1-2
BE1-79A General Information
9310200990 Rev G
PRIMARY APPLICATION
The BE1-79A automatically recloses circuit breakers that have been tripped by protective relays or other
devices in power transmission and distribution systems.
Over 90% of faults occurring on overhead lines may be cleared by momentarily de-energizing the line.
Once the circuit breaker has been opened to de-energize the line, the BE1-79A provides a reliable
automatic reclosure. The advantages are:
•
Improved service continuity—returns the line to service quickly, preserving line integrity and
minimizing outage effects on critical loads.
•
System
stability—prevents
disjointing of the system grid.
•
Higher line availability—decreases likelihood of permanent loss of line.
SPECIFICATIONS
BE1-79A relays have the following features and capabilities.
Reclose Timers 1, 2, 3, and 4
Range:
0 to 300 seconds
Increments:
0.1 second
Accuracy:
±20
milliseconds ±1%, typical
±50
milliseconds
±1%,
maximum
Reset Timers 1, 2, 3, 4, and Final
Range:
0 to 300 seconds
Increments:
0.1 seconds
Accuracy:
±20
milliseconds ±1%, typical
±50
milliseconds
±1%,
maximum
Lockout Timer
Range:
0 to 300 seconds
Increments:
0.1 seconds
Accuracy:
±20
milliseconds ±1%, typical
±50
milliseconds
±1%,
maximum
RS Set and Reset Timers
Range:
0 to 300 seconds
Increments:
0.1 seconds
Accuracy:
±20
milliseconds ±1%, typical
±50
milliseconds
±1%,
maximum
Communication Port
Parameters:
9600 baud, 8N1 half duplex
Protocol:
ASCII
Power Supply
Operating Range:
120 to 240 Vac
125
to
250
Vdc
Power Holdup Time
∗
:
40 cycles (670 ms)
∗
BE1-79A-101, BE1-79A-201 only. Minimum holdup time after loss of nominal operating voltage.
Contact Sensing Inputs
Operating Range
48 Vdc, Nominal:
38.4 to 275 Vdc
125 Vdc/120 Vac, Nominal:
100 to 275 Vdc or 96 to 264 Vac
250 Vdc/240 Vac, Nominal:
200 to 275 Vdc or 192 to 264 Vac
Energizing Level:
80% of nominal
Current Draw:
1.5 mA maximum per input
Summary of Contents for BE1-79A
Page 1: ...INSTRUCTION MANUAL FOR RECLOSING RELAY BE1 79A Publication 9310200990 Revision G 02 08...
Page 2: ......
Page 8: ...vi BE1 79A Introduction 9310200990 Rev G This page intentionally left blank...
Page 10: ...ii BE1 79A General Information 9310200990 Rev G This page intentionally left blank...
Page 16: ...ii BE1 79A Controls and Indicators 9310200990 Rev G This page intentionally left blank...
Page 20: ...2 4 BE1 79A Controls and Indicators 9310200990 Rev G This page intentionally left blank...
Page 22: ...ii BE1 79A Functional Description 9310200990 Rev G This page intentionally left blank...
Page 34: ...ii BE1 79A Communication Commands 9310200990 Rev G This page intentionally left blank...
Page 40: ...ii BE1 79A Installation and Configuration 9310200990 Rev G This page intentionally left blank...
Page 52: ...ii BE1 79A Testing 9310200990 Rev G This page intentionally left blank...
Page 58: ...6 6 BE1 79A Testing 9310200990 Rev G This page intentionally left blank...
Page 60: ...ii BE1 79A RS Contact Application 9310200990 Rev G This page intentionally left blank...
Page 66: ...ii BE1 79A Terminal Communication 9310200990 Rev G This page intentionally left blank...
