SK 180E Manual for frequency inverters About this document
NORD frequency inverters
Safety and operating instructions for
drive power converters
(as per: Low Voltage Directive 2006/95/EEC)
1.General
During operation, drive power converters may, depending on their
protection class, have live, bare, moving or rotating parts or hot
surfaces.
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, 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 assembly,
installation, commissioning and operation of this product and who
have the relevant qualifications for their work.
2. Proper use in Europe
Drive power converters are components intended for installation in
electrical systems or machines.
When installed in machines, the drive power converter cannot be
commissioned (i.e. commencement of the proper use) until it has
been ensured that the machine meets the provisions of the EC
Directive 2006/42/EEC (Machine Directive); EN 60204 must also be
complied with.
Commissioning (i.e. implementation of the proper use) is only
permitted if the EMC directive (2004/108/EEC) is complied with.
Drive power converters with a CE label meet the requirements of the
Low Voltage Directive 2006/95/EEC. The stated harmonized
standards for drive current inverters 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 drive power converters 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 equipment must be implemented
according to the regulations in the corresponding documentation.
The drive power converters 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.
Drive power converters have electrostatically sensitive
components, which 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 live drive power converters, 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 installation of
cables – can be found in the drive power converter
documentation. These instructions must be complied with
even with CE marked drive power converters. Compliance
with the limit values specified in the EMC regulations is the
responsibility of the manufacturer of the system or machine.
6. Operation
Systems in which 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.
The parameterisation and configuration of the drive power
converter must be selected so that no hazards can occur.
All covers must be kept closed during operation.
7. Maintenance and repairs
After the drive power converter is disconnected from the
power supply, live equipment components and power
connections should not be touched immediately, because of
possible charged capacitors. Observe the applicable
information signs located on the drive power converter.
Further information can be found in this documentation.
These safety instructions must be kept in a safe place!
2 BU 0180 GB-0914
SK 180E Manual for frequency inverters About this document
Designation of
previous issues
Software
Version
Comments
BU 0180 DE, June 2013
Part. No.607 1801 / 2313
V 1.0 R0
First version based on BU 0200 DE / 2011
BU 0180 EN, February 2014
Part No. 607 1801 / 0914
V 1.0 R1
Bus options supplemented (Section 3),
Amendment of individual technical data (Section 8)
1.5 kW, 3~ 230V device added (Section 8.2.2)
Revision of EMC section, incl. supplement to EC Declaration
of Conformity (Section 9.3)
Various other corrections
Documentation
Designation: BU 0180 GB
Part No.: 607 1801
Device series: SK 180E, SK 190E
Device types: SK 1x0E-250-112-O ... SK 1x0E-750 -112-O, 0.25 - 0.75 kW, 1~ 100-120 V, Output. 230 V
SK 1x0E-250-323 -B ... SK 1x0E-111-323-B, 0.25 - 1.1 kW, 1/3~ 220-240 V SK 1x0E-151-323 -B, 1.5 kW, 3~ 220-240 V
SK 1x0E-250-340 -B ... SK 1x0E-221-340-B, 0.25 – 2.20 kW, 3~ 380-480 V
SK 180E Manual for frequency inverters About this document
Intended use of the frequency inverter
Compliance with the operating instructions is essential 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.
Frequency inverters are devices for industrial and commercial plants for operating threephase 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.
Frequency inverters are devices for fixed installation on motors or in systems in the vicinity
of the motors to be operated. 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 and that the conformity of
the end product meets the Machinery Directive 2006/42/EEC (observe EN 60204).
Getriebebau NORD GmbH & Co. KG, 2014
4 BU 0180 GB-0914
Table of Contents
1 GENERAL ................................................................................................................................. 8
9.11.2 Repair information ............................................................................................... 179
9.12 Abbreviations in this manual .......................................................................... 180
10 KEYWORD INDEX .............................................................................................................. 181
BU 0180 GB-0914 7
SK 180E Manual for frequency inverters
1 General
The SK 1x0E series 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 extension modules.
Due to the numerous setting options, these inverters are capable of controlling all three-phase motors.
The power range is from 0.25 kW to2.2 kW. The device is equipped with an integrated mains filter.
This manual is based on the device software V1.0 R1 (see P707) of the frequeny inverter. 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 (www.nord.com).
