High Impedance Differential

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  1M123 High Impedance BUS Protection Rack

  High impedance protection schemes are widely used for the protection of BUS bars, generators, motors & power transformers. BUS bar protection schemes utilizing electromechanical high impedance differential relays are often used due to their simplicity, reliability & comparatively low cost. While numeric high impedance differential relays are now available the application of electro mechanical schemes is likely to continue at least in the role of the Y protection scheme where…
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  2C73 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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  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. The 2V68 type relays have a setting range of 2-14V adjusted on a per phase basis from calibrated potentiometers at the front panel. The relay is continuously rated at…
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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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  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. All relay versions are supplied fitted with heavy duty contacts to achieve high voltage isolation across open contacts & high short term carry current. Contacts are constructed from solid silver, shaped & positioned to ensure very reliable, low resistance operation. Over travel of the…