Explore our high-performance industrial and residential protection devices engineered for maximum reliability and global compliance.
High-capacity 20kA SPD engineered for medium voltage DC systems and industrial factories.
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Robust 40kA lightning protection capability designed for utility-scale solar photovoltaic arrays.
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Premium quality modular contactor designed for efficient motor control and home automation systems.
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Advanced 3-Pole 20kA SPD providing comprehensive protection for medium voltage DC distribution networks.
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High-voltage lightning protection system engineered for commercial solar inverters and wind power grids.
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Modular 4 Normally Open AC contactor designed for DIN-rail distribution boards and smart control panels.
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Ultra-high voltage DC surge protective device designed for robust industrial solar installations.
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Low-voltage system surge protection optimized for sensitive telecommunication and industrial automation lines.
View DetailsLocated in Liushi, Wenzhou, Zhejiang—the renowned "Electrical Capital of China"—Zhejiang Shuorui Electric Co., Ltd. stands at the epicenter of global electrical engineering innovation. We leverage rich regional resources, cutting-edge R&D infrastructure, and a highly skilled workforce to design, manufacture, and distribute world-class electrical protection systems.
Our core philosophy centers on delivering "the most cutting-edge technology, the best quality, the most sincere service, and the most favorable price." By continuously investing in advanced technology research and development, we have established a high-caliber R&D team dedicated to pioneering smart grid safety, overvoltage mitigation, and earth leakage prevention technologies.
We combine aesthetic industrial design with uncompromising functional reliability to deliver market-leading electrical protection.
From raw material procurement to final assembly testing, every single component undergoes strict quality inspection. We utilize state-of-the-art testing equipment to ensure full compliance with international IEC and GB standards, ensuring absolute safety for end-users.
Our comprehensive portfolio covers miniature circuit breakers (MCB), surge protectors (SPD), smart control boxes, AC contactors, overvoltage/undervoltage protectors, and automatic reclosing devices optimized for both AC and DC grids.
We offer end-to-end custom engineering services. From custom voltage thresholds and trip curves to bespoke housing designs and private labeling, our engineering team brings your specific market requirements to life.
How 220V Earth Leakage and Voltage Protectors safeguard modern commercial, residential, and industrial ecosystems.
In today's highly digitized global economy, power quality is no longer just a convenience—it is a critical operational requirement. Fluctuations in grid voltage, transient surges, and earth leakage currents pose severe threats to sensitive electronic hardware, industrial automation systems, and human life. As a premier Wholesale Voltage Protector 220v Earth Leakage Manufacturer, Shuorui Electric engineered solutions directly address these modern grid vulnerabilities.
Earth leakage occurs when electrical current finds an unintended path to the ground, often due to damaged insulation, moisture ingress, or equipment degradation. In a standard 220V AC system, even a minor leakage current (measured in milliamperes) can cause lethal electrical shocks or ignite electrical fires. Concurrently, persistent overvoltage or undervoltage conditions degrade power supply units, shorten the lifespan of household appliances, and cause catastrophic failures in industrial machinery.
Our flagship 220V earth leakage and voltage protectors combine three essential safety mechanisms into a single, compact DIN-rail module:
Tailored electrical safety solutions designed for diverse operating environments across the globe.
Protects expensive consumer electronics, HVAC systems, and smart kitchen appliances from sudden grid surges and persistent neutral faults. The compact DIN-rail design fits seamlessly into standard domestic consumer units, providing peace of mind for families.
Ensures uninterrupted operation of POS systems, server racks, and lighting networks. By preventing nuisance tripping through intelligent delay algorithms, our protectors safeguard business continuity and prevent data loss.
Deployed in factory distribution boards to shield PLCs, variable speed drives, and robotic assembly lines from transient overvoltages. The robust construction withstands harsh industrial environments, high ambient temperatures, and electromagnetic interference.
Pioneering the next generation of smart, IoT-enabled grid protection devices.
