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Minilec Phase Failure Relays D2 VMR2

Minilec Phase Failure Relays D2 VMR2 Specification

Dielectiric Strength
2000V AC for 1 minute

Coil Power
Approx 3VA

Mechanical Life
>1 million operations

Contact Material
Silver Alloy

Power Consumption
3VA

Coil Voltage
415V AC

Working Temperature
-10C to +55C

Ambient Temperature
-10C to +55C

Protect Feature
Phase failure, phase reversal, phase unbalance

Contact Form
SPDT

Contact Resistance
<50m

Product Type
Phase Failure Relay

Insulation Resistance
>100M at 500V DC

Theory
Electromechanical/Static

Usage
Protection against phase failure and unbalance

Contact Load
5A at 230V AC

Operate Time
200ms

Terminal Type
Screw type

Rated Voltage
415V AC (3 Phase)

Supply Terminal
L1-L2-L3

Size
Compact

Color
Grey/White

Dimension (L*W*H)
90mm x 22.5mm x 73mm

Weight
120g

Mounting Type
DIN Rail

Phase Reversal Protection
Yes

Applications
Control panels, industrial machinery, pumps, motors

Enclosure Material
Fire retardant ABS

Phase Unbalance Setting
Available, typically 30%

Frequency
50Hz/60Hz compatible

Reset Type
Automatic

LED Indication
Supply ON and Relay ON

Relay Output
1 Changeover contact

About Minilec Phase Failure Relays D2 VMR2

Minilec Phase Failure Relays

OVERVIEW :-

	Suitable for 3 Ph-4W system,
	Microcontroller design,
	Absolute values of UV/OV settings,
	Phase Failure, Unbalance,
	Phase Sequence, Under voltage,
	Over Voltage, Auto/Manual reset,
	Adjustable settings for Unbalance,
	UV/OV and trip delays,
	2 CO output relay

TECHNICAL SPECIFICATION :-

Supply Voltage

System	:	100-120 / 220-240 / 380-440V AC -25%+20%, 48-63 Hz
Auxillary	:	Built In (from 3 Phase)

Output Contacts		:	2 CO

Trip Setting(Volts)
	Phase Sequence	:	Yes
	Phase Unbalance	:	4 % - 20 % [Variable]

Under Voltage	For 380-440V AC For 220-240V AC For 100-120V AC	: : :	165-245V AC [Variable] 95-135V AC [Variable] 45-65V AC [Variable]
Over Voltage	For 380-440V AC For 220-240V AC For 100-120V AC	: : :	230-310V AC [Variable] 130-170V AC [Variable] 60-80V AC [Variable]

Trip Time Delay

	On Phase Sequence	:	Instant
	On SP/UV/OV	:	1 To 10 Sec [Variable)

Resetting Mode

Auto/ External Manual Reset (External NC Push Buttons)


Weight	:	300 gms.

Dimensions (mm)

Overall (L x W x D)	:	76 X 56.5 X 117.5
Mounting (L x W)	:	67 x 46 / 35 mm rail Mounting

Note:

Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)

APPLICATION:-

Suitable for monitoring 3 Ph. System supply from MAINS & used by motor load -
	AC & R Chiller compressor motors.
	AHU Fan /Pump Motors
	Machinery using multiple small motors.
	MAIN powers supply distribution panel board.
	DG Set application
	UPS
	Submersible Pumps
	Hoist & Crane

Advanced Protection Features

Designed for industrial applications, the D2 VMR2 relay offers comprehensive phase protection: failure, reversal, and unbalance. The configurable phase unbalance threshold (nominally 30%) ensures sensitive and accurate fault detection, ideal for pumps and motors.

Durable and User-Friendly Design

Constructed with fire-retardant ABS material, the D2 VMR2 relay boasts a robust enclosure and compact form factor for easy integration onto DIN rails in control panels. The screw terminals ensure secure connections and straightforward installation.

Reliable Performance Indicators

Equipped with dedicated LED indicators for both supply and relay status, users can quickly verify operational conditions. The devices high mechanical life (>1 million operations) and strong insulation ensure long-term reliability in demanding environments.

FAQs of Minilec Phase Failure Relays D2 VMR2:

Q: How does the Minilec D2 VMR2 relay protect three-phase equipment?

A: The D2 VMR2 relay monitors phase conditions to detect phase failure, phase reversal, and phase unbalance. When any issue is detected, it automatically activates its relay output to disconnect or alarm, thereby protecting motors and other equipment from electrical faults.

Q: What is the recommended environment and mounting method for this relay?

A: This relay is designed for ambient temperatures from -10C to +55C and should be mounted on a DIN rail in control panels or other industrial setups. Its compact size and screw-type terminals facilitate easy installation and secure wiring.

Q: When is phase unbalance protection beneficial?

A: Phase unbalance protection is critical when operating sensitive machinery such as pumps or industrial motors. It prevents overheating, vibration, and mechanical stress caused by uneven supply voltages, enhancing equipment lifespan and efficiency.

Q: Where can the D2 VMR2 relay be used effectively?

A: It is ideal for use in control panels, industrial machinery, motor setups, and pump houses where continuous three-phase power reliability is essential for safe and efficient operation.

Q: What LED indications are provided by the D2 VMR2 relay?

A: The relay features two LEDs: one indicates that supply power is ON; the other shows the relay operational status. These LEDs enable operators to quickly assess system health without additional equipment.

Q: How does the automatic reset feature work in this relay?

A: After detecting and acting on a phase fault, the relay automatically resets itself when the phase condition normalizes, ensuring minimal downtime and uninterrupted equipment protection without manual intervention.

Q: What are the benefits of installing this phase failure relay in an industrial electrical system?

A: Installing the D2 VMR2 relay reduces the risk of motor and equipment damage from phase-related faults, improves safety, minimizes production losses due to electrical issues, and provides rapid fault response and recovery.

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