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TSN ENGINEERING LTD

Empowering Power Generation & Control

Feeder Protection

The MRI4 is a protection relay which uses the latest Dual-Core-Processor Technology to provide precise and reliable protective functions and is very easy to operate. The MRI4 provides a number of three phase protection elements to safeguard against overcurrent, short-circuit and earth fault, all with inverse time (INV) and definite time (DEFT) tripping characteristics.

The MRI4 is also ideal for the protection of isolated, resonant, resistive and solidly earthed neutral systems. It is designed to be used in both radial networks and single fed open ring main systems. It can also serve as backup protection for differential protection systems on generators, transformers, bus bars and electrical lines. For overhead line protection the MRI4 is also available with an optional auto-reclosing function.

The intuitive operating concept with plausibility checks and extensive commissioning functions such as the built-in fault simulator allows a safe and time-optimized maintenance and commissioning. The parameter setting and evaluation software Smart view can be used consistently across the entire family of devices.

ANSI: 50, 51, 50N, 51N, 46, 49, 60L, 79, 86, 50BF, 74TC

Technical Specification

Protection Relay

700;650;8bcc4c67dc56b8f99c17760b32f4fad41cbfa379700;650;fe069eb4064df2c444190f4e223ac045df159d61700;650;88308b78a018ce4707b6e916ea2a6d5f6840ee7f700;650;1fd01b993cccbf48f677862d9b8d2b0195a7b525700;650;72b6362c79ac165d4d563d3bcbceb2074e470ace700;650;04dbee635c074735117559cd7119b2ba6f1a1c6f700;650;653dc7d565ec3f09726deb8ad80c311d63e83c41700;650;e869c5504aa6f1a9428ca0dec6c4372dc91e2a6e

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