Protection Relays

for Grid Protection

Grid protection ensures swift detection and response to abnormal operating conditions like faults, voltage or frequency fluctuations in the interconnection of the main power grid with secondary distribution systems or renewable energy plants.

Microelettrica solutions for Grid, Voltage and Frequency protection are suitable to meet different needs, with a wide range of protection functions and dedicated products for standard compliances.

N-DIN-016

LV relay for CEI-016
F
CEI-016

N-DIN-FEN

Basic LV Grid relay
F

MC0A

Earth-Fault relay
AF  50N/51N, 51BF, 86

MC20

Basic Feeder Relay
F

MC20-CEI

CEI relay with Directional Earth-Fault
F
AF  67N
CEI-016

MC20-016

CEI-016 relay
F
CEI-016

MC1V

Voltage single-phase relay
V

MC2-30V

Voltage relay with ROCOF
V
AF  59N, 74TCS, 81R, 81V

MC3V

Voltage three-phase relay
VV

MC3V-CEI-021

CEI-021 relay
V
AF  51BF, 79
CEI-021

MC3V-CEI (A70)

CEI-016(A70) relay with autoreclosure
V
AF  51BF, 59N, 79, 81V
CEI-016(A70)

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Protection Relays

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Grid Protection

PROTECTIVE FUNCTION PACKAGES
F   Standard Feeder (ANSI 50/51, 51BF, 50N/51N, 68, 86)
FF   Advanced Feeder (ANSI 46, 49, 50/51, 51BF, 50N/51N, 68, 79, 86)
V   Standard Voltage (ANSI 27, 59, 81, 68, 86)
VV   Advanced Voltage (ANSI 27, 27V1, 59, 59N, 59V2, 68, 81, 86)
M   Motor (ANSI 37, 46, 48, 49, 51LR, 64, 66, 68, 86)
Dir   Directional (ANSI 67, 67N)
AF   Additional Functions
Note: 68, 86 not present in N-DIN series
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PROTECTIVE FUNCTION PACKAGES
F   Standard Feeder (ANSI 50/51, 51BF, 50N/51N, 68, 86)
FF   Advanced Feeder (ANSI 46, 49, 50/51, 51BF, 50N/51N, 68, 79, 86)
V   Standard Voltage (ANSI 27, 59, 81, 68, 86)
VV   Advanced Voltage (ANSI 27, 27V1, 59, 59N, 59V2, 68, 81, 86)
M   Motor (ANSI 37, 46, 48, 49, 51LR, 64, 66, 68, 86)
Dir   Directional (ANSI 67, 67N)
AF   Additional Functions
Note: 68, 86 not present in N-DIN series