ABB ACS800-104

Electrical installation
50
Note: The optical components (transmitter and receiver) on a fibre optic link must be
of the same type.
Plastic optical fibre (POF) cables can be used with both 5 MBd and 10 MBd optical
components. 10 MBd components also enable the use of Hard Clad Silica (HCS
®
)
cables, which allow longer connection distances thanks to their lower attenuation.
HCS
®
cables cannot be used with 5 MBd optical components.
The maximum lengths of fibre optic links for POF and HCS
®
cables are 20 and 50
metres respectively.
HCS
®
is a trademark of SpecTran Corporation.
Checking the insulation of the assembly
Every ACS800-104 inverter module 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 the inverter units or modules. Check the insulation of the assembly as follows.
WARNING! Check the insulation before connecting the drive to the main supply.
Make sure that the drive is disconnected from the mains (input power).
1. Check that the motor cable is disconnected from the drive output terminals U2,
V2 and W2.
2. Measure the insulation resistances of the motor cable and the motor between
each phase and the Protective Earth by using a measuring voltage of 1 kV DC.
The insulation resistance must be higher than 1 Mohm.
PE
ohm
M