ABB ACS2000 AFE 2MVA, User Manual

Page: 39 / 181

39 ACS2000 AFE 2MVA UM 3BHS355653 ZAB E01 REV. H
Grounding switch
The grounding switch is a safety device that
enables safe access to the AFE-INU compartment
of the drive.
When the switch is in position grounded, input fil-
ter
(1) AFE (2) , DC link (3) , INU (4) and output filter
(5) of the drive are connected to the PE ground bus
(6) .
The switch is electromechanically interlocked with
a discharge monitoring circuit that prevents clos-
ing of the switch while the DC link capacitor is still
charged.
Grounding the drive is only possible after the main
power supply has been disconnected and the DC
link has discharged. When the voltage is below 50 V
(DC), press the pushbutton
Grounding Switch
Unlocked
(1) located on the control compartment
door (the pushbutton lights up) and - at the same
time - turn the grounding switch to the position
grounded (2).
When the grounding switch is in position
grounded , the door safety switch of the AFE-INU
compartment will be released and the door can be
opened.
—
References
—
2-9 Grounding switch
—
2-10 Grounding circuit
—
2-11 Grounding the drive
—
2-9
—
2-10
1
2
3
4
5
6
—
2-11
Grounding switch
Fault
1
2