TM 9-6115-668-13
b. Pull circuit board (16 to 19) out of voltage regulator housing (10):
Synchronizing Relay
TT1308-.01
(16)
Voltage Sensing Transformers
TT1309-./02
(17)
Voltage/Frequency Error Detection
TT1314-./01
(18)
Overcurrent/Rev. Power Detection
TT1313-./01
(19)
4. Remove complete safety device N3 (6):
a. Record labeling and position of cables and disconnect cables from terminals (9) of safety device N3 (6).
b. Remove nuts (8) and safety device N3 (6) from bolts (7). Discard nuts (8).
CAUTION
Perform ADJUSTMENT procedure after replacing parts.
1. Remove defective circuit board (16 to 19) out of safety device housing (10) and insert new board.
1. Adjust Overcurrent/Rev. Power Detection TT1313-./01 :
a. Connect load bank to generator set and perform procedures in paragraph 5.53.
b. Remove cover over socket terminals L1 to L3 and N in control cabinet as instructed in paragraph 5.24.
c. Connect X/Y-printer to threaded pins of terminals L1, L2, L3 and N.
d. On relay K12 (50, figure 5-19), attach a jumper between terminals 21 and 22.
e. Preset potentiometers (figure 5-30).
lmax
Rotate all the way clockwise (maximum 18 turns)
Delay I
Rotate all the way counterclockwise (maximum 18 turns)
PRmax
Rotate all the clockwise (maximum 18 turns)
Delay P
Rotate all the way counterclockwise (maximum 18 turns)
Offs.
Do not adjust (factory preset)
f. Start up Generator Set 150 kW as instructed in paragraph 2.5.1.
Set output parameters: P = 150 kW, IL = 520 A, cos cp = 0.8.
g. Adjust overload:
Increase inductive load at load bank to et current to 1.1 times rated value: IL = 572 A.
Slowly rotate imax potentiometer counterclockwise until OVERLOAD indicator H13 lights up on front panel
of control cabinet.
Turn delay I potentiometer four turns clockwise.
Reduce load at load bank and push OVERLOAD illuminated pushbutton switch S10 on front
Change 1
5-127
