WiringBoy
Electrical
- May 10, 2011
- 32
Hi
I have a ABB R-Mag 27 kV Outdoor breaker. Relay is SEL 451. I have been told by ABB that tripping current for the breaker ED2 motherboard is 20 mili Amps.
Relay is 120 ft away from the breaker wired through a 125 VDC 10C #10 AWG conductor.
I am using standard output contacts, which the SEL manual qualifies as the following:
"The Standard control outputs are “dry” Form A contacts rated for tripping duty. Ratings for Standard outputs are 30 A make, 6 A continuous, and 0.5 A or less break (depending on circuit voltage). Standard contact outputs have a maximum voltage rating of 250 Vac/330 Vdc. Maximum break time is 6 ms (milliseconds) with a resistive load. The maximum pickup time for the Standard control outputs is 6 ms. "
I am just curious rather I would say in a dlimena, Should I just use these Standard contacts described above with breaking capacity of .5 Amps or I should use High Interupting contacts which has a breaking current capacity of 10 Amps.
I was just shying away from using High interupting contacts due to electronics associated with this contact which has a leakage current of approx. 10 micro amps.
Now Standards contacts have been wired, Do you think that I need to go back and rewire with High interupting contacts or standard contacts is ok.
Just a quick note, In this schematics, because of low trip amperage, 52A is not wired in series with virtual trip coil.
I would appreciate your input.
I have a ABB R-Mag 27 kV Outdoor breaker. Relay is SEL 451. I have been told by ABB that tripping current for the breaker ED2 motherboard is 20 mili Amps.
Relay is 120 ft away from the breaker wired through a 125 VDC 10C #10 AWG conductor.
I am using standard output contacts, which the SEL manual qualifies as the following:
"The Standard control outputs are “dry” Form A contacts rated for tripping duty. Ratings for Standard outputs are 30 A make, 6 A continuous, and 0.5 A or less break (depending on circuit voltage). Standard contact outputs have a maximum voltage rating of 250 Vac/330 Vdc. Maximum break time is 6 ms (milliseconds) with a resistive load. The maximum pickup time for the Standard control outputs is 6 ms. "
I am just curious rather I would say in a dlimena, Should I just use these Standard contacts described above with breaking capacity of .5 Amps or I should use High Interupting contacts which has a breaking current capacity of 10 Amps.
I was just shying away from using High interupting contacts due to electronics associated with this contact which has a leakage current of approx. 10 micro amps.
Now Standards contacts have been wired, Do you think that I need to go back and rewire with High interupting contacts or standard contacts is ok.
Just a quick note, In this schematics, because of low trip amperage, 52A is not wired in series with virtual trip coil.
I would appreciate your input.