nord NORDAC PRO SK 500E Series User manual

EN
BU 0505
SK 54xE
Users Manual for Frequency Inverters

SK 54xE – Users Manual for Frequency Inverters
2 BU 0505 EN-3021
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Safety and usage instructions for electronic drive technology
(drive power controller, motor starter 1) and field distributor)
(in accordance with: Low Voltage Directive 2006/95/EC (as of 20.04.2016: 2014/35/EU))
1. General
The devices may have live, bare, moving or rotating parts or hot
surfaces during operation, depending on their protection class.
Unauthorised removal of covers, improper use,
incorrect installation or
operation causes a risk of serious personal injury or material damage.
Further information can be found in this documentation.
All transportation, installation commissioning and maintenance work
must be carried out by qualified personnel (compliant with IEC
364 or
CENELEC HD 384 or DIN VDE 0100 and 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 asse
mbly, installation,
commissioning and operation of this product and who have the relevant
qualifications for their work.
2. Proper use in Europe
The devices are components intended for installation in electrical
systems or machines.
When the devices are installed in machines, they must not be started up
(i.e. commencement of use for intended purpose) until it has been
ensured that the machine meets the provisions of the EC Directive
2006/42/EC (Machinery Directive); EN 60204 must also be complied
with.
Star
ting up (i.e. commencement of use for intended purpose) is only
permitted if EMC directive (2004/108/EC (as of 20.04.2016:
2014/30/EU)) has been complied with.
CE-labelled devices fulfil the requirements of the Low Voltage Directive
2006/95/EC (as of 20.04.2016:
2014/35/EU). The stated harmonized
standards for the devices are used in the declaration of conformity.
Technical data and information for connection conditions can be found
on the rating plate and in the documentation, and must be complied
with.
The devices may only be used for safety functions which are described
and explicitly approved.
3. Transport, storage
Information regarding transport, storage and correct handling must be
complied with.
4. Installation
The installation and cooling of the equ
ipment must be implemented
according to the regulations in the corresponding documentation.
The devices must be protected against impermissible loads.
Especially during transport and handling, components must not
be deformed and/or insulation distances must not be changed.
Touching of electronic components and contacts must be
avoided.
The devices contain electrostatically sensitive components,
which can be easily damaged by incorrect handling. Electrical
components must not be me
chanically damaged or destroyed
(this may cause a health hazard!).
5. Electrical Connection
When working on live devices, the applicable national accident
prevention regulations must be complied with (e.g. BGV A3,
formerly VBG 4).
The electrical installation must be implemented according to the
applicable regulations (e.g. cable cross-
section, fuses, earth
lead connections). Further instructions can be found in the
documentation.
Information regarding EMC-
compliant installation (such as
shielding, earthing, location of filters and routing of cables) can
be found in the documentation for the devices. CE marked
devices must also comply with these instructions. Compliance
with the limit values specified in the EMC regulations is the
responsibility of the manufacturer of the system or machine.
6. Operation
Where necessary, systems in which the devices are installed
must be equipped with additional monitoring and protective
equipment according to the applicable safety requirements, e.g.
legislation concerning technical equipment, accident prevention
regulations, etc.
The parametrisation and configuration of the devices must be
selected so that no hazards can occur.
All covers must be kept closed during operation.
7. Maintenance and repairs
Live equipment components and power connections should not
be touched immediately after disconnecting the devices from
the power supply because of possible charged capacitors.
Observe the applicable information signs located on the device.
Further information can be found in this documentation.
These safety instructions must be kept in a safe place!
1) Direct starter, soft starter, reversing starter
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Intended use of the frequency inverter
BU 0505 EN-3021 3
Intended use of the frequency inverter
Compliance with the operating instructions is necessary for fault-free operation
and the acceptance of any warranty claims. These operating instructions must
be read before working with the device!
These operating instructions contain important information about servicing.
They must therefore be kept close to the device.
SK 500E series frequency inverters are devices for industrial and commercial
systems used for the operation of three-phase asynchronous motors with squirrel-
cage rotors and Permanent Magnet Synchronous Motors – PMSM. These motors
must be suitable for operation with frequency inverters, other loads must not be
connected to the devices.
SK 5xxE frequency inverters 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 (commencement of the intended use) is not permitted until it has
been ensured that the machine complies with the EMC Directive 2004/108/EEC
(from 04/20/2016: 2014/30/EU) and that the conformity of the end product meets
the Machinery Directive 2006/42/EEC (observe EN 60204).
Getriebebau NORD GmbH & Co. KG, 2016
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Documentation
Name: BU 0505
Part No.: 6075052
Series: SK 500E
Device series: SK 540E / SK 545E
FI types: SK 5xxE-250-112- ... SK 5xxE-750-112- (0.25 – 0.75kW, 1~ 115V, output 3~ 230V)
SK 5xxE-250-323- ... SK 5xxE-221-323- 0.25 - 2.2kW, 1/3~ 230V, output 3~ 230V)
SK 5xxE-301-323- ... SK 5xxE-182-323- (3.0 – 18.5kW, 3~ 230V, output 3~ 230V)
SK 5xxE-550-340- ... SK 5xxE-163-340- (0.55 – 160.0kW, 3~ 400V, output 3~ 400V)

