Bosch 4306 Service Manual download pdf (Page 19)

• DOK-POWER*-KDV*2.3****-ANW1-EN-E1,44 • 06.97

3. Guidelines for installation and electrical connections

3.11. Fault current protective device

Capacitive discharge currents always flow to earth in switch-mode drive

controllers.

The extent of the discharge current is dependent upon:

• the number of drive controllers used,

• the length of the motor power cable, and,

• the ground conditions at installation site.

The discharge current is unavoidably increased, if measures are taken to

improve the electromagnetic compatibility (EMC) of the machine (mains filter,

shielded cables).

FI-current limiting type circuit breakers with a nominal fault current of less than

0.3 A should not be used!

The switching on of inductors (transformers, contactors, electromagnetic

values) can cause false tripping.

The safety of electronic equipment with threephase bridge

connections (B6 switches) cannot be guaranteed if commercial,

pulse-current sensitive FI protective circuit breakers are used. For

this reason, FI circuit breakers should not be the only safety

measure taken.

Discharge current

3.12. Checking the control cabinet

Only those voltages outlined in the data sheets or in the interface

descriptions should be connected!

Before performing any high voltage test on the cabinet, remove all

connections to the KDV 2.3!

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Bosch 4306 Service Manual Page 19