For the various versions SK 180E / 190E there are also supplementary descriptions for the integrated AS
interface (BU 0180, Section 5.4)
If a bus system is used for communication, a corresponding description (e.g. BU 0220 for PROFIBUS DP) is
provided, or this can be downloaded from the Internet (www.nord.com).
Typically, this series of devices is installed directly on a three-phase asynchronous motor. Alternatively,
optional accessories are available for mounting the devices near to the motor, e.g. on the wall or on a
machine frame.
In order to gain access to all parameters, the internal RS232 PC interface (RJ12) can be used, or an
optional SimpleBox or ParameterBox may be used. In this case, the parameter settings which are changed
by the operator are saved in the EEPROM which is integrated into the frequency inverter.
8 Pre-series version BU 0180 GB-0914
1.1 Overview
Basic features of the SK 180E / SK 190E:
High starting torque and precise motor speed control setting with sensorless current vector control
Can be installed directly on, or near to the motor.
Permissible ambient temperature -25°C to 50°C (please refer to the technical data)
Integrated EMC line filter for limit curve category C1, motor-mounted (not for 115V devices)
Automatic measurement of the stator resistance or determination of the precise motor data
Programmable direct current braking
Only size 2: Built-in brake chopper for 4 quadrant operation, optional brake resistors (internal/external)
2 analog inputs (switchable between current and voltage operation), which can also be used as
digital inputs.
3 digital inputs
2 digital outputs
Temperature sensor input (TF+/TF-)
NORD system bus for connection of additional modules, with switchable termination resistor and
address which can be set with DIP switches.
Four separate online switchable parameter sets
Diagnostic LEDs
RS232/RS485 interface via RJ12 plug
Additional features of the SK 190E:
Integrated AS interface
1 General
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 carry out a thorough assessment.
Important! This also applies even if the packaging is undamaged.
1.3 Scope of supply
Standard version: IP55 (optionally IP66)
Operating instructions as PDF file on CD-ROM
incl. NORD CON (PC-based parameterisation software)
Available accessories:
NOTE: Only the options listed in this manual may be used with the frequency inverter. Options for other
series (e.g. SK CSX-0) may destroy the device and its options.
Only Size 2: Braking resistor, required for energy feedback, Section 2.3
Matching RJ12 to SUB-D9 adapter cable to connection to a PCSK CSX-3H, SimpleBox, 4-digit 7-segment LED display
SK PAR-3H, ParameterBox, plain text LCD display
BU 0180 GB-0914 Pre-series version 9
SK 180E Manual for frequency inverters
Extension modules:
internal SK CU4-IOE, internal I/O extension
SK CU4-PBR, internal PROFIBUS DP® module
SK CU4-CAO, internal CANopen® module
SK CU4-DEV, internal DeviceNet™ moduleSK CU4-ECT, internal EtherCAT® module (Note: Derating)
SK CU4-PNT, internal PROFINET IO® module (Note: Derating) SK CU4-POL, internal POWERLINK module (Note: Derating) SK CU4-EIP, internal Ethernet/IP™ module (Note: Derating) SK CU4-POT , Potentiometer adapter: internal potentiometer/switch module
SK CU4-REL, internal setpoint converter for bipolar analog signals, incl. 2 relays
SK CU4-MBR, internal brake rectifier for controlling electromechanical brakes
SK TIE4-POT, potentiometer module
SK TIE4-SWT, direction selector switch module
external SK TU4-IOE, external I/O extension
SK TU4-PBR, external PROFIBUS DP® module
SK TU4-CAO, external CANopen® module
SK TU4-DEV, external DeviceNet™ moduleSK TU4-ECT, external EtherCAT® module
SK TU4-PNT, external PROFINET IO® module
SK TU4-POL, external POWERLINK module
SK TU4-EIP, external Ethernet/IP™ module
SK TI4-TU-BUS or NET or MSW, connection unit TU4 SK TIE4-WMK-TU, wall-mounting kit TU4 SK TU4 MSW, external maintenance switch
NOTE: Details for the use of the relevant bus systems can be found in the applicable supplementary bus
manual or in the data sheets for the individual modules.
> www.nord.com <
10 Pre-series version BU 0180 GB-0914
1.4 Safety and installation information
The 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 with the
device disconnected. The operating instructions must always be available to these
persons and must be strictly observed.
