K
i,
I have a 132kw vector controlled VSD which was damaged when the motor it was driving at half load had a phase to phase short. Motor was burnt. I checked the specification of the inverter it has 4 times overcurrent protection.
Assuming all settings in the inverter is done correctly. It should have protected the VSD and motor from damages. But 2 out of 6 pieces of IGBT blown and 4 out of 6 fuses had blown.
My questions
1. VSD has overcurrent protection, does it include phase to phase short?
2. what about phase to earth short?
3. is this a VSD failure to protect the motor and itself?
I have a 132kw vector controlled VSD which was damaged when the motor it was driving at half load had a phase to phase short. Motor was burnt. I checked the specification of the inverter it has 4 times overcurrent protection.
Assuming all settings in the inverter is done correctly. It should have protected the VSD and motor from damages. But 2 out of 6 pieces of IGBT blown and 4 out of 6 fuses had blown.
My questions
1. VSD has overcurrent protection, does it include phase to phase short?
2. what about phase to earth short?
3. is this a VSD failure to protect the motor and itself?