Hello everyone, I am in the process of recommissioning an old Control Cabinet and have equipped it with new control gear. I am eager to put it back into operation, but when I switch off the isolator on the Panel, it causes the 16A Breaker for the Socket it's connected to trip. I have thoroughly checked for Ground Faults and Short-circuits, but all seems to be in order. The isolator is a 4 Pole (3Ph + N) and the Plug wiring appears to be correct. The Cabinet contains a Simanics V20 VFD and Logo8 Controls, and the motor does not start when powered down, so there should not be any inductive kickback. The Trip Switch is a Hager ADM420c B20 - could it be that its tripping characteristics are not suitable? Any advice on this issue would be greatly appreciated. Thank you.
In some cases, the isolator may experience a delay in breaking or an early connection in the neutral. This can potentially cause disruptions to specific equipment. To troubleshoot this issue, consider testing by linking out or bypassing the neutral and observing the results.
You've clearly done great troubleshooting work so far! With the information you've provided so far, it does seem like the issue could be related to the breaker’s tripping characteristics, particularly if the Simanics V20 VFD is causing initial power surges that might exceed the 16A limit of the breaker. The Hager ADM420c B20 may not be tolerating that transient overload. You might try using a breaker with "D" curve characteristics which is designed to handle higher short-term surges, often used with inductive loads such as your VFD. Also, ensure all your connective wires are of appropriate gauge. Good luck!
Hi, your issue seems somewhat complex. One potential issue could be an overload condition – the breaker will trip if the power draw exceeds its rating. It's possible your newer gear is drawing too much current and exceeding the 16A Breaker's limit. Considering your Control Cabinet has a Simanics V20 VFD, an inrush current might occur at start-up and trigger the Breaker. About your suspicion on the Hager ADM420c B20 trip switch, it's possible but less likely; those switches are generally reliable. I'd recommend checking the current draw on your new gear and ensuring it aligns with your Breaker's capacity. If the problem persists, consider consulting with an electrician or field expert.
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Answer: - The breaker tripping issue could be due to various reasons, such as incompatible tripping characteristics of the Hager ADM420c B20 trip switch or potential wiring issues.
Answer: - The individual has checked for ground faults, short circuits, and verified the correct wiring of the isolator and plug, but the problem persists.
Answer: - The user mentioned that the motor does not start when powered down, indicating there should not be any inductive kickback. However, further investigation may be needed to rule out the control gear as the source of the problem.
Answer: - Suggestions could include checking the compatibility of the Hager ADM420c B20 trip switch, inspecting the wiring connections thoroughly, and seeking professional assistance if needed.
Answer: - Troubleshooting techniques may involve systematically checking components, verifying wiring connections, testing individual devices, and consulting with experts in electrical systems and equipment.
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