78
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
Example of customized interlocking
Fig. 5.2.1.-5 Example of interlocking
The AND gate becomes an OR function by inverting the digital inputs in the general
digital input settings menu. Thus any of the connected fault signals can disable
closing of the circuit breaker.
DC pos. close =
station L/R-switch
in remote
ES pos. open =
Earth switch open
&
Interlocking_D
= Close enable
Logic input 1 = SF6 gas alarm
&
Interl5
&
Logic input 2 = Spring not charged
Logic input 3 = Manual stop
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