3 Phase Voltage Monitor Relay, 3-wire 127V-265V/4-wire 220V-460V

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$68.39

The three-phase voltage monitoring relay has SPDT (2 C/O) contacts, accurate pressure measurement, and is suitable for quickly cutting off or connecting the circuit when the power supply voltage exceeds or falls below the set range for 3-wire AC 127V-265V/ 4-wire AC 220V-460V to ensure the safe and reliable operation of the power system. The 3-phase relay is equipped with LED lights to indicate the working status and is lightweight and easy to install.

Monitoring Voltage *

SKU: ATO-MR-GRV810

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Delivery date: 6-12 days

Overview

The 3-phase voltage monitor relay has an LED indicator to indicate the working status, with a normal/ emergency power switch, which can effectively detect voltage imbalance and protect the equipment from accidents caused by the reverse operation. There are two open and two closed contacts, and the flame-retardant shell is reinforced. This three-phase relay has 8 rated voltages that are adjustable, with a wide range of applications, and can be used for field equipment, agricultural equipment, refrigerated vehicle lights, and mobile equipment connection control.

Feature

Controls its own supply voltage (True RMS measurement).
Set 8-level rated operating voltage through the knob.
Set the reset delay time through the knob.
2C/O output.
Measuring frequency range: 45Hz-65Hz.
Voltage measurement accuracy <1%.
Relay status is indicated by LED.
2-MODULE, DIN rail mounting.
Ultra-small size, only 36mm width, 35mm rail installation.

Specification

Model	ATO-GRV8-10M265	ATO-GRV8-10M460
Function	Monitor L-N voltage (3-phase 4-wire system)	Monitor L-L voltage (3-phase 3-wire)
Monitoring Terminals	L1-L2-L3-N	L1-L2-L3
Supply Terminals	L1-L2-L3-N	L1-L2-L3
Voltage Range	127-132-138-220-230-240-254-265 (P-N)	220-230-240-380-400-415-440-460 (P-P)
Rated Surge Withstand Voltage	2.5kV
Rated Insulation Voltage	500
Rated Supply Frequency	45Hz-65Hz
Measuring Range	101V-318V	176V-552V
Threshold Adjustment Voltage	2%-20% of unselected
Adjustment of Asymmetry Threshold	5%-15%
Hysteresis	2%
Phase Failure Voltage	70% of the rated voltage
Supply Indication	Green LED
Time Delay	Adjustable 0.1 s - 10 s, 10%
Measurement Error	≤1%
Run-up Delay at Power-up	Adjustable 0.1 s - 10 s, 10%
Konb Setting Accuracy	10% of scale value
Reset Time	Adjustable 0.1 s - 10 s, 10%
Temperature Coefficient	0.05%°C, at=20°C (0.05%°F, at=68°F)
Output	2×SPDT
Current Rating	8A/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°℃ to +55℃ (-4°F to 131°F)
Storage Temperature	-35℃ to +75℃ (-22°F to 158°F)
Mounting/ DIN rail	Din rail EN/ IEC 60715
Protection Degree	lP40 for front panel/ IP20 terminals
Installation	35mm rail installation
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	90mm×36mm×64mm
Weight	100g
Standards	EN 60255-1, lEC60947-5-1

Wiring Diagram

3-phase voltage monitor relay phase wiring

Panel Diagram

3-phase voltage monitor relay phase panel

Function Diagram

Phase failure and phase sequence function diagram

3-phase voltage monitor relay phase failure and sequence

Asymmetry function diagram

3-phase voltage monitor relay phase asymmetry function

To: Overvoltage threshold tripping delay.
Tu: Undervoltage threshold tripping delay.
Ta: Asymmetry threshold tripping delay.
Tr: Power-up delay.

Overvoltage and undervoltage function diagram

3-phase voltage monitor relay phase overvoltage and undervoltage

Dimensions (mm)

3-phase voltage monitor relay dimension mm

Tips: Maintenance of 3-Phase Voltage Monitor Relay

Use a soft brush or air blow gun to remove dust from the outside and inside of the relay and maintain a dry and clean environment.

Tighten the screws and regularly replace aging parts such as worn contacts or coils to keep the relay in normal working condition. Regularly check the contact point pressure and arc marks of the relay to ensure that the contact point pressure is appropriate and there is no abnormal wear or corrosion.

Ensure that the power supply voltage is stable to prevent the relay from bearing a current load exceeding the rated capacity to prevent overload damage. The working environment temperature should be appropriate. If it exceeds the specified temperature range, heat dissipation measures need to be taken.

Existing reviews of 3 Phase Voltage Monitor Relay, 3-wire 127V-265V/4-wire 220V-460V

Useful 3 Phase Voltage Monitor Relay

I referred to the data on many pages before deciding to buy this three-phase voltage monitoring relay, because the original electrical wiring in the house was installed many years ago when I moved in, and it is not easy to change it over time. However, because I recently purchased a solar panel, I decided to install a monitor for safety reasons. This 3-phase voltage relay can monitor the AC voltage before connecting to the grid, ensure voltage stability during the switching process, and prevent equipment damage or safety accidents due to voltage fluctuations. The high quality of the relay saved me a lot of trouble later.

From: Lorraine | Date: 06/06/2024

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