Grounding Switches Are Not Released - ABB ACS5000 User Manual

Chapter 10 - Preventive and corrective maintenance
Grounding
10.6.4

Grounding switches are not released

10-22 (36)
If the lamp is on, continue with Grounding.
If the yellow lamp is not on, continue with
are not released.
7 If the yellow lamp GROUNDING SWITCH UNLOCKED is on, turn the
grounding switches to the grounded position.
When the grounding switches are in the grounded position, the CDP
control panel shows the following:
1 L ->
StateINU
MOTOR SP
POWER
8 If necessary, open the doors of medium voltage compartments.
To open the doors of medium voltage compartments, auxiliary
voltage is required.
9 Switch off and lockout all auxiliary voltages from external sources.
10 Verify that the drive system is de-energized.
11 To connect a grounding set, continue with
grounding set.
When the DC link of the drive has been discharged, the lamp
GROUNDING SWITCH UNLOCKED lights up to indicate that the
grounding switches are released and can be turned to the grounded
position. If the lamp does not light up, proceed as follows:
1 Do not force the grounding switches in any direction.
2 Check the discharging level of the DC link.
If the value of parameter 2.01 DC VOLTAGE is below 50 V, the DC
link is discharged.
(For information on viewing actual values, see
mode.)
3BHS221906 ZAB E01 Rev. D
600.0 rpm
DCGnd NOpen
0.00 rpm
0.0 kW
ABB
10.6.4 Grounding switches
DCGnd Nopen
NotReadyOn
AFE NotRdy
10.6.5 Connecting a
9.5 Actual signals
5k A UM