal conductivity. Because the heat
dissipation does not take place in the control cabinet, the temperature of the interior remains considerably
lower, which results in a longer life span of the power electronics. The installation depth is also reduced and
the possible failure of the frequency inverter due to clogged air filters is avoided.
External heat sink technology
External heat sink technology is an optional supplement for ColdPlate devices. This is used if an external
cooling system is provided, but no liquid-cooled mounting plate is available. A cooling element is mounted on
the ColdPlate device, which passes through an opening in the rear panel of the control cabinet into the exterior
air-cooled environment. Convection takes place outside of the control cabinet, which results in the same
advantages as with ColdPlate technology.

1 General information
BU 0500 GB Subject to technical alterations 9
1.1 Overview
Properties of the basic device SK 500E:
•High starting torque and precise motor speed control setting with sensorless current vector control.
•Can be mounted next to each other without additional spacing
•Permissible ambient temperature range 0 to 50°C (please refer to the technical data)
•Integrated EMV mains filter for limit curve A1 as per EN55011 (not for 115V devices)
•Automatic measurement of the stator resistance or determination of the precise motor data
•Programmable direct current braking
•Integrated brake chopper for 4 quadrant operation (optional brake resistors)
•5 digital inputs, 2 Analogue inputs, 2 relay messages, 1 analogue output
•Four separate online switchable parameter sets
•RS232/485 interface via RJ12 plug
Additional features of the SK 510E compared with the SK 500E:
•Functional safety – secure pulse block (Handbook BU 0530)
Additional features of the SK 520E compared with the SK 500E:
•2 x CANbus/CANopen interfaces via RJ45 plug (Handbook BU 0060)
•RS485 interface additionally via terminals
•2 x digital inputs and 2 x digital outputs
•Speed feedback by means of incremental rotation encoder input
Additional features of the SK 530E compared with the SK 500E:
•Integrated Posicon positioning control (Handbook 0510)
•CANopen absolute value encoder evaluation
•Functional safety – secure pulse block (Handbook BU 0530)
Differing features of the SK 5x5E compared with SK 5xxE:
•External 24V supply voltage (included in handbook BU 0500), communication with the device can be
performed even with out power supply.
Differing features of the SK 5xxE-…-CP compared with SK 5xxE:
•ColdPlate or external heat sink technology (included in Handbook BU 0500)
NOTE: The features of the particular basic unit are different in the SK 5xxE series. These differences will
be pointed out in the course of this description (Section 2.9).

NORDAC SK 5xxE Manual
10 Subject to technical alterations BU 0500 GB
1.2 Delivery
Check the equipment immediately after delivery/unpacking for transport damage such as deformation or loose
parts.
If there is any damage, contact the carrier immediately and implement a thorough assessment.
Important! This also applies even if the packaging is undamaged.
1.3 Scope of supply
Standard design: IP20
Integrated brake chopper
Integrated EMV mains filter for limit curve A1 as per EN55011
(not for 115V devices)
Blanking cover for technology unit slot
Screening terminal for control terminals
Covering for the control terminals
Operating manual
Available accessories: Braking resistor, for energy feedback (Section 2.5.)
Interface converter RS232 →RS485 (additional description BU 0010)
NORD CON, PC parameterising software > www.nord.com <
ePlan macros for producing electrical circuit diagrams > www.nord.com <
EMC Kit (SK EMC 2-1, SK EMC 2-2) Section. 2.4
Technology unit,
Section 3.2: SK CSX-0, SimpleBox,
removable operating panel, 4 digit 7 segment LED display, single button control
SK TU3-CTR, ControlBox,
detachable operating panel, 4 figure 7 segment LED display, keyboard
SK TU3-PAR, ParameterBox,
removable control panel, multi-line plain language LCD display, keyboard
SK TU3-PBR, Profibus, additional unit for Profibus communication (1.5Mbaud)
SK TU3-PBR-24V, with external 24V supply(12Mbaud)
SK TU3-CAO, CANopen, bus switch-on
SK TU3-DEV, DeviceNet, Bus switch-on
SK TU3-IBS, InterBus, Bus switch-on
SK TU3-AS1, AS interface
SK TU3-POT, PotentiometerBox,
removable control panel for control with a potentiometer and two buttons
NOTE: Additional BUS descriptions are available (BU 0020… BU 0090)
> www.nord.com

