PMV40A575 – 3 PHASE LINE VOLTAGE CONTROL RELAY PMV40
Lovato PMV40A575 self-powered three-phase voltage monitoring relay for 380–575 V AC systems without neutral, providing voltage asymmetry, phase-loss and incorrect phase-sequence protection.
SKU:PMV40A575MPN:PMV40A575
Price
List Price£111.54ex VAT
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£111.54
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Why Choose the Lovato PMV40A575 Voltage Monitoring Relay?
The Lovato PMV40A575 is a compact and dependable three-phase voltage monitoring relay designed to protect industrial electrical systems against voltage asymmetry, phase loss and incorrect phase sequence. As part of the Lovato PMV40 monitoring relay series, it is suitable for supervising three-phase systems operating without a neutral conductor.
This self-powered relay continuously monitors a 380–575 V AC three-phase supply and de-energises its output contact when a monitored fault occurs. Adjustable asymmetry and timing controls allow the protection settings to be tailored to motors, machinery and control systems, helping reduce the risk of overheating, incorrect rotation and unexpected equipment failure.
With an adjustable 5–15% asymmetry threshold, rapid phase-loss detection and automatic reset, the PMV40A575 offers practical protection for higher-voltage industrial installations. Its compact two-module enclosure and 35 mm DIN rail mounting support straightforward installation inside electrical control panels and switchboards.
Key Advantages
Monitors three-phase 380–575 V AC systems without neutral.
Detects voltage asymmetry, phase loss and incorrect phase sequence.
Self-powered operation eliminates the need for a separate auxiliary supply.
Adjustable 5–15% asymmetry set-point.
Adjustable tripping and resetting delays help prevent nuisance operation.
Fast phase-loss response helps protect motors and connected equipment.
Compact two-module design for space-efficient panel installation.
Key Features
Lovato PMV40 voltage monitoring relay series.
380–575 V AC rated monitoring range.
Designed for three-phase systems without neutral.
Monitoring of voltage asymmetry, phase loss and phase sequence.
5–15% adjustable asymmetry threshold.
0.1–20 second adjustable tripping delay.
0.1–20 second adjustable resetting time.
Automatic reset following restoration of acceptable supply conditions.
One SPDT changeover relay output rated up to 8 A.
Potentiometer-based adjustment for straightforward configuration.
Green and red LED operating and trip indication.
35 mm DIN rail mounting with screw terminals.
Reliable Three-Phase Asymmetry Protection
Voltage asymmetry can cause three-phase motors to draw uneven currents, operate inefficiently and generate excessive heat. The Lovato PMV40A575 continuously compares the monitored phases and operates its output relay when the configured asymmetry level is exceeded.
The relay also detects complete phase loss and incorrect phase sequence. These functions help prevent motor damage, loss of torque and reverse rotation, making the PMV40A575 well suited to industrial machinery and motor control applications where dependable higher-voltage supply supervision is essential.
Typical Applications
Three-phase motor protection circuits.
Industrial control panels and switchboards.
Pumps, fans and compressors.
Conveyors and material handling systems.
Production and packaging machinery.
HVAC and refrigeration equipment.
Industrial power distribution systems.
