The MRlK1 digital multifunctional relay is a universal time over current and earth fault protection device with integrated auto reclosing relay intended for use in medium-voltage systems, either with an isolated/compensated neutral point or for net-works with a solidly earthed/resistance-earthed neutral point. In transmission line networks more than 70% of the occurring faults are transient (electric arcs extinguish, branches are falling on the overhead lines etc.) With the application of the automatic reclosing (AR) together with protection relays, many electric arcs are extinguished through temporary interruption of the energy supply. Without utilizing the automatic reclosing (AR) power supply interruptions would occur quite frequently. Statistics have shown that yet part of the faults remain after the first fast AR can be cleared with a longer 2nd AR interval. The digital multi-shot, three phase auto reclosing relay MRIK3 fulfills these requirements for use on medium voltage transmission or distribution systems, by 4-element AR with variable adjustable dead times. Important: For additional common data of all MR-relays please refer to manual "MR - Digital Multifunctional relays".
FEATURES & FUNCTIONALITY
The MRlK1 digital multifunctional relay is a universal time over current and earth fault protection device with integrated auto reclosing relay intended for use in medium-voltage systems, either with an isolated/compensated neutral point or for net-works with a solidly earthed/resistance-earthed neutral point. In transmission line networks more than 70% of the occurring faults are transient (electric arcs extinguish, branches are falling on the overhead lines etc.) With the application of the automatic reclosing (AR) together with protection relays, many electric arcs are extinguished through temporary interruption of the energy supply. Without utilizing the automatic reclosing (AR) power supply interruptions would occur quite frequently. Statistics have shown that yet part of the faults remain after the first fast AR can be cleared with a longer 2nd AR interval. The digital multi-shot, three phase auto reclosing relay MRIK3 fulfills these requirements for use on medium voltage transmission or distribution systems, by 4-element AR with variable adjustable dead times. Important: For additional common data of all MR-relays please refer to manual "MR - Digital Multifunctional relays".