Basler Electric BE1-79A 9310200114 - Manual (Page 11)

SECTION 1
• GENERAL INFORMATION
Description
The BE1-79A Reclosing Relay is an economical, microprocessor-based relay that automatically recloses
circuit breakers that have been tripped by protective relays or other devices in power transmission and
distribution systems. The BE1-79A relay, part number 9310200114, offers "plug-and-play" convenience; it
can be installed in an existing ABB FT-32 case with no wiring changes required for many applications.
The BE1-79A relay, part number 9310200114, can replace the ABB type RC relay in most applications
using 52a and 52b inputs. Refer to Section 3, Functional Description, to determine compatibility with your
specific application.
Features
BE1-79A Multiple Shot Reclosing Relays have the following standard features:
•
Rugged construction in a steel, draw-out case
•
A maximum of four automatic reclosures
•
A maximum of four automatic resets
•
Lockout function
•
Selectable instantaneous or delayed first reclosure
•
Selectable internal or external instantaneous jumper
•
Normally closed RS output contact
•
Selectable contact sensing voltage range
Controls and Indicators
The front panel has indicators to verify relay power and recloser status. A Reset switch is provided to
restore the relay to the reset mode by clearing a reclosing sequence or a lockout condition.
Communication
All relay settings are read or changed through the serial port located on the front panel. The BE1-79A
uses ASCII protocol.
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
9310200893 Rev C BE1-79A General Information 1-1