means of the rear mounting stud or studs for projection
mounting.
Either a mounting stud or the mounting screws may
be utilized for grounding the relay. The electrical connections
may be made directly to the terminals by means of screws for
steel panel mounting or the terminal studs furnished with the
relay for thick panel mounting. The terminal studs may be
easily removed or inserted by locking two nuts on the stud
and then turning the proper nut with a wrench.
For detailed information, refer to I.L.
41-076.
ADJUSTHENT AND M.<\INTENANCE
The proper adjustments to insure correct operation
cr
this
relay have been made at the factory. Upon receipt of the relay,
no customer adjustments, other than those covered under "SETTINGS,"
should be required.
_Check
The following check is recommended to insure that the relay is
in proper working order:
1.
Contact Gap - ThP- contact gap should be approximately
. 030".
2.
Dropout Voltage - The dropout voltage of the undervoltage
relay can be checked by applying
120
volts and then
decreasing this voltage to approximately
100
volts. The
moving contact should make with the right hand stationary
contact within
�
2%
of this value� Greater accuracy can
be obtained by pre-heating the relay at normal line
voltage for approximately one hour.
Close the main relay contacts and pass sufficient d-e current
through the trip circuit to close the contacts of the
res.
This value of current should be between
1
and
1.2
amperes.
The indicator target should drop freely.
- 4-
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