Brand: Lovato Electric

Lovato PMV20A575 PMV20 Three-Phase Voltage Monitoring Relay

Name: Lovato PMV20A575 Monitoring Relay | Seven Star LLC
Brand: Lovato Electric
SKU: PMV20A575

Description

Protecting motors and panels from phase loss and wrong phase order

The PMV20A575 is a voltage monitoring relay for three-phase without neutral from Lovato Electric. It monitors the supply it is connected to and, according to the catalogue, performs this function: phase loss and incorrect phase sequence relay. The controlled line voltage runs from 208 VAC to 575 VAC, and no separate auxiliary supply is needed because the relay is self powered.

Its tripping delay is 0.06 s, reset is automatic, and the output is 1 changeover SPDT rated for a thermal current of 8 A.

Technical specifications

Parameter	Specification
Order code	PMV20A575
Product designation	Voltage monitoring relays
Product type designation	PMV20
Description	Phase loss and incorrect phase sequence relay
Type of system	Three-phase without neutral
Auxiliary supply voltage Us	Self powered
Operating voltage range	0.85-1.1 Ue
Rated frequency	50/60 ±5% Hz
Power consumption Max	28 VA
Power dissipation Max	2.5 W
Rated voltage to control (Ue) (min)	208 VAC
Rated voltage to control (Ue) (max)	575 VAC
Tripping delay	0.06 s
Resetting time	0.5 s
Resetting hysteresis	5 %
Instantaneous tripping for Ue	Voltage
Type of reset	Automatic
Tripping time for phase loss	60 ms
Number of relays	1
Relay state	Normally energised De-energises at tripping
Contact arrangement	1 changeover SPDT
Rated operational voltage AC (IEC)	250 VAC
Maximum switching voltage	400 VAC
IEC Conventional free air thermal current Ith ≤ 40°C	8 A
UL/CSA and IEC/EN 60947-5-1 designation	B300
Electrical life (with rated load)	100000 cycles
Mechanical life	3000000 cycles
Modular version	2U
Functions and protections provided	Phase loss, Incorrect phase sequence
Indication	1 green LED for power on and tripping
Rated insulation voltage Ui	600 V
Rated impulse withstand voltage Uimp	6 kV
Operating frequency withstand voltage	4 kV
Operating temperature (min)	-20 °C
Operating temperature (max)	+60 °C
Storage temperature (min)	-30 °C
Storage temperature (max)	+80 °C
Execution (n° of modules)	2
Material	Self-extinguishing polyamide
Mounting	35mm DIN rail (IEC/EN 60715)
IEC degree of protection	IP40 on front; IP20 at terminals
Dimensions (W x H x D)	35.8 x 104.7 x 64.9 mm
Weight	120 g

Selecting the relay

Different PMV codes cover different jobs; this one is described as phase loss and incorrect phase sequence relay. Compare the controlled voltage range (208 VAC to 575 VAC) with your system before ordering.

In practice the output contact is placed in the control circuit of a contactor or starter so that an abnormal supply drops the motor or switches a changeover scheme.

Applications and wiring

Typical places are pump and compressor panels, lifts, ventilation fans and any three-phase machine that can be damaged by running with a missing phase or reversed rotation. The relay is DIN-rail mounted and uses screw terminals.

Housing: 2U.

For panel design and commissioning, the practical figures to keep at hand are: dimensions (W x H x D) 35.8 x 104.7 x 64.9 mm; weight 120 g; mounting 35mm DIN rail (IEC/EN 60715); operating temperature (min) -20 °C; operating temperature (max) +60 °C; storage temperature (min) -30 °C; storage temperature (max) +80 °C; execution (n° of modules) 2; material Self-extinguishing polyamide; IEC degree of protection IP40 on front; IP20 at terminals. These come straight from the datasheet and are repeated here so that the key installation limits are visible without opening the PDF.

Documents and quotation

Attached is the English datasheet that Lovato Electric’s online catalogue generates for PMV20A575; the specification table above reproduces its values. Please confirm the supply voltage and system type, the contact arrangement and the DIN-rail space available before you order, and note that the manufacturer may revise datasheet values. Related items are listed under controllers & data acquisition. To request PMV20A575, send the quantity and delivery location with the quotation form; Seven Star LLC is an independent supplier based in Muscat.

Datasheets & Documents

Datasheet Lovato Electric PMV20A575 datasheet (EN, catalogue export) Download

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About brand

Lovato Electric is the Italian manufacturer of low-voltage electrical components for industrial automation and power distribution: contactors, motor protection circuit breakers, soft starters, variable speed drives, power factor controllers, transfer switch and generator controllers, and energy meters. It was founded in Bergamo in 1922 and has been run by the same family for four generations. Its headquarters is in Gorle, near Bergamo, and it celebrated its centenary in 2022.

Seven Star LLC is an independent supplier in Muscat. We list Lovato motor control, drives and power management products, and supply them to panel builders, contractors and maintenance teams in Oman and the GCC by order code.

Lovato Electric at a glance

Established	1922, Bergamo, Italy
Headquarters	Gorle (Bergamo), Italy
Ownership	Private, family-run for four generations
Product families	Contactors and relays, motor protection circuit breakers, motor starters, soft starters, variable speed drives, power factor controllers, ATS and gen-set controllers, multimeters and energy meters, micro PLCs

Lovato products we list

Family	Models	Typical use
Contactors	BF0910A230, BF1810A230, BF2510A230, BF2600A230, BF09T4A230 4-pole, BFS0923A024, 11BG0910A230 mini, 11BGR0901A048 reversing	Switching motors, heaters, lighting and capacitor banks
Motor protection and starters	SM1P0650, SM1P1000, SM1P3200, M1P enclosed DOL starter, ME024FD024, ME070RSD024, 31L48 time relay	Short-circuit and overload protection and direct starting of motors
Soft starters	ADXL0030600, ADXL0085600, ADXL0135600, ADXT0034, ADXT0084, ADXT0139	Reducing starting current and mechanical shock on pumps, fans and compressors
Variable speed drives	VLA1, VLB1, VLB3 0.75 kW, VLB3 2.2 kW, VLB3 5.5 kW, VLB3 22 kW, VT1	Speed control of pumps, fans and conveyors to save energy
Power management and control	DCRG8, DCRL8 PF controllers, ATL600 ATS controller, RGK600 gen-set controller, DMG200 multimeter, DMED300T2 energy meter, LRD20 micro PLC	Power factor correction, mains/generator changeover and energy monitoring

Lovato order codes describe the product. On a contactor such as BF0910A230, "BF09" is the frame and rated current (9 A in AC-3), "10" is the built-in auxiliary contact (one normally open), "A" means an AC coil and "230" is the coil voltage. The coil voltage must match the control circuit exactly, so it is the most common detail to check when replacing one. For motors, a soft starter limits the inrush current at start and stop, while a variable speed drive controls the speed continuously and saves energy on pumps and fans that do not need full flow all the time.

Where Lovato products are used

In Oman and the GCC, Lovato components are built into motor control centres, pump and HVAC panels, capacitor banks for power factor correction, generator and ATS panels, and machine control panels for industry, water and buildings.

Ordering Lovato products: what we need

Send the full Lovato order code. For contactors and starters, confirm the coil or control voltage. For drives and soft starters, send the motor power, current and supply voltage. For power factor controllers, send the number of steps and the CT ratio.

Facts checked against Lovato Electric company profile brochures, October 2026.

Browse Lovato Electric products by category: Motor Soft Starters, Automation Accessories, Controllers & Data Acquisition, PLC & I/O Cards, Circuit Breakers, Diesel Generator Spare Parts.