Technical Specifications
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Reset Type
Automatic
Monitoring Function
Three-phase supply
Monitored Supply
Three-phase
Time Delay
Adjustable
Phase
Three Phase
Manufacturer
Lovato Electric
Series
PMV40
Model
PMV40A575
Product type
Three-phase voltage monitoring relay
Monitored system
Three-phase without neutral
Rated control voltage
380–575 V AC
Operating voltage range
0.7–1.2 × Ue
Rated frequency
50 / 60 Hz ±5%
Auxiliary supply
Self-powered
Maximum power consumption
30 VA
Maximum power dissipation
2.5 W
Programming method
Potentiometers
Monitored conditions
Voltage asymmetry, phase loss and incorrect phase sequence
Asymmetry set-point
5–15% of Ue
Tripping delay
0.1–20 seconds
Resetting time
0.1–20 seconds
Reset type
Automatic
Relay outputs
1
Relay operating state
Normally energised, de-energises on trip
Contact arrangement
1 changeover SPDT
Contact thermal current
8 A
Rated contact voltage
250 V AC
Maximum switching voltage
400 V AC
Status indication
Green power/status LED and red trip LED
Terminal type
Screw terminals
Maximum terminal tightening torque
0.8 N·m
Conductor size
0.2–4 mm²
Rated insulation voltage
600 V
Rated impulse withstand voltage
6 kV
Operating temperature
-20 to +60 °C
Storage temperature
-30 to +80 °C
Housing material
Self-extinguishing polyamide
Protection rating
IP40 front, IP20 terminals
Mounting type
35 mm DIN rail
Modular width
2 modules
Dimensions (W × H × D)
approximately 35.8 × 104.7 × 64.9 mm
Weight
approximately 130 g
Standards
IEC/EN 60255-5, IEC/EN 61000-6-2, IEC/EN 61000-6-3, UL 508 and CSA C22.2 No. 14
HS Code
85364900
Frequently Asked Questions
What is the Lovato PMV40A575 used for?
The PMV40A575 monitors a three-phase 380–575 V AC supply for voltage asymmetry, phase loss and incorrect phase sequence, helping protect motors and industrial equipment.
Does the PMV40A575 require an auxiliary power supply?
No. The relay is self-powered directly from the monitored three-phase circuit.
Can the voltage asymmetry threshold be adjusted?
Yes. The asymmetry set-point can be adjusted between 5% and 15% of the rated voltage.
What supply voltage range does the PMV40A575 monitor?
The relay is designed to monitor three-phase 380–575 V AC systems operating at 50 or 60 Hz without a neutral conductor.
How is the Lovato PMV40A575 installed?
The relay mounts onto a standard 35 mm DIN rail and occupies two modular units inside an electrical control panel.
Trusted Industrial Voltage Monitoring
Lovato monitoring relays are widely used by control panel builders, machine manufacturers and maintenance engineers to provide dependable voltage and phase protection in industrial electrical systems.
Reset Type
Automatic
Monitoring Function
Three-phase supply
Monitored Supply
Three-phase
Time Delay
Adjustable
Phase
Three Phase
Manufacturer
Lovato Electric
Series
PMV40
Model
PMV40A575
Product type
Three-phase voltage monitoring relay
Monitored system
Three-phase without neutral
Rated control voltage
380–575 V AC
Operating voltage range
0.7–1.2 × Ue
Rated frequency
50 / 60 Hz ±5%
Auxiliary supply
Self-powered
Maximum power consumption
30 VA
Maximum power dissipation
2.5 W
Programming method
Potentiometers
Monitored conditions
Voltage asymmetry, phase loss and incorrect phase sequence
Asymmetry set-point
5–15% of Ue
Tripping delay
0.1–20 seconds
Resetting time
0.1–20 seconds
Reset type
Automatic
Relay outputs
1
Relay operating state
Normally energised, de-energises on trip
Contact arrangement
1 changeover SPDT
Contact thermal current
8 A
Rated contact voltage
250 V AC
Maximum switching voltage
400 V AC
Status indication
Green power/status LED and red trip LED
Terminal type
Screw terminals
Maximum terminal tightening torque
0.8 N·m
Conductor size
0.2–4 mm²
Rated insulation voltage
600 V
Rated impulse withstand voltage
6 kV
Operating temperature
-20 to +60 °C
Storage temperature
-30 to +80 °C
Housing material
Self-extinguishing polyamide
Protection rating
IP40 front, IP20 terminals
Mounting type
35 mm DIN rail
Modular width
2 modules
Dimensions (W × H × D)
approximately 35.8 × 104.7 × 64.9 mm
Weight
approximately 130 g
Standards
IEC/EN 60255-5, IEC/EN 61000-6-2, IEC/EN 61000-6-3, UL 508 and CSA C22.2 No. 14
HS Code
85364900
No documents available for this product.
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