GIC-MC21D5-415 Vn-3-Phase-3-Wire-Phase-Failure-Rotation-Assymmetry-SPCO-17-5mm-GIC-MC21D5-P-The-MC21D5-415 Vn-relay-from-GIC-can-be-used-as-either-an-under-voltage-or-over-voltage-fault-detector-In-addition-it-can-be-used-to-check-the-phase-sequence-of-a-three-phase-voltage-The-MC21D5-relay-protects-against-Phase-Loss-Phase-Reversal-&-Phase-Asymmetry-P-GIC-MC21D5-415 Vn-3-Phase-3-Wire-Phase-Failure-Rotation-Assymmetry-SPCO-17-5mm