Self-Resetting Over and Under Protector

The Self-Resetting over and Under Protector is produced by Pugao(PLANNTER), we are one of leading manufacturers and suppliers in China. We provide customized service (OEM/ODM) to adjust the product specifications and brand identity according to customer requirements. To protect your equipment with this adjustable voltage and current protector, you can monitor the overcurrent/voltage values in real time.

● PC flame-retardant shell：Fire insulation is safe and reliable

● High quality terminal：Good anti-corrosion, rust prevention and conductivity

● Din rail buckle：Easy to install and operate

As a manufacturer for more than 10 years, we have our own factory and technical team, forming a complete system from R&D, production to quality inspection. The factory holds ISO9001 and other international quality management system certificates, all products have been strictly tested, we support OEM/ODM service, and we can customize the production according to your drawings and parameter requirements. The Self-Resetting over and Under Protector can be protective. If the line is over-voltage, under-voltage, over-current, etc., can instantly cut off the circuit, avoiding the risk of fire caused by damage to electrical equipment. And you can set the over-voltage value, under-voltage value, over-current value, circuit recovery time, over-current protection reset time and so on according to the actual situation and power consumption.

Key Benefits

The Self-Resetting Over and Under Protector is engineered to provide comprehensive safety for electrical circuits. Manufactured by Pugao(PLANNTER) with over 10 years of experience, this device combines robust construction with intelligent automation to safeguard your equipment against power anomalies.

Automatic Operation

Eliminate the need for manual intervention with smart self-reclosing technology:

• Auto-Cut: Instantly disconnects the circuit if over-voltage, under-voltage, or over-current is detected, preventing equipment damage and fire risks.
• Auto-Restore: Once the fault is cleared and parameters return to normal, the device automatically restores power after a pre-set delay, ensuring continuous operation without manual resetting.

Adjustable Thresholds

Customize the protection settings to match your specific load requirements and local grid conditions:

• Voltage Settings: Set precise over-voltage and under-voltage limits to trip the device only when necessary.
• Current Settings: Adjust the over-current value to protect sensitive electronics or heavy-duty appliances.
• Timing Control: Configure the circuit recovery time and over-current protection reset time to prevent nuisance tripping.

Protection Type

Built with a PC flame-retardant shell and high-quality corrosion-resistant terminals, this protector offers reliable isolation against critical electrical faults:

• Over-Voltage: Prevents burning of circuit boards and motors caused by voltage spikes.
• Under-Voltage: Protects motors from overheating and stalling due to low voltage.
• Over-Current: Guards against line overloads that can lead to insulation failure and fires.

Installation

Designed for ease of integration into existing electrical panels:

• DIN Rail Mounting: Features a standard DIN rail buckle for quick and secure installation in distribution boxes.
• Compact Design: Fits easily alongside other modular devices, saving space while providing critical protection.

Reconnection Delay

Enhance safety with intelligent delay mechanisms:

• Power-Off Protection: If the power is suddenly cut and restored, the Self-Resetting Over and Under Protector will not connect immediately. It waits for the set delay time to ensure the voltage is stable before re-energizing the load.
• Equipment Safety: This delay protects appliances like refrigerators and air conditioners from "short-cycling" or receiving unstable power immediately after an outage.

Product features

1. This Self-Resetting over and Under Protector has passed CE, CCC and ISO certification in line with the enterprise standard production of single-phase self-reclosing device.

2. If the line is over-voltage, under-voltage, over-current, it will automatically cut off the line, if the voltage or current returns to normal, after the pre-set delay time, it will automatically restore and normal power supply, no need to manually operate repeatedly.

3. If the line voltage or current is unstable or suddenly cut off the power, when the power supply is restored, the Self-Resetting over and Under Protector will not be connected to the power supply immediately, which is safer, and the delay time is set according to the need.

Common Applications

The Self-Resetting Over and Under Protector is a versatile safety device designed to secure electrical circuits in diverse environments. By monitoring voltage and current in real-time, it ensures the safety and longevity of equipment across the following sectors:

Residential

In home environments, grid instability can cause significant damage to modern electronics. This protector is essential for:

• Smart Home Systems: Protecting sensitive control hubs and automation systems from voltage spikes.
• Major Appliances: Preventing compressor burnout in air conditioners and refrigerators caused by under-voltage or circuit board damage from over-voltage.
• Consumer Electronics: Safeguarding televisions, computers, and audio systems against power fluctuations.

Industrial/Commercial

For businesses and industrial facilities, downtime is costly. This device provides robust protection for:

• Manufacturing Equipment: Ensuring motors and CNC machines do not overheat or malfunction due to unstable power feeds.
• Commercial Lighting: Protecting large-scale lighting arrays in malls and offices from surge damage.
• Telecommunications: Maintaining the integrity of base station power supplies to ensure continuous connectivity.

Specific Products

Certain high-value or sensitive devices benefit greatly from the adjustable thresholds of this protector:

• HVAC Systems: Heat pumps and air conditioners require stable voltage to start compressors safely.
• Medical Equipment: Diagnostic tools and life-support systems need clean, stable power to operate accurately.
• Water Pumps: Submersible and surface pumps are highly susceptible to damage from under-voltage (phase loss) and over-current.