Local regulations for the installation of electrical equipment and 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 (115/230 V) the mains impedance must be at least 100 H
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 an electronic 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
electrical isolation from the mains.
Warning, with certain settings, the frequency inverter/motor can start up automatically
after the mains are switched on.
The frequency inverter is primarily intended for permanent connection and may not be
operated without effective earthing connections that comply with local regulations for
large leakage currents (> 3.5 mA). VDE 0160 stipulates the installation of a second
earthing conductor or an earthing conductor cross-section of at least 10 mm2.
However, connection via a plug connector is also permissible if local regulations are
complied with.
A universal leakage current-sensitive circuit breaker (type B) compliant
with EN 50178/VDE 0160 must be used.
In normal use, frequency inverters are maintenance-free. The cooling surfaces must be
regularly cleaned with compressed air if the ambient air is dusty.
The frequency inverters are suitable for operation on TN or TT networks and with
observation of the measures described in Section 2.7.4, they are also suitable for IT
networks.
1 General
BU 0180 GB-0914 Pre-series version 11
SK 180E Manual for frequency inverters
CAUTION
The heat sink and all other metal components can heat up to temperatures above 70°C.
When mounting, sufficient distance from neighboring components must be maintained. When
working on the components, allow sufficient cooling time beforehand
Protection against accidental contact may need to be provided.
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!
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.
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.
Keep these operating instructions in an accessible location and give them to all operators!
WARNING
This product is intended for use in an industrial environment and is subject to sales
restrictions according to IEC 61800-3. Depending on the type of installation and the length of
the motor connection cable this product can cause high frequency interference in a domestic
environment, in which case the user may be required to take appropriate measures.
An appropriate measure would be the inclusion of a recommended mains filter.
12 Pre-series version BU 0180 GB-0914
NOTE
"Integral solid state short circuit protection does not provide branch circuit protection. Branch
circuit protection must be provided in accordance with the National Electric Code and any
additional local codes."
The integral short-circuit protection does not provide branch circuit protection. Branch circuit
protection must be provided in accordance with the "National Electric Code" and all additional
local regulations.
NOTE
“The device has to be mounted according to the manufacturer instructions.”
"Installation must be carried out according to the manufacturer's instructions."
"Use 80°C Copper Conductors Only"
“Connection of copper cable with an insulation rating of at least 80°C“
(only refers to connection cables (mains and motor cables)
"These products are intended for use in a pollution degree 2 environment"
1.5 Certifications
1.5.1 European EMC Directive
If the frequency inverter is installed according to the recommendations in
this manual, it meets all EMC directive requirements, as per the EMC product standard for motor-operated systems EN 61800-3. (See also Section 9.3
Electromagnetic Compatibility [EMC].)
1.5.2 UL and cUL approval (in preparation)
The section applies for all devices of sizes 1 – 2. All frequency inverters are equipped with motor overload
protection. Further technical details can be found in Section 8.2.
1 General
UL Approval - File No. E171342
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 100000 rms Symmetrical
Amperes, 120 Volts maximum (SK 1x0E-xxx-112), 240 Volts maximum (SK 1x0E-xxx-323) or
480 Volts maximum (SK 1x0E-xxx-340) and when protected by RK5 class or faster fuses as indicated in chapter 8.2.”
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 10000 rms Symmetrical
Amperes, 120 Volts maximum (SK 1x0E-xxx-112), 240 Volts maximum (SK 1x0E-xxx-323) or 480 Volts maximum
(SK 1x0E-xxx-340) and when protected by Circuit Breaker (inverse time trip type) in accordance with UL 489”, current
and voltage ratings can be found in chapter 8.2.
„The torque value for the field wiring terminals for mains circuit terminals, motor terminals, break terminals and breaking
resistor terminals must be 11 … 15 lb-in (1.2 … 1.5Nm). The torque value for the field wiring terminals for control circuit
terminals must be 4.4 … 5.3 lb-in (0.5 … 0.6Nm).”
BU 0180 GB-0914 Pre-series version 13
SK 180E Manual for frequency inverters
N 23134
cUL Approval - File No. E171342
“cUL only in combination with SK CIF-340-30 or SK CIF-340-60 for 380-480V models and
SK CIF-323-20 or SK CIF-323-40 for 3 phase 200-240V rated models”. The recognized transient surge suppression filter board has to be connected between supply and the input of the
drive according to the instruction manual.
