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TESTS
PICK UP
With the unit connected for high range operation (parallel connections) and the target in the " Down"
;ition, check the pickup at the maximum calibration mark:
X.
1dble
TARGET AND SEAL-IN UNIT
The target and seal-in unit has an operating coil tapped at
from the factory with the tap screw in the lower ampere position.
the rjght hand stationery contact.
stationary contact and place it in the desired tap.
place it on the left hand stationary contact where the first screw was removed.
cedure is necessary to prevent the right hand stationary contact from getting out of adjustment.
should never be in both taps at the same time.
PICK-UP AND DROPOUT TEST
Connect relay studs
1.
box so that the current can be controlled over a range of
Turn the time dial to the
2.
1.
Increase the current slowly until the seal-in unit picks up.
Move the time dial away from the ZERO TIME DIAL position, the seal-in unit should remain in the picked
up position.
Decrease the current slowly until the seal-in unit drops out.
The following tests are to be performed at the time of installation.
TIME OVERCURRENT UNIT
1.
Set tap screw on desired tap.
Using the test circuit in Figure
Reduce the current until the light 1n series with the contacts begins to flicker. This value of current
is defined as pick up and should be within
2.
Check the operating time at some multiple of tap value.
tap rating or the maximum fault current for which the relay must coordinate.
the discretion of the user.
TARGET AND SEAL-IN UNIT
Make sure that the tap screw is in the desired tap.
Perform pick up and drop out tests as outlined in the Acceptance Test Section.
To change the tap setting, first remove one screw from the left hand
1
2
and
(See Internal Connections Diagram) to a D.C. source, ammeter and load
TIME
POSITION .
ZERO
DIAL
TAP
0.2
2. 0
IN STALLATION TESTS
13,
apply approximately twice tap value until contacts just close.
GEK-34055
the pick up should be within the limits in
TABLE X
0. 2
and
The tap screw is the screw holding
N ext remove the screw from the undesired tap and
0 . 1
to
2.0
See Table XI .
See Table XI.
TABLE XI
PICK-UP
DROPOUT
CURREN T
CURREN T
MORE
0. 15 - 0.195
.05
OR
1.50 - 1.95
. 55
OR toK>RE
of tap value.
5%
This multiple of tap value may be five times
10
2.0
amperes.
The relay is shipped
See Figure
2.
amperes.
The value used is left to
t
This pro
Screws
t
•
•
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