1 General information
BU 0500 GB Subject to technical alterations 11
1.4 Safety and installation information
NORDAC SK 5xxE frequency inverters are equipment for use in industrial high voltage systems and are
operated at voltages that could lead to severe injuries or death if they are touched.
•Installation and other work may only be carried out by qualified electricians and when the device is
disconnected. The manual must always be available for these persons and must be complied with.
•Local regulations for the installation of electrical equipment as well as for accident prevention must
be complied with.
•The equipment continues to carry hazardous voltages for up to 5 minutes after being switched off
at the mains.
•For single phase operation (230V) the mains impedance must be at least 100μH for each
conductor. If this is not the case, a mains choke must be installed.
•For safe isolation from the mains, all poles of the supply cable to the frequency inverter must be
able to be disconnected.
•Even during motor standstill (e.g. caused by a release block, blocked drive or output terminal short
circuit), the line connection terminals, motor terminals and braking resistor terminals may still
conduct hazardous voltages. A motor standstill is not identical to galvanic isolation from the mains.
•Attention, even parts of the control card and, in particular, the connection plug for the removable
technology units can conduct hazardous voltages. The control terminals are mains voltage free.
•Warning, under certain settings the inverter can start automatically after the mains are switched on.
•The frequency inverter is only intended for permanent connection and may not be operated without
effective earthing connections that comply with local regulations for large leak currents (> 3.5mA).
VDE 0160 requires the installation of a second earthing conductor or an earthing conductor cross-
section of at least 10 mm2.
•Normal FI-circuit breakers are not suitable as the sole protection in three-phase frequency
inverters when local regulations do not permit a possible DC proportion in the faulty current. The FI
circuit breaker must be an all-mains sensitive FI circuit breaker (type B) as per EN 50178 / VDE
0160.
•In normal use, NORDAC 5xxE frequency inverters are maintenance free. The cooling surfaces
must be regularly cleaned with compressed air if the ambient air is dusty.
CAUTION
The heat sink and all other metal components can heat up to temperatures above
70°C.
When mounting, sufficient distance from neighbouring components must be
maintained. When working on the components, allow sufficient cooling time beforehand
ATTENTION
DANGER TO LIFE!
The power unit can continue to carry voltages for up to 5 minutes after being switched
off at the mains. Inverter terminals, motor cables and motor terminals may carry
voltage!
Touching open or free terminals, cables and equipment components can lead to
severe injury or death!
Work may only be carried out by qualified specialist electricians and with the electrical
supply to the equipment disconnected!

NORDAC SK 5xxE Manual
12 Subject to technical alterations BU 0500 GB
CAUTION
•Children and the general public must be kept away from the equipment!
•The equipment may only be used for the purpose intended by the manufacturer.
Unpermitted modifications and the use of spare parts and additional equipment that
has not be bought from or recommended by the equipment manufacturer can lead to
fire, electric shock and injury.
•Keep these operating instructions in an accessible location and give these to every
operator!
WARNING
This product is covered under marketing classification IEC 61800-3. In a domestic
environment, this product can cause high frequency interference, which may require the
user to take appropriate measures.
An appropriate measure would be the inclusion of a recommended line filter.
1.5 Approvals
1.5.1 European EMC guideline
If the NORDAC SK 5xxE is installed according to the recommendations in this instruction manual, it meets all
EMC directive requirements, as per the EMC product standard for motor-operated systems EN 61800-3.
(See also Section. 8.3 Electromagnetic compatibility [EMC].)
1.5.2 UL approval -File No. E171342
“Suitable for use on a circuit capable of delivering not more than
5000 rms symmetrical Amperes, 120 Volts maximum (SK 5xxE-xxx-
112), 240 Volts maximum (SK 5xxE-xxx-323), or 480 Volts maximum
(SK 5xxE-xxx-340), or 500 Volts maximum (SK 5xxE-xxx-350) and
when protected by J class fuses as indicated.”
Suitable for use with mains with a maximum short circuit current of
5000A (symmetrical), 120V maximum (SK 5xxE-xxx-112), 240V maximum (SK 5xxE-xxx-323), or 480V
maximum (SK 5xxE-xxx-340), or 500V maximum (SK 5xxE-xxx-350) and with protection with a J-class fuse as
described in BU 0500 DE Section 7.5.
NORDAC SK 5xxE frequency inverters have a motor overload protection. Further technical details can be
found in Section 7.5.
1.5.3 RoHS-conform
The frequency inverters in the series SK 5xxE have been designed RoHS-conform in
compliance with directive 2002/95/EC since the third quarter of 2007.
The option modules will also be RoHS-conform in design from the 4th quarter of 2008.

