ABB 3HAC17346-1/01 M24 Type B motor
Electrical installationChapter overview
This chapter describes the electrical installation procedure of the DCS880.
WARNING
A qualified electrician may only carry out the work described in this chapter.
Follow the Safety instructions on the first pages of this manual. Ignoring the safety instructions can
cause injury or death.
Make sure that the drive is disconnected from the mains (input power) during installation.
If the drive was already connected to the mains, wait for 5 min. after disconnecting mains power.
Further information is available in the Technical guide.
Checking the insulation of the drive
Every converter has been tested for insulation between the main circuit and the chassis (2500 V rms
50 Hz for 1 second) at the factory. Therefore, do not make any voltage tolerance or insulation
resistance tests (e.g. hi-pot or megger) on any part of the converter. Check the insulation of the drive
as follows.
WARNING
Check the insulation before connecting the drive to the mains. Make sure that the drive is
disconnected from the mains (input power).
– Check that the motor cables are disconnected from the converter output terminals C1, D1, F+
and F-.
– Measure the insulation resistances of the motor cable and the motor between each circuit
(C1, D1) / (F+, F-) and the Protective Earth (PE) by using a measuring voltage of 1 kV DC.
The insulation resistance must be higher than 1 MOhm.

IT (ungrounded) systems
Don’t use EMC filters in IT systems.
The screen winding of existing dedicated transformers must be grounded.
For installation without low voltage switch (e.g. contactor, air-circuit-breaker) use an overvoltage protection on
the secondary side of the mains transformer.
The voltage shift of the isolated supply must not be larger than the voltage shift in case of an earth fault.
Supply voltage
Check supply voltages of:
Auxiliary voltage XAUX (X99) on SDCS-PIN-H01 /
SDCS-POW-H01
Cooling fan Terminals
Mains voltage for field circuit U1, V1, W1 (if used)
Mains voltage for armature circuit U1, V1, W1