Electrical

Question 1

What is DC power and what is the UH-60s main source of DC power

Answer 1

Direct Current; SLAB battery

Question 2

What are the GCUs, and what are their functions?

Answer 2

Generator Control Unit;

Voltage Regulation
Over Voltage 
Under Voltage (below 85% RPM R)
Current Limiting
Under Frequency (93% - 95% RPM R)
Feeder Fault

Question 3

What are the functions of the External Power Monitor Panel?

Answer 3

Over voltage
Under voltage 
Over frequency
Under frequency 
Proper phase rotation

Question 4

What are the priorities of power on the UH60?

Answer 4

1 - Main Generators
2 - APU Generator
3 - External Power

Question 5

How long will the SLAB battery run if AC power is lost in flight?

Answer 5

Day - 38 Minutes

Night - 24 Minutes

Question 6

Describe the specs of the Main AC Gens.

Answer 6

30/45 KVA
Cooled by XSMN oil
115/200 VAC, 3 Phase
400 Hz

Cannot run Blade De-ice with only one Gen operative

Question 7

Describe the specs of the APU generator.

Answer 7

20/30 KVA
Air cooled
115/200 VAC, 3 Phase
400 Hz

Cannot run Back-Up Pump and windshield anti ice simultaneously. BU Pump has priority.

Question 8

What causes #1 CONV or #2 CONV caution to illuminate?

Answer 8

No power output

Question 9

What do the #1 CONV, #2 CONV, AC ESS BUS OFF, and STABILATOR caution lights indicate?

Answer 9

Dual generator failure

Question 10

Where do the #1 GEN and #2 GEN lights get power from?

Answer 10

2 DC PRI BUS