High‑speed voltage‑operated protective relay for substation bus‑bar internal‑fault protection. ...

Electromechanical var‑flow monitoring relay for generator reverse reactive‑power protection. ...

Electromechanical feeder‑protection relay with instantaneous unit for distribution fault clearing. ...

Very‑inverse electromechanical relay with instantaneous element for power‑feeder over‑current protection. ...

High‑speed six‑circuit auxiliary switching relay for power‑plant turbine & substation control loops. ...

Electromechanical residual‑current protective relay for power‑system earth‑fault monitoring and tripping. ...