Switchboards

Question 1

Switchboard Groups

Answer 1

SG - Generator
SA - Stbd side
SB - Port Side
SP - Shore Power

10 Total Switchboards

Question 2

APD

Answer 2

SWBD Automatic Paralleling Device
Utilized for the main bus breakers to parallel two generators

Question 3

Positions of the APD

Answer 3

OFF, PERMISSIVE, RUN and TEST

PERMISSIVE (PERM): Phase (+/- 15 electrical degrees), freq. (+/- 0.2 Hz), Voltage (+/- 5%); breakers will be allowed to close by operator

RUN: Adjusts oncoming generator voltage and frequency to match bus conditions, and close designated breaker automatically

Question 4

Load Shed

Answer 4

Feature in the Distribution System to prevent overload
- Can be initiated by the Commercial Off The Shelf Multifunction Monitor (COTS MFM) or by watchstanders at the UCCs or SWBDs

Question 5

Load Shed

2 Stages of Load Shed

Answer 5

1. LS1 - 100% of rated load for 100ms
2. LS2 - 100% of rated load for additional 5 seconds, after LS1

Question 6

Switchboards

Switchboards associated with #1 GTG

Answer 6

1SG, 1SA, 1SB (Aux 1)

Question 7

Switchboards

Switchboards associated with #2 GTG

Answer 7

2SG, 2SA, 2SB (Main 2)
2SP (Shore Power)

Question 8

Switchboards

Switchboards associated with #3 GTG

Answer 8

3SG, 3SA, 3SB (3 Gen)