As global energy systems transition toward decentralized renewable sources and smart grids, the demands on electrical protection devices are evolving rapidly. Shuorui Electric is at the forefront of this technological shift, actively developing next-generation protection hardware that integrates seamlessly into the broader IoT ecosystem.
Integrating WiFi and cellular communication modules directly into our 220V earth leakage protectors, allowing facility managers to monitor real-time leakage currents, voltage fluctuations, and trip logs remotely via mobile applications.
Utilizing advanced microprocessors to analyze micro-leakage trends over time. By identifying gradual insulation degradation before a catastrophic short circuit occurs, our devices enable proactive maintenance scheduling.
Committed to environmental sustainability, our future product lines utilize halogen-free, highly recyclable flame-retardant plastics and lead-free soldering processes, fully aligning with global RoHS and REACH directives.
Take a virtual tour of our advanced production lines, testing laboratories, and meet our engineering team.
Our products are certified by leading international bodies to ensure seamless integration into any national grid.
Explore our most sought-after electrical protection devices, trusted by distributors and contractors worldwide.
DC lightning surge protection designed for medium voltage solar power systems.
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High-performance DC circuit breaker engineered for demanding solar and battery storage systems.
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Robust surge protective device providing advanced protection for high-voltage DC systems.
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Ultra-high voltage surge protector designed for utility-scale solar farms and energy storage.
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Self-resetting overvoltage and undervoltage protector optimized for residential distribution boards.
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Heavy-duty DC circuit breaker designed for reliable overcurrent and short-circuit protection.
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Three-phase 4P63A incoming line protector with adjustable delay and auto-recovery functions.
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High-voltage DC circuit breaker rated up to 63A, designed for solar combiner boxes.
View DetailsExpert answers to the most common questions regarding 220V voltage protection and earth leakage systems.
The device serves a dual purpose: it continuously monitors the incoming AC voltage to protect connected equipment from overvoltage and undervoltage spikes, while simultaneously monitoring residual current (earth leakage) to prevent hazardous electrical shocks and potential electrical fires caused by insulation breakdown.
When a voltage anomaly (over/under voltage) occurs, the device trips to isolate the load. It then continuously monitors the grid. Once the voltage returns to the normal operating range for a pre-set stabilization period (usually 30-60 seconds), the internal microprocessor triggers the motorized mechanism to automatically reclose the circuit, restoring power without manual intervention.
As a direct manufacturer, we offer extensive customization. You can customize the overvoltage/undervoltage trip thresholds, leakage current sensitivity (e.g., 10mA, 30mA, 100mA), auto-reclose delay times, terminal block configurations, housing colors, and private brand labeling. We also offer custom packaging and user manuals tailored to your target market.
Yes, our advanced smart reclosing switches and leakage protectors feature built-in WiFi modules. They can be integrated with popular smart home platforms and industrial IoT systems, allowing users to remotely monitor power consumption, view real-time grid parameters, and control the switch via mobile apps.
Our manufacturing processes and products strictly adhere to international electrotechnical standards, including IEC 61008-1 (for RCCBs), IEC 60898-1 (for MCBs), and IEC 61643-11 (for surge protective devices). We hold CE, TUV, CB, RoHS, and ISO9001 certifications to ensure seamless compliance globally.
Browse our full range of high-voltage DC and low-voltage AC surge protection devices designed for modern power infrastructure.
Medium-high voltage DC surge protective device with 40kA maximum discharge capacity.
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Adjustable automatic reconnection leakage protection device with integrated voltage monitoring.
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Ultra-high voltage T2 surge protector with 40kA maximum discharge current for solar farms.
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Smart 2P 1-63A leakage protection switch featuring remote control and real-time monitoring.
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Advanced lightning surge protection engineered for high-voltage DC distribution systems.
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3-Pole 40kA surge protective device designed for robust lightning protection in DC grids.
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High-capacity surge protection device optimized for utility-scale solar power plants.
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Ultra-high voltage 40kA surge protective device engineered for heavy-duty industrial lightning protection.
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