BE1-46N Testing
5-1
I
N
TAP ADJUST value
I
2
pu
I
2
I
N
also, % I
2
(I
2
pu) (100 %)
Negative Sequence I
I
2
1
3
(I
A
.
2
I
B
.
I
C
)
I
2
pu
I
2
I
N
1
3(I
N
)
I
A
.
2
I
B
.
I
C
I
2
pu
1
3(I
N
)
I
A
.
2
I
B
.
I
C
I
2
pu
1
3(I
N
)
I
A
SECTION 5 • TESTING
GENERAL
Although the BE1-46N is designed to monitor three-phase currents, verification of the relay pickup and
dropout can be accomplished by using a single-phase source. To verify all three phases using a single-
phase current source, repeat the operational test procedure for each of the three phases.
TESTING
The test is divided into three different functional areas. The functional areas are:
&
Pickup and alarm
&
Timing
&
Max time
OPERATIONAL TEST PROCEDURE
Pickup and Alarm
Additional testing to verify trip and alarm circuit pickup and dropout may be implemented by changing the
PICKUP and ALARM thumbwheel settings. The procedures remain the same but the values differ. To
determine the correct values, the following formula and derivatives are given.
Equation A
If testing single phase (I
B
= 0, and I
C
= 0) then:
Equation B
Please note that the results obtained from these procedures may not fall within specified tolerances. When
evaluating results, consideration must be given to three important factors.
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