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Category 3 Safety Circuit with a VFD
jraef thanks for the information. I contacted Rockwell and they informed me that the drive with safe-off option is Catergory 3 compliant. The design I'm implementing will use an isolating safety contactor between the drive and motor also with a disconnect switch. There are few parameters in the...- Dave B
- Post #6
- Forum: Electric motors & generators engineering
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Category 3 Safety Circuit with a VFD
Thank you Brian. I live in the U.S. I originally designed the motor circuit with one safety contactor between motor and drive and the safety relay contacts drive control inputs and safe off inputs. I will reach out to the drive manufacturer and see what they recommend.- Dave B
- Post #4
- Forum: Electric motors & generators engineering
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Category 3 Safety Circuit with a VFD
I have a light curtain project and I'm using a Rockwell CR30 Programable Safety Relay. I will have the double contact safety switches and all. I know I need to have 2 safety contactors before the motor. My question is the motors are driven by PowerFlex 40 drives with the Safe Off feature. Do I...- Dave B
- Thread
- Replies: 5
- Forum: Electric motors & generators engineering
