REF545KB133AAAA REF 541 / 543 / 545 馈线终端

REF543KM127AAAA

The REF541, REF543, and REF545 series feeder terminals are designed to protect, control, measure, and monitor medium-voltage power grids. They are suitable for different main wiring modes, such as single bus, double bus and double switch wiring. The protection function also supports different types of power grids, such as neutral ungrounded systems, resonant grounded systems and small resistance grounded systems. The feeder terminal can also be applied to the protection and control of three-phase asynchronous motors and reactive compensation shunt capacitor banks. In addition to the protection, measurement, control and condition monitoring functions, the feeder terminal also provides a complete PLC logic programmable function, which enables the automation functions and sequential logic control functions required for the substation integrated automation system to be integrated into one unit. The feeder terminal can also use IEC 60870-5-103 protocol, DNP 3.0 protocol, Modbus protocol, SPA protocol, or LON network to communicate with the upper layer equipment. Moreover, with the point-to-point communication function supported by LON network, information can be exchanged between feeder terminals through communication, reducing the hard wiring between feeder terminals.

● Feeder terminals are used for protection, control, measurement and monitoring of medium voltage power networks
● Can be used for power quality monitoring, protection, capacitor bank protection and control and motor protection
● Current and voltage measurements can be made using current and voltage sensors or traditional CT and PT
● The man-machine interface of the device adopts a large LCD graphic display screen, and the LCD screen can be separated from the device, which is easy to install on the switch cabinet
● With protection, control, measurement, communication, power quality monitoring and equipment status monitoring and other functions
● Protection features include phase to phase overcurrent and ground protection with or without direction, zero sequence overvoltage protection, overvoltage and undervoltage protection, thermal overload protection, circuit breaker failure protection and automatic reclosing
● Control functions include local and remote control and simultaneous detection of control objects such as circuit breakers and isolation switches, status display of control objects and interlock display between screen cabinets and substation hosts
● Measurement functions include phase current, line voltage and phase voltage, zero sequence current and zero sequence voltage, frequency, power factor, active and reactive power and electrical energy measurement, etc
● Equipment status monitoring includes circuit breaker status display, trip loop monitoring and internal self-test of feeder terminals
● With the same time inspection, frequency protection, capacitor bank protection and control, current and voltage harmonic component measurement and other functions
● RTD/ Analog measurement module can be used for temperature, current/voltage measurement and the signal output of the mA quantity
● Has three communication interfaces: one for local communication with the PC, the other two for remote communication through the substation monitoring system
● Member of ABB Substation Automation system