1 General information
BU 0500 GB Subject to technical alterations 13
1.6 Type code / device design
SK 500E-250-323-A-CP
Versions: CP = “ColdPlate” or “External heat sink technology”
Radio interference filter class: O = without, A or B limit value
Mains voltage: x12 = 115V, x23 = 230V, x40 = 400V
Number of mains phases: 1 = single phase, 3 = 3-phase *
Digits before comma for power: 0 = 0.xx, 1 = 0x.x0, 2 = 0xx.0
Device nominal power (xx): 25 = 0.25kW, 37 = 0.37kW, ... 75 = 7.5kW
Device series: SK 500E / SK 505E / SK 510E / SK 520E / SK 530E / SK 535E
*) designation 3 also includes combined devices which are intended for
single and three-phase operation (please refer to the technical data)
optionale
Technologiebox
Wall mount bracket
Analogue and digital
control terminals
Encoder input
only SK 52x/53xE
Additional terminals
only SK 52x/53xE
Optional EMC Kit
Screening angle and clips

NORDAC SK 5xxE Manual
14 Subject to technical alterations BU 0500 GB
2 Assembly and installation
2.1 Installation
NORDAC SK 5xxE frequency inverters are available in various sizes depending on the output. Attention must
be paid to a suitable position when installing.
The equipment requires sufficient ventilation to protect against overheating. For this the minimum guideline
distances from adjacent components above and below the frequency inverter, which could obstruct the air flow
apply. (above > 100 mm, below > 100 mm)
Distance from device: Mounting can be immediately next to each other. However, for the use of brake
resistances mounted below the device (not possible with …-CP devices), the greater width (Section 2.5) must
be taken into consideration, particularly in combination with temperature switches on the brake resistor!
Installation position The installation position is normally vertical. It must be ensured that the cooling ribs on
the rear of the device are covered with a flat surface to provide good convection.
≥100mm
≥100mm
Warm air must be vented above the device!
If several inverters are arranged above each other, ensure that the upper air entry temperature limit is not
exceeded. (see also Section 7, Technical Details). If this is the case, it is recommended that an "obstacle" (e.g.
a cable duct) is mounted between the inverters so that the direct air flow (rising warm air) is impeded.
Heat dissipation: If the device is installed in a control cabinet, adequate ventilation must be ensured. The
heat dissipation in operation is approx. 5% (according to the size and equipment of the device) of the rated
power of the frequency inverter.

2 Assembly and installation
BU 0500 GB Subject to technical alterations 15
2.2 Dimensions
2.2.1 SK 5xxE, standard version
Housing dimensions Wall-mounting (Sect. 2.3.1)
Device type
Size
ABCD∅
Weight
approx.
[kg]
SK 5xxE-250- …
SK 5xxE-750- … S1 186 74 * 153 220 5.5 1.4
SK 5xxE-111- …
SK 5xxE-221- … S2 226 74 * 153 260 5.5 1.8
SK 5xxE-301- …
SK 5xxE-401- … S3 241 98 181 275 5.5 2.7
SK 5xxE-551- …
SK 5xxE-751- … S4 286 98 181 320 5.5 3.1
All dimensions in [mm]
*) for the use of brake resistors mountede below
the device = 88 mm (Section 2.5)
B
A
C

NORDAC SK 5xxE Manual
16 Subject to technical alterations BU 0500 GB
2.2.2 SK 5xxE…-CP in ColdPlate version
Housing dimensions Wall mounting
Device type
Size
ABCD∅
Weight
approx.
[kg]
SK 5xxE-250- …-CP
SK 5xxE-750- …-CP S1 182 95 119 1.3
SK 5xxE-111- …-CP
SK 5xxE-221- …-CP S2 222 95 119 1.6
SK 5xxE-301- …-CP
SK 5xxE-401- …-CP S3 237 120 119 1.9
SK 5xxE-551- …-CP
SK 5xxE-751- …-CP S4 282 120 119
Mounting details
in Section 2.3.2
2.3
All dimensions in [mm]
Brake resistors cannot be directly mounted below
–CP devices (Section 2.5)
A
C
B

