RCS

Question 1

What are the three common RCS

Answer 1

Midpoint RCS
Paralleling Tie RCS
Generation RCS (RCSG)

Question 2

Must you disable LOV or time delay on RCS before paralleling or TIE?

Answer 2

Yes

Question 3

When should the RCS operate on LOV

Answer 3

between 30-35 secs maximum of 35 sec

Question 4

at what AC potential voltage loss will the LOV open the RCS

Answer 4

when AC voltage loss is between 30-40 percent of normal operating voltage

Question 5

Prior to removing any control panel fuse what must you do?

Answer 5

place the RCS in LOCAL NON AUTOMATIC or the RCS may operate

Question 6

when does the automatic circuit recloser operate

Answer 6

15 secs and 55 secs

Question 7

what are the two main reasons RCS beyond AR are equipped with LVA (low of voltage automatic) relay to non automatic

Answer 7

a. Permanent faults on the source side of the AR would result in an unnecessary automatic operation of the RCS device.
b. Field ARs are typically configured with a 30-second automatic reclose. To avoid subjecting the RCS device to fault current and energy beyond its design, a line section should never be tested unless the RCS device is fully open.