UNIT
Current Polarization
6EK-49822
l
a. Connect per Fig. 24 of TEST CONNECTIONS.
close its contacts within.five percent of 0.5 ampere. The clutch
slip between 8-18 amperes. CAUTION: This level of current can overheat the
coil if applied too frequently or for too long a period of time.
Potential Polarization
a. Connect per Fig. 25 of TEST CONNECTIONS.
b..With V set for five volts at terminals 9 to
the unit should close its contacts
between
amps.
INSTANTANEOUS UNIT
Make sure that the instantaneous unit is in the correct range in which it is to
operate. See the internal connections diagram and Table 6.
Whenever possible,
use
the higher range since the higher range has a higher
continuous rating.
The instantaneous unit has an adjustable core located at the top of the unit. T
O
set
the instantaneous unit to a desired pickup, loosen the locknut and adjust the core.
Turning the core clockwise decreases the pickup, turning the core counterclockwise
increases the pickup. Bring up the current slowly until the unit picks up.
It may be
necessary to repeat this operation, until the desired pickup value is obtained. Once
the desired pickup value is reached, tighten the locknut.
CAUTION:
Refer to Table 6 for the continuous and one second ratings of the
instantaneous unit.
Do not exceed these ratings when applying current to
the instantaneous unit.
The range of the instantaneous unit (see Table 6) must be obtained between a core
position of
of a turn of full clockwise, and turns counterclockwise from
full clockwise position.
I N S T A L L A T I O N
The location should be clean and dry, free
dust and excessive vibration and
well lighted to facilitate inspection and testing.
MOUNTING
The relay should be mounted on a vertical surface. The outline and panel drilling
diagram is shown in Fig. 26.
*Indicates Revision
17
