Exciter Field Current Measurement (No Load) - MULTIQUIP DCA Series Service And Troubleshooting Manual

EXCITER FIELD CURRENT MEASUREMENT ( NO LOAD )
EXCITER FIELD CURRENT MEASUREMENT
(NO LOAD)
1. With the engine OFF, place the voltage selector
switch (Figure 41A) in the 1-Phase, 240/120V position.
2. If equipped, set engine speed switch to the low position
(idle).
EXAMPLE:
DCA-25SSIU4F
A
3 PHASE
240/139
3 PHASE 1 PHASE
480/277
240/120
PRESS TO LOCK
PAGE 40 — GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23)
WHITE
3
C J A
D
CN1
CN2
Figure 41. Exciter Field Current Measurement (No Load)
3. Start the engine.
4. If equipped, place engine speed switch in the high
position and run the engine at full rpm.
5. Place ammeter clamp around pin K on the 6-pin plug
as shown in Figure 41B.
6. Verify that the exciter field amperage (no load) reading
is within range as referenced in Table 7 , column A.
RED
ORANGE
2 1
CN5
K B
CN4
BLUE
CN3
AVR
YELLOW
GRAY
B
MEASURE .067 AMPS
AMMETER CLAMP
CONNECT TO PIN K
ON CN1/CN5