Bryant ASPAS1BBA015 Manuale Utente Scaricare il pdf (Pagina 37)

Page 37

SECTION 2.4

DIAGNOSTIC TESTS

AC GENERATORS

TEST 4- FIXED EXCITATION TEST

/ROTOR AMP DRAW TEST

DISCUSSION:

Supplying a fixed DC current to the rotor will induce a

magnetic field in the rotor. With the generator

running, this should create a proportional voltage

output from the stator windings.

PROCEDURE:

1. Disconnect Wire 4 from the voltage regulator, 3rd

terminal from the top. See Figure 3.

2. Connect a jumper wire to the disconnected Wire 4 and

to the 12 volt fused battery supply Wire 15. (located at

15A fuse).

Figure 3. Voltage Regulator

3. Set VOM to AC volts.

4. Disconnect Wire 2 from the excitation circuit breaker

(CB2) and connect one meter test lead to that wire.

Disconnect Wire 6 from the voltage regulator and

connect the other meter test lead to that wire. (5th

terminal from top, double check wire number).

5. Set the AUTO-OFF-MANUAL switch to MANUAL. Once

the engine starts, record the AC voltage.

6. Set the AUTO-OFF-MANUAL switch to OFF. Reconnect

Wire 2 and Wire 6.

7. Disconnect Wire 11 from the voltage regulator and

connect one meter test lead to that wire. Disconnect

Wire 22 from the voltage regulator and connect the

other meter test lead to that wire (both wires are located

at the top two terminals of the voltage regulator, see

Figure 3).

PART 2

TEST 4 RESULTS - FIXED EXCITATION TEST/ROTOR AMP DRAW TEST

Results: Size ABCDEFGH

Voltage Results ALL Above 60 VAC Above 60 VAC Below 60 VAC Zero or Below 60 VAC Below 60 VAC Above 60 VAC Below 60 VAC

Wire 2 & 6 Residual Volts

Voltage Results ALL Above 60 VAC Below 60 VAC Above 60 VAC Zero or Below 60 VAC Below 60 VAC Above 60 VAC Below 60 VAC

Wire 11 & 22 Residual Volts

Static Rotor 6 & 7 kW 0.91-1.06A 0.91-1.06A 0.91-1.06A Zero Above 1.5A 0.91-1.06A Zero 0.91-1.06A

Amp Draw 12 & 12 kW 0.80A 0.80A 0.80A Current Above 1.3A 0.80A Current 0.80A

13 & 15 kW 0.64A 0.64A 0.64A Draw Above 1.1A 0.64A Draw 0.64A

Running Rotor 6 & 7 kW 0.91-1.06A 0.91-1.06A 0.91-1.06A Zero Above 1.5A 0.91-1.06A Zero Above 1.5A

Amp Draw 12 & 12 kW 0.80A 0.80A 0.80A Current Above 1.3A 0.80A Current Above 1.3A

13 & 15 kW 0.64A 0.64A 0.64A Draw Above 1.1A 0.64A Draw Above 1.1A

MATCH RESULTS WITH LETTER AND REFER TO FLOW CHART IN SECTION 2.3 “Problem 1”

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 143 144

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