THOR Surge Protection | Advanced SPDs & Circuit Protection Devices

About THOR Electric

ZHEJIANG THOR ELECTRIC CO., LTD has been a trusted name in surge protection since 2006. We specialize in developing high-quality, reliable surge protective devices (SPDs), circuit breakers, and lightning protection systems designed to safeguard electrical installations from transient overvoltages and lightning strikes.

Our mission is to connect customer challenges with right-priced, innovative solutions backed by exceptional technical support and service. All products are developed in compliance with international standards including ISO 9001, GB18802.1-2011, and IEC61643.1.

ISO 9001 Certified Manufacturer
Over 18 Years of Industry Experience
In-House THOR Test Centre for Quality Assurance

Our Product Range

Comprehensive surge protection and circuit control solutions for AC, DC, and signal systems. Engineered for reliability, durability, and compliance with global standards.

Type 2 AC Surge Protection Device TRS4 Series

Type 2 AC SPD TRS4

For low-voltage AC systems (TT, TN-C, TN-S). Ideal for whole-house surge protection and HVAC systems.

AC SPD

Type 2 DC Photovoltaic Surge Protector TRS3

Type 2 DC SPD TRS3

Designed for photovoltaic systems. Installed at DC input of combiner boxes and inverters.

DC SPD

Type 1+2 DC SPD TRS3

Combined protection for direct lightning strike and induced surges in solar installations.

DC SPD

Signal SPD Image

Signal Surge Protector

Protects signal stability for 485, RJ45, DB, and other network interfaces.

Signal SPD

PV DC Isolator Switch

Ensures safe disconnection of photovoltaic systems for maintenance and emergency.

Isolator

Lightning Protection Box

Integrated solution for lightning current diversion and equipment protection.

LPS

Lightning Rod

Air terminal for direct lightning strike interception. Corrosion-resistant design.

LPS

Mini Circuit Breaker

Compact protection against overload and short circuit in residential and commercial panels.

Breaker

DC Fuse

High-breaking capacity fuses for photovoltaic and DC motor protection.

Fuse

Contactor

Electromechanical switch for remote control of high-power loads in industrial systems.

Control

Onboard Surge Protector

Compact SPDs for integration into OEM equipment and control panels.

OEM SPD

Signal Transmission SPD

Protects data lines, telecom, and industrial communication systems from surges.

Signal

Applications

Residential

Whole-house surge protection, HVAC, lighting, and appliance safety.

Photovoltaic

DC surge protection, isolator switches, and lightning protection for solar farms.

Wind Power

Surge and lightning protection for turbines and control systems.

Signal Systems

Network, telecom, and industrial data line protection.

Latest Industry Insights

Top Whole House Surge Protectors for HVAC & Refrigerators

April 16, 2025

Learn how to protect your most valuable appliances from power surges and extend their lifespan with the right SPD.

Best 50 Amp & 30 Amp RV Surge Protectors for Campers (2025)

April 9, 2025

Essential guide to choosing the right surge protection for your recreational vehicle and mobile power systems.

Why Mini Breaker Trips Randomly

March 24, 2025

Common causes of nuisance tripping and how to diagnose and fix them in residential electrical systems.

How Do I Protect My HVAC from Power Surges

January 24, 2025

HVAC units are vulnerable to surges. Discover the best practices for surge protection in heating and cooling systems.

Does Lightning Protection Box Really Work

October 21, 2024

An in-depth look at the effectiveness of integrated lightning protection enclosures in real-world scenarios.

Visit Our Blog for More Articles →

Frequently Asked Questions

What is the difference between a surge protector and a surge arrestor?

While the terms are often used interchangeably, a surge protector typically refers to devices used at the point of use (like power strips), whereas a surge arrestor is usually installed at the service entrance or distribution panel to handle larger transient voltages.

Do I need a surge protector on my HVAC unit?

Yes. HVAC units are highly sensitive to voltage spikes and are often the most expensive appliance to replace. A dedicated HVAC surge protector can prevent costly damage from lightning-induced surges or grid switching.

Can circuit breakers go bad without tripping?

Yes. Circuit breakers can fail mechanically or thermally without tripping, especially after repeated stress or age. Regular inspection and testing are recommended to ensure proper operation.

Why does my circuit breaker keep tripping?

Common causes include circuit overload, short circuits, ground faults, or a failing breaker. It's important to identify the root cause to prevent fire hazards and equipment damage.

Do houses still need lightning rods?

Yes, especially in high-risk areas. Lightning rods (air terminals) are part of a complete lightning protection system that safely directs lightning current to ground, preventing structural damage and fire.

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