Red-D-Arc RDA150T3, Service Manual

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6-2 Generator
(1) Exciting Amperage
Amperage fluctuates based upon the winding temperature. Following is for reference only.
Frequency/Rated Output Load Exciting Amperage (Measured)
3-Phase 60Hz: 120 kW
No load 0.57A
Full load( power factor=1.0) 1.04A
(2) Resistance Value
Nominal resistance of the winding is tolerated within ± 10% at 32 ° F( 220
℃
) of the ambient temperature.
The resistance must be measured by low resistance tester. It can not be measured by multi-purpose
tester cause of index error.
Generator Exciter (Measured)
Stator Rotor Stator Rotor
Armature Exciter Winding J
－
K Armature
Between
T1-T4, T7-T10
T2-T5, T8-T11
T3-T6, T9-T12
- -
0.048
Ω
1.574
Ω
14.96
Ω
0.185
Ω
[Color Code]
(B) (W) (R) (G) (Y) (Br) (L) (Or) (Gr)
Black White Red Green Yellow Brown Blue Orange Gray
(3) Technical Specifications
It
e
ms
Article Method Condition to verify Criterion
C
h
e
c
k
b
e
fo
re
o
p
e
ra
ti
o
n
Shape, Dent, Blot
Visual
Inspection
No dent, blot and deformation
Coating No looseness
Joint Meet the criteria
Oil, Coolant Meet the required level
Wiring
Lead wires to be securely fastened
against
abrasion and damage to bring by
vibration
G
ro
u
n
d
in
g
Continuity Tester
“GROUNDING” is connected;
-with Engine (bolt for grounding)
-with Bed (bolt for grounding)
-with grounding for Receptacle
Continuity is to be confirmed
I
n
s
u
la
ti
o
n
C
h
e
c
k
Insulation Resistance
DC500V
Mega
Tester
Main Breaker ON.
1-phase breaker (50A) ON
1-phase breaker (20A) OFF
Disconnect one coupler from the
stator.
Voltage Selector: 480V (3-phase)
- Remove all output lines connecting
to “T10 & T11” in terminal rest.
- Remove the output line “T12” from
the terminal rest.
-Open a pc terminal in the output line
“U2” from the stator.
*Insulate all terminals after removal
Over 3MΩ
Dielectric Voltage Tester
AC2400V (1 sec)
Electric Current: 10mA
14