Remarks:
cUL approval for 110-120V models provided without filter board
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 5000 rms Symmetrical Amperes, 120 Volts maximum (SK 1x0E-xxx-112), 240 Volts maximum (SK 1x0E-xxx-323) or 480 Volts maximum (SK 1x0E-xxx-340) and when
protected by RK5 class or faster fuses according to instruction manual chapter 8.2.”
“Suitable For Use On A Circuit Capable Of Delivering Not More Than 5000 rms Symmetrical Amperes, 120 Volts maximum (SK 1x0E-xxx-112), 240 Volts maximum (SK 1x0E-xxx-323) or 480 Volts maximum (SK 1x0E-xxx-340) and when
protected by Circuit Breaker (inverse time trip type) in accordance with UL 489”, current and voltage ratings according to
instruction manual chapter 8.2.
1.5.3 C-Tick labeling
NORD frequency inverters fulfill all the relevant regulations in
Australia and New Zealand.
1.5.4 RoHS compliance
NORD frequency inverters are designed to be RoHS compliant according to Directive
2002/95/EEC.
14 Pre-series version BU 0180 GB-0914
Group
Example of type code
Basic unit
SK 180E-370-340-A (-C)
Connection unit - Technology Unit
SK TI4-TU-MSW (-C-WMK-TU)
Optional modules
SK TU4-MSW (-C)
Extension modules
SK TIE4-M12-INI
Technology unit
SK TU4-xxx (-…)
Connection unit
Technology Unit
Frequency inverter
SK 1x0E
1.6 Nomenclature / type codes
Unique type codes have been defined for the individual modules and devices. These provide individual
details of the device type, its electrical data, protection class, fixing version and special versions.
A differentiation is made according to the following groups:
1 General
The type designation resulting from this type code can be obtained
from the name plate which is attached to or printed on the relevant
module.
BU 0180 GB-0914 Pre-series version 15
SK 180E Manual for frequency inverters
SK 180E-370-323-B (-C)
IP protection class: Standard = IP55, C = “coated” = IP66
Radio interference filter: O = without, A = Class A1 (C2), B = Class B1 (C1)
Mains voltage: x12 = 115 V, x23 = 230 V, x40 = 400 V
Number of mains phases: 1xx = single phase, 3xx = 3-phase
(for 230V up to 1.1kW: 1~/3~)
Digits before decimal point for power: 0 = 0.xx, 1 = 0x.x0, 2 = 0xx.0
Device nominal power: 250 = 0.25 kW, 370 = 0.37 kW, ... 221 = 2.2 kW
Device series: SK 180E, SK 190E
(...) Options, only implemented if required.
SK TI4-TU-BUS (-C-WMK-TU)
Wall mounting kit: -1 = Size 1 + 2, -2 = Size 3
IP protection class: Standard = IP55, C = “coated” IP66
Suitable device types: NET = optional net module (e.g. TU4-24V-… )
MSW = maintenance switch (SK TU4-MSW)
BUS = optional bus module (z.B. CANopen: TU4-CAO)
Group: TU = Technology unit
Device series: SK TI4 = Adapter unit SK TI4
(...) Options, only implemented if required.
SK TU4-CAO (-C-M12)
M12 system connectors: only TU4, alternative to terminals
IP protection class: Standard = IP55, C = “coated” IP66
Option series: TU4 = external Technology Unit CU4 = internal customer unit
(...) Options, only implemented if required.
1.6.1 Type code / Frequency inverter - Basic device
1.6.2 Type codes / Adapter unit - Technology Unit
1.6.3 Type codes / Optional modules
For bus module or I/O extension
16 Pre-series version BU 0180 GB-0914
NOTE
The modules for the IP66 design are identified by an additional "-C" and are modified
according to the following special measures!
NOTE
For all versions, care must be taken that the cable and the cable gland are carefully
matched. Wherever possible, the cables should be inserted so that water is deflected away
from the device (if necessary use loops). This is essential to ensure that the required
protection class is maintained.
1.7 Version with protection class IP55 / IP66
The frequency inverters and additional modules are available in protection classes IP55 (standard) or
IP66 (optional). The protection class IP66 must always be stated when ordering!
