Instructions; Application - ABB REF 54 Series Technical Reference Manual, General

1MRS750527-MUM
4.
4.1.
Feeder Terminal
Technical Reference Manual, General

Instructions

Application

The REF 54_feeder terminals are designed to be used for the protection, control,
measurement and supervision of medium voltage networks. They can be used with
different kinds of switchgear including single busbar, double busbar and duplex
systems. The protection functions also support different types of networks, such as
isolated neutral networks, resonant-earthed networks and partially earthed networks.
Control room connection
RER 111 LON
star-coupler
Fig. 4.1.-1 Distributed protection and control system based on REF 54_ feeder
terminals
The functionality available for REF 54_ depends on the selected functionality level
(refer to Section "Ordering Information" on page 103) and is also tied to the
hardware configuration. The desired functions can be activated from a wide range
of protection, control, measurement, power quality, condition monitoring, general
and communication functions within the scope of I/O connections, considering the
total CPU load. Compared to the traditional use of separate products, the
combination of desired functions provides cost-effective solutions and, together
with the relay configuration (IEC 61131-3 standard), allows the REF 54_ feeder
terminals to be easily adapted to different kinds of applications.
By means of the graphic HMI display, the control functions in the feeder terminal
indicate the position of disconnectors or circuit breakers locally. Further, the feeder
terminal allows position information from the circuit breakers and the disconnectors
to be transmitted to the remote control system. Controllable objects, such as CBs,
Optical LON bus
REF 54_
A050181
17