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ground fault protection for Sinamics G120P

8/8/2016 4:53 PM	Rate (0)
frankiep Posts: 1 Rating: (0)	hello, my company was called to expand an electrical panel where there are several inverter sinamics g120. we substitute no. 3 inverter 7.5 kW inverter with no. 3 to 30 kW (their pumps were also changed). To protect the supply lines of the inverters we installed no. 3 5SY43638 (circuit breaker) and 3 5SM26358 (RCD). These RCD are 3P 63A 0.3A type A. The problem is that when the inverter exceeds a certain threshold (about 80%) the RCD open the circuit. Why is this happening? I have to change the type of RCD? Which one should I use?
frankiep Posts: 1 Rating: (0)
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8/8/2016 6:40 PM	Rate (0)
Ste39 Platinum Member Joined: 1/21/2013 Last visit: 11/20/2024 Posts: 4620 Rating: (710)	frankiep hello, my company was called to expand an electrical panel where there are several inverter sinamics g120. we substitute no. 3 inverter 7.5 kW inverter with no. 3 to 30 kW (their pumps were also changed). To protect the supply lines of the inverters we installed no. 3 5SY43638 (circuit breaker) and 3 5SM26358 (RCD). These RCD are 3P 63A 0.3A type A. The problem is that when the inverter exceeds a certain threshold (about 80%) the RCD open the circuit. Why is this happening? I have to change the type of RCD? Which one should I use? Hello frankiep, Go to page 24 if can help you: Power Module PM230, IP20/ Durchstecktechnik (engl.) - Siemens

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This contribution was helpful to 1 thankful Users Gordon Shumway