SK 54xE – Users Manual for Frequency Inverters
4 BU 0505 EN-3021
Version list
Title,
Date
Order number Device
software
version
Remarks
BU 0505,
March 2013
6075052 / 1013
V 2.0 R5
First issue.
Further revisions:
February 2015
(For an overview of the amendments to the above editions: please refer to the February 2015 version
(Part No.: 6075052/0715))
BU 0505,
April 2016
6075052 /1516
V 2.3 R0
Including:
• General corrections
•
Adaptation of parameters: P220, 241, 244, 312,
315, 334, 504, 513, 520, 748
• Error message I000.8 and I000.9 added
• Revision of "Standards and Approvals" section
• Revision of section "UL/cUL"
– for CSA: Voltage limitation filter (SK CIF) no
longer required Module removed from
document
– Size10 and 11: Note "in progress" deleted,
amendment of fuses
• Revision of the "Technical / Electrical Data", size 10
and 11 Amendment of fuses (types and sizes)
• Update of EC/EU Declaration of Conformity
•
Revision of the section "General conditions for
ColdPlate technology"
BU 0505,
July 2021
6075052 / 3021
V 2.3 R0
• Update “Standards and approvals”
• Update of EU Declaration of Conformity
• Addition of the energy efficiency levels according to
the EU Ecodesign Regulation 1781
Table 1: Version list
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Copyright notice
As an integral component of the device described here, this document must be provided to all
users in a suitable form.
Any editing or amendment or other utilisation of the document is prohibited.
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Publisher
Getriebebau NORD GmbH & Co. KG
Getriebebau-Nord-Straße 1 • 22941 Bargteheide, Germany • http://www.nord.com/
Fon +49 (0) 45 32 / 289-0 • Fax [phone]
=== Ende der Liste für Textmarke Copyr ight ===

Publisher
BU 0505 EN-3021 5

SK 54xE – Users Manual for Frequency Inverters
6 BU 0505 EN-3021
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Table of Contents
=== Ende der Liste für Textmarke Inhal tsverzeichnis ===
1General................................................................................................................................................................ 10
1.1 Overview ..........................................................................................................................................................10
1.2 SK 5xxE with or without integrated mains filter...............................................................................................12
1.2.1 Operation of an SK 5xxE-…-A frequency inverter ..............................................................................12
1.2.2 Operation of an SK 5xxE-…-O frequency inverter..............................................................................12
1.2.3 Which type of inverter should be used?............................................................................................13
1.3 Delivery ............................................................................................................................................................13
1.4 Scope of supply ................................................................................................................................................13
1.5 Safety and installation notes ............................................................................................................................18
1.5.1 Explanation of labels used.................................................................................................................19
1.5.2 List of safety and installation notes...................................................................................................19
1.6 Standards and approvals ..................................................................................................................................21
1.7 UL and cUL (CSA) approval ...............................................................................................................................21
1.8 Type code / nomenclature ...............................................................................................................................27
1.8.1 Type plate..........................................................................................................................................28
1.8.2 Frequency inverter type code ...........................................................................................................28
1.8.3 Optional technology units (module type codes) ...............................................................................28
2Assembly and installation .................................................................................................................................... 29
2.1 SK 5xxE, standard version.................................................................................................................................30
2.2 SK 5xxE…-CP in ColdPlate version.....................................................................................................................31
2.3 External heat sink kit ........................................................................................................................................32
2.4 Snap-on mounting rail kit SK DRK1-…...............................................................................................................34
2.5 EMC Kit .............................................................................................................................................................35
2.6 Brake resistor (BR)............................................................................................................................................36
2.6.1 Electrical data for brake resistors......................................................................................................37
2.6.2 Dimensions of bottom-mounted BR SK BR4......................................................................................38
2.6.3 Dimensions of chassis BR SK BR2.......................................................................................................40
2.6.4 Brake resistor assignments................................................................................................................40
2.6.5 Combination of brake resistors .........................................................................................................41
2.6.6 Monitoring of the brake resistor .......................................................................................................44
2.6.6.1 Monitoring with a temperature switch 44
2.6.6.2 Monitoring with current measurement and calculation 44
2.7 Chokes ..............................................................................................................................................................45
2.7.1 Mains chokes.....................................................................................................................................45
2.7.1.1 Link circuit choke SK DCL- 45
2.7.1.2 Input choke SK CI1-… 46
2.7.2 Output choke SK CO1 ........................................................................................................................47
2.8 Line filter ..........................................................................................................................................................49
2.8.1 Mains filter SK NHD (up to size 4)......................................................................................................49
2.8.2 Mains filter SK LF2 (size 5 - 7) ............................................................................................................49
2.8.3 Line filter SK HLD ...............................................................................................................................50
2.9 Electrical connection ........................................................................................................................................51
2.9.1 Wiring guidelines...............................................................................................................................52
2.9.2 Adaptation to IT networks.................................................................................................................53
2.9.3 DC-coupling .......................................................................................................................................55
2.9.4 Electrical connection of power unit...................................................................................................58
2.9.5 Electrical connection of the control unit ...........................................................................................60
2.10 Colour and contact assignments for encoders .................................................................................................73
2.11 RJ45 WAGO- Connection module.....................................................................................................................76
3Displays and control............................................................................................................................................. 77
3.1 Modular assemblies SK 5xxE ............................................................................................................................77
3.2 Overview of technology units...........................................................................................................................78
3.3 SimpleBox, SK CSX-0.........................................................................................................................................80
3.3.1 PotentiometerBox, SK TU3-POT ........................................................................................................83
3.4 Connection of multiple device to a parameterisation tool...............................................................................84
4Commissioning .................................................................................................................................................... 85
4.1 Factory settings ................................................................................................................................................85

