Minilec ALV D2 Voltage Protection Relay | 3 Phase Under & Over Voltage Protection Relay

The Minilec ALV D2 Voltage Protection Relay is a reliable 3 Phase Voltage Protection Relay designed to protect motors and electrical equipment against phase failure, phase sequence reversal, under voltage, over voltage, and phase unbalance. Built for continuous monitoring of three-phase power supplies, the ALV D2 is widely used in motor control centers (MCCs), pump panels, HVAC systems, DG sets, compressors, manufacturing plants, and industrial automation panels where uninterrupted and safe operation is essential.

The relay continuously monitors the incoming three-phase supply and disconnects the load whenever it detects abnormal voltage conditions that may damage motors or critical equipment. It features adjustable under-voltage (80%–95%) and over-voltage (105%–120%) settings, fixed phase unbalance detection, automatic reset, and 2 Changeover (2 CO) output contacts for easy integration with contactors, motor starters, PLCs, and control circuits. With support for 110V, 240V, 380V, 415V, and 440V AC systems, the ALV D2 offers excellent flexibility for a wide range of industrial installations. Its compact design allows both panel and 35mm DIN Rail mounting, making installation quick and convenient.

Manufactured by Minilec, a trusted name in industrial protection relays, the ALV D2 delivers dependable performance, long service life, and enhanced equipment safety. It is a preferred choice for panel builders, OEMs, electrical contractors, and maintenance engineers looking for comprehensive three-phase voltage protection.

Key Features

• Genuine Minilec ALV D2 Voltage Protection Relay
• Protects against phase failure, phase sequence reversal, under voltage and over voltage
• Fixed phase unbalance detection
• Adjustable under-voltage and over-voltage settings
• Automatic reset after fault clearance
• 2 Changeover (2 CO) output contacts
• Suitable for 110V, 240V, 380V, 415V & 440V AC systems
• Compact DIN Rail / panel mounting design
• Reliable protection for industrial motors and electrical equipment

Technical Specifications

• Model: ALV D2
• Brand: Minilec
• Product Type: 3 Phase Voltage Protection Relay
• Supply Voltage: 110 / 240 / 380 / 415 / 440 VAC ±20%, 50/60Hz
• Protection Functions: Phase Failure, Phase Sequence, Under Voltage, Over Voltage & Phase Unbalance
• Under Voltage Setting: Adjustable (80%–95%)
• Over Voltage Setting: Adjustable (105%–120%)
• Phase Unbalance Setting: 40V ±6V (Fixed)
• Output Contacts: 2 CO Relay Contacts
• Reset Mode: Automatic Reset
• Mounting: 35mm DIN Rail / Panel Mount
• Dimensions: 76 × 56.5 × 117.5 mm

Applications

• Motor Control Centers (MCC Panels)
• Pump control panels
• Compressors and HVAC systems
• DG set control panels
• Industrial control panels
• PLC automation systems
• Manufacturing plants
• Water treatment plants
• Electrical distribution panels
• Industrial machinery and OEM equipment

Why Buy From Voltkart?

• Genuine Minilec products
• GST invoice provided with every order
• Pan India delivery in 5–7 days
• Bulk pricing available on WhatsApp
• Expert technical support for product selection

Frequently Asked Questions

Q: What protection does the Minilec ALV D2 provide?

A: The ALV D2 protects three-phase equipment against phase failure, phase sequence reversal, phase unbalance, under voltage, and over voltage, helping prevent motor damage and production downtime.

Q: Can the under-voltage and over-voltage settings be adjusted?

A: Yes. The relay features adjustable under-voltage settings from 80% to 95% and over-voltage settings from 105% to 120% of the rated voltage, allowing the protection to be customized for different applications.

Q: Where is the Minilec ALV D2 commonly used?

A: The ALV D2 is widely used in MCC panels, pump panels, HVAC systems, compressors, DG sets, industrial automation panels, manufacturing plants, and electrical distribution systems requiring reliable three-phase voltage protection.

Related Products & Collections

Also explore our complete range of Protection Relays, Phase Failure Relays, Phase Sequence Relays, and Motor Protection Devices for enhanced electrical safety.

For complete automation panel solutions, browse our collections of PLCs, Timers, Temperature Controllers, AC Drives, and SELEC automation products. You may also be interested in our range of Power Supply solutions including DIN Mounted SMPS, Enclosed SMPS, 1 Phase SMPS, 3 Phase SMPS, and popular Mean Well MDR Series, NDR Series, EDR Series, and TDR Series power supplies for industrial applications.