Date Code 20010731
Breaker Logic
3-49
SEL-352-1, -2 Instruction Manual
Current After MOD Trip
CAMT asserts if any phase 50MN element is picked up or if the MOD status MODST input is
asserted when the 62M3 timer of the lockout relay control logic expires.
Figure 3.34: Current After MOD Trip
MOD Contradicts Current
MCC asserts if any phase 50MD element is picked up and the MOD Status (MODST) input does
not assert, indicating that the MOD is open.
Figure 3.35: MOD Contradicts Current
Slow Trip
ST asserts if the A-, B-, or C-phase 50MN element is still picked up when SlowTr time expires
following the A-, B-, or C-phase trip input assertion, respectively. The SlowTr timer resets when
50MNA drops out.
Figure 3.36: Slow Trip
Содержание SEL-352-1
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