2.2.1 Replacement Of Current; Sensors - GE AKR-30 Series Maintenance Manual

B R EAKER M O U N T E D - R I G HT S I D E
A
B EQU I P M E NT MOU NTED
FIG. 86 N E UTRAL SENSOR SECON DARY
-
DISCON NECT
Si nce t h e neutral sensor i s m o u n ted separately
from the breaker, a d i scon nect means i s req u i red to
con nect its o u t p u t to the b reaker. F i g . 86 shows the
b reaker and eq u i pment mou nted 4th w i re secon dary
d i scon nect u sed w i t h the M i c roVersaTri p syste m .
1 2.2.1 REPLACEM ENT OF CURRENT

SENSORS

Referring to Fig. 87, replacement of MicroVersaTrip cur­
rent sensors is accomplished as follows:
a) Disconnect the program mer harness from the ter­
m i nal board, removing cable ties as necessary.
b) At the rear of the breaker, remove the two Al len head
screws to separate the stud connector from the contact
pivot block.
. c) Loosen the clamping bolt and remove the stud con­
nector. Lift out the sensor and its tap terminal board.
The sensor may be prevented from s l i pping off the sen­
sor stud by adjacent accessories. If this exists, the sensor
stud must be removed from the breaker base. The stud
assembly is secured to the base with four bolts which are
accessible from the rear of the breaker.
d) When replacing the stud connector, tighten the
Allen head screw to 250 ± 1 0 in-lbs. Tig hten the
clamping bolt as follows:
AKR 30/30H 1 20 ± 1 0 in-lbs
AKR 50/5 0H 470 ± 1 0 i n - l bs
A KRT 50/50 H 4 70 ± 1 0 i n- l bs
A K R 30L 470 ± 1 0 i n-lbs
e) When re plac i n g the prog ram mer harness to the
p hase sensors verify that the wind i ng polarity is
m ai ntai ned , white wire with ring term i nal to COMMON
term inal (right hand term inal, see Fig. 83).
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