A
B R EAKER MOUNTED - R I G HT S I D E
B
EQU I PM E NT MOU NTED
FIG. 86
-
NEUTRAL SENSOR SECONDARY
DISCONNECT
Si nce the neutral sensor i s mounted separately
from the breaker, a d i scon nect means i s req u i red to
con nect its output to the breaker. F i g . 86 shows the
breaker and eq u i pment mou nted 4th w i re secondary
d i scon nect u sed with the M i c roVersaTri p system.
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 programmer harness from the ter
minal board, removing cable ties as necessary.
b) At the rear of the breaker, remove the two Allen 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 slipping 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. Tighten the
clamping bolt as follows:
AKR 30/30H 1 20 ± 1 0 in-lbs
AKR 50/50H 470 ± 1 0 in-lbs
A KRT 50/50H 4 70 ± 1 0 i n-lbs
AKR 30L 470 ± 1 0 in-lbs
e) When replacing the programmer harness to the
p hase sensors verify that the wind ing polarity is
maintained , white wire with ring terminal to COMMON
term inal (right hand term inal, see Fig. 83).
63
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