09 PREVENTIVE AND CORRECTIVE MAINTENANCE
3BHS842007 E01 REV C
ACS6080
USER MANUAL
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Figure 9-8 Grounding switch grounded
7.
To open the doors of medium voltage units, continue with “9.4.4
Unlocking and opening the doors” on page 198.
Note:
To open the doors of medium voltage units, auxiliary voltage
is required.
8.
Switch off and lock out all auxiliary voltages from external sources.
9.
To connect a grounding set, continue with “9.4.8 Connecting a
grounding set” on page 204.
9.4.3
Grounding the drive when the grounding switch is not released
When the DC link of the drive has been discharged, the lamp
GROUNDING
SWITCH UNLOCKED
lights up to indicate that the grounding switch is
released and can be turned to the grounded position. If the lamp does not
light up, take the following steps.
1.
Check that the auxiliary voltage is switched on.
NOTICE
DO NOT use force for turning the grounding switch in
any direction
2.
Press the lamp cap to test the lamp.
• Lamp does not light up:
- Lamp is burnt out
- Lamp-test circuit is faulty.
The lamp-test circuit and the grounding circuit are independent of
each other. From the lamp not lighting up, it cannot be concluded
that the discharging circuit and / or the grounding circuit are
not working.
(1) White lamp
(2) Yellow lamp
1
2