bindem
Member
- Location
- Westlake, LA
- Occupation
- Engineer
I have a MCC with a 600A MCCB breaker with a 310 digitrip unit which powers 3 motors: 100Hp, 150Hp, 200Hp.
We can run the 100 with the 150 no issues. When we try to start the 200, the 600A breaker trips pretty quickly.
We can run the 100 with the 200 no issues. When we try to start the 150, the 600A trips pretty quickly.
Looking at the TCC, it doesn't seem like the locked rotor current plus the FLA of the running motor doesn't get anywhere close to reaching the trip threshold.
Looking for help digging into this issue. I am a new engineer and not really sure where to start. Thanks in advance
We can run the 100 with the 150 no issues. When we try to start the 200, the 600A breaker trips pretty quickly.
We can run the 100 with the 200 no issues. When we try to start the 150, the 600A trips pretty quickly.
Looking at the TCC, it doesn't seem like the locked rotor current plus the FLA of the running motor doesn't get anywhere close to reaching the trip threshold.
Looking for help digging into this issue. I am a new engineer and not really sure where to start. Thanks in advance
