3-Phase Voltage Protector 63A/100A DIN Rail | LCD Relay
3-Phase Voltage Protector 63A/100A DIN Rail | LCD Relay
3-Phase 4-Wire Over & Under Voltage Protector – 63A / 100A DIN Rail Mount
Keep your three-phase electrical systems running safely with this intelligent 3-Phase 4-Wire Voltage Protector. Rated for 63A or 100A, it automatically disconnects the load when voltage drifts outside safe limits and reconnects once normal levels are restored — all without manual intervention. A built-in LCD voltmeter and ammeter give you real-time readings at a glance, making it an ideal solution for industrial panels, workshops, commercial buildings, and residential distribution boards.
Key Features
- Multi-Function Protection: Combines overvoltage, undervoltage, overcurrent, and phase-imbalance protection in a single intelligent relay unit.
- Auto Reset: Automatically disconnects on fault detection and reconnects when the line voltage returns to within the user-defined safe range — configurable delay of 1 s to 600 s.
- High-Precision LCD Display: Clear digital readout of live current and voltage on all three phases — low power consumption, always on.
- User-Configurable Thresholds: Set your own overvoltage limit (130 V–300 V) and undervoltage limit (80 V–210 V) to match your specific load requirements.
- DIN Rail Installation: Snaps onto standard DIN rail for fast, secure panel mounting. Heat- and cold-resistant enclosure handles demanding environments reliably.
- Two Current Ratings: Choose 63A (1 A–63 A range) or 100A (1 A–100 A range) to suit your application.
Specifications
| Phase Configuration | 3-Phase 4-Wire |
| Rated Voltage | AC 220 V |
| Rated Current | 63A model: 1 A–63 A | 100A model: 1 A–100 A |
| Overvoltage Protection Range | 130 V – 300 V (adjustable) |
| Undervoltage Protection Range | 80 V – 210 V (adjustable) |
| Delay Recovery | 1 s – 600 s (adjustable) |
| Display | LCD Digital (Voltmeter + Ammeter) |
| Mounting | Standard DIN Rail |
| Battery Required | No |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1 × Three-Phase Over/Under Voltage Protector
- 1 × Instruction Manual
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Frequently Asked Questions
Q: What is the difference between the 63A and 100A versions of this voltage protector?
A: Both models offer the same overvoltage, undervoltage, overcurrent, and phase-imbalance protection with an identical LCD display and DIN rail form factor. The key difference is the maximum current rating: the 63A model handles loads up to 63 amps, while the 100A model supports loads up to 100 amps. Choose based on the total rated current of the circuit you need to protect.
Q: Can I adjust the trip voltage thresholds myself?
A: Yes. The protector features user-configurable thresholds. You can set the overvoltage trip point anywhere between 130 V and 300 V, and the undervoltage trip point between 80 V and 210 V, directly on the unit. The auto-reconnect delay is also adjustable from 1 second up to 600 seconds.
Q: Does this protector work with standard DIN rail panels?
A: Yes. The unit is designed specifically for standard DIN rail mounting, making installation quick and straightforward in any residential, commercial, or industrial distribution panel that uses DIN rail.
Q: Will the protector reconnect automatically after a fault clears?
A: Yes. Once voltage on the line returns to within your configured safe range, the protector waits for the duration of the user-set delay (1 s–600 s) and then automatically closes the circuit to restore power supply — no manual reset required.