Q48 — EDG KVAR Loading / Voltage Control
062000A4.07 (3.1)
Given:
• Unit 2 is at 100% Power.
• The 2A EDG is paralleled to the 2A 4KV Bus for Surveillance Testing in accordance with S2.OP-ST.DG-0001, 2A Diesel Generator Surveillance Test.
• Reactive load is 1200 KVAR OUT.
In accordance with S2.OP-ST.DG-0001, what action is needed to RAISE reactive load to 1400-1500 KVAR OUT?
• Unit 2 is at 100% Power.
• The 2A EDG is paralleled to the 2A 4KV Bus for Surveillance Testing in accordance with S2.OP-ST.DG-0001, 2A Diesel Generator Surveillance Test.
• Reactive load is 1200 KVAR OUT.
In accordance with S2.OP-ST.DG-0001, what action is needed to RAISE reactive load to 1400-1500 KVAR OUT?
A. Raise on the Speed Control Switch.
B. Lower on the Speed Control Switch.
C. Raise on the Voltage Control Switch.
D. Lower on the Voltage Control Switch.
▶ Show Answer & Explanation
✓ C. Correct. The voltage control switch is used to adjust KVAR load. To raise KVAR loading, the direction of the switch would be the raise direction. (see step 5.3.11 of surveillance)
✗ A. Incorrect. Plausible because the candidate may believe that because the speed control switch is used to adjust voltage once paralleled to the bus / grid that this would adjust KVARs in the correct direction.
✗ B. Incorrect. Plausible because the candidate may believe that because the speed control switch is used to adjust voltage once paralleled to the bus / grid that this would adjust KVARs in the correct direction.
✗ D. Incorrect. Plausible because it is true that the voltage control switch is used to adjust KVAR loading, but the candidate may confuse the required direction for KVAR OUT.
Ref: S2.OP-ST.DG-0001(Q), 2A Diesel Generator Surveillance Test | LO: N/A | Source: Salem Vision Database | Cognitive: Fundamental
Connections
- Related systems: EDGs, 4KV
- Related procedures: S2.OP-ST.DG-0001 — Emergency Diesel Generator Surveillance Test
- Related exam: 2020 NRC Written Exam