Macromatic voltage sensor relays are divided into voltage monitor relays and 3-phase monitor relays. Voltage monitor relays like the VMP, VAKP & VWKE Series are used for monitoring single-phase AC & ...Read More
Macromatic voltage sensor relays are divided into voltage monitor relays and 3-phase monitor relays. Voltage monitor relays like the VMP, VAKP & VWKE Series are used for monitoring single-phase AC & DC voltages to protect equipment against faults like over & under voltages. These voltage sensing relays do not require separate input voltage as they are powered by the monitored voltage. Three-phase monitor relays like PAP, PCP, PLP, PBDU, PC1 & PMP Series, on the other hand, continuously monitor for voltage / phase faults like phase loss, phase reversal, phase unbalance, undervoltage & overvoltage faults and rapid cycling to protect equipment in three-phase systems. These relays continue monitoring even with a lost phase and can detect single-phasing & unbalanced voltages irrespective of regenerative voltages. Read Less