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Minilec Phase Failure Relays HLV D2

Minilec Phase Failure Relays HLV D2 Specification

Working Temperature
0C to 50C

Contact Form
1C/O (SPDT)

Coil Voltage
415V AC (direct sensing from supply voltage)

Contact Material
Silver Alloy

Power Consumption
2 VA max

Protect Feature
Phase Failure, Sequence & Unbalance Protection

Ambient Temperature
-10C to 55C

Contact Resistance
< 50 m

Dielectiric Strength
2000V AC for 1 min

Coil Power
< 2 VA

Mechanical Life
Over 10 million operations

Product Type
Phase Failure Relay

Insulation Resistance
>= 100M at 500V DC

Theory
Electromagnetic Relay

Usage
Protection and Monitoring of 3 Phase Supply

Contact Load
5A @ 230V AC / 5A @ 28V DC Resistive

Operate Time
< 3 sec

Terminal Type
Screw Terminals

Rated Voltage
415V AC

Supply Terminal
L1, L2, L3, N

Size
Compact

Color
Grey

Dimension (L*W*H)
88 mm x 54 mm x 18 mm

Weight
Approx. 120 g

About Minilec Phase Failure Relays HLV D2

Minilec Phase Failure Relays HLV D2

Overview:-

	Phase Failure, Unbalance,
	Phase Sequence, Under voltage,
	Over Voltage, Manual 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. for OV & 2 - 5 secs for UV

Resetting Mode

Manual / Remote


Weight	:	430 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

Robust Protection and Monitoring

Minilec HLV D2 offers advanced protection against phase failures, incorrect sequences, and voltage imbalances. Its built-in short circuit protection and LED status indicators make monitoring seamless and reliable, ensuring operational continuity.

Simple Installation and Operation

Designed for DIN rail mounting with screw terminals, the relay is straightforward to install in control panels or distribution boards. Automatic reset and compact dimensions (88 mm x 54 mm x 18 mm) lend themselves to both new installations and quick replacements.

Durable Design for Demanding Environments

Featuring a flame-retardant ABS enclosure and capable of withstanding high humidity (up to 95% non-condensing) and temperatures from -10C to 55C, the HLV D2 is engineered for enduring performance in harsh industrial settings.

FAQs of Minilec Phase Failure Relays HLV D2:

Q: How does the Minilec Phase Failure Relay HLV D2 detect and respond to phase issues?

A: The HLV D2 continuously monitors all three phases (L1, L2, L3) and the neutral. It detects phase failure, incorrect phase sequence, and voltage unbalance. When it identifies any abnormality, the relay trips within 3 seconds, activating the status LED for immediate fault identification and protection.

Q: What is the process for installing the HLV D2 relay, and where is it typically used?

A: Installation involves mounting the device on a DIN rail and connecting the three-phase supply to the L1, L2, L3, and N screw terminals. It is widely used in control panels and distribution boards to protect motors and critical three-phase equipment in industrial and commercial facilities.

Q: When does the phase failure relay automatically reset, and how is the trip setting adjusted?

A: The relay features an automatic reset function: once the detected fault is cleared (for example, correct phase sequence or voltage restored), it resets itself. Trip settings like unbalance sensitivity and trip delay can be fine-tuned via on-device controls for targeted protection.

Q: What types of faults are indicated by the LEDs on the Minilec HLV D2, and how does this benefit users?

A: LED indicators display both system status and the nature of any detected faults, such as phase loss, incorrect sequence, or voltage imbalance. This immediate visual feedback allows maintenance personnel to quickly identify and rectify issues, minimizing downtime.

Q: How does the HLV D2 ensure user safety under short-circuit conditions?

A: The relay incorporates built-in short-circuit protection, safeguarding itself and the connected loads. Its robust enclosure further prevents electrical hazards, contributing to the safe operation of industrial installations.

Q: What makes the HLV D2 suitable for use in harsh environments?

A: The device is built with flame-retardant ABS material, supports operation in ambient temperatures of -10C to 55C, and functions reliably in up to 95% non-condensing humidity. Its high insulation resistance and strong dielectric strength further enhance safety in demanding scenarios.

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