Description
The REF620 is a dedicated feeder IED perfectly aligned for theprotection, control, measurement and supervision of utility substations and industrial power systems. REF620 is a member of ABB’s Relion® family and a part of its620 protection and control product series. The 620 series IEDsare characterized by flexibility and performance for demandingutility distribution and industrial applications. Engineered fromthe ground up, the 620 series has been designed to unleash thefull potential of the IEC 61850 standard for communication andinteroperability of substation automation devices. Unique REF620 ANSI features − Six setting groups − Drawout design − Underground, overhead cable fault detection (CFD) − High-speed (< 1 ms) outputs − High impedance (HIZ) fault detection − Arc flash detection (AFD) − Phase step distance protection − Power quality − Ring-lug terminals for all inputs and outputs − Large, easy to read LCD screen − Programmable push-buttons − Environmentally friendly design with RoHS Compliance
The REF620 provides main protection for overhead lines,cable feeders, and busbar systems of distribution substations.It can be applied for protection and control of grounded andungrounded distribution systems. It offers support for singlebreaker, one-and-half breaker and double breaker feeder configurations. Flexible order coding allows for choosing current-onlyor current-and-voltage configurations to best fit your distributionfeeder application needs.
The REF620 is the most powerful, advanced and simplestfeeder protection relay in its class, perfectly offering time andinstantaneous overcurrent, negative sequence overcurrent,phase step distance, phase discontinuity, breaker failure, thermal overload, and voltage metering and protection. The relayalso features high impedance fault (HIZ) and sensitive earthfault (SEF) protection for grounded and ungrounded distribution systems. Also, the relay incorporates a flexible three-phasemulti-shot auto-reclose function for automatic feeder restorationin temporary faults on overhead lines.
Enhanced with safety options, the relay offers a three-channelarc-fault detection system for supervision of the switchgear. TheREF620 also integrates basic control functionality, which facilitates the control of up to 2 circuit breakers via the relay’s frontpanel human machine interface (HMI) or remote control system.To protect the relay from unauthorized access and to maintainthe integrity of information, the relay has been provided with afour-level, role-based user authentication system, with individualpasswords for the viewer, operator, engineer, and administratorlevels. The access control system applies to the front panelHMI, embedded web browser based HMI, and thePCM600, Protection and Control IED Manager.
Main brands include: ABB, Bailey, GE, FOXBORO, Invensys TRICONEX, Bentley BENTLY, A-B Rockwell, EMERSON EMERSON, B&R, MOTOROLA, FUANC, REXROTH, KUKA, HONEYWELL, NI, DEIF, Yokogawa, WOODWARD WOODWARD, Ryan, SCHNEIDER SCHNEIDER, Yaskawa, MOOG, EPRO, PROSOFT and other major brands
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