There are no restrictions or differences to the scope of functions in either protection class. In order to differentiate the protection classes, modules with protection class IP66 are given an extra “-C” (coated coated
PCBs) in their type designation.
e.g. SK 180E-750-340-B-C
IP55 version:
The IP55 version of the external frequency inverter is the standard version. Both versions (motor-mounted,
installed on the motor or wall mounted on the wall bracket) are available. In addition, all adapter units,
technology units and customer units are available for this design.
IP66 version:
In contrast to the IP55 version the IP66 version is a modified option. Both versions (motor-integrated, close
to motor) are also available. The modules available to the IP66 design (adapter units, technology units and
customer units) have the same functionalities as the corresponding IP55 design modules.
1 General
Special measures:
impregnated PCBs,
Powder coating RAL 9006 (white aluminium) for housing
Low pressure test
BU 0180 GB-0914 Pre-series version 17
SK 180E Manual for frequency inverters
Motor-mounted version
Wall-mounted version
NOTE
The equipment requires sufficient ventilation to protect against overheating. Details of
power reductions and possible ambient temperatures as well as other details can be found
in the section 8 "Technical Data".
2 Assembly and installation
2.1 Installation and assembly
The frequency inverters are available in various sizes depending on their output. They can be mounted on
the terminal box of a motor or in its immediate vicinity.
18 Pre-series version BU 0180 GB-0914
2 Assembly and installation
NOTE
Installation of an IP66-compliant frequency inverter must be carried out by NORD, as special
measures have to be implemented. IP66 components retrofitted on site cannot ensure that this
protection class is guaranteed.
2.1.1 Mounting the housing box
On delivery of a complete drive unit (gear unit + motor + frequency inverter) the frequency inverter is always
fully installed and tested.
When delivered separately, the frequency inverter includes the following components:
Frequency inverters
Screws and contact washers for mounting the motor terminal box.
Pre-fabricated cable for motor and PTC connections
Procedures:
1. If necessary, remove the original terminal box from the NORD motor, so that only the base of the termi-
nal box and the terminal strip remain.
2. Set the jumpers for the correct motor circuit and connect the pre-fabricated cables for motor and PTC
connections to the respective connection points on the motor.
3. Mount the cast housing on the terminal box base of the NORD motor using the existing screws and seal
as well as the enclosed lock washers. Position the cast housing with the cooling fins towards the fan end
of the motor. Check the adaptability for different motor manufacturers.
4. Connect the motor cables U, V, W to the power terminal block and the PTC cable TF+, TF- to the control
terminal block 38, 39.
BU 0180 GB-0914 Pre-series version 19
SK 180E Manual for frequency inverters
NORD motor sizes
Add-on
SK 1x0E Size 1
Add-on
SK 1x0E Size 2
Size 63 – 71
with adapter kit I
with adapter kit I
Size 80 – 112
Direct mounting
Direct mounting
Designation
Add-on SK 1x0E
Part No.
Adapter kit size 63-71 to KK80-112
(Adapter kit I)
Adapter plate, terminal box frame seal and screws
275119050
Adapter plate
Seal
Motor Size 71
Inverter SK 1x0E
Example
NOTE
The adaptability of motors from other manufacturers must be checked individually!
Information for the conversion of inverter-controlled drive units to the SK 1xxE can be found in
BU0320.
2.1.2 Adapters for different motors
In some cases, the terminal box attachments are different for different sizes of motor. Therefore, it may be
necessary to use an adapter to mount the frequency inverter.
In order to guarantee the maximum protection class IP55 / IP66 of the entire unit, motor must also have a
corresponding protection class.
Overview of adapter kits
20 Pre-series version BU 0180 GB-0914
2 Assembly and installation
Frequency inverter size
Screw size
Tightening torque
Size I
M5 x 25
3.5 Nm ± 20%
Size II
M5 x 25
3.5 Nm ± 20%
2.1.3 Installation of the frequency inverter
The housing cover must first be removed in order to make the electrical connections to the frequency
inverter. To do this, unscrew the 4 fastening screws, so that the housing cover can be removed upwards.
After the electrical connections of the supply cables have been made, the housing cover can be replaced.
To achieve the maximum protection class IP55/IP66, care must be taken that all the fastening screws of the
housing cover are tightened diagonally, step-by-step and with the torques stated in the table below.
For the cable gland of the connecting cable, appropriate screwed connections for cable cross-section must
be used.
