Basler Electric BE1-700 - Manual (Page 221)

Close Circuit Monitor
While 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 for the close circuit monitor is shown in Figure 8-15. The output of the 62 protection block will
close the designated output contact (VOY) 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 to the timing differences between the two signals.
Figure 8-15. Close Circuit Monitor Logic
High-Speed Reclose
Each reclose time delay can be set as low as 100 milliseconds. Refer to Figure 8-16. If the application
requires a reclose time delay of less than 250 milliseconds, it is recommended that the close logic
expression be modified to prevent mis-coordination between the TRIP and CLOSE outputs.
A hold timer for each output relay is provided to hold the output closed for approximately 200
milliseconds. This prevents the relay contacts from opening before the breaker auxiliary contact interrupts
the trip coil current. For high-speed reclosing, the hold timer must be disabled so that the output contact
follows the VO1 output expression. To modify the logic, add the expression
Areclose 79C AND NOT trip
VO1" to the close logic. Examples 1 and 2 show a close expression and hold disable setting for high-
speed reclosing. Figure 8-16 illustrates this high-speed reclose interlock logic scheme.
9376700990 Rev M BE1-700 Application 8-39