610 serie ABB Feeder Protection REF610 Product Guide

Description

REF610 is a feeder protection relay for protection, measuring and supervision of utility and industrial distribution power systems. REF610 is a member of ABB’s Relion® protection and control product family and part of its 610 product series. The 610 series includes protection relays for feeder protection, motor protection and general system voltage supervision. The plug-in design of the 610 series protection relays facilitates the commissioning of the switchgear and enables fast and safe insertion and withdrawal of relay plug-in units.

The protection relay is primarily targeted at the protection of incoming and outgoing feeders in distribution substations. REF610 is also used as back-up protection for motors, transformers and generators in utility and industry applications. Further, the 610 series protection relays are suitable for employment in marine and offshore environments.

The numerical feeder protection relays of the 610 series support a wide range of standard communication protocols, among them the IEC 61850, IEC 60870-5-103, DNP3, Modbus, Profibus, LON and SPA communication protocols.

Protection functions

The protection relay offers overcurrent and thermal overload protection, earth-fault and phase-discontinuity protection for cable feeders, and three-pole, multi-shot autoreclose functions for overhead-line feeders.

Enhanced with optional hardware, the protection relay also features two light detection channels enabling arc fault protection of the switchgear, busbar system and cable terminals.

The numerical feeder protection relays of the 610 series support a wide range of standard communication protocols, among them the IEC 61850, IEC 60870-5-103, Modbus, Profibus and DNP3 communication protocols.

The connection of the CTs to REF610 depends on the available number and types of CTs in the feeder cubicle. Generally an outgoing feeder is equipped with three phase current transformers for high- and low-set overcurrent protection. The residual current for the earth-fault protection can be derived from the three phase currents. It can also be measured with a ring-type cable current transformer, should the outgoing feeder be a cable line and a sensitive earth-fault protection be required. Should the feeder cubicle be equipped with two phase current transformers, REF610 can still be used for high- and low-set overcurrent protection including phase discontinuity and phase unbalance protection.

Measurement

The protection relay continuously measures the phase currents and the residual current. Further the protection relay calculates the thermal overload of the protected object, the phase unbalance value, the one-minute demand value, the demand value for a specified time frame and the maximum one-minute demand value over a specified time frame.

The values measured can be accessed locally via the user interface on the protection relay's front panel or remotely via the serial communication interface of the protection relay.

Disturbance recorder

The protection relay is provided with a built-in battery backed up digital disturbance recorder for four analog signal channels and eight digital signal channels. The analog channels can be set to record the curve form of the currents measured. The digital channels can be set to record external or internal relay signals, for example the start or trip signals of protection relay's stages, external blocking or control signals. Any digital relay signal such as a protection start or trip signal, or an external relay control signal can be set to trigger the recording. The recordings are stored in a nonvolatile memory from which the data can be uploaded for subsequent fault analysis.

Event recorder

To provide network control and monitoring systems with feeder level event logs, the protection relay incorporates a nonvolatile memory with capacity of storing 100 event codes including the time stamps.The nonvolatile memory retains its data also in case the protection relay temporarily loses its auxiliarysupply.The event log facilitates detailed pre- and post-fault analyses of feeder faults and distribution disturbances.

Circuit-breaker monitoring

The protection relay constantly monitors the tear and wear of the protected feeder's circuit breaker by using a set of built-in condition monitoring counters. The monitoring counters provide the circuit breaker with operational history data. This data can be used for scheduling preventive maintenance programs for the circuit breaker.

Trip-circuit supervision

The trip-circuit supervision continuously monitors the availability and operability of the trip circuit. It provides open circuit monitoring both when the circuit breaker is in its closed and in its open position. It also detects loss of circuit-breaker control voltage.

Self-supervision

The relay’s built-in self-supervision system continuously monitors the state of the relay hardware and the operation of the relay software. Any fault or malfunction detected is used for alerting the operator.

A permanent relay fault blocks the protection functions to prevent incorrect operation.

Inputs/Outputs

• Four current transformers 

• Two digital inputs 

• Three additional digital inputs on an optional I/0 module 

• Three normally open heavy duty output contacts 

• Two change-over signal output contacts 

• Three additional signaling contacts on an optional I/O module 

• One dedicated IRF contact 

• Input/output contacts freely configurable

Communication

The protection relays are connected to the fiber-optic communication bus directly or via bus connection modules and gateways. The bus connection module converts the protection relay's electrical signals to optical signals for the communication bus and, vice versa, the communication bus' optical signals to electrical signals for the protection relay.

Mounting methods

Using the appropriate mounting accessories, the standard relay case for the 610 series relays can be flush mounted, semi-flush mounted or wall mounted. The flush mounted and wall mounted relay cases can also be mounted in a tilted position (25°) by using special accessories.

Further, the relays can be mounted in any standard 19” instrument cabinet by means of 19” mounting panels available with cut-outs for one or two relays.Alternatively, the relays can be mounted in 19” instrument cabinets by means of 4U Combiflex equipment frames.

For routine testing purposes, the relay cases can be equipped with test switches, type RTXP 18, which can be mounted side by side with the relay cases.

Mounting methods 

 • Flush mounting

 • Semi-flush mounting

 • Semi-flush mounting in a 25° angle

 • Rack mounting • Wall mounting

 • Mounting to a 19" equipment frame

 • Mounting with an RTXP 18 test switch to a 19" rack

Relay case and plug-in unit

As a safety measure, the relay cases for the current measuring protection relays are provided with automatically acting contacts for short-circuiting the CT secondaries, when a relay plug-in unit is withdrawn from the relay case. In addition, the relay case is provided with a mechanical coding system to prevent the current measuring relay plug-in units from being inserted into a case for a voltage protection relay unit and vice versa, that is the relay cases are associated to a certain type of relay plug-in unit.

There is, however, a universal relay case available, which is not associated to a certain plug-in unit type. When a relay plug-in unit is plugged into such a relay case for the first time, the relay case automatically adapts to that particular protection relay type, that is the short-circuiting contacts are activated as well as the mechanical blocking system. Hereafter, the relay case is permanently associated to a certain protection relay type.

Selection and ordering data

When ordering protection relays and/or accessories, please specify the following information: order number, HMI language set number and quantity. The order number identifies the protection relay type and hardware and is labelled on the marking strip under the lower handle of the protection relay.

Use the ordering key information in F i g u r e 7 to generate the order number when ordering complete protection relays.

Approvals

REF610 has been granted a preliminary EDF approval:

Number EDF R&D H-M2A-2006-02557-FR.

Certificates

KEMA has issued a Type test Certificate of Complete type test for the 610 series products. Certificate No. 08-1071, 08-1072 and 08-1073.

DNV (Det Norske Veritas) has issued a Type Approval Certificate for the 610 series protection relays. Certificate No. E-9945. The 610 series protection relays comply with Det Norske Veritas' Rules for Classification of Ships, High Speed & Light Craft and Det Norske Veritas' Offshore Standards.

The ENA (Energy Networks Association) Protection Assessment Panel has issued a Notice of Conformity Certificate to REF610. Notice of Conformity No. 154 Issue: 1, General & Environmental Self Certification Statement No. SC001 Issue B, Functional Assessment Statement(s) No. FA001-05 Issue 1.

Korea Electrical Safety Corporation (KESCO) has issued a KAS V-Check Mark certificate for the 610 series products. Ref. Cert. No. KAS-KESCO-7018-02.

References

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