| Rated supply voltage | AC 220V | AC 80-400V |
| Operation voltage range | AC80v-400v(three phass) | AC140~700v(three phass) |
| Rated current | 40A/63A/80A/100A | |
| Protection current setting range | 1~40A/63A/80A/100A | |
| Quantity: | |
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Our Three Phase Six Display Overvoltage And Undervoltage Protector is a high-performance low-voltage protective device designed to safeguard your electrical equipment and power supply systems. Suitable for industrial, commercial and residential three-phase power circuits, this protector effectively prevents damage caused by unstable voltage—including overvoltage, undervoltage and voltage fluctuations, which are common causes of equipment burnout, short circuits and safety hazards.
The unique six-display design allows you to clearly monitor the real-time voltage of each phase at a glance, making it easy to check the power supply status and troubleshoot quickly without additional tools. Built with high-quality flame-retardant materials and advanced sensing technology, it features fast response speed (≤50ms), stable performance and long service life, complying with international IEC standards for reliable use.
Easy to install and operate, it automatically cuts off the power when voltage exceeds or falls below the safe range, and restores power automatically once voltage returns to normal—saving you time and reducing manual intervention. As a necessary protective device for three-phase electrical systems, it is widely used in factories, workshops, office buildings, shopping malls and other places. Choose our three phase six display overvoltage undervoltage protector for comprehensive, visible and reliable voltage protection.
| Rated supply voltage | AC 220V | AC 80-400V | ||
| Operation voltage range | AC80V~400V(three phass) | AC140~700V(three phass) | ||
| Electric curent(>A)setting range | 1~40A/63A/80A/100A | |||
| Frequency | 50/60Hz | |||
| Overvoltage(>U) setting range | 230~300V | 390~500V | ||
| Undervoltage(<U) setting range | 210~140V | 370~260V | ||
| Rated current | 40A/63A/80A/100A | |||
| >U and <U trip delay | 0.1~30s | |||
| Reset/start delay | 1~500s | |||
| Rated insulation voltage | 400V | 700V | ||
| Output contacts | 3NO | |||
Unstable voltage conditions are one of the leading causes of equipment failure, shortened service life, and production waste in three‑phase installations. Motors may overheat, PLCs can misinterpret control sequences, and power electronics can prematurely fail when exposed to even fleeting voltage irregularities.
This protector addresses that challenge at the source by acting as an intelligent gatekeeper between the power distribution network and your critical loads. By detecting anomalies early and responding instantly, it:
Prevents electrical stress that accelerates wear and tear
Saves repair and replacement costs over equipment lifetimes
Increases uptime and operational confidence
Makes power health visible rather than obscure
Every unit incorporates finely tuned sensing and switching mechanisms that react with speed and accuracy — protecting equipment before damage occurs.
The six‑display architecture isn’t just aesthetic — it conveys actionable insights at a glance, empowering rapid decisions in live environments.
Whether it’s a workshop line, a production panel, or a complex processing setup, this protector adapts to varied voltage norms and operational rhythms.
Industrial conditions demand resilience. We use flame‑retardant materials, robust circuit designs, and rigorous quality testing to ensure reliability over years of continuous service.
Q: How does this protector improve equipment lifespan?
A: By actively isolating the load whenever voltage falls outside safe boundaries, it prevents heat buildup, electrical stress, and insulation degradation that accelerates motor and electronic wear.
Q: Can settings be adjusted by the user?
Yes. Overvoltage, undervoltage thresholds and trip delays can all be adjusted for tailored performance based on the specifics of the electrical environment.
Q: What happens after a trip?
Once the voltage returns to the preset safe range and stays stable through the configured restart delay, the protector automatically restores power without manual reset.
Q: Is installation difficult?
No. The DIN‑rail mount and clear electrical labeling make installation and ongoing maintenance straightforward for qualified electricians.
Q: Can this protect against phase loss or imbalance?
While its core function is voltage protection, the six‑display system helps detect abnormal voltage conditions across phases, signaling when imbalance or phase anomalies occur.