BU 0180 GB-0914 Pre-series version 21
SK 180E Manual for frequency inverters
Option
location
Position
Meaning
Size
Sizes 1 - 2
Comments
1
Internal
Mounting location for customer units SK CU4-…
2
Internal
Installation location for internal brake resistor
Only for size 2
3*
on side
Mounting location for
external technology units SK TU4-…
Power plug connector (e.g. HARTING)
3 A/B*
on side
Cable gland
M25
Not available if location 3 is occupied or
SK TU4-… is fitted.
4 *,
5 *
on side
Cable gland
M16
Not available if
SK TU4-… is fitted.
* R and L (right and left side) – for motor installation: viewed from the fan wheel toward the motor shaft
3BR
3AR
3R
4R
5R
4L
5L
3AL
3BL
3L
3BR
3AR
3R
4R
5R
4L
5L
3AL
3BL
3L
2
2
2.1.4 Option slots in the device
Size 1:
Size 2:
The above drawings indicates the different installation locations for optional modules. Option slot 1 is used
for the mounting of an internal customer interface (e.g. bus module). Option location 2 for installing an
internal brake resistor is only present in size 2. The brake resistor may only be installed at the factory and must therefore be taken into account in the order. External bus modules, 24 V power supplies can
be implemented at option locations 3L or 3R. Option locations 4 and 5 are used for the installation of M12
sockets or plug connectors or for cable glands. Only one option per option location is possible.
22 Pre-series version BU 0180 GB-0914
2.2 Dimensions of the frequency inverter
Size
Mains / Power category SK 1x0E
1~ 110-120 V
1~, 3~ 200-240 V
3~ 380-480 V
Size I
0.25 ... 0.75 kW
0.25 ... 0.55 kW
0.25 ... 1.1 kW
Size II
-
0.75 ... 1.5 kW
1.5 ... 2.2 kW
* 1.5 kW only 3~
Size
Housing dimensions SK 1x0E / Motor
Weight of SK 2xxE
without motor
Approx. [kg]
FI
Motor
g
g 1 n o
p
Size I
Size 71 *
145
177.5
221
214
154
2.0
Size 80
165
171.5
236
Size 90 S / L
183
176.5
251 / 276
Size II
Size 80
165
196.5
255
236
165
3.3
Size 90 S / L
183
201.5
251 / 276
Size 100
201
210.5
306
All dimensions in [mm]
*) including additional adapter and seal (18mm) [275119050]
2.2.1 Power rating / Motor size
2.2.2 Motor-mounted frequency inverter
2 Assembly and installation
BU 0180 GB-0914 Pre-series version 23
SK 180E Manual for frequency inverters
Device type
Size
Housing dimensions
Wall-mounting
SK TIE4-WMK-L-1
total weight
Approx. [kg]
g2 n p
p2 d e
Size 1 SK TIE4-WMK-1
Part No. 275 274 000
113
221
154
205
64
180
5.5
2.6
Size 2 SK TIE4-WMK-1 Part No. 275 274 000
115,5
255
165
205
64
180
5.5
3.9
All dimensions in [mm]
2.2.3 Wall-mounted frequency inverter
The frequency inverter can be installed in the vicinity of the motor by means of an optional wall mounting kit.
All possible installation orientations are permissible for wall mounting. Please also note Section 8.
24 Pre-series version BU 0180 GB-0914
2 Assembly and installation
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
NOTE
The internal brake resistor may only be installed at the factory and can not be retrofitted.
It is essential that this is taken into account for the configuration an ordering of the device.
)²)/30(1(*tbrakesPnP
NOTE
If internal brake resistors are used, a suitable power limit must be set in P555, P556 and
P557. This is important in order to activate a peak and continuous power limit for the brake
resistor. Otherwise, the brake resistor may be damaged during operation.
2.3 Brake resistor (BR) (only size 2)
During dynamic braking (frequency reduction) of a three phase motor, electrical energy is returned to the
frequency inverter. From Size II or larger, an internal or external brake resistor may be used to prevent the
FI from shutting down in case of overvoltage. With this, the integrated brake chopper (electronic switch)
pulses the link circuit voltage (switching threshold approx. 420V/720V DC, according to the mains voltage)
into the braking resistor. The brake resistor ultimately converts the excess energy into heat.