Table of Contents
BU 0505 EN-3021 7
4.2 Selecting the operating mode for motor control .............................................................................................86
4.2.1 Explanation of the operating modes (P300)......................................................................................86
4.2.2 Overview of control parameter settings ...........................................................................................87
4.2.3 Motor control commissioning steps..................................................................................................88
4.3 Minimal configuration of control connections .................................................................................................89
4.4 KTY84-130 connection (above software version 1.7).......................................................................................90
4.5 Frequency addition and subtraction via operating boxes ................................................................................91
5Parameters .......................................................................................................................................................... 92
6Operating status messages ................................................................................................................................ 164
6.1 Display of messages .......................................................................................................................................164
6.2 Messages........................................................................................................................................................165
7Technical data.................................................................................................................................................... 173
7.1 General Data SK 500E .....................................................................................................................................173
7.2 Technical data for determining the energy efficiency level ...........................................................................175
7.3 Electrical data .................................................................................................................................................177
7.3.1 Electrical data 115 V ........................................................................................................................177
7.3.2 Electrical data 230 V ........................................................................................................................178
7.3.3 Electrical data 400 V ........................................................................................................................181
7.4 General conditions for ColdPlate technology.................................................................................................186
8Additional information ...................................................................................................................................... 189
8.1 Setpoint processing ........................................................................................................................................189
8.2 Process controller...........................................................................................................................................191
8.2.1 Process controller application example...........................................................................................191
8.2.2 Process controller parameter settings ............................................................................................192
8.3 Electromagnetic compatibility (EMC).............................................................................................................193
8.3.1 General Provisions...........................................................................................................................193
8.3.2 EMC evaluation ...............................................................................................................................193
8.3.3 EMC of device..................................................................................................................................194
8.3.4 EC Declaration of Conformity ..........................................................................................................197
8.4 Reduced output power...................................................................................................................................198
8.4.1 Increased heat dissipation due to pulse frequency.........................................................................198
8.4.2 Reduced overcurrent due to time ...................................................................................................198
8.4.3 Reduced overcurrent due to output frequency ..............................................................................199
8.4.4 Reduced output current due to mains voltage................................................................................200
8.4.5 Reduced output current due to the heat sink temperature............................................................201
8.5 Operation with FI circuit breakers..................................................................................................................201
8.6 Energy Efficiency ............................................................................................................................................201
8.7 Standardisation of setpoint / target values....................................................................................................202
8.8 Definition of setpoint and actual value processing (frequencies) ..................................................................203
9Maintenance and servicing information............................................................................................................. 204
9.1 Maintenance Instructions ..............................................................................................................................204
9.2 Service notes ..................................................................................................................................................205
9.3 Abbreviations .................................................................................................................................................206

SK 54xE – Users Manual for Frequency Inverters
8 BU 0505 EN-3021
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List of illustrations
=== Ende der Liste für Textmarke Abbil dungsverzeichni s ===
Fig. 1 Mounting distances for SK 5xxE.................................................................................................................. 29
Fig. 2: EMC Kit SK EMC2-x................................................................................................................................. 35
Fig. 3: Bottom-mounted brake resistor SK BR4-.................................................................................................... 36
Fig. 4: chassis brake resistor SK BR2-.................................................................................................................. 36
Fig. 5: Illustration of mounting the BR4- on the frequency inverter........................................................................ 38
Fig. 6: Typical brake resistor connections ............................................................................................................. 43
Fig. 7 Diagram of a DC-coupling ........................................................................................................................... 56
Fig. 8 Diagram of a DC coupling with an input/feedback unit ................................................................................ 57
Fig. 9: Modular assemblies SK 5xxE..................................................................................................................... 77
Fig. 10 SimpleBox SK CSX-0................................................................................................................................ 80
Fig. 11 Top side of FI with RJ12 / RJ45 connection ............................................................................................. 81
Fig. 12: SimpleBox, SK CSX-0 menu structure ..................................................................................................... 82
Fig. 13 Motor type plate......................................................................................................................................... 85
Fig. 14: Setpoint processing................................................................................................................................ 190
Fig. 15: Process controller flow diagram.............................................................................................................. 191
Figure 16: Wiring recommendation...................................................................................................................... 196
Figure 17: Heat losses due to pulse frequency.................................................................................................... 198
Figure 18: Output current due to mains voltage................................................................................................... 200
Figure 19: Energy efficiency due to automatic flux optimisation.......................................................................... 201

