Sinamics Perfect Harmony Gh180 6Sr41 Manufactured In Nma Nuernberg, Germany - Siemens GH180 Operating Instructions Manual

Handling Blocking Failure Faults
Blocking failures occur when IGBTs short due to perforation of their junction caused by
excessive current, i.e. high current density. This may be a result of out of saturation conditions
and frequent trips. The device will need to be replaced when the cell is removed for service.
A defective gate driver may be the root cause. A faulty CCB or bad data from the CCB could
give a faulty indication of this fault.
Course of Action
● Replace damaged or defective parts.
Handling Switching Failure Faults
Switching failures occur when a device opens or fails to turn on. It could also be caused by a
defective gate drive or a damaged device. Also, a defective CCB or modulator board could
give a faulty indication.
Course of Action
● Replace defective parts.
Handling AC Fuse(s) Blown Faults
These faults are caused by the blowing of the power fuses on the front end of the cell.
Course of Action
Check the fuses and replace any that are blown—more than one could be out. Replace
defective or damaged parts.
Handling Control Power Faults
This fault is caused when one or more of the control fuses that supply power to the CCB are
blown. This is rarely seen because the CCB is supplied by two circuits: the control power supply
bridge and the DC link. If Control Power Fault is observed, the AC fuses might also be blown.
Course of Action
● Replace the defective or damaged parts.
Handling Q1-Q4 OOS (Out Of Saturation) Faults
Out of saturation faults occur when the transistor junction is depleted of charge carriers
resulting in a higher junction resistance. This in turn created a larger voltage drop and more
losses in the transistor which can lead to premature failure. The cause of the OOS can be a
defective gate driver board or a high di/dt transition on the device. The gate board is designed
with circuitry to detect the larger voltage drop when the device should be on, shutting down
the device in a fault condition. The fault can also be caused by a defective CCB or noise on
the CCB.
Course of Action
● The exact cause needs to be determined before pulling a power cell out of service.

SINAMICS PERFECT HARMONY GH180 6SR41 manufactured in NMA Nuernberg, Germany

Operating Instructions Rev.201706301306
8.3 General Troubleshooting Information
Operation
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