
Operation Manual 37107F
MFR 3 - Multi Function Relay
Page 36/165
© Woodward
Activation of the Circuit Breakers
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Operating Sequence for the MCB
Figure 4-2 represents the switch behavior for the following settings:
MCB open via "Enable MCB": ON
Additional information can be obtained from the descriptions of the configuration screens.
1
3
2
4
'Command: close
MCB' (16/17)
Time/s
Time/s
Time/s
Release
MCB (53/7)
'Reply: MCB is
open' (54/7)
Connection time MCB
Figure 4-2: Activation of the circuit breakers - MCB
ON/OFF switching pulse:
1
Synchronization
2
close MCB:
2
closing pulse for the MCB energized
3
breaker inherent delay
4
closing pulse de-energized