List of tables
BU 0505 EN-3021 9
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List of tables
=== Ende der Liste für Textmarke Tabel lenverzeichnis == =
Table 1: Version list................................................................................................................................................. 4
Table 2: Overview of SK 500E performance grading features............................................................................... 11
Table 3: Overview of differing hardware features.................................................................................................. 11
Table 4: Standards and approvals......................................................................................................................... 21
Table 5: EMC Kit SK EMC2-x.............................................................................................................................. 35
Table 6: Electrical data for brake resistor SK BR2-… and SK BR4-… .................................................................. 37
Table 7: Brake resistor temperature switch data ................................................................................................... 38
Table 8: Dimensions of bottom-mounted brake resistor SK BR4-... ...................................................................... 38
Table 9: Dimensions of chassis brake resistor SK BR2-... .................................................................................... 40
Table 10: Combination of standard brake resistors............................................................................................... 43
Table 11: Link circuit choke SK DCL-.................................................................................................................... 45
Table 12: Input choke data for SK CI1-..., 1~ 240 V.............................................................................................. 46
Table 13: Input choke data for SK CI1-..., 3~ 240 V.............................................................................................. 46
Table 14: Input choke data for SK CI1-..., 3~ 480 V.............................................................................................. 47
Table 15: Output choke data for SK CO1-..., 3~ 240 V ......................................................................................... 48
Table 16: Output choke data for SK CO1-..., 3~ 480 V ......................................................................................... 48
Table 17: Mains filter NHD-... ................................................................................................................................ 49
Table 18: Mains filter LF2-..................................................................................................................................... 49
Table 19: Mains filter HLD-.................................................................................................................................... 50
Table 20: Adaptation of integrated mains filter ...................................................................................................... 53
Table 21: Tools...................................................................................................................................................... 58
Table 22: Connection data .................................................................................................................................... 58
Table 23: Colour and contact assignments for NORD – TTL / HTL incremental encoders.................................... 74
Table 24: Colour and contact assignment for SIN/COS encoders......................................................................... 74
Table 25: Signal details for SIN/COS encoders..................................................................................................... 75
Table 26: Signal details for Hiperface encoders.................................................................................................... 75
Table 27: Colour and contact assignment for Hiperface encoders........................................................................ 76
Table 28: RJ45 WAGO connection module........................................................................................................... 76
Table 29: Overview of Technology Units and Control Boxes................................................................................. 78
Table 30: Overview of Technology Units and Bus Systems .................................................................................. 79
Table 31: Overview of technology units, other optional modules........................................................................... 79
Table 32: SimpleBox SK CSX-0, functions............................................................................................................ 81
Table 33: Technical data, ColdPlate 115V devices ............................................................................................. 186
Table 34: Technical data, ColdPlate 230V devices, single phase operation ....................................................... 186
Table 35: Technical data, ColdPlate 230V devices, three phase operation......................................................... 187
Table 36: Technical data, ColdPlate 400V devices ............................................................................................. 187
Table 37: EMC comparison between EN 61800-3 and EN 55011....................................................................... 194
Table 38: EMC, max. shielded motor cable length with regard to compliance with the limit value classes ......... 195
Table 39: Overview according to product standard EN 61800-3 ........................................................................ 195
Table 40: Overcurrent relative to time ................................................................................................................. 199
Table 41: Overcurrent relative to pulse and output frequency............................................................................. 200
Table 42: Scaling of setpoints and actual values (Selection)............................................................................... 202
Table 43: Processing of setpoints and actual values in the frequency inverter ................................................... 203
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SK 54xE – Users Manual for Frequency Inverters
10 BU 0505 EN-3021
1 General
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The SK 54xE series is based on the tried and tested NORD platform. The devices are characterised
by their compact design and optimum control characteristics, and have uniform parametrisation.
The devices have sensor-less current vector control with a wide range of settings. In combination with
suitable motor models, which always provide an optimised voltage/frequency ratio, all three-phase
asynchronous motors that are suitable for inverter operation and permanently excited synchronous
motors can be driven. For the drive unit, this means very high starting and overload torques with
constant speed.
The performance range extends from 0.25 kW bis 160.0 kW.
The use of modular modules means that the device series can be adapted to individual customer
requirements.
This manual is based on the device software as stated in the version list (see P707). If the frequency
inverter uses a different software version, this may cause differences. If necessary, the current manual
can be downloaded from the Internet (http://www.nord.com/).
Additional descriptions for optional functions and bus systems exist (http://www.nord.com/).
Information Accessories
The accessories mentioned in the manual are also subject to change. Current details of these are summarised in
separate data sheets, which are available at www.nord.com under the heading Documentation → Manuals →
Electronic Drive Technology → Techn. Info / Data Sheet. The data sheets available at the date of publication of
this manual are listed by name in the relevant sections (TI ...).
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As standard, the frequency inverters are equipped with a fixed heat sink, via which the power losses
are dissipated to the environment. Alternatively, for sizes 1 - 4 there is the ColdPlate version and for
sizes 1 and 2 there is also an external heat sink version.
As standard, inverters for 230V or 400V operating voltage are supplied with an integrated mains filter.
However, versions without a mains filter are available for frequency inverters above Size 7. Frequency
inverters for 115V operating voltage are normally supplied without mains filters.
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1.1 Overview
Properties of the basic frequency inverter 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)
• Frequency inverters Type SK 5xxE … -A: Integrated EMC mains filter for limit curve A1 (and
B1 for inverters Size 1 - 4) according to EN 55011, Category C2 (and C1 for inverters Size 1 - 4)
according to EN 61800-3 (not for 115 V inverters)
• Frequency inverters Type SK 5xxE … -O: without integrated EMC mains filter.
• 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)
• Four separate online switchable parameter sets
• RS232/485 interface via RJ12 plug connector
• Integrated USS and Modbus RTU (see BU 0050)

