7.8.4 Conductors
Conductor types
Model K: Use stranded copper conductors only.
Conductor temperature ratings
Model K: Use 167 °F copper conductors only. The wire sizes for
the supply mains must be sized for a wire size which is suitable for
at least 125% of the rated input current of the motor drive units.
7.8.5 Conduit hubs
Conduit hubs must be UL listed according to UL Category Code
Number (CCN) DWTT/DWTT7 and be suitable for the relevant
enclosure type rating in accordance with UL 514B and CSA C22.2
No. 18.3.
For type 2 enclosures it is also allowed to use type 2, 3, 3R, 3S, 4,
4X, 5, 6, 6P, 12 and 13 conduit hubs.
For type 12 enclosures it is also allowed to use type 12 and 13
conduit hubs.
The relevant type rating can be found on the nameplate of the
product.
7.8.6 Three-phase connections
The cables in the terminal box must be as short as possible.
However, the separated protective-earth conductor must be so long
that it is the last one to be disconnected in case the cable is
inadvertently pulled out of the cable entry.
To maintain the cURus mark, additional requirements
apply to the equipment. See the appendix concerning
installation in the USA and Canada.
Model K: To avoid loose connections, ring terminals must be used.
Ensure that ring terminals are short enough to stay within the
terminal cover.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
Power supply connection on a three-phase product
TM082860
Model K
Pos. Description
L1 Phase 1
L2 Phase 2
L3 Phase 3
PE Protective earth
7.9 Additional protection
7.9.1 Overvoltage and undervoltage protection
Overvoltage and undervoltage may occur in case of unstable power
supply or a faulty installation. The product stops if the voltage falls
outside the permissible voltage range. The product restarts
automatically when the voltage is within the permissible voltage
range. The product requires no additional protection relay.
The product is protected against transients from the power
supply according to EN 61800-3. In areas with high
lightning intensity, we recommend external lightning
protection.
Overvoltage category:
The product is approved for Overvoltage category III rating.
7.9.2 Overload protection
The motor-current protection settings are fixed for each motor
variants. The settings ensure that the motor is protected against
overtemperature in all operating states with regard to supply voltage
and shaft load, including a blocked shaft.
The motors are current controlled and will respond by reducing the
speed if the shaft load increases more than 10 % of the nominal
load.
If the shaft load forces the speed down to minimum speed, the
motor shuts down.
A sudden increase in the motor current caused by a fault where the
peak of the motor current is increased 60 % above nominal will
cause the motor to shut down within 0.5 ms.
The product requires no additional protection.
7.9.3 Overtemperature protection
The motor is thermally protected by a temperature measurement in
the drive. It can handle the lack of airflow over the motor in case the
fan cover is blocked. It also means that the protection has a built-in
memory retention.
The time from start to shutdown due to overtemperature is therefore
always longer when starting at a motor temperature close to the
ambient temperature compared with restarting after a shutdown due
to overtemperature.
7.9.4
Protection against phase unbalance
Phase unbalance on the power supply must be minimised. The
three-phase motor must be connected to a power supply with a
quality corresponding to IEC 60146-1-1, class C. This also ensures
long life of the components.
7.9.5
Short-circuit current
The product's electronic power output short-circuit protection
circuitry meets the requirements of IEC 60364-4-41:2005/AMD1:-,
Clause 411.
Model K: Suitable for use on a circuit capable of delivering not
more than 5000 rms symmetrical amperes, 480 V maximum when
protected by gG fuses. See the section on fuse sizes.
7.10 Functional modules
The functional modules are different types of add-on boards
containing various types of input and output terminals for the user to
connect different types of sensors, for example switches and relays.
The product can only contain one functional module at the time.
The following functional modules are available:
• FM310
• FM311
3)
3)
Without Bluetooth (BLE).
The selection of module depends on the application and the
required number of inputs and outputs.
Related information
3.4.3 Identification of the functional module
7.10.1
Functional module, FM310 and FM311
Inputs and outputs
The FM311 functional module does not include Bluetooth
connection.
The module has these connections:
15
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