For input voltages >460V the use of a brake resistor is generally recommended in order to compensate for
the reduced storage capacity of the link circuit due to the higher voltage.
2.3.1 Internal brake resistor SK BRI4-…
The internal brake resistor can be used if only slight, short braking phases are to be expected.
The output power of the SK BRI4 is limited (see also the following note field) and can be calculated as follows.
, however, P < P
(P=Brake power (W), Pn= Continuous brake power of resistor (W), Pmax. peak brake power, tbrakes = duration of braking process (s))
max
The permissible continuous brake power Pn must not be exceeded in the long-term average.
(For details of Pn and P
see Section 2.3.4)
max
BU 0180 GB-0914 Pre-series version 25
SK 180E Manual for frequency inverters
The external brake resistor (available for SK 1x0E, Size 2) is
intended for energy feedback, e.g. in pulse drives or lifting
gear. Here, it may be necessary to plan for the exact brake
resistor required.
For installation, an M20 screw connection with an adapter for
M25 is supplied. The connecting wires for the brake resistor
are fed through this into the connection unit. Because of the
cable gland the brake resistor and an optional SK TU4technology unit must not be mounted on the same side of the
frequency inverter.
Resistor type
A B C
Fixing dimensions
d
e
SK BRE4-1-100-100
SK BRE4-1-200-100
150
178
61
83
32
4.3
All dimensions in mm
A
B
C
d
e
2.3.2 External brake resistor SK BRE4-...
The brake resistor is attached to the side of the connection unit using 4 suitable M4 x 10 screws. Installation
of an SK BRE4… is not possible in combination with the wall-mounting kit SK TIE4-WMK(-L).
2.3.3 External brake resistor dimensions
26 Pre-series version BU 0180 GB-0914
2.3.4 Electrical data BR
Inverter ID
SK 1x0E-…
Resistor type
(IP54)
Resistance
Max. continuous
output / limit**
(Pn)
Energy
consumption*
(P
max
)
Connecting cable
or terminals
750…111-323-A
SK BRI4-1-200-100
Part. No. 275272008
200
100 W / 25%
1.0 kWs
Silicone
conductor
2x 0.75 mm
2
approx. 275 mm
151…221-340-A
SK BRI4-1-400-100
Part. No. 275272012
400
100 W / 25%
1.0 kWs
*) Maximum once within 10 s**
**) In order to prevent impermissible heating of the device, the continuous power is limited
to 1/4 of the rated power of the brake resistor.
This also has a limiting effect on the power consumption.
Inverter ID
SK 1x0E-…
Resistor type
(IP67)
Resistance
Max. continuous
power
(Pn)
Energy
consumption*
(P
max
)
Connecting cable
or terminals
750…111-323-A
SK BRE4-1-100-100
Part. No. 275273005
100
100 W
2.2 kWs
FEP flex
3x 1.9 mm2
AWG 14/19
approx. 350 mm
151…221-340-A
SK BRE4-1-200-100
Part. No. 275273008
200
100 W
2.2 kWs
*)Maximum once within 120 s
Internal
External
2 Assembly and installation
BU 0180 GB-0914 Pre-series version 27
SK 180E Manual for frequency inverters
Inverter ID
Filter type
Data sheet
SK 1x0E-250-323-A… SK 1x0E-111-323-A*
SK CIF-323-20
(alternatively SK CIF-323-40)
TI 030 276997070
(TI 030 276997071)
SK 1x0E-250-340-A… SK 1x0E-221-340-A
SK CIF-340-30
(alternatively SK CIF-340-60)
TI 030 276997080
(TI 030 276997081)
* (only with suitable mains choke)
CAUTION!
Modules SK CIF-323-x0 may only be used in combination with a suitable mains choke
(L
min
= 3 x 0,73 mH) (see connection diagram).
For SK CIF-340-x0 modules the use of a mains input choke is not mandatory, but is recommended.
Note
With the use of a mains choke, the effective input currents of the 1~ 230V frequency inverter reduce
to approximately the values of the output currents. Several frequency inverters can be connected to
a choke - filter combination. In this case, the total input currents must not exceed the current rating
of the filter.
2.4 Overvoltage filter SK CIF
The use of a suitable ("CSA-") overvoltage filter is mandatory (see also Section 1.5) in order to comply with
cUL requirements. For 230V devices, operation of the frequency inverter with a suitable overvoltage filter is
only permissible if a mains choke is used in addition.
