Protection Relays

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  2V68-S BUS Bar CT Supervision & Shorting

  The 2V68 is a three phase monitoring device designed to provide continuous supervision of the CT circuits in high impedance differential protection schemes. The relay will detect open circuit conditions in the CT summation wiring and open circuited main current transformers. (more…)
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  2V73 High Impedance Differential Relay

  The 2V73 relay provides high speed differential protection for various items of power system plant including generators, busbars, motors & the individual windings of power transformers. The 2V73 is also suitable for restricted earth fault applications. The relay measuring element is basically an attracted armature unit of simple & rugged construction powered from a bridge rectifier. Each phase of the relay can be set from 25 to 325V AC in…
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  2V75 Metrosil / Resistor Module

  The 2V75 Module provides a compact, simple & cost effective means of fitting a pre-wired three phase Metrosil & stabilizing resistor combination into protection panels employing high impedance differential schemes. Mounting is achieved by first fitting a special panel to the front of the cubicle. This panel is suitable for 19 inch rack or flush mounting. The separate three phase Metrosil module is then installed from the rear of the…
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  3A20 Pilot Wire Intertrip Send & Receive Relays

  The operating element of the 3A20 Series is based on the well proven 6R heavy duty attracted armature control relay. The DC version of this relay is inherently immune to AC voltages & the addition of an AC filter circuit & copper shield over the core of the receive relay greatly enhances this attribute while maintaining high sensitivity to DC voltages. A mechanical flag indicator is provided on both the…
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  4D200 Tap Position Indicator (TPI) Display Module

  The 4D200 is specifically designed for operation with the RMS type 2V200 TPI to frequency transducer. The 2V200 provides a noise immune interface between the tap changer & the 4D200 via a 0 to 5KHZ frequency signal. Alternatively the 4D200 may be configured to accept a BCD coded input direct from the tap changer or via a voltage to BCD transducer. Where an RMS 2V164 Voltage Regulating Relay is being…
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  6RA20 CT Shorting Relay

  The 6RA20 CT Shorting relays are a special derivative of the standard 6R MATRIX auxiliary relay. This model range has been designed specifically for CT shorting. (more…)
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  ABM Status Input Active Burden Module

  Features Improve security of sensitive, high speed digital status inputs Provides capacitor discharge protection for solid state status inputs to ENA TS 48-4 Transient noise withstand to IEC60255 standards Compact and easy to fit and retrofit Instantaneous burden turn-on with ~50ms fixed dwell time Wide voltage operating range Thermal cut out protection Operation check LED Status input pick-up LED M4 screw terminals or optional flying leads ABMZ version with minimum…
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  uMatrix Platform Downloads Page

  uMATRIX-S User Guide umatrix-s-info-b uMATRIXwin PC Application Software uMATRIXwin_Setup_5203.zip umatrix-setting-files umatrix-s-usb-vcp-drivers Using Citect & Modbus Protocol with uMatrix citectmodbus UMX .zip Files The .zip file contains: .umx software file .ump sample parameters setting file .pdf functional description .pdf Modbus allocation tables for network communications port compatibility 2h034a-5602.zip 2h034b-5602.zip 2sy212a-0550.zip 2sy212b-0550.zip 2v067a-0524.zip 2v067h-0504.zip 2v164a-0545.zip 2v164b-0545.zip 2v164c-0545.zip 2v164i-0545.zip 2v165c-0510.zip