ABB Network Partner AB
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Function:
1 Application
The control terminal REC 561 is used at bay level in a substation to con-
trol and supervise circuit breakers, disconnectors, and earthing switches in
any kind of switchgear/busbar arrangement. These features are available
in the REC 561 control terminal:
Basic features:
• Apparatus control for 1 bay (pole discordance protection included)
• Interlocking for 1 bay
• Time-tagged events
• Configurable logic
• Remote-serial communication - LON
• One binary input module
• One command output module
Optional features:
• Additional apparatus control (pole discordance protection included)
• Additional interlocking
• Measurements
• Pulse counters for metering
• Synchronism and energizing check
• Fuse failure supervision
• Multibreaker autoreclosing
• Breaker-failure protection
• Loss-of-power system voltage
• Disturbance recorder
• Remote serial communication - SPA
• Additional input/output facilities
2 General
Standardized, pre-tested software functions such as apparatus control,
interlocking, synchro-check, automatic reclosing are examples of useful
functions in a bay. These functions can be implemented in the same hard-
ware or control terminal with retained high availability of the complete
system.
The control terminal includes plug-in units, such as processor, memory,
input and output modules, all mounted in a 19-inch rack.
Binary and analogue process signals are connected directly to REC 561,
which fulfils the same EMC standards as applicable for high-voltage pro-
tections. The terminal is also provided with command output modules
with double-pole outputs and supervision functions to ensure a high
degree of security against unwanted operations.
Two serial communication ports are available within the REC 561, one
LON port (based on the LonWorks Network) and one port for an asyn-
chronous link, type SPA. They are independent of each other and availa-
ble on the rear side of the terminal. This enables the REC 561 to be used
2
Introduction - REC 561
1MRK 580 146-XEN
Version 1.0-00
October 1996
Basic
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