Basler Electric BE1-700 - Manual (Page 376)

VT Monitor (BE1-700V)
Fuse loss block logic can prevent mis-operation on loss of sensing voltage. See Figure 14-27. This can
be applied on the 27/59 functions.
Figure 14-27. Reporting and Alarms Screen, VT Monitor Tab
If the 27/59, Block Phase is enabled with a check mark in the field and a 60FL condition is detected, all
functions that use the phase voltage are blocked. If the 27/59, Block 3V0 is enabled with a check mark in
the field and a 60FL condition is detected, all functions that use the auxiliary over/undervoltage (27X/59X)
functions with Mode 2 selected are blocked. If the 27/59, Block V2 is enabled with a check mark in the
field and a 60FL condition is detected, all functions that use the negative-sequence voltage are blocked.
Breaker Monitoring
Each time the breaker trips, the breaker duty monitor updates two sets of registers for each pole of the
breaker. See Figure 14-28. This function selects which of the two sets of duty registers are reported and
monitored, sets the existing values, and programs the function logic.
Enter the Exponent value for the Breaker Duty. Click in the field for 100% Duty Maximum and set the
value. Logic settings for the Block Accumulation Logic can be made by clicking on the logic button and,
with your custom logic selected, selecting the block accumulation logic.
Because the relay is completely programmable, it is necessary to program which logic variable monitors
breaker status (how the relay knows when the breaker is closed). Set the Breaker Status Logic by clicking
on the logic button and, with your custom logic selected, selecting the control logic.
Three breaker alarm points are programmable for checking breaker monitoring functions. Each alarm
point can be programmed to monitor any of the three breaker monitoring functions or all three alarm
points can be programmed to monitor one function and alarm at various threshold levels. Use the pull-
down menu for Point 1 and select the preferred breaker monitoring mode (Disabled, Operations, or
Clearing Time). With the Mode set, the Threshold field is viable and has a zero threshold. Use the
keyboard to enter the threshold value or the appropriate (UP or DOWN) arrow buttons. Repeat the
procedure for Breaker Alarm Points 2 and 3.
14-22 BE1-700 BESTCOMS Software 9376700990 Rev M