1 General
BU 0505 EN-3021 11
Feature
SK …
50xE
51xE
511E
520E
53xE
54xE
Additional
options
Operating manual BU 0500 BU
0505
Safe pulse block (STO / SS1)*
x
x
x
x
BU 0530
2 x CANbus/CANopen interfaces via RJ45
plug x x x x BU 0060
RS485 interface additionally via terminals
x
x
x
Speed feedback via incremental encoder
input x x x
Integrated “POSICON” positioning control
x
x
BU 0510
CANopen absolute encoder evaluation
x
x
BU 0510
PLC / SPS – functionality
x
x
x
BU 0550
Universal encoder interface
(SSI, BISS, Hiperface, EnDat and SIN/COS) x BU 0510
Operation of PM synchronous motors
(Permanent Magnet Synchronous Motors) x x x x x x
Number of digital inputs / outputs** 5 / 0 5 / 0 5 / 0 7 / 2 7 / 2
5 / 3 6 / 2
7 / 1
Additional potential-isolated PTC input***
x
Number of analog inputs / outputs
2 / 1
2 / 1
2 / 1
2 / 1
2 / 1
2 / 1
Number of relay messages
2
2
2
2
2
2
* not with 115 V devices
** SK 54xE: 2 I/Os can be variably parameterised as inputs or outputs
*** alternative "thermistor" function on digital input 5 possible (above size 5 an additional thermistor input is available as
standard)
Table 2: Overview of SK 500E performance grading features
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Differing hardware features
Version Description
SK 5xxE-…-CP
compared with SK 5xxE • ColdPlate or external heat sink
SK 5x5E
compared with SK 5x0E • External 24V supply voltage. Communication with the frequency inverter is
possible even without a power connection
For size 5 and above in
comparison with sizes 1 –
4 (> 4 kW, 230V or
> 11 kW, 400V)
• Additional, separately mounted PTC input (potential isolated)
• External 24V supply voltage with automatic switchover to the internal 24V low
voltage generator on failure of the external control voltage.
• Processing of both bipolar and analog signals
• 2 x CANbus/CANopen interfaces via RJ45 plug as standard
Table 3: Overview of differing hardware features
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SK 54xE – Users Manual for Frequency Inverters
12 BU 0505 EN-3021
1.2 SK 5xxE with or without integrated mains filter
NORD supplies the inverter series (SK 500E … SK 545E) in two different versions, which differ in that
in contrast to the type Typ SK 5xxE-…-A, the inverter type SK 5xxE-…-Ois equipped with an EMC
mains filter at the factory.
The EMC mains filter which is integrated into the SK 5xx-…-Atypes is fitted to the mains input and is
used to fulfil the requirements of the EMC Directive 2004/108/EC (issue of the CE mark).
1.2.1 Operation of an SK 5xxE-…-A frequency inverter
If an input choke is connected upstream of the frequency inverter, a resonance circuit results from
the mains impedance, the input choke and the X2-capacitors of the internal EMC filter.
This resonance circuit is excited by harmonics in the mains voltage as well as by switching actions in
the mains, however, due to the typically high damping level, this does not result in permanent
oscillations of increasing amplitude.
If devices are connected to the supply network in parallel, e.g. compensation systems, wind energy
plant, etc., which permanently or temporarily generate harmonics in the frequency range stated above,
stronger excitation of the resonance circuit may occur, as a result of which there is an increase of the
harmonic voltage, which is superimposed on the mains voltage.
Result:
– Overload up to total failure of the X2 capacitors
– Impermissible charging of the link circuit with error messages, up to exceeding of the
permissible link circuit voltage with total failure.
In both cases, permanent damage to the frequency inverter is possible
Information
Devices above 45 kW (Size 8 – 11)
For inverters of Size 8 to 11 link circuit chokes are available, which are used in place of the input choke. In the
resonance circuit described above, there is no inductance due to the input choke, so that the resulting resonant
frequency is in a non-critical high frequency range.
1.2.2 Operation of an SK 5xxE-…-O frequency inverter
The SK 5xxE-xxx-340-O is not equipped with an EMC mains filter and only has reduced X2-capacitors
for the basic reduction of interference at the mains input. In "O" frequency inverters, the mains-side
filtration is reduced to an absolute minimum, so that with the use of an input / mains choke, resonant
frequencies in excess of the maximum permissible pulse frequency (16 kHz) of the frequency inverter
result.
In this considerably higher frequency range, adequate damping can be assumed, as a result of which
the resonance phenomena with the consequences described above is not to be expected.
A suitable bottom-mounted filter is available in order to comply with the EMC requirements for these
inverters (please see chapter 8.3 "Electromagnetic compatibility (EMC)"), (please see chapter 2.8
"Line filter").