For further information about the overvoltage filter, please refer to the relevant data sheet. These data
sheets can be downloaded at www.nord.com.
Without an overvoltage filter, frequency inverters for 1~ 115V mains (SK1x0E-xxx-112-O) cannot be
approved according to cUL.
28 Pre-series version BU 0180 GB-0914
2 Assembly and installation
NOTE
The control cables, line cables and motor cables must be laid separately. In no case should
they be laid in the same protective pipes/installation ducts.
The test for high voltage insulations must not be used on cables which are connected to the
frequency inverter.
ATTENTION
With the use of a ParameterBox SK PAR-3H this must never be simultaneously connected to
the frequency inverter and the PC, as potential shifts may cause damage, especially to the PC.
(See also Manual BU0040)
2.5 Wiring guidelines
The frequency inverter has been developed for use in an industrial environment. In this environment, high
levels of electromagnetic interference can influence the frequency inverter. In general, correct installation
ensures safe and problem-free operation. To meet the limiting values of the EMC directives, the following
instructions should be complied with.
(1) Ensure that all equipment in the control cabinet or field is securely earthed using short earthing cables
which have large cross-sections and are connected to a common earthing point or earthing rail. It is
especially important that all control devices connected to the frequency inverters (e.g. an automation
device) are connected to the same earthing point as the inverter itself, using a short cable with large
cross-section. Flat conductors (e.g. metal clamps) are preferable, as they have a lower impedance at
high frequencies.
(2) The bonding cable of the motor controlled by the frequency inverter should be connected directly to the
earthing terminal of the associated frequency inverter. The presence of a central earthing bar in the
control cabinet and the grouping together of all bonding conductors to this bar normally ensures safe
operation. (see also Section. 9.3 / 9.3.3 (EMC))
(3) Where possible, shielded cables should be used for control circuits. The shielding at the cable end
should be carefully sealed and it must be ensured that the wires are not laid over longer distances
without shielding.
The shields of analog setpoint cables should only be earthed on one side on the frequency inverter.
(4) The control cables should be installed as far as possible from power cables, using separate cable
ducts, etc. Where cables cross, an angle of 90° should be ensured as far as possible.
(5) Ensure that the contactors and brake chokes in the cabinet are interference protected, either by RC
circuits in the case of AC contactors, or by “free-wheeling” diodes for DC contactors, whereby the
interference protectors must be positioned on the contactor coils. Varistors for over-voltage
limitation are also effective. This interference suppression is particularly important when the contactors
are controlled by the relay in the frequency inverter.
(6) Use screened or armoured cable for the load connections (motor cable) and earth the
screening/armour at both ends, if possible to the frequency inverter bonding.
In addition, an EMC-compliant cabling must be ensured (see also Section. 9.3 / 9.3.3 (EMC)).
The safety regulations must be complied with under all circumstances
when installing the frequency inverter!
BU 0180 GB-0914 Pre-series version 29
SK 180E Manual for frequency inverters
WARNING
THE DEVICES MUST BE EARTHED.
Safe operation of the devices requires that is installed and commissioned by qualified personnel
in compliance with the instructions provided in this Manual.
In particular, the general and regional installation and safety regulations for work on high voltage
systems (e.g. VDE) must be complied with, as must the regulations concerning correct use of
tools and the use of personal protection equipment.
Dangerous voltages can be present at the motor connection terminals even when the inverter is
switched off. Always use insulated screwdrivers on these terminal fields!
Ensure that the input voltage source is not live before setting up or changing connections to the
unit.
Make sure that the inverter and motor are specified for the correct supply voltage.
2.6 Electrical connection
NOTE: As with other signal cables, thermistor cables must be laid separately from the motor cables.
The housing cover must be removed from the SK 1x0E in order to make the electrical connections. Proceed
as follows:
1. Switch off the mains supply and if necessary check and observe the waiting period.
2. Loosen the 4 Allen screws (4 mm).
3. Carefully lift the housing cover vertically from off the housing box.
4. The electrical connections and the option slots are now freely accessible.
30 Pre-series version BU 0180 GB-0914
5. Replace the cover
6. Evenly tighten the Allen screws in a cross-wise direction (for tightening torques, please refer to
Section 2.1.3).
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