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JUPITER-(3000K, 6000K, 9000K)-H1 Smart
Transformer Station
User Manual
Alar
Alarm
m ID
Name
2391
PID-
induced
ACB
Tripping in
Low-
Voltage
Cabinet A
Issue 02 (2023-09-30)
Alarm
Possible Cause
Severity
Major
Cause ID = 1
1. The system-to-
ground impedance
alarm threshold of the
anti-PID device is set
too high.
2. The system-to-
ground insulation
capability of the
system has decreased.
Copyright © Huawei Technologies Co., Ltd.
6 System Maintenance
Suggestion
1. Check whether the "System-to-
Ground Resistance Alarm Threshold"
is set properly for the anti-PID device.
2. Check whether the "Low Insulation
Resistance" and "Abnormal Residual
Current" alarms are generated for
the inverters or PCSs in the array.
3. Disable the "Trigger ACB tripping
upon IMD alarm" function of the
anti-PID device, and then turn on the
ACB in low-voltage cabinet A. 4.
Disconnect the MCCBs in low-voltage
cabinet A one by one. If the "System-
to-Ground Resistance Alarm" of the
anti-PID device is cleared, locate the
faulty point (devices that generate
alarms in step 2 are more likely to be
faulty).
5. Check whether condensation,
cable damage, or build-up of
contaminating particles exists on the
surface of the busbar frame/
insulator. If yes, cut off the power
and rectify the fault.
6. After the fault is rectified, restore
the original setting of "Trigger ACB
tripping upon IMD alarm" on the
anti-PID device.
If the fault persists, contact the
vendor or technical support.
148
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