Lovato Electric

PMV50N Voltage Monitoring Relays


Lovato PMV50N voltage monitoring relays for three phase systems with or without neutral.

The Lovato PMV50N Voltage Monitoring Relays are suitable for industrial circuit protection applications for three phase systems with or without neutral. The PMV50N is instantaneously tripped when phase loss, neutral loss, or incorrect phase sequence is detected and has a delayed trip when a deviation outside minimum and maximum AC voltage parameters is detected.


General Characteristics:

– Voltage monitoring relay, self powered, for minimum and maximum voltage, phase loss, neutral loss and incorrect phase sequence.
– 4 configurable rated voltage (Ue):
• phase-phase: 208-220-230-240VAC.
• phase-neutral: 120-127-132-138VAC.
• phase-phase: 380-400-415-440VAC.
• phase-neutral: 220-230-240-254VAC.
• phase-phase: 480-525-575-600VAC.
• phase-neutral: 277-303-332-347VAC.
– Excellent tripping accuracy.
– TRMS measurements (True Root Mean Square)..
– Phase loss detection if one of the voltages is <70% rated value.
– Phase or neutral loss tripping time: 60ms.
– 2 relay outputs, each with 1 changeover contact (SPDT).
– Modular DIN 43880 housing, 3-module.
– IEC protection degree: IP40 on front (only when placed in IP40 enclosure or control board), IP20 at terminals.
– Adjustments:
• “V max”: Maximum voltage tripping threshold 105-115% Ue.
• “V min”: Minimum voltage tripping threshold 80-95% Ue.
• “Delay”: Tripping time 0.1-20s.
• “Reset delay”: Resetting time 0.1-20s.


Order Code Rated Voltage to Control Ue (phase to phase) Weight (kg)
PMV50NA240 208-240VAC 0.200
PMV50NA440 380-440VAC 0.200
PMV50NA600 480-600VAC 0.200


(Please see attached PDF’s for further information)