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5-2 BE1-87G - Testing And Setting
WARNING
During testing, do
NOT
apply or generate continuous operate current greater than three
amperes. If the operate current is greater than three amperes, a temperature increase
in the reactor may result and cause insulation breakdown.
NOTE
Because of the reactance of the stabilizing reactors, the burden may be too high for large
values of operate current with solid state test sets. Stabilizing reactor L1 may be shorted
out in single-phase relays by placing a jumper on TP-1 and TP-2 on the lower magnetics
shield board. The jumper should be capable of carrying five amperes of operate current.
Figure 5-2 shows the location of the lower magnetics shield board assembly and Figure
5-3 shows test point locations. In three-phase relays, current sources may be connected
directly to the upper and lower terminals (6-9 and 12-19) to bypass the external reactor
chassis.
OPERATIONAL TEST PROCEDURE
The following procedure verifies operation of the relay. Terminal numbers are referenced to the operational test
setup in Figure 5-1. Three-phase units may be tested one phase at a time because all phases are OR'd together
at the output.
Restraint current supplied to any one relay input must not exceed either of the following conditions.
10 amperes continuous or 250 amperes for 1 second (sensing input range one)
2 amperes continuous or 50 amperes for 1 second (sensing input range two)
Whenever this current level is exceeded, provisions must be made to cut off the sensing current as the relay
trips.
Figure 5-1. Operational Test Setup