1 General
BU 0505 EN-3021 13
1.2.3 Which type of inverter should be used?
There is no general answer to this question. In principle, an inverter with an integrated EMC-mains
filter (…-A) is preferable, as the EMC requirements are fulfilled by this device. However, under certain
circumstances an "...-O" inverter must be used.
In particular for critical (harmonic) mains supplies, or with the use of an input choke, (SK CI1-…) an
"…-O" inverter should be used.
How can critical mains supplies be recognised?
a. Increased link circuit voltages in Standby or even overvoltage error messages indicate
resonance effects. The actual applied voltage can be checked and investigated for plausibility
via the information parameters of the frequency inverter (P728 - Input voltage/Mains voltage,
P736 - Link circuit voltage, or P753 - Statistics for overvoltage/Number of E005 error
messages).
b. In the network there have already been failures of frequency inverters with damage to the link
circuit capacitors or to the EMC mains filter circuits.
c. Sliding contacts in power rails may cause brief power interruptions (e.g. transport carriages in
high bay storage warehouses).
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1.3 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 carry out a thorough assessment.
Important! This also applies even if the packaging is undamaged.
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1.4 Scope of supply
Standard version:
• IP20
• Integrated brake chopper
• Integrated EMC mains filter for limit curve A1 or Category C2 (only inverters
of type SK 5xxE-…-A)
• Blanking cover for the technology unit slot
• Screening terminal for control terminals
• Covering for the control terminals
• Size 1 to Size 7: Accessory bag with wall mounting brackets
• Size 8 and above: miscellaneous electrical connection material
• Screw (2.9 mm x 9.5 mm) for fastening the blanking cover or an optional
SK TU3-… technology unit
• Operating instructions on CD

SK 54xE – Users Manual for Frequency Inverters
14 BU 0505 EN-3021
Available accessories:
Designation Example Description
Control and parameterisation options
Technology units for
attachment to the inverter
For commissioning, parameterisation and control
of the device.
Type SK TU3-CTR, SK TU3-PAR, SK CSX-0
(please see chapter 3.2 "Overview of technology
units")
Technology units for
installation in the control
cabinet
For commissioning, parameterisation and control
of the device.
Type SK CSX-3E, SK PAR-3E
(please see chapter 3.2 "Overview of technology
units")
Hand-held control boxes
For control of the inverter,
Typ SK POT- …
Refer to BU 0040
NORD CON
MS Windows ® - based
software
For commissioning, parameterisation and control
of the device.
Refer to www.nord.com
NORD CON

1 General
BU 0505 EN-3021 15
Designation Example Description
Bus interfaces
Technology units which are clipped onto the
inverter for: AS-Interface, CANopen, DeviceNet,
InterBus, Profibus DP, EtherCat, Ethernet/IP,
Profinet IO, Powerlink,
Type SK TU3-...
(please see chapter 3.2 "Overview of technology
units")
Brake resistor
Chassis-mounted brake resistor
Dissipation of generated energy from the drive
system by conversion into heat. Energy is
generated by the braking processes,
Type SK BR2- …
(please see chapter 2.6 "Brake resistor (BR)")
Bottom-mounted brake resistor
Refer to:
Chassis-mounted brake resistor,
Type SK BR4- …
(please see chapter 2.6 "Brake resistor (BR)")
Choke
Output choke
Reduction of radiated interference (EMC) from
the motor cable, compensation of cable
capacitances,
Type SK CO1- …
(please see chapter 2.7.2 "Output choke SK
CO1")
Input choke
Reduction of mains-induced harmonic
components and charging currents,
Type SK CI1…
(please see chapter 2.7.1.2 "Input choke SK CI1-
…")
Link circuit choke
Reduction of mains-induced voltage distortions
and harmonic components,
Type SK DCL- …
(please see chapter 2.7.1.1 "Link circuit choke
SK DCL-")

