BE1-25/79TR Functional Description
3-11
Close TD Timer
This timer determines the maximum time the close output will stay closed when a reclose attempt is made.
This timer is set according to the breaker operate time needed for a successful reclose. The close TD timer
has a range of 1 to 999 seconds.
Loss Of Potential Timer
There is one loss of potential timer (LOP). The range is 0.01 to 9.99 seconds. This timer is used to inhibit
a line test (LT1 or LT2) or restore power (RP1 or RP2) reclose if the bus or line potential goes dead and the
breaker remains closed (no 52b input) for the duration of the LOP TD. The making of the 52b input prior to
the expiration of the LOP timer inhibits the LOP blocking function. A setting of 0 inhibits this function from
preventing the reclose.
SELECTION FUNCTIONS
HSR Sync
This selection is used to supervise the high speed reclose (HSR) with the Sync-check function. When set
to YES or enabled, this selection will not allow a high speed reclose to occur unless the sync-check
conditions are met with SYNC output closed.
Start 52b
This selection allows the master timer to start timing along with all the reclose timers (LT1, LT2, RP1, RP2,
and PAR) whenever the breaker opens (52b closes). When set to YES or enabled, the only condition
required to start the master timer and reclose timers is the closing of the 52b contact sense input. With this
selection, the reclose initiate contact sense inputs (LT1, LT2, RP1, RP2, PAR, or HSR) are not required to
start a reclosing sequence.
COMMUNICATIONS
General
Communications interface is provided on the relay front and rear panels. Each communications interface
is compatible with standard RS-232 connectors and software. Communications protocol is compatible with
readily available modem software that emulate a dumb terminal.
RS 232-C Format
Configure external terminals or computers with the following settings or parameters:
Baud rate . . . . . . . . . . . . . . . . . . . . 300,600,1200,2400, 4800, 9600, or 19200
Data bits . . . . . . . . . . . . . . . . . . . . . Eight
Stop bits . . . . . . . . . . . . . . . . . . . . . Two
Parity . . . . . . . . . . . . . . . . . . . . . . . None
Terminal emulation . . . . . . . . . . . . DECVT-100 compatible
Software flow control (XON, XOFF) ON
Carriage return (CR) translation . . Carriage return only.
Line feed (LF) . . . . . . . . . . . . . . . . OFF
Line wrap . . . . . . . . . . . . . . . . . . . . OFF
Summary of Contents for BE1-25/79TR
Page 1: ...05647 6 10 07 14 19 241 5 0 4 15 0 4 64 Publication 9 2787 00 990 Revision B 07 95...
Page 27: ...BE1 25 79TR Controls and Indicators 2 7 Figure 2 7 Front Panel Vertical Mount Relay...
Page 29: ...BE1 25 79TR Functional Description 3 2 Figure 3 1 Functional Block Diagram...
Page 60: ...BE1 25 79TR Installation 4 8 Figure 4 9 RS 232 Interconnection Diagram For IBM Type Computers...
Page 63: ...BE1 25 79TR Testing 5 2 REAR VIEW FRONT VIEW Figure 5 1 BE1 25 79TR Test Simulator...
Page 64: ...BE1 25 79TR Testing 5 3 Figure 5 2 BE1 25 79TR Test Simulator Schematic Diagram Sheet 1 of 2...
Page 65: ...BE1 25 79TR Testing 5 4 Figure 5 3 BE1 25 79TR Test Simulator Schematic Diagram Sheet 2 of 2...
Page 66: ...BE1 25 79TR Testing 5 5 Figure 5 4 Test Setup Diagram...