Three-Phase Adjustable Voltage Protector with LED Screen

The Adjustable Voltage Protector is an advanced electrical protection device designed to safeguard household and commercial appliances from voltage fluctuations. It automatically disconnects power during overvoltage (up to 300V), undervoltage (as low as 140V) or overcurrent faults and restores supply after a fixed 30-second delay when voltage normalizes. Unlike disposable fuses, it withstands 450V surge without damage, built with flame-retardant casing. With configurable settings, digital display and dual LED indicators, it ensures full automation without manual intervention, providing reliable protection for sensitive equipment and supports standard DIN rail mounting for easy installation.Over-Voltage ProtectionCut-off Protector

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Key Features

- Adjustable Voltage Settings: Customizable overvoltage (230V–300V) and undervoltage (140V–210V) thresholds.
- Wide Current Range: Supports 1A to 100A with multiple default options (40A, 63A, 80A, 100A).
- Automated Operation: Delayed auto-reconnect (1–300S) after voltage stabilization.
- Dual LED Indicators: Visual status monitoring for operational and fault conditions.
- DIN Rail Mounting: Easy installation on standard 35mm rails.

Basic Technical Specifications

Product Name	Digital Display Overvoltage/Overcurrent Auto-Reclosing Protector
Operating Voltage	80~400V
Undervoltage Range	140~200V
Overcurrent Range	10A~63A Adjustable
Overvoltage Range	240~300V
Rated Current	1A~63A
Ambient Temperature	-10~50℃
Mounting Method	Rail Mounting Clip

Detailed Electrical Parameters

Parameter	Value	Unit	Tolerance	Remark
Effective voltage range	AC80~300	V	1%	Can be calibrated and have higher accuracy
Effectlve current range	AC0.1~63.0	A	1%	Can be calibrated and have higher accuracy
Frequency range	40~70	Hz	1%	Can be calibrated and have higher accuracy
Screen refresh rate	>1000	Hz
Table update	0.1~1.0	S	1%	Screen value update
Table algorlthm	Root mean square/RMS			This algorithm should be used in mains power grid
Overvoltage and undervoltage backlash	5	V		Fixed 5V backlash
Timer range	1~999	S	1%	User settings
Action time	0.1~10.0	S	1%	User settings
Effective DC range	DC 80~300	V	1%

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Core Protection & Intelligent Delay Function

1. Superior Self-protection Performance
Unlike destructible disposable fuses, this protector stays intact while cutting power to safeguard loads against surges up to 450V. Made of flame-retardant housing, it is fire & rust resistant for extended service life.
2. Digital Display & LED Indicator
Digital screen with indicator lights enables straightforward real-time circuit status check.
3. Intelligent 30s Delay Auto-reclosing
It instantly trips upon over/under-voltage and overcurrent. After a fixed 30-second delay, it restores power automatically only if grid recovers; otherwise, it keeps waiting to avoid frequent switch damage to appliances.