GE AKR-30 Series Maintenance Manual page 241

A B R EAKER MOUNTED - R I GHT S I D E
8
EQU I PM E N T MOU NTED
FIG. 86 - N E UTRAL SENSOR SECONDARY
DISCONN ECT
S i n ce t h e neutral senso r is m o u n ted separately
from the b reaker, a d i sconnect means i s req u i red to
con nect its o u t p u t to the breaker. Fig. 86 s hows the
b reaker and e q u i pment m o u nted 4th w i re second ary
d i scon nect u sed w i t h t h e M i c roVersaTri p system.
REPLACEM ENT OF CURRENT
1 2.2.1
SENSORS
Referring to Fig. 87, replacement of MicroVersaTrip cur­
rent sensors is accompl ished as fol lows:
a) Disconnect the programmer harness from the ter­
minal board , removi ng cable t ies 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 c lamping bolt and remove the stud con­
nector. Lift out the sensor and its tap terminal board.
The sensor may be prevented from sli pping off the sen­
sor stud by adjacent accessories. If this exists, the sensor
stud m ust be removed from the breaker base. The stud
assembly is secured to the base with four bolts which are
accessi ble from the rear of the breaker.
d) When replacing the stud connector, tighten the Al len
head screw to 250 ± 10 i n-lbs. Tighten the clamping bolt
as follows:
AKR 30/30H 1 20 ± 1 0 in-lbs
AKR 50/50H 470 ± 1 0 in-lbs
AKRT 50/50H 470 ± 1 0 in-lbs
e) When replac i ng the programmer harness to the
phase sensors verify that the winding polarity is maintain­
ed , white wire with ring term inal to COMMON termi nal
(right hand term inal, see Fig. 83).
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