Basler Electric BE1-BPR - Manual (Page 83)

9272000990 Rev J BE1-BPR Functional Description 4-31
n = Accumulated number of breaker operation
Ti = Time delay in msec, adjustable from 0 to ±50 msec, used to compute I[p][n]
I[p][n] = The filtered RMS value of the secondary phase p current in microprocessor
memory at the time the nth breaker operation is recognized by the
microprocessor. I[p][n] will correspond to the RMS current through the breaker for
the cycle ending at Ti msec from the time that the breaker 52a or b finger contact
was recognized. See NOTE under Breaker Resistor Diagnostics.
Tbo = Breaker operate time calculate as Tbo
T = Time in msec measured by the relay from when 52a or b contact closure is
recognized to when the fault detector(s) drop out.
Tc = Fixed time in msec, adjustable for 0 to ±50 msec, entered into the relay
representing the time from when the 52a or b contact changes state to when the
main breaker contacts begin to part. A negative Tc value is entered when the 52a
or b contacts change state after the main breaker contacts begin to part. A
positive Tc value is entered when the 52a or b contacts change state before
contact = Input contact and logic used to define breaker in open position
the
main breaker contacts part.
Breaker Duty is reported and set in terms of percent of DMAX using the DLOG command through a
communications port or using the contact duty log sub-screen on the front panel.
DLOG Breaker contact duty log data HMI Menu Branch: 3
Parameter Unit of Measure Range Increment Default
YY percent 0.00 to 101.00 0.01 0.00
DLOG HMI Screen Example:
DLOG Command
Purpose:
Read or change breaker contact duty log data.
Syntax: DLOG[P}[=]
Comments: P = breaker pole A, B, or C
YY = accumulated breaker pole duty as a percent of the DMAX setting
This function is available on enhanced BE1-BPR relays only. An access area 1 or 3
password is required to change settings.
DLOG Command Examples:
1. Read the contact duty log values.
DLOG
DLOGA= 92; DLOGB= 22; DLOGC= 27
2. Reset the Phase A duty log after maintenance was performed.
DLOGA=0
The breaker information used in computing the breaker contact duty is programmed through the
communication ports using the BKRCON, BKROPS, and CTP commands. Parameters for BKROPS and
CTP commands are as defined in the previous paragraphs. If DMAX is programmed as 0 (zero) the
breaker duty feature is disabled.
DLOG A B C
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