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Mid-Autumn Festival and National Day Holiday Notice

Date：2023-09-28

Dear Sir/Madam,

With Chinese Mid-Autumn Festival and National Day are approaching, Here will be a holiday for us. Schedule from Sep. 29th to Oct. 6th.

After holiday, Our team will check your needs. Hope to understand!

PS：

Selection of lightning protection products，please click：https://www.thorspd.com/products

WhatsApp/WeChat：+86 15397351020

Best Regards.

THOR Team

2023.9.28

Table of contents

Latest News

TRS5 – Type 1+2 Surge Protective Device Compared with CITEL and DEHN Counterparts

Positioned among the best, TRS5 Type 1+2 SPD goes head-to-head with leading products from CITEL and DEHN—see how each performs across key application areas.

2025-04-29

3-Pole or 4-Pole Surge Protection Devices(SPDs): What's