Description
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 | 45-65Hz | |
| Measuring Range | 101-318V | 176-552V |
| 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
Panel Diagram
Function Diagram
- Phase failure and phase sequence function diagram
- Asymmetry function diagram
To: Overvoltage threshold tripping delay.
Tu: Undervoltage threshold tripping delay.
Ta: Asymmetry threshold tripping delay.
Tr: Power-up delay.
- Overvoltage and undervoltage function diagram
Dimensions (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.
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