T Y P E CO CIRCU I T OP E N I N G R E LAY
4 . DE-ION CONTACTOR SWITCH (CS)
Adjust the core stop on the top as high as pos
sible without allowing the insulating bushing at the
bottom of the plunger to touch the Micarta angle. The
contact will be separated from the Micarta angle by
1/32" to 1 / 1 6 " . Adj ust the contact gap spacing to
slightly less than 1 / 1 6 of an inch . Bend down the
contact springs so that a firm contact is made but
not so strong that the minimum pick-up value can
not be obtained. The spring tension should be about
1 5 grams.
Hold the relay contacts closed and with an
auxiliary relay coil connected across terminals to
simulate the circuit breaker trip coil, note that the
contactor switch picks up on le ss than 4 amperes.
5. OPERATION INDICATOR (OI)
Pass sufficient current(a-c ) through the operati on
md1cator to just operate it.
This
val ue of current
s houl d not be greater than
3
am peres. The operation
mdicator target should drop freel y . To change pickup ,
adjust the core s crew.
1 6
6. INDICATING INSTANTANEOUS TRIP UNIT
(liT)
Tl1e making of the c ontacts and target indication
shoul d occ ur at approXImately the same mstant. P osi
tiOn the stationary contact for a minimum of
1/3 2 "
wipe . The bridging moving contact shoul d touch both
s tationary contacts simul taneo usly.
Appl y s uff1c1ent current to operate the
liT .
The
operatiOn i ndicator target s h oul d dro p free l y .
The nameplate data will furnish the actual cur
rent range that may be obtained from the
ITT
unit.
R E N E WAL P ARTS
Repair work can be done most satisfactorily at
the factory. However, interchangeable parts can be
furnished to the customers who are equipped for
doing repair work. When ordering parts , always giv e ,
t h e complete nameplate data.
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