SWYD Flashcards
How do the 500kv breakers operate?
Air to open/Spring to close
at what pressure will the 500kv breaker open?
182 psig
when does the compressor cycle on and off?
200-220 psig
what PPE is required while operating items in the switchyard?
- hardhat
- safety glasses
- rubber gloves
- leather outer gloves
- flame retardant suit
what is the voltage and frequencies range for the switchyard?
- 491 - 525 kv
- 112.125 - 120.25 kv
- 58.5 - 61.8 hz
In order, what are the preferred methods of operation for breakers in the switchyard?
- TOC or Control room
- relay house
- local at control
- Local manual (old style)
How are the 34.5 kv breakers operated?
Air to close/Spring to open
Whose permission is required to operate breakers in the switchyard?
Shift manager and CRS/TOC
What are some safety items to be aware of when operating disconnects in the switchyard?
Falling debris
steady deliberate motion
don’t look up
explain opening breaker ad disconnect including using kirk key
- open breaker
- open disconnect
- remove kirk key from disconnect
- install key in ground disconnect, close ground
How do you place ESF 12 onto 15AA with ESF 11 currently lined up to it?
turn on synchroscope to verify “IN SYNC” then close ESF 12 breaker and verify ESF 11 breaker opens
Why is 13R a dead bus transfer?
to prevent OVERLOADING the TRANSFORMER
If an ESF transformer locks out, what breakers open?
closest to the transformer (19 series) upstream and downstream
what breaker will LSS shed?
Local breaker at bus
What can be done if ST21 locks out and the generator starts, but output breaker doesn’t close?
do you need a synchroscope? why?
Close diesel output breaker of ESF 12 breaker
No, because the bus is de-energized
