Basler Electric BE1-BPR - Manual (Page 73)

9272000990 Rev J BE1-BPR Functional Description 4-21
TD Command
Purpose:
Read or change timer delay settings.
Syntax: TD[x][=<delay>]]
Comments: x = the number of the timer being read or changed (1, 2, 3, 4, 5, or 6)
Delay = the time delay in cycles (c), milliseconds (m), or seconds (s)
A setting of zero disables a timer. An access area 1 or 2 password is required to change
settings.
TD Command Example:
Set time delay 2 at 100 milliseconds and time delay 5 at 30 seconds.
TD2=100
TD5=30S
Delay Timer. When a delay timer is started, a preprogrammed time delay (TD[x]) is loaded and the timer
starts timing out. If the reset input remains false for the duration of the time delay, output T[x] will become
true and remain true until the reset input becomes true.
This type of timer is useful in a breaker failure application where the breaker failure output is delayed to
allow the primary protection elements to operate the breaker and open the circuit.
Control Timer. When a control timer is started, a preprogrammed time delay (TD[x]) is loaded and the
timer starts timing out. Output T[x] is true for the duration of the time delay setting unless the reset input
becomes true. If the reset input remains false for the duration of the time delay, the time delay will time
out and the output will become false. The timer output will remain false until the timer is reset and a new
start input is received.
A control timer can provide a window of opportunity for an operation to occur or ensure input latch-in for a
specified time.
The BE1-BPR reclosing function can operate in parallel with the breaker failure logic. All inputs are
programmed using the BESTlogic LR command. When reclosing is enabled, virtual output 13 (O13) is
used for the 79 Close output of the recloser function block. If reclosing is disabled, O13 is used for the
breaker resistor protection function output that is described in the Breaker Status sub-section. Figure 4-7
illustrates how the recloser and breaker resistor protection function operate if both are enabled. O13 can
be connected to any physical output by using the LO command.
Reclosing
Separate time delays are programmable through the front panel or serial port by using the TD79
command. Time delay settings are available for each shot (TD791, TD792, and TD793), for the reset
timer (TD79R), reclose fail timer (TD79F) and a maximum reclose cycle timer (TD79M). Lockout and
reclose fail diagnostic flags are set/reset by the recloser diagnostics and by using the command PDIAG to
program the diagnostic outputs. Separate outputs for lockout and reclose fail can be programmed.
Reclosed state (RESET, WAIT, TIMING, or LOCKOUT) can be viewed at the front panel recloser status
screen in the relay status menu or by using the STATUS command.