2 Assembly and installation
BU 0500 GB Subject to technical alterations 17
2.3 Mounting dimensions
2.3.1 SK 5xxE, standard version
2 brackets are supplied for the wall mounting of the SK 5xxE. These are inserted into the cooling element at
the rear of the device as shown in the illustration. For this, no further accessories are needed.
Alternatively, the wall mounting brackets can be inserted at the side of the cooling element in order to minimise
the necessary depth of the control cabinet.
In general, care must be taken that the rear of the cooling element is covered with a flat surface and that the
device is mounted vertically. This enables optimum convection, which ensures fault-free operation.
B
A
D
Section
2.2.1

NORDAC SK 5xxE Manual
18 Subject to technical alterations BU 0500 GB
2.3.2 SK 5xxE…-CP in ColdPlate version
According to the size of the frequency inverter, the dimensions for the drilling pattern listed below must be
observed.
Size Height H h1 h2 Width W kuDepth of the
Cold Plate
S1 182 91 -
S2 222 111 -
95
S3 237 75.33 75.33
S4 282 90.33 95.83
120
5.5 10
All dimensions in [mm]
Ø 4,5mm
k
B
u
Sizes 3 + 4
h1
h2
H
Ø 4,5mm
k
B
u
H
h1
Sizes 1 + 2

2 Assembly and installation
BU 0500 GB Subject to technical alterations 19
2.4 EMC- Kit
For optimum EMC-compliant wiring, the optional EMC Kit must be used. This includes a screening angle and
two hammer clips.
The EMC Kit provides the possibility of attaching the screening of the motor cable to a large surface of the
frequency inverter (interference source). If necessary a screened brake resistor cable can be attached with the
two hammer clips.
The screening angle is attached to the two housing screws on the lower edge (below the U-V-W terminals).
The motor cable screening is earthed to a large area of the screening angle by means of the hammer clip.
Device type Size EMC- Kit
SK 5xxE-250- … SK 5xxE-750- S1
SK 5xxE-111- … SK 5xxE-221- S2
SK EMC 2-1
Mat. No. 275999011
SK 5xxE-301- … SK 5xxE-401- S3
SK 5xxE-551- … SK 5xxE-751- S4
SK EMC 2-2
Mat. No. 275999021
Note: The EMC Kit cannot be combined with ...-CP (ColdPlate) devices. Any cable screening must be
earthed to a large area of the mounting surface.

NORDAC SK 5xxE Manual
20 Subject to technical alterations BU 0500 GB
2.5 Brake resistor (BR)
During dynamic braking (frequency reduction) of a three phase motor, electrical energy is returned to the
frequency inverter. In order to avoid an overvoltage switch-off of the frequency inverter, an external brake
resistor can be used. With this, the integrated brake chopper (electronic switch) pulses the intermediate circuit
voltage (switching wave approx. 420V/720V DC, according to the mains voltage) to the brake resistor. Here
the excess energy is converted into heat.
CAUTION
The braking resistance and all other metal components can heat up to temperatures
above 70°C.
When mounting, sufficient distance from neighbouring components must be
maintained. When working on the components, allow sufficient cooling time beforehand
For inverter powers up to 2.2kW a standard bottom-mounted resistor (SK BR4-…IP40) can be used. This can
additionally be equipped with an optional temperature switch (bi-metal, switching point 180°C), in order to
indicate an overload. The fixing material in the side groove is enclosed. The resistor and the temperature
switch are connected by means of flexible stranded conductors. Approval: UL, cUL
Note: Brake resistors cannot be directly mounted below –CP (ColdPlate) devices.
SK BR4-... Size SK BR4-... Size
Chassis resistors (SK BR2-…, IP00) are available for frequency inverters from 3kW to 7.5kW. These must be
mounted in the control cabinet, close to the frequency inverter. There is a temperature switch on the braking
resistor to provide protection against overload. Connection of the resistor and the temperature switch is by
means of screw terminals. Approval: UL, cUL
SK BR2-... Size SK BR2-... Size