ABB REF615R feeder protection and control

ABB REF615R feeder protection and control

Equipment Overview

Core function: REF615R is a dedicated intelligent electronic device (IED) for feeder lines, designed specifically for the protection, control, measurement, and monitoring of utility substations and industrial power systems. It is an ABB Relion ®  Part of the 615 series products adopts a compact and withdrawable design.

Unique features

Provide four major replacement conveniences for ANSI and IEC DPU2000R users: the same appearance and size, no need to cut panels or reposition racks; I/O and CT/VT connections similar to wiring greatly reduce drawing modification time; Has considerable protection and control functions, and includes more functions; Close to SCADA compatibility in terms of DNP 3.0 points and Modbus registers.

Other features: six setting groups, pull-out design, optional underground and overhead cable fault detection (CFD), optional high-speed (<1 ms) output, on-site selection of 1A or 5A CT input, advanced user programmable function block, 16 programmable buttons, etc.

Standard configuration

Main applications: feeder protection and control, providing a standard configuration whose relay functions and characteristics are based on the analog inputs ordered for that configuration.

Configuration A: Directional phase and ground overcurrent, voltage and frequency protection, synchronous inspection, control, and power system metering (for one circuit breaker).

Compatible configuration: It can meet and exceed DPU2000R ANSI and IEC configurations, such as standard type, synchronous check type, SEF type, etc.

Protection function

Main protection functions: Provides protection against non directional phase and ground overcurrent, phase step distance, thermal overload, phase imbalance, and phase discontinuity, with sensitive ground fault (SEF), high impedance fault detection (HIZ), directional phase, ground, and neutral overcurrent, as well as phase, ground (residual), positive and negative sequence undervoltage and overvoltage protection.

Other protection functions: Provide three pole multiple automatic reclosing function for overhead distribution feeders of public utilities; Enhanced Arc Flash Detection (AFD), with three light detection channels, is used to detect arc faults in cable compartments of circuit breakers, busbars, and metal enclosed switchgear.

Application scenarios

Provide DPU2000R users with an economical and convenient solution for upgrading and replacing existing ANSI or IEC DPU2000R relays, without the need to change drawings, cut or replace wiring harnesses, cut metal, or add adapter plates.

Suitable for new users looking for the 19 inch rack installation form of ABB Relion 615 series.

Can be applied to various protection, control, and metering scenarios, supporting comprehensive utility and industrial distribution feeder solutions.

Supported ABB solutions

Together with the COM600 grid automation controller, it forms a true IEC 61850 solution for reliable distribution in utility and industrial power systems.

Provide a connection package that includes software and IED specific information, facilitating configuration through PCM600 protection and control of the IED manager, and integrating with COM600 station automation equipment or MicroSCADA Pro network control and management system.

Supports connection with systems such as MicroSCADA Pro and System 800xA.

Control, measurement, and recording functions

Control function: Provide the status and control of a circuit breaker through a set of buttons on the local human-machine interface (LHMI) on the front panel, support remote circuit breaker control, and configure interlocking schemes through the signal matrix tool in PCM600.

Measurement function: Continuously measure phase current and voltage, sequence components and residual current, calculate demand and minimum/maximum demand current, thermal overload of protected objects, phase imbalance values, etc. It can also measure voltage, power and energy, etc.

Recording function: including digital fault recorder (DFR), event sequence recorder (SER), which can store fault records, demand and minimum/maximum demand current data, and has load curve recording function.

Monitoring and diagnostic functions

Circuit breaker status monitoring: including checking the wear and tear of the circuit breaker, the spring charging time of the circuit breaker operating mechanism, the gas pressure in the circuit breaker chamber, etc., monitoring the action time and operation frequency of the circuit breaker.

Trip circuit monitoring: Continuously monitor the availability and operability of the trip circuit, and detect the loss of circuit breaker control voltage.

Self diagnosis: The built-in self diagnostic system continuously monitors the hardware status and software operation of the relay. When a fault or malfunction is detected, it will alert the operator. Permanent relay faults will prevent the protection function of the relay.

Other monitoring functions: fuse fault protection, current circuit monitoring, etc.

Input/Output and Communication

input/output

Analog inputs: including current (CT) and voltage (VT) analog inputs, phase current inputs can be programmed by users to 5A or 1A CT secondary ratings, etc.