RCW Outdoor MV Triple‑single Auto Recloser

General‑assembly & pole‑unit outline drawings, mounting‑bracket drawing, primary‑secondary wiring schematics are available. Full IEC 62271‑111 compliant type‑test reports are supplied. Support includes protection‑setting consultation, communication‑protocol guidance and tender‑phase technical documentation.

Recloser is “self‑contained protection” device: fault detection and reclosing sequence run inside local controller; multiple reclose‑lockout cycles work standalone without master‑station support. Breaker+FTU solution heavily relies on remote master‑station logic. Recloser is preferred for mountain‑area feeders with unstable communication.

Major risk is burning‑out of downstream three‑phase motors under single‑phasing condition. Adopt “single‑phase‑trip three‑phase‑lockout” mode or add loss‑of‑phase protection at downstream. Avoid applying pure single‑phase lockout for feeders with large three‑phase motor loads.

①Single‑phase‑trip single‑phase‑lockout: for feeders dominated by single‑phase loads, only faulty phase isolated. ②Single‑phase‑trip three‑phase‑lockout: most‑common setting; trips faulty phase, locks‑out all three poles upon permanent fault to protect three‑phase motors. ③Three‑phase linked trip‑lockout: behaves like conventional recloser, for critical symmetrical three‑phase loads. Specify pre‑set controller mode at order stage.

A triple‑single recloser has separate vacuum interrupter and actuator for each pole, coordinated electronically without rigid mechanical ganging. Single‑phase fault can trip only the faulty phase. Conventional mechanically‑linked recloser trips all three phases for any fault. Triple‑single reduces outage scope for healthy phases, yet anti‑single‑phasing protection for motor‑type loads shall be considered.