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Minilec Phase Failure Relays ALV D2

Minilec Phase Failure Relays ALV D2 Specification

Dielectiric Strength
2kV AC for 1 minute between terminal & enclosure

Power Consumption
2VA (approx.)

Coil Voltage
415V AC

Coil Power
2VA

Protect Feature
Phase Failure, Sequence, and Unbalance Protection

Contact Material
Silver Alloy

Working Temperature
-10C to +50C

Contact Form
1 Changeover (SPDT)

Contact Resistance
100 m (initial)

Mechanical Life
10 operations

Ambient Temperature
-10C to +55C

Product Type
Phase Failure Relay

Insulation Resistance
>100 M at 500 VDC

Theory
Electromagnetic Relay

Usage
Industrial protection of three-phase motors and equipment

Contact Load
5A at 250V AC/30V DC

Operate Time
Less than 200 ms

Terminal Type
Screw type

Rated Voltage
415V AC

Supply Terminal
L1-L2-L3

Size
DIN Rail Mount

Color
White and Blue

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

Weight
Approx. 100g

Humidity
Up to 95% RH (non-condensing)

Phase Sequence
Protects against incorrect phase sequence

Minimum Load
100mA at 5V DC

Output Type
Relay output

Standards Compliance
IS/IEC standards

Phase Unbalance Percentage
50% max

Status Indication
LED indication for relay status

Reset Type
Automatic reset

Number of Poles
1 Pole

Response Time
Less than 200 ms

Enclosure Material
Flame retardant polycarbonate

Mounting
DIN Rail Mountable

About Minilec Phase Failure Relays ALV D2

Minilec Phase Failure Relays

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 / 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	:	40 V ±6 V (fixed)

Under Voltage	For 380-440V AC For 220-240V AC For 110 V AC	80% to 95% (adjustable) of auxillary supply (±2% of set value)
Over Voltage	For 380-440V AC For 220-240V AC For 110 V AC	105% to 120% (adjustable) of auxillary supply (±2% of set value)

Trip Time Delay

	On Phase Failure	:	3.5 secs. ± 1.5 sec
	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.

ALV D2 ALV D2

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

Reliable Protection for Critical Equipment

The ALV D2 Phase Failure Relay is designed to monitor and protect three-phase motors and equipment from phase-related faults. It prevents motor damage by quickly responding to failures, incorrect phase sequences, and unbalances, making it a trusted solution for industrial setups. High reliability and compliance with IS/IEC standards ensure long-term performance and safety.

Efficient Performance and Easy Installation

This relay offers speedy response in less than 200 milliseconds and automatic reset operation, minimizing downtime and ensuring seamless protection. Its screw-type terminals and convenient DIN rail mounting simplify installation for distributors, suppliers, and traders in India. LED status indication allows for straightforward monitoring, contributing to efficient maintenance.

Durable Design with Superior Materials

Encased in flame-retardant polycarbonate, the relay withstands tough conditions, including up to 95% relative humidity. With mechanical life rated for up to 10 operations, it promises lasting durability. Strong insulation resistance and advanced contact materials guarantee safe, reliable operation in industrial environments.

FAQs of Minilec Phase Failure Relays ALV D2:

Q: How does the ALV D2 Phase Failure Relay help protect industrial equipment?

A: The ALV D2 Relay immediately detects phase failures, incorrect phase sequence, and excessive phase unbalance, protecting three-phase motors and equipment from downtime and potential damage.

Q: What is the process for installing the ALV D2 relay?

A: Install the relay on a DIN rail using screw-type terminals for L1, L2, and L3 supply connections. The compact dimensions fit standard distribution panels, making setup quick and convenient.

Q: When does the relay respond to phase issues, and how is status indicated?

A: The relay responds to phase failures or unbalances in less than 200 milliseconds. Its LED indicator displays the current relay status, allowing users to monitor for faults in real time.

Q: Where can the ALV D2 relay be used?

A: The ALV D2 relay is suitable for use in industrial locations to protect three-phase motors, compressors, and related equipment, especially where standards compliance and rapid fault detection are needed.

Q: What are the key benefits of automatic reset in this relay?

A: Automatic reset enables the ALV D2 to restore protection immediately after transient faults are resolved, reducing the need for manual intervention and minimizing equipment downtime.

Q: Is the ALV D2 relay durable in harsh environments?

A: Yes, it supports up to 95% humidity (non-condensing), operates between -10C to +50C, and features a flame-retardant polycarbonate enclosure, ensuring sustained performance in challenging industrial conditions.