Goodrive300-LIFT series inverter
Peripheral optional parts
-162-
Terminals P1, (+), PB and (-) connects the DC reactor options and parts.
D.4.3 Routing the cables
Route the motor cable away from other cable routes. Motor cables of several inverters can be run in
parallel installed next to each other. It is recommended that the motor cable, input power cable and
control cables are installed on separate trays. Avoid long parallel runs of motor cables with other
cables to decrease electromagnetic interference caused by the rapid changes in the inverter output
voltage.
Where control cables must cross power cables make sure that they are arranged at an angle as near
to 90 degrees as possible.
The cable trays must have good electrical bonding to each other and to the grounding electrodes.
Aluminum tray systems can be used to improve local equalizing of potential.
A figure of the cable routing is shown below.
Cable arrangement distances
Input power cable
Control cable
Control cable
Motor cable
Motor cable
Power cable
Min. distance:
200 mm
Min. distance: 500 mm
Min. distance:
300 mm
D.4.4 Insulation checking
Check the insulation of the motor and motor cable as follows:
1. Check that the motor cable is connected to the motor and disconnected from the inverter output
terminals U, V and W.
2. Measure the insulation resistance between each phase conductor and the protective earth
conductor using a measuring voltage of 500 V DC. For the insulation resistance of other motors,
please consult the manufacturer's instructions.
Note
: Moisture inside the motor casing will reduce the insulation resistance. If moisture is suspected,
dry the motor and repeat the measurement.
D.5
Breaker and electromagnetic contactor
It is necessary to add fuse for the avoidance of overload.
It is appropriate to use a breaker (MCCB) between the AC power supply and inverter. The breaker
can be locked in the switch-off position. The breaker capacity should be within 1.5-2 times the inverter
rated current.
