Basler Electric BE1-851 - Manual (Page 218)

detect when the relay is out of service for test. This enables the backup logic and enhances security. It
should be noted that if the test mode logic is modified in this manner, it is not possible to differentiate
between the relay being out for service for test and a problem in the circuit breaker trip circuit. Otherwise,
the internal breaker failure function block would be disabled during a known problem in the trip circuit.
Figure 8-16. Trip Circuit Continuity and Voltage Monitor
Close Circuit Monitor
A close circuit monitor is not included in any of the preprogrammed logic schemes. This function may be
added by using a 62 function block and a contact sensing input (INx) to monitor the close circuit. The logic
is shown in Figure 8-17. The output of the 62 protection block will close the designated output contact
(VOx) when an open breaker and open close circuit condition exists. The S<g>-62 command is used to
provide a 500-millisecond time delay to inhibit the momentary alarm that will occur due the timing
difference between the two signals.
Figure 8-17. Close Circuit Monitor Logic
8-62 BE1-851 Application 9289900990 Rev R