Protection Relays

With a proven track record of 50 years, Microelettrica continues to lead the way making new protection, control, and automation applications possible.

From Generators to Transformers and through Transmission lines to Motors and beyond, our solutions detect anomalies and mitigate faults, preventing costly downtime and equipment damage to ensure dependable, safe power worldwide.

All Protection Relay Series

MC1V

Voltage single-phase relay
ANSI  27, 59, 68, 81, 86

MC2-30V

Voltage relay with ROCOF
ANSI  27, 59, 59N, 68, 74TCS, 81, 81R, 81V, 86

MC2-30MW

Motor relay with Voltage and Power control
ANSI  27, 37, 46, 48, 49, 50/51, 51BF, 51LR, 55, 59, 64, 66, 68, 74TCS, 81, 86

MC3V

Voltage three-phase relay
ANSI  27, 27V1, 59, 59N, 59V2, 68, 81, 86

MC3V-CEI-021

CEI-021 relay
ANSI  27, 51BF, 59, 68, 79, 81, 86
CEI-021

MC3V-CEI (A70)

CEI-016(A70) relay with autoreclosure
ANSI  27, 51BF, 59, 59N, 68, 79, 81, 81V, 86
CEI-016(A70)

FMR

Complete Feeder relay
ANSI  27, 27V1, 46, 49, 50/51, 50N/51N, 51BF, 51V, 59, 59N, 59V2, 68, 74TCS, 79, 81, 86

FMR-M

Complete Feeder/Motor relay
ANSI  27, 27V1, 37, 46, 48, 49, 50/51, 50N/51N, 51BF, 51LR, 51V, 59, 59N, 59V2, 64, 66, 67, 67N, 68, 74TCS, 81, 86