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Imagine standing before your electrical panel and seeing three crisp digital readouts — each telling you exactly what your voltage supply is doing in real‑time. No guessing. No intermittent flickers. Just confidence in what your system is delivering.
The Single Phase Three Display Overvoltage And Undervoltage Protector 63A is engineered to be the silent guardian in every power distribution line. Rather than simply reacting when things go wrong, it actively monitors, evaluates, and protects your connected equipment against both high voltage stress and low voltage brownouts that typical circuit breakers cannot detect.
In just a fraction of a second, this intelligent protector gauges incoming voltage and decides whether conditions are safe. If the voltage drifts above or below your preset safe range, it instantly disconnects power — preventing damage to sensitive appliances, motors, and electronics. When voltage stabilizes again, the device automatically reconnects your load after a configurable delay, ensuring smooth recovery without manual intervention.
This protector isn’t just a piece of hardware — it’s assurance that your equipment will last longer, run cleaner, and perform with less interruption.
| Rated voltage | AC 220V | Operating voltage range | AC 80-400V | |||
| Rated power | 50/60Hz | Rated current | 40A/63A | |||
| Over-voltage setting range | 230-300V | Under-voltage setting range | 210-140V | |||
| >U & <U Trip delay | 0.1-30s | Reset/start delay | 1-500s | |||
| Voltage measurement accuracy | 2% | Protection level | IP 20 | |||
Seeing is believing. Three high‑contrast displays clearly show:
Present voltage level
Protective status of the device
Immediate feedback when abnormal voltages occur
This lets maintenance personnel and operators visually confirm line conditions instantly.
Unlike basic threshold switches, this device is built with microprocessor intelligence that:
Actively detects harmful voltage dips and surges
Disconnects the circuit before damage happens
Automatically restores power only when conditions are safe
Adjustable action and recovery voltages let you customize the performance for different environments
This means your motors hum with confidence and your electronic controls stay protected — not stressed.
Whether you’re protecting lights, compressors, refrigerators, or specialized machinery:
Set your own overvoltage cut‑off
Define your undervoltage trip point
Adjust delay and reset timing to match system dynamics
This flexibility helps eliminate nuisance trips from transient anomalies while still responding quickly to dangerous conditions.
Designed for professional panels:
Compact DIN‑Rail or panel mount
Rugged, flame‑retardant housing
Clear terminal labeling for fast wiring
Built to withstand electrical noise and temperature variation
Installation is straightforward — no special tools, no drilling, just reliable protection built into your flow.
Standard circuit breakers protect against overcurrent but are blind to voltage anomalies such as brownouts or sustained surges that can degrade motors and electronics at the microscopic level. This protector fills that “voltage blind spot” by continuously watching the voltage waveform and acting before stress accumulates — a critical advantage for protecting expensive or mission‑critical equipment.
Whether in a workshop, restaurant kitchen, or industrial site, voltage swings happen due to utility grid instability, sudden load changes, or long cable runs. This protector ensures:
Lights don’t flicker erratically
Motors don’t stall and overheat
Electronics aren’t pushed beyond design limits
Systems recover smoothly after transients
Imagine knowing your power environment is guarded — that’s the peace of mind this device brings.
Q: Can this protector prevent damage during power surges?
A: Yes. It cuts power when voltage exceeds preset thresholds, protecting downstream loads from stress and potential failure.
Q: Does the device reset itself after a trip?
A: Yes — once voltage returns to a safe range and the configured delay expires, it reconnects automatically without manual reset.
Q: Are the voltage ranges adjustable?
A: Absolutely. Both overvoltage and undervoltage thresholds are user‑adjustable to meet differing application needs.
Q: Can I install it in any panel type?
A: It’s designed for DIN‑rail and panel mounting, making it compatible with most electrical cabinets and distribution boards.
Q: Is this protector suitable for sensitive electronics?
A: Definitely. Its rapid detection and disconnect behavior ensure that vulnerable electronics are disconnected before voltage stress can accumulate.
