ABB FEEDER TERMINAL REF 541 NUMERICAL RELAY

ABB REF 541 Relay feeder terminal is designed for protection, control, measurement and supervision in medium voltage networks. The REF 541 feeder terminal 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. The application area also covers medium-sized three phase asynchronous motors as well as protection and control of shunt capacitor banks used for reactive power compensation. In addition to protection, measurement, control, condition monitoring and general functions, the REF 541 feeder terminals are provided with a large amount of PLC functions, which allow for several automation and sequence logic functions, needed for substation automation, to be integrated into one unit.

The data communication properties include the following communication standards: SPA bus, LON bus, IEC 60870-5-103, IEC 61850 via SPA-ZC 400, Profibus DPV1 via SPA-ZC 302, DNP 3.0 and Modbus communication with higher level equipment. Further, the LON communication together with the PLC functions minimizes the need for hardwiring between the feeder terminals.

Feeder Terminals REF 541/543/545

Protection technology to support your goals Based on proven technology, REF 541/543/545 Feeder Terminals provide you with a solution that supports both utility networks and industrial applica-tions, including various network types and a variety of switchgear configura-tions. The REF feeder terminal supports your targets of supplying high-quality power and enabling efficient power system handling/management by pro-viding suitable functions and compre-hensive data exchange.

Supports your targets of supplying high-quality power Enables preventive maintenance and shortened outage times Adds value to asset management Accurate fault location, condition monitoring Gontrol, operational data and monitoring all available at a glance Flexible connectivity covers all your communications needs lEG 61850 support and simultaneous dual port communication

One product – lots of opportunities

REF 541/543/545 Feeder Terminals bring many benefits in a single package. For example, the impedance based fault locator for short circuits and earth faults signifi-cantly shortens outage times by reducing field work and enhancing the accuracy of network control. Condition monitoring paves the way for preventive maintenance adding value to asset management. Mea-surement and control functions enhance network operation and management by, for example, providing comprehensive power quality data. The comprehensive protection functionality is available in stan-dard configuration solutions. These can also be modified to meet specific require-ments thanks to the unrivalled flexibility of the terminal.

Cost-effective and comprehensive

REF 541/543/545 protection and control technology combines several functions in one unit. Control, operational data and monitoring are all available at a glance. Everything from process metrics to the condition of the power system equipment is fully covered. By integrating multiple functions into the same unit, you achieve cost effectiveness, high system reliability, safety and operability. Connectivity of REF 541/543/545 terminals to an up-level system is simplified considerably with the help of a connectivity package. Thus engineering times are reduced drastically.

Scope

Feeder protection relay

Product benefits

• Protection functions for many different types of power networks
• Programmable logic functions (PLC)
• Wide support for different communication protocols
• Optical communication for fast disturbance-free communication

Product features

• Voltage and current measurement via conventional measuring transformers or current sensors and voltage dividers
• Fault locator for short circuits in all kinds of network
• Support for IEC 61850 protocol through the SPA-ZC 400 adapter
• 15 binary inputs and 12 output relays

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