SK 54xE – Users Manual for Frequency Inverters
16 BU 0505 EN-3021
Designation Example Description
Mains filter
Chassis-mounted mains filter
Reduction of radiated interference (EMC)
Type SK HLD …
(please see chapter 2.8.3 "Line filter SK HLD")
Bottom-mounted mains filter
Reduction of radiated interference (EMC)
Type SK LF2 …
(please see chapter 2.8.2 "Mains filter SK LF2
(size 5 - 7)")
Bottom-mounted combination
filter
Reduction of radiated interference (EMC) and
compensation of cable capacitances,
Type SK NHD …
(please see chapter 2.8.1 "Mains filter SK NHD
(up to size 4)")
Installation versions
Mounting rail mounting set
Set for mounting the inverter on a standard TS35
mounting rail (EN 50022),
Type SK DRK1- …
(please see chapter 2.4 "Snap-on mounting rail
kit SK DRK1-…")
External heat sink kit
Heat sink kit for mounting on a ColdPlate inverter
version (SK 5xxE…-CP). This enables waste
heat to be directly removed from the control
cabinet,
Type SK TH1- …
(please see chapter 2.3 "External heat sink kit")

1 General
BU 0505 EN-3021 17
Designation Example Description
EMC Kit
Screening bracket for EMC-compliant connection
of shielded cables,
Type SK EMC2- …
(please see chapter 2.5 "EMC Kit")
Electronic brake rectifier
Direct control of electro-mechanical brakes
Type SK EBGR-1
Refer to Link
IO extension
External IO extension (analog and digital)
Type SK EBIOE-2
Refer to Link
Interface converter
Signal converter from RS232

RS485,
Type SK IC1-232/485
Refer to Link
Setpoint converter ± 10 V
Signal converter to convert bipolar to unipolar
analog signals (only for FI Sizes 1 - 4),
Type setpoint converter ± 10 V
Refer to Link
Connection module V/F converter
Signal converter for conversion of the 0 – 10 V
analog signals from a potentiometer into pulse
signals for evaluation at the digital input of the
frequency inverter (SK 500E … SK 535E),
Type connection module V/F converter
Refer to Link
Connection module V/I converter
Signal converter to convert 0 – 10 V analog
signals to 0 – 20 mA signals, for example for
evaluation by a PLC with a current signal input,
Type connection module V/F converter
Refer to Link
RJ45 connection module
Adapter for single wire signal cables to RJ 45,
Type WAGO Ethernet connection module
with CAGE CLAMP connection
(please see chapter 2.11 "RJ45 WAGO-
Connection module")
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SK 54xE – Users Manual for Frequency Inverters
18 BU 0505 EN-3021
Software (Free download)
NORD CON
MS Windows ® - based
software
For commissioning, parametrisation and control
of the device.
Refer to www.nord.com
NORD CON
ePlan macros
Macros for producing electrical circuit diagrams
Refer to www.nord.com
ePlan
Device master data
Device master data / device description files for
NORD field bus options
NORD fieldbus files
S7 standard modules for
PROFIBUS DP and
PROFINET IO
Standard modules for NORD frequency
converters
Refer to www.nord.com
NORD S7_files
Standard modules for the TIA
portal for PROFIBUS DP and
PROFINET IO
Standard modules for NORD frequency
converters
In preparation
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1.5 Safety and installation notes
The devices are operating materials intended for use in industrial high voltage systems, and are
operated at voltages that could lead to severe injuries or death if they are touched.
The device and its accessories must only be used for the purpose which is intended by the
manufacturer. Unauthorised modifications and the use of spare parts and additional equipment which
has not been purchased from or recommended by the manufacturer of the device may cause fire,
electric shock and injury.
All of the associated covers and protective devices must be used.
Installation and other work may only be carried out by qualified electricians with strict adherence to the
operating instructions. Therefore keep these Operating Instructions at hand, together with all
supplementary instructions for any options which are used, and give them to each user.
Local regulations for the installation of electrical equipment and accident prevention must be complied
with.
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1 General
BU 0505 EN-3021 19
1.5.1 Explanation of labels used
DANGER Indicates an immediate danger, which may result in death or serious injury.
WARNING Indicates a possibly dangerous situation, which may result in death or
serious injury.
CAUTION Indicates a possibly dangerous situation, which may result in slight or
minor injuries.
NOTICE Indicates a possibly harmful situation, which may cause damage to the
product or the environment.
Note Indicates hints for use and useful information.
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1.5.2 List of safety and installation notes
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DANGER!
Electric shock
The device operates with a dangerous voltage. Touching certain conducting components (connection terminals,
contact rails and supply cables as well as the PCBs) will cause electric shock with possibly fatal consequences.
Even when the motor is at a standstill (e.g. caused by an electronic block, blocked drive or output terminal short-
circuit), the line connection terminals, motor terminals and braking resistor terminals (if present), contact rails,
PCBs and supply cables may still conduct hazardous voltages. A motor standstill is not identical to electrical
isolation from the mains.
Only carry out installations and work if the device is disconnected from the voltage and wait at least
5 minutes after the mains have been switched off! (The equipment may continue to carry hazardous voltages for
up to 5 minutes after being switched off at the mains).
Follow the 5 Safety Rules (1. Switch off the power, 2. Secure against switching on, 3. Check for no voltage,
4. Earthing and short circuiting, 5. Cover or fence off neighbouring live components).
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DANGER!
Electric shock
Even if the drive unit has been disconnected from the mains, a connected motor may rotate and possible
generate a dangerous voltage. Touching electrically conducting components may then cause an electric shock
with possible fatal consequences.
Therefore prevent connected motors from rotating.
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WARNING
Electric shock
The voltage supply of the device may directly or indirectly put it into operation, or touching electrically conducting
components may then cause an electric shock with possible fatal consequences.
Therefore, all poles of the voltage supply must be disconnected. For devices with a 3-phase supply,
L1 / L2 / L3 must be disconnected. For devices with a single phase supply, L1 / N must be disconnected. For
devices with a DC supply, –DC / +B must be disconnected. Also, the motor cables U / V / W
must be
disconnected.
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Dasverknüpfte Bild kann nicht angezeigt werden. Möglicherweise wurde die Datei
Dasverknüpfte Bild kann nicht angezeigt werden. Möglicherweise wurde die Datei

SK 54xE – Users Manual for Frequency Inverters
20 BU 0505 EN-3021
WARNING Electric shock
In case of a fault, insufficient earthing may cause an electric shock with possibly fatal consequences if the device
is touched.
Because of this, the device is only intended for permanent connection and may not be operated without effective
earthing connections which comply with local regulations for large leakage currents (> 3.5 mA).
EN 50178 / VDE 0160 stipulates the installation of a second earthing conductor or an earthing conductor with a
cross-section of at least 10 mm2. (TI 80-0011), (TI 80-0019)
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WARNING Danger of injury if motor starts
With certain setting conditions, the device or the motor which is connected to it may start automatically when the
mains are switched on. The machinery which it drives (press / chain hoist / roller / fan etc.) may then make an
unexpected movement. This may cause various injuries, including to third parties.
Before switching on the mains, secure the danger area by warning and removing all persons from the danger
area.
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CAUTION
Danger of burns
The heat sink and all other metal components can heat up to temperatures above 70 °C.
Touching such components may cause local burns to the affected parts of the body (hands, fingers, etc.).
To prevent such injuries, allow sufficient time for cooling down before starting work - the surface temperature
should be checked with suitable measuring equipment. In addition, keep a sufficient distance from adjacent
components during installation, or install protection against contact.
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NOTICE Damage to the device
For single phase operation (115 / 230 V) the mains impedance must be at least 100 µH for each conductor. If this
is not the case, a mains choke must be installed.
Failure to comply with this may cause damage to the device due to impermissible currents in the components.
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NOTICE EMC - Interference
The device is a product which is intended for use in an industrial environment and is subject to sales restrictions
according to IEC 61800-3. Use in a residential environment may
require additional EMC measures.
(Document TI 80_0011)
For example, electromagnetic interference can be reduced by the use of an optional mains filter.
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NOTICE Leakage and residual currents
Due to their principle of operation (e.g. due to integrated mains filters, mains units and capacitors), the devices
generate leakage currents. For correct operation of the device on a current-sensitive RCD, the use of an all-
current sensitive earth leakage circuit breaker (Type B) compliant with EN 50178 / VDE 0160 is necessary.
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Information
Operation on TN- / TT- / IT- networks
The devices are suitable for operation on TN or TT networks as well as for IT networks with the configuration of
the integrated mains filter. (Section 2.9.2 "Adaptation to IT networks")
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Information Maintenance
In normal use, soft starter are maintenance-free.
The cooling surfaces must be regularly cleaned with compressed air if the ambient air is dusty.
In the event of taking out of service or storage for long periods, special measures must be taken (Section 9.1
"Maintenance Instructions").
Failure to do this will damage these components and will cause a considerable reduction of the service life -
including the immediate destruction of the devices.
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