3.23
Date Code 20171021 Instruction Manual SEL-421 Relay
Testing
Technical Support
Step 7. Apply the sources to confirm operation of MBC2.
a. Apply the source test current by slowly increasing the magnitude
of I
B
.
b. Observe the
RELAY ELEMENT LCD screen.
Relay Word bit MBC2 asserts when |I
B
| 2.5 A, indicating that
the relay impedance calculation is less than the Z2MP reach
setting.
Technical Support
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