Hi everybody,
We use tens of Broyce ELAM44V-30 Earth Leakage Relays in MCCs we supplied to the plant owner.
I tested all relays to confirm the tripping function by injecting current in the ZCT, and I confirmed all relays trip.
LED lamp indications were all correct.
However, some relays "TEST" button do not work. I tried to find what is wrong in connection, only to find all circuits are OK.
I exchanged the problem ones with new ELR units, however, the problem persisted. So, I guess relays were OK, but there were some wiring problems.
Until today I have not found any wiring errors.
If you same experience with Broyce ELR, please let me know the how did you fixed this issue.
The problem is only "TEST" button. Other functions are correct.
Regards.