LOT 201.30 Offsite Electrical Flashcards Preview

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Flashcards in LOT 201.30 Offsite Electrical Deck (12)
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1
Q
  • LOT 201.30 Offsite Electrical*
    • *

Which switchyard lines are not allowed to be counted toward tech specs?

A
  • *Blessing 44 Line**
  • Limited capability to provide required voltage*
  • *138 KV Blessing Line**
  • Lines run below other lines*
  • *HILLJE 64 Line**
  • Lines run below other lines*
  • *HILLJE 44 Line**
  • Lines run below other lines*
2
Q
  • LOT 201.30 Offsite Electrical*
    • *

What provides control power for the Main Generator Breaker?

A

TB 250VDC 1A

  • Note:*
  • Control power for the 13.8 kV breakers will come from either 125VDC Bus 1A or 1B. (Non-Class 125VDC busses)*
3
Q
  • LOT 201.30 Offsite Electrical*
    • *

What will happen in the switchyard if a fault occurs on the standby transformer?

A
  • Unit 1:*
  • *All North Side breakers will trip**
  • Unit 2:*
  • *All South Side breakers will trip**
4
Q
  • LOT 201.30 Offsite Electrical*
    • *

What powers the 138 kV Emergency Transformer?

A

138 kV Blessing Line

Steps down voltage from 138 kV to 13.8 kV.

Can supply 1 ESF bus in each plant.

Note:
CP010 houses handswitch controls for the Emergency Transformer motor operated disconnect and the 13.8 kV feeder breaker to bus 1(2)K.

5
Q
  • LOT 201.30 Offsite Electrical*
    • *

What voltages are present on each side of the standby transformers?

A

345 kV / 13.8 kV

  • Note:*
  • CP010 houses handswitch controls for the 13.8 kV feeder breakers.*
6
Q
  • LOT 201.30 Offsite Electrical*
    • *

What voltages are present on each side of the UAT?

A

25 kV / 13.8 kV

  • Note:*
  • CP010 houses handswitch controls for the 13.8 kV feeder breakers.*
7
Q
  • LOT 201.30 Offsite Electrical*
    • *

Which 13.8 kV switchgears are normally powered from the standby transformers while at power?

A

1G STBY Bus

2G STBY Bus

Loss of North Bus starts SDG 12

Loss of South Bus starts SDG 22

8
Q
  • LOT 201.30 Offsite Electrical*
    • *

What is the purpose of a shunt reactor?

A

Compensate for line capacitance which can cause an elevated voltage during light load conditions.

9
Q
  • LOT 201.30 Offsite Electrical*
    • *

Where are the Unit 1 and Unit 2 standby transfomers powered from?

A
  • Unit 1:*
  • *North Bus**
  • Unit 2:*
  • *South Bus**
10
Q
  • LOT 201.30 Offsite Electrical*
    • *

Which switchyard breakers can be operated from the control room?

A
  • Unit 1:*
  • *Y510 / Y520**
  • Unit 2:*
  • *Y590 / Y600**

Isolates the Main Transformer from the switchyard.

  • Note:*
  • Visual Indication on CP007 AND CP010. Operable from CP007 ONLY.*
11
Q
  • LOT 201.30 Offsite Electrical*
    • *

What voltages are present on each side of the Main Transformer?

A

25 kV / 345 kV

  • Note:*
  • CP007 houses handswitch controls for the Main Generator Circuit Breaker and the applicable unit switchyard pneumatic circuit breakers.*
12
Q
  • LOT 201.30 Offsite Electrical*
    • *

Procedurally, what is the current rating of the standby transformer windings?

A

1621 Amps / Winding

Equivalent to 2 Aux Busses and all 6 ESF busses fully loaded.