Electrical System

Question 1

AC ESS BUS has been replaced with what on the UH60M?

Answer 1

AC Reference BUS

Question 2

What is new with the AC reference BUS?

Answer 2

Additional 26 volt autotransformer added for system redundancy

Question 3

If one autotransformer fails?

Answer 3

AC reference bus degraded advisory

Question 4

200 amp DC converters have been replaced by what?

Answer 4

400 amp DC converters

Question 5

What is different with the DC and battery portion of the electrical system on the UH60M?

Answer 5

2 batteries. Additional BATT BUS, BATT UTIL BUS, DC ESS BUS.

Question 6

The two SLAB batteries provide for uninterrupted power to essential systems for how long?

Answer 6

15 minutes

Question 7

Can one of the batteries power the other batteries batt and dc ess bus?

Answer 7

yes

Question 8

How many battery junction boxes are provided?

Answer 8

2

Question 9

Where is the no. 2 batt junction box located?

Answer 9

Under the pilot’s seat.

Question 10

Where is the no. 1 batt junction box located?

Answer 10

Avionics nose tunnel

Question 11

The generator is the same as used in the A/L. What are the output specifications redefined to?

Answer 11

20/23.8 KVA continuous.

Question 12

When only battery power is available,_______ charged batteries will provide _____________ of power at night assuming all dc electrical equipment is left on and used, including the searchlight. The battery life will be increased by turning off unnecessary equipment.

Answer 12

80%, 12 minutes

Question 13

Cold start capsules can be used for?

Answer 13

Checking battery status.