Chap 2.1

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What do you do if an unexpected metering indication is received

If an unexpected meter indication is received, review the procedure before continuing with the switching.
Why should banks be energized from the power supply side

Banks should be energized from the power supply side. The normal inrush (or excitation) current is often sufficient to cause a severe voltage disturbance to consumers if a bank is energized from load buses supplied by other banks
Why should you de-energize banks from the power supply (High-Side)

Large banks often have sufficient excitation current to cause deterioration of the low side circuit breaker contacts if the bank were to be deenergized from the low side
Why is it important to reduce the amount of time banks are //

Keep the length of time banks are in parallel to a minimum in order to reduce the amount of short circuit capacity.
True/False

Paralleling two circuits that are not in synch can cause severe "bumps" on the Transmission System. These bumps may include relay action loss of generator output, or disconnection of one or more utilities

True
What is the "Sync check" checking
The synchronism check ensures that the circuits are:
- In phase
- have the same frequency
- have comparable voltages
True/False

The running voltage is read from the bus side of the circuit breaker. The incoming voltage is from the line or bank side of the circuit breaker.

True
What is the maximum amount on either side of zero a CB can be closed when performing a sync check?
- It is acceptable to close the circuit breaker when the synchroscope is less than 18 degrees on either side
- of zero.
Why do we transfer VARS

This is done to reduce the impact to the system caused when VAR load is abruptly shifted from one bank to another.

Author

Benjammincash

356270

Card Set

Chap 2.1

Description

RS Bank Sw

Updated

2021-09-20T00:08:28Z

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