3-Phase DIN Rail Voltage Monitor Relay Protector 63A/100A
3-Phase DIN Rail Voltage Monitor Relay Protector 63A/100A
3-Phase Din Rail Voltage & Current Monitor Relay Protector (63A / 100A)
Keep your three-phase electrical systems running safely and efficiently with this intelligent, multi-function voltage and current protection relay. Designed for DIN rail mounting, this adjustable protector automatically monitors line conditions in real time — disconnecting loads when voltage strays outside your set thresholds and automatically restoring power once conditions return to normal. Made in Mainland China.
Key Features
- Multi-Function Protection: Covers overvoltage, undervoltage, and phase-unbalance scenarios in a single integrated unit with automatic reset capability.
- High-Precision LCD Display: Clear, easy-to-read LCD shows live current and voltage readings at a glance — low power consumption keeps the display energy-efficient.
- Real-Time Auto Disconnect & Restore: When voltage exceeds or drops below your set range, the relay instantly disconnects the load. Once the line stabilises, it automatically reconnects — no manual intervention needed.
- User-Adjustable Thresholds: Set your own current and voltage trip points via the intelligent control chip to match the exact demands of your equipment and installation.
- Robust DIN Rail Installation: Moulded-case construction withstands heat and cold extremes, making it reliable in demanding industrial and commercial environments.
- Wide Current Range: Available in 1A–63A and 1A–100A versions to suit a broad range of load applications.
Specifications
| Type | Three-Phase Overvoltage / Undervoltage Protection Relay |
| Rated Voltage | AC 220V |
| Rated Current | 1A–63A | 1A–100A (selectable) |
| Overvoltage Trip Range | 230V – 300V (adjustable) |
| Undervoltage Trip Range | 120V – 210V (adjustable) |
| Delay Recovery Time | 1s – 600s (adjustable) |
| Display | LCD (current & voltage) |
| Mounting | DIN Rail (moulded case) |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × Three-Phase Overvoltage/Undervoltage Protector Relay
- 1 × Instruction Manual
Safety & Electrical Standards
For guidance on safe electrical installation practices, refer to the OSHA Electrical Safety Standards. Always ensure installation is carried out by a qualified electrician in accordance with local codes and regulations.
Note: Due to manual measurement tolerances, please allow ±1–3 cm variance. Colours may vary slightly between product images and physical units due to screen calibration differences.
Frequently Asked Questions
Q: What is the difference between the 63A and 100A versions of this three-phase voltage protector relay?
A: Both versions offer the same overvoltage, undervoltage, and phase-unbalance protection features. The 63A model is suited to lighter three-phase loads (rated up to 63 amps), while the 100A model handles heavier-duty industrial or commercial applications with loads up to 100 amps. Select the version that matches or exceeds your circuit's maximum current draw.
Q: Can I adjust the overvoltage and undervoltage trip points myself?
A: Yes. The intelligent control chip allows you to set custom overvoltage thresholds (between 230V and 300V) and undervoltage thresholds (between 120V and 210V) directly on the unit. You can also configure the delay recovery time from 1 to 600 seconds to suit your specific system requirements.
Q: Does the relay automatically restore power after a voltage fault clears?
A: Yes. Once the line voltage returns to within your configured safe range and the programmed delay recovery period has elapsed, the relay automatically closes and restores power to the load — no manual reset is required.
Q: How is this protector relay installed?
A: The unit uses standard DIN rail mounting for fast, tool-free installation inside a distribution board or electrical enclosure. Its moulded-case design is built to handle both high and low temperature environments, making it suitable for industrial, commercial, and utility panel installations.