Basler Electric BE1-79A 9310200114 - Manual (Page 23)

Microprocessor
All reclosing and communication functions are coordinated by the microprocessor. The BE1-79A uses an
eight-bit microprocessor with integral ROM (read-only memory) and RAM (random access memory). The
microprocessor is monitored by a watchdog circuit that resets the microprocessor if a problem is detected.
Outputs
The BE1-79A has 5 outputs. Table 3-3 provides a description of each output for each relay configuration.
Table 3-3. Outputs Description
Output Terminals Description
Close 12,13 This output closes when reclose times are reached , if 52b is still
present. This contact will remain close for 3 seconds or until 52b inputs
goes away. This contact will close only once for each timed reclose.
Alt. Close 1 15, 17 Operation is the same as close output.
Alt. Close 2 16, 17 Operation is the same as close output.
RS 1, 10 The SP-79RS command allows the RS contact operate and reset time to
be programmed. Refer to Section 4, Communication Commands,
Command Descriptions, for a detailed description of the SP-79RS
command.
Lockout/Alarm 6, 7 The SP-ALM command is used to program the lockout output to function
as a relay fail output or a combination relay fail/lockout output. As a relay
fail output, the output will close if relay operating power is lost. The
output will also close if the microprocessor detects an abnormal
condition or when the microprocessor is unsuccessful at storing settings
in EEPROM.
If the microprocessor closes the output due to a failure, all three front
panel LED indicators will be lit. The failure indication can be cleared by
cycling operating power to the relay.
Refer to Section 4, Communication Commands, Command Descriptions,
for a detailed description of the SP-ALM command.
Fault Clearing
The BE1-79A allows the first reclose to be delayed slightly so that faults may de-ionize before a reclosure
is initiated. Faults typically are allowed to de-ionize for approximately 217 ms (13 cycles) for distribution
voltages and 300 ms (18 cycles) for transmission voltages (including breaker-operating time). The
inherent delay of the BE1-79A relay is 22 to 48 ms when set at a time delay of zero. The reclose timers
may be adjusted in increments of 0.1 seconds, which is 6 cycles on a 60 Hz system.
It is possible to set an ABB recloser for an instantaneous reclose with no voltage applied at terminals 5
and 6. If this unusual application is employed, the user must confirm that voltage is applied to BE1-79A
terminals 5 and 6 when a reclose is desired. Terminals 5 and 6 must be energized for a reclose to be
initiated.
9310200893 Rev C BE1-79A Functional Description 3-3