NORD Drivesystems BU0180 - Manual (Page 48)

SK 180E Manual for frequency inverters
48 Pre-series version BU 0180 GB-0914
2.10.4 Commissioning information
For Zone 22 the cable glands must at least comply with protection class IP 55. Unused openings must be
closed with blank screw caps suitable for ATEX Zone 22 3D (minimum protection class IP 55).
The motors are protected against overheating by means of the frequency inverter. This is carried out by the
evaluation of the motor PTC by the frequency inverter. In order to ensure this function, the PTC must be
connected to the intended input (Terminal 38/39 control terminal plug connector). In addition, care must be
taken that a NORD motor from the motor list (P200) is set. If a standard 4-pole NORD motor or a motor from
a different manufacturer is not used, the data for the motor parameters ((P201) to (P208)) must be adjusted
to those on the motor rating plate. In addition, the frequency inverter must be parameterised so that the
motor can be operated with a maximum speed of 3000
1
/
min
. For a four-pole motor, the "maximum
frequency" must be set to a value which is smaller or equal to 100Hz ((P105) ≤ 100). Here the maximum
permissible output speed of the gear unit must be observed. In addition, the monitoring "I²t-Motor"
(Parameter (P535) / (P533)) must be switched on and the pulse frequency set to between 4 kHz and 6 kHz.
Overview of the necessary parameter settings:
Parameter Setting value Factory setting Description
P105
Maximum
frequency
≤ 100 Hz [50]
This value relates to a 4-pole motor. On principle,
the value must only be so large that a motor
speed of 3000 rpm is not exceeded.
P200
motor list Select the appropriate
motor power
[0]
If a 4-pole NORD motor is used, the preset motor
data can be called up.
P201 – P208
Motor data
Data according to rating
plate
[xxx]
If a 4-pole NORD motor is not used, the motor
data on the rating plate must be entered here.
P218
Degree of
modulation
≥ 100% [100] Determines the maximum possible output voltage
P504
Pulse frequency
4kHz … 6kHz [6]
For pulse frequencies above 6 kHz a reduction of
the maximum torque is necessary.
P533
Factor I
2
t-Motor
< 100% [100]
A reduction in torque can be taken into account
with values less than 100 in the I²t monitoring.
P535
I²t motor
According to motor and
ventilation
[0]
The I²t- monitoring of the motor must be switched
on. The values to be set depend on the type of
ventilation and the motor which is used, see
Planning Guideline No.: 605 2101
2.11 Outdoor installation
The frequency inverter and the technology units can be installed outdoors under the following conditions:

IP66 version (See Special Measures, Section 1.7)

UV-resistant blank screw caps. and inspection windows.
It is recommended that the frequency inverter is provided with a sun shield.
The UV-resistant blind plugs and inspection glasses form part or the ATEX kit for the frequency inverter.
I.e. if the ATEX option for IP66 (Section 2.10) is used, all conditions for outdoor installation of the frequency
inverter are fulfilled.