Why do most of the TC supervision circuits wire up the B coil in series with the A coil too? Can we not wire the B coil independantly, ( With its own true positive supply ) ofcourse in series with a 52b contact to have the same funcionality? Is there any advantage for making the coils A & B in series for the pre-close tc supervision scenario? A reply would be greatly appreciated! Thank you! (i find that it helps to monitor some of the wiring portion also?)
Hi Rajesh, We can just use the A coil to monitor the circuit and some simpler schemes do this, but this limits you to only monitoring the integrity of the trip circuit when the circuit breaker is closed ( when it’s open the auxiliary switch in series with the trip coil disconnects the negative side of the A coil ) In most HV substations you don’t want to close the circuit breaker if you can’t trip it so we want to know the trip circuit is healthy in both the open & closed positions. Hope this helps Steve
Hi, Go to the Udemy website, search for courses under my name ( Stephen brooks ) & use the voucher code KHAL1001 to get them for $9.99, vouchers expire in 5 days. Regards Stephen Brooks
Super explanation
Thankyou your animation videos are very helpful
You're very welcome!
TRIP SUPERVISION RELAY: th-cam.com/video/qVdAdEiuMMc/w-d-xo.html
Why do most of the TC supervision circuits wire up the B coil in series with the A coil too? Can we not wire the B coil independantly, ( With its own true positive supply ) ofcourse in series with a 52b contact to have the same funcionality? Is there any advantage for making the coils A & B in series for the pre-close tc supervision scenario? A reply would be greatly appreciated! Thank you! (i find that it helps to monitor some of the wiring portion also?)
Hi Rajesh,
We can just use the A coil to monitor the circuit and some simpler schemes do this, but this limits you to only monitoring the integrity of the trip circuit when the circuit breaker is closed ( when it’s open the auxiliary switch in series with the trip coil disconnects the negative side of the A coil )
In most HV substations you don’t want to close the circuit breaker if you can’t trip it so we want to know the trip circuit is healthy in both the open & closed positions.
Hope this helps
Steve
@@Electricalsteve Thank you :)
why does C coil terminal have positive written. it should be negative.
Hi Mark,
I don’t see any positive symbol on the C coil terminal ( there are no markings at all? )
Steve
@@Electricalsteve coil C supplied by red (+Ve) and blue (+Ve) too. should it be blue (-Ve)?
ping!
Sir provide the circuit descriptions in detail
Sahil Shukla i
SIEM999 code doesn't work.
Hi,
Go to the Udemy website, search for courses under my name ( Stephen brooks ) & use the voucher code KHAL1001 to get them for $9.99, vouchers expire in 5 days.
Regards
Stephen Brooks