A neighbour of mine has a workshop attached to his Bungalow that contains a Milling machine.
This are powered from a single to 3 phase rotary inverter.
The Bungalow is feed by a TT system with the normal 100mA RCD next to the CU thats fitted with cartridge fuses.
The workshop has its own CU with a 30mA RCD, feed from the house, the 30mA RCD and has been tested and passed with a RCD tester. I did notice however the workshop did not have its own earth rod.
When powering up the the Milling Machine from the inverter it trips the 100mA RCD, at the main CU, not the 30mA one in the workshop CU
It`s then a very long story of intense fault finding, with no evidence of obvious faults or earth leakage issues so it would appear their may be some incompatibility issue with the Inverter and the 100mA RCD.
My question is,
1. Has any one come across a RCD incompatibility problem with rotary inverters before .
2. The 100mA RCD at the CU has not been professionally tested, I assume this is the property of the electricity supplier, would they charge to test and replace it.
All information appreciated.
This are powered from a single to 3 phase rotary inverter.
The Bungalow is feed by a TT system with the normal 100mA RCD next to the CU thats fitted with cartridge fuses.
The workshop has its own CU with a 30mA RCD, feed from the house, the 30mA RCD and has been tested and passed with a RCD tester. I did notice however the workshop did not have its own earth rod.
When powering up the the Milling Machine from the inverter it trips the 100mA RCD, at the main CU, not the 30mA one in the workshop CU
It`s then a very long story of intense fault finding, with no evidence of obvious faults or earth leakage issues so it would appear their may be some incompatibility issue with the Inverter and the 100mA RCD.
My question is,
1. Has any one come across a RCD incompatibility problem with rotary inverters before .
2. The 100mA RCD at the CU has not been professionally tested, I assume this is the property of the electricity supplier, would they charge to test and replace it.
All information appreciated.