Single Phase Voltage Monitoring Relay, 12V/24V DC, 110V/220V AC

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$67.68

High-quality and affordable single phase voltage monitoring relay providing 12V/24V/48V DC and 110V/220V/240V AC, equipped with an LED indicator and high contact capacity. Specially designed for fixed overvoltage protection, the 1-phase voltage monitoring relay operates stably with a 1NO+1NC contact configuration. The small 12V DC relay reliably functions in ambient temperatures ranging from -20°C to +55°C. The single phase monitoring relay is the best choice for voltage monitoring applications.

Rated Voltage *

SKU: ATO-MR-GRV8

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Overview

The single phase monitor relay is used to protect electrical equipment and motors from overvoltage and undervoltage, while also supporting the switching between normal and emergency power supplies. The product is made of flame-retardant materials and has passed burn tests, ensuring no particle drop and rapid extinction after flame. The relay offers multiple voltage options and can be directly installed in distribution boxes and is widely applicable in scenarios such as household appliance protection, industrial automation, renewable energy systems, emergency power supply systems, and medical equipment. It provides reliable voltage monitoring and protection, ensuring the safe operation and longevity of your equipment.

Features

Controls single phase relay's own supply voltage (True RMS measurement)
Users may select operation mode through the knob
Voltage measurement accuracy≤1%
Relay status is indicated by LED
Ultra-small size, only 18mm width, 35mm DIN rail mounting

Specification

Model	ATO-GRV8-01
Phase	1 Phase
Function	Monitoring voltage
Supply terminals	A1-A2
Rated supply voltage	DC12V, AC/DC24V-48V, AC/DC110V-240V, AC220V
Rated supply frequency	45Hz-65Hz,0
Rated insulation voltage	460V
Hysteresis	5%-20%
Supply indication	green LED
Time delay	Adjustable 0.1s-10s,10%
Measurement error	≤1%
Run up delay at power up	0.5s time delay
Knob setting accuracy	10% of scale value
Reset time	1000ms
Temperature coefficient	0.05%/°C, at=20°C (0.05%/°F, at=68°F)
Output	1×SPDT
Current rating	10A/AC1
Switching voltage	250VAC/24VDC
Min. breaking capacity DC	500mW
Output indication	red LED
Mechanical life	1×10⁷
Electrical life (AC1)	1×10⁵
Operating temperature	-20°C to +55°C (-4°F to 131°F)
Storage temperature	-35°C to +75°C (-22°F to 158°F)
Mounting/DIN rail	Din rail EN/IEC 60715
Protection degree	IP40 for front panel / IP20 terminals
Operating position	any
Overvoltage cathegory	III.
Pollution degree	2
Max. cable size (mm²）	solid wire max. 1×2.5 or 2×1.5/with sleeve max. 1×2.5(AWG 12)
Dimensions	90×18×64mm
Weight	59g
Standards	EN60255-1, IEC60947-5-1

Functions Diagram

Single Phase Voltage Monitoring Relay Functions Chart

Wiring Diagram

Dimensions (mm)

Single Phase Voltage Monitoring Relay Dimensions Chart

Tips: What does a single phase voltage monitoring relay do?

1. Monitors Voltage Levels: A single phase voltage monitoring relay continuously monitors the voltage in a single-phase electrical system, ensuring it stays within safe limits to protect connected equipment.

2. Protects Against Voltage Fluctuations: The relay provides protection by disconnecting the load or triggering an alarm if the voltage exceeds or drops below preset thresholds, preventing potential damage to electrical devices.

3. Wide Voltage Compatibility: These relays are compatible with various voltage ranges, such as 12V/24V DC and 110V/220V AC, making them versatile for different applications.

4. Critical for Sensitive Equipment: They are essential for protecting sensitive equipment like HVAC systems, lighting, and power supplies, which can be affected by voltage fluctuations, ensuring their longevity and proper function.

5. Adjustable Trip Protection: The relay allows setting the trip protection value according to the rated voltage of the equipment, based on the nameplate or manual instructions, to avoid over or under-protection.

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