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Minilec Phase Failure Relays S1 VMR7

Minilec Phase Failure Relays S1 VMR7 Specification

Power Consumption
<4VA

Contact Form
1 CO (SPDT)

Coil Power
< 4 VA

Coil Voltage
415V AC

Contact Material
Silver Alloy

Ambient Temperature
-10C to +55C

Dielectiric Strength
2 kV AC for 1 min

Contact Resistance
< 50 m

Working Temperature
-10C to +55C

Protect Feature
Phase Failure, Phase Sequence, Under/Over Voltage Protection

Mechanical Life
>1,000,000 operations

Product Type
Phase Failure Relay

Insulation Resistance
>= 100 M at 500V DC

Theory
Electromagnetic Relay

Usage
Protection of Motors and Equipment from Phase Failures, Phase Reversal and Under/Over Voltage conditions

Contact Load
5A at 250V AC (Resistive)

Operate Time
200ms (Approx.)

Terminal Type
Screw Type

Rated Voltage
415V AC (3 Phase)

Supply Terminal
L1, L2, L3

Size
22.5mm (Width modular)

Color
Grey/Black

Dimension (L*W*H)
78mm x 22.5mm x 104mm

Weight
Approx. 120g

Response Time
<400 ms

Trip Indication
LED

Enclosure Material
Flame Retardant Plastic

Standards Compliance
IS/IEC 60947-5-1

Mounting Type
DIN Rail Mounting

Relay Status Indicator
LED Indication

Adjustment
Fixed/Pre-set (Non Adjustable)

Frequency
50/60 Hz

About Minilec Phase Failure Relays S1 VMR7

Minilec Phase Failure Relays S1 VMR7

Overview:-

	Phase Sequence,
	Auto Reset,
	1 CO Output Relay

Technical Specification:-

Supply Voltage

System	:	380 440 VAC, 20%, 3PH-3 Wire
Auxillary	:	Built-in from 3-Phase

Output Contacts		:	1 CO

Trip Setting(Volts)
	Phase Sequence	:	Yes
	Phase Unbalance	:

Trip Time Delay

	On Phase Failure/ Unbalance	:	Instant
	For Level Sensing	:	NA

Resetting Mode		:	Auto Reset

Weight		:	90 gms. (Approx.)

Dimensions (mm)

Overall (L x W x D)	:	90 x 18 x 60 (Approx.)
Mounting (L x W)	:	35 mm rail Mounting

Note:

	Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)
	* Available on request.

Application:-

Suitable for 3 Ph. equipments
	Agricultural Pump Starters.
	3 Ph. Split AC machines.
	Hoist Motor Control
	Valve Actuator Motor
	Machine Tools
	Injection Molding M/c

S1 VMR7 S1 VMR7

Comprehensive Motor Protection

Specifically designed to detect and act against phase failure, phase reversal, and under/over voltage situations, the S1 VMR7 relay provides reliable protection for engines and electrical equipment. Its swift respond time reduces risk of equipment damage, ensuring system integrity and operational continuity in dynamic environments.

Quick Installation and Operation

The S1 VMR7s DIN rail mounting allows for convenient installation in standard panels. LED indicators clearly show relay and trip status, making it user-friendly and simplifying maintenance. The screw type terminal and modular design enable seamless integration into existing control systems.

Durable, Standards-Compliant Design

Housed in flame retardant plastic for superior safety, the relay is built for longevity, offering over one million mechanical operations. Compliant with IS/IEC 60947-5-1, it meets international benchmarks for reliability, making it suitable for distribution, supply, and trading networks in India.

FAQs of Minilec Phase Failure Relays S1 VMR7:

Q: How does the Minilec S1 VMR7 Phase Failure Relay protect my motor and equipment?

A: The S1 VMR7 continuously monitors all three phases for failures, incorrect phase sequence, and abnormal voltage conditions. If a fault is detected, it disconnects the load quickly (within 400 ms) to prevent damage from under/over voltage, phase loss, or reverse phase, ensuring your equipment remains protected.

Q: What is the process for installing the S1 VMR7 relay?

A: The relay is designed for DIN rail mounting, which simplifies the installation process. Connect your power supply leads (L1, L2, L3) to the screw terminals as per the wiring instructions. Once installed, the LED indicators immediately inform you of the relay and trip status, making it easy to verify operation.

Q: When should I use a phase failure relay like the S1 VMR7?

A: This relay is best used whenever there is a risk of phase failure, phase reversal, or voltage irregularities in three-phase systems such as those in industrial motors, pumps, or HVAC equipment. It helps prevent costly downtime and mechanical damage.

Q: Where is the S1 VMR7 best suited for deployment?

A: It is ideal for use in electrical panels in commercial and industrial environments across India, especially where there is a high demand for reliable motor protection, including manufacturing plants, warehouses, and large building infrastructure.

Q: What benefits do the LED relay and trip indicators offer?

A: The LED relay and trip indication provide instant visual feedback regarding relay status and trip events. This makes troubleshooting faster and helps maintenance teams quickly pinpoint any fault conditions without complex diagnostic tools.

Q: Is the S1 VMR7 adjustable for different voltage thresholds?

A: No, the S1 VMR7 comes with fixed, pre-set thresholds and is non-adjustable. This simplifies operation, ensuring consistent protection according to its rated voltage specifications without the need for manual settings.

Q: How does the relay ensure longevity and safety during operation?

A: Constructed from flame retardant plastic, meeting IS/IEC 60947-5-1 standards, and rated for over a million operations, the S1 VMR7 delivers durable performance and safe operation in a wide temperature range, ensuring long-term reliability in demanding settings.

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