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Minilec Phase Failure Relays VMR D2

Minilec Phase Failure Relays VMR D2 Specification

Working Temperature
-10C to +55C

Contact Resistance
< 50 m

Dielectiric Strength
2kV AC, 1 min

Protect Feature
Phase Failure, Phase Sequence, Phase Unbalance

Contact Form
1 C/O (SPDT)

Ambient Temperature
-10C to +55C

Power Consumption
< 4VA

Contact Material
Silver Alloy

Mechanical Life
10 Million Operations

Coil Voltage
Self Powered

Product Type
Phase Failure Relay

Insulation Resistance
>= 100 M at 500V DC

Theory
Electromagnetic Relay

Usage
Phase Protection for Motors and Electrical Equipment

Contact Load
5A at 250V AC (Resistive)

Operate Time
< 200ms

Terminal Type
Screw/Spring Clamp

Rated Voltage
415V AC, 3 Phase

Supply Terminal
L1-L2-L3

Size
Compact DIN Rail Mount

Color
Grey

Dimension (L*W*H)
77 x 22.5 x 110 mm

Weight
Approx. 120g

Enclosure Material
Flame Retardant Plastic

Mounting
DIN Rail Mountable

Storage Temperature
-20°C to +70°C

Model Name/Number
VMR D2

Response Time
< 200ms after phase fault

Hysteresis
Available (prevents relay chattering)

Status Indication
LED for Relay & fault conditions

Compliance
IS/IEC Standards

Reset Type
Automatic

Application
Pumps, Compressors, Industrial Motors, HVAC

Humidity
Up to 95% RH (Non-Condensing)

About Minilec Phase Failure Relays VMR D2

OVERVIEW :-

	Phase Failure, Unbalance,
	Phase Sequence,
	Under voltage, Over Voltage,
	Auto reset, Fixed Unbalance Setting,
	Adjustable UV/OV settings,
	2 CO output relay

TECHNICAL SPECIFICATION :-

Supply Voltage

System	:	110/220/230/240/380/415/440 V AC ±20% 50/60 Hz
Auxillary	:	110 V (Fixed) or (220 - 230 - 240) or (380 - 415 - 440) V AC ±20% selectable

Output Contacts		:	2 CO

Trip Setting(Volts)
	Phase Sequence	:	Yes
	Phase Unbalance	:	94 V ± 6 V (fixed)

Under Voltage	:	80% to 95% (adjustable) of auxillary supply (±2% of set value)
Over Voltage	:	105% to 120% (adjustable) of auxillary supply (±2% of set value)

Trip Time Delay

	On Phase Failure	:	3.5±1.5 secs. [Fixed]
	On UV/OV	:	Less than 2 secs.

Resetting Mode

Auto Reset


Weight	:	400 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)

* CE marked products available on request.

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

D1 HLS1 D1 HLS1

Efficient Motor Protection

The VMR D2 relay provides advanced protection for motors and electrical equipment against damaging phase anomalies. Its rapid fault detection and automatic reset help maintain continuous operations, safeguarding businesses against unplanned downtime and costly repairs in critical applications like pumps and compressors.

Simple Installation and Clear Status Indication

Designed for DIN rail mounting, the VMR D2 relay is compact and lightweight, making installation straightforward in control panels. The relays bright LED indicators inform users instantly about relay and fault states, streamlining troubleshooting and maintenance.

Reliable Performance Under Tough Conditions

This relay operates reliably within a wide range of temperatures and humidity conditions, thanks to its rugged construction and flame-retardant plastic enclosure. Its long mechanical life and high insulation resistance ensure dependable operation in harsh industrial settings.

FAQs of Minilec Phase Failure Relays VMR D2:

Q: How does the VMR D2 Phase Failure Relay benefit industrial motor protection?

A: The VMR D2 protects motors by accurately detecting phase failure, sequence errors, and phase unbalance. Its swift response time (<200ms) and automatic reset prevent equipment damage, minimize downtime, and enhance operational safety for pumps, compressors, and HVAC systems.

Q: What installation process should I follow for the VMR D2 relay?

A: Install the VMR D2 relay onto a DIN rail within your control panel. Connect supply terminals to L1, L2, and L3, then link the outputs using screw or spring clamp terminals. Ensure correct rated voltage (415V AC, 3-phase) is supplied, following the wiring diagram provided by the manufacturer.

Q: Where can the Minilec VMR D2 relay be used?

A: The VMR D2 relay is ideally suited for phase protection in pumps, compressors, industrial motors, and HVAC applications commonly found in manufacturing plants, commercial facilities, and utility installations across India.

Q: What status indications are provided by the relay?

A: The VMR D2 features LED indicators that illuminate to show relay operation and specific fault conditions, helping users quickly identify issues and take corrective action.

Q: When does the relay respond to phase faults?

A: The relay operates almost instantly, responding to phase faults in under 200 milliseconds to mitigate risks associated with phase failure, sequence errors, or phase unbalance.

Q: How does hysteresis improve the relays performance?

A: Hysteresis in the VMR D2 prevents relay chattering during voltage fluctuations, ensuring stable switching and prolonging both relay and equipment life.

Q: What standards and conditions does the VMR D2 comply with?

A: The relay meets IS/IEC standards for reliability and operates safely within -10C to +55C ambient temperature and up to 95% relative humidity (non-condensing), featuring a flame-retardant enclosure for enhanced electrical safety.

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