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Non-Class Electrical Flashcards

1
Q

Rounds for Non-Class Switchgear Room?

A
  • Breaker Lights and Relay Flags
  • FBT available on NAN-S01 and S02
  • Equipment locker stocked and locked
  • Ground Faults on NKN-M45, M46
  • Battery fluid levels and 1 Battery Exhaust Fan
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2
Q

Fast Bus Transfer Occurs When…

A
  1. Bus xfr switch is in auto
  2. Generator trip has occurred
  3. Early B contact must be
    satisfied
  4. Synch check relay must be
    satisfied
  5. No bus lockout
  6. Voltage must be available
    on NAN-S03 & S04
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3
Q

NBN-S01/S02 Fast Bus Transfer When…

A
  1. Normal Service Transformer Fault
  2. Normal Supply Breaker Open
  3. Voltage sensed on opposite bus
  4. Synch check relay satisfied
  5. No lockout on ether bus
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4
Q

Red Light Out on Breaker Means?

A
  • If should be on, bulb is burnt out
  • If red light not lit, then trip circuit may not function
  • If green light is on, then red should not
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5
Q

How do you Verify All Grounds are Removed?

A
  • Open up the front door to make sure there is no grounding truck on top of the breaker
  • Open the back door to make sure there is no grounding strap still installed
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6
Q

Which batteries/battery chargers can supply NKN-M45/M46?

A
  • NKN-M45 can have E, E1 or EF battery charger

- NKN-M46 can have EF or F charger suppling it

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7
Q

Describe how to shift battery chargers

A
  • Make before break

- Parallel the chargers together then remove the first charger by opening the DC output and AC input breakers

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8
Q

Describe and explain the Light Indicators on a 4160 Breaker

A

Red: breaker closed with continuity through trip coil

Green: breaker open and racked in

Bright Green: breaker tripped on a fault or is in TEST position

White: 86 Lockout is reset

Clear: closing springs charged

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9
Q

What is the procedure for relay resetting? Describe main requirements

A
  1. CRS/SM, electrical maintenance, PR&C are all informed
  2. Identify the relay that needs resetting and follow the applicable appendix to reset
  3. An IV will be necessary
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10
Q

What equipment is affected by a loss of normal power to NKN-M46?

A
  • ESOP
  • EBOP
  • Main FW Pump “A”& ‘B’
  • Emergency LO Pump
  • NKN-D44 and D45
  • Normal and emergency access
    personnel air lock
  • Normal control power to NAN-S06 and
    alternate to S05
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11
Q

On a loss of normal power to NKN-M46, which 2 pumps should be last to turn off?

A

EBOP

ELOP

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12
Q

What is the difference between a soft and hard ground?

A

Hard Ground = < 3000 ohms
Soft Ground = > 3000 ohms
< 35,000 ohms

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13
Q

What is the procedure for minimizing breaker damage while racking?

A

01DP-0IS13 Electrical Safe Work Practices

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14
Q

What is the source of control power for the RCPs and CW pumps?

A

CW A and B – NKND41

CW C and D – NKND42

RCPs control power – NKND44

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15
Q

How do you Reset Thermal Overloads?

A

On MCC’s, there will be a black reset button on the front that you will press

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16
Q

Kirk Key interlock

A

NAN-S01/s02 supplies three load centers on one single breaker

On the load center itself, there is a disconnect. The B2 feeder breaker needs to be open and then a key that is in the breaker can be removed which locks the breaker open. The key can be put into the disconnect door to manually open the disconnect stabs

The aux and main stabs need to all come out ensuring the 13.8 kV is isolated from the load center to remove one load center from the others instead taking out all three load centers on the NAN breaker

OE on kirk key is the aux stab not coming apart on our SWYD load centers NGN-L43 L44

17
Q

NKN D panel Locations

A

NKND41 – turb 100’

NKND42 – aux 100’

NKND43 Turb 100’

NKND44 – in M46

NKND45 – in SSR room

NKND19 – chlorinator room cooling tower

18
Q

NNN D panel Locations

A

NNN-D11 and D12 : Control bldg. 120’

NNND15 – Turbine 100’

NNND16 – Aux 120’

19
Q

Loads on NAN-S01

A

RCP ‘A’ & ‘C’

CWP ‘A’ & ‘B’

3 NG Load Centers

NBN-S01 via Normal Service
XFMR NBN-X01

20
Q

Loads on NAN-S02

A

RCP ‘B’ & ‘D’

CWP ‘C’ & ‘D’

3 NG Load Centers

NBN-S02 via Normal
Service XFMR NBN-X02

21
Q

Loads on NBN-S01

A
  • Normal Chiller ‘B’
  • NC ‘A’
  • TC ‘A’
  • PW ‘A’
  • Htr Drn Tnk Pump ‘B’
  • Cond Pump ‘A’
  • Cond Pump ‘B’
22
Q

Loads on NBN-S02

A
  • Cond Pump ‘C’
  • Htr Drn Tnk Pump ‘A’
  • Normal Chiller ‘E02’
  • Normal Chiller ‘C’
  • PW ‘B’
  • TC ‘B’
  • NC ‘B’
23
Q

Loads on NKN-M45

A
  • NQN Inverter
  • NKN-D41
  • NKN-D42
  • NKN-D43
  • MG Tripping Circuit
  • MG BU Tripping Circuit
24
Q

Loads on NKN-M46

A
  • NKN-D44
  • NKN-D45
  • FP Turbine ‘A’ E Oil Pump
  • FP Turbine ‘B’ E Oil Pump
  • MT ESOP
  • MT EBOP
25
Q

Loads on NKN-D19

A

Cooling Tower Load Centers

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