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4 Installation and Testing
NOTE
Several proprietary test sets are marketed which
combine the current source and timer, and include
other features to simplify setup.
Preliminary Steps
4. 7.2
1 .
With the connecting plugs removed , connect the unit as
shown in the following figure numbers:
1 st Digit of
Style Number Sensing Input Configuration
K
Single-phase
G
Three-phase
H
Three-phase-with-ground
X
Two-phase-with -ground
2 .
Insert the relay connecting plugs i f bench testing. I f relay is
installed, insert test plugs instead . Before applying power,
check that the Relay Fail contact is closed (terminals 1 1 and
1 2).
3.
Apply operating power at terminals 3 and 4 . Verify that the
POWER LED is lit, and that the relay disabled contact is
open.
4 .
Load 0 0 into the Phase Tap Cal register.
5.
Load 99 into the Time Dial register.
4.7.3
Time Overcurrent Pickup Test
The phase current pickup of the relay will be set at the factory
to operate on one of the two available ranges: HIGH or LOW. If
ground current is monitored, it will also be set for one of the two
ranges. Determine which range applies by noting the indication
of the tap range on the front panel. (One for phase and one for
ground.)
BUS
52
Figure
Number
B
A
LINE
8
9
Figure 8. Single-Phase Current Sensing Connections
1 0, 1 1
1 2
BUS
52
A
B
LINE
Figure 9. Three-Phase Current Sensing Connections
5 1
5 1
A
8
7
LEGEND
5 1
OVERCURRENT RELAY
C
5 2
POWER CIRCUIT BREAKER
51
5 1
A
8
7
5 1
5 1
B
1 5
5 1
5 1
c
1 8
-
LEGEND
C
5 1
OVERCURRENT RElAY
52
POWER CIRCUIT BREAKER
Page 2 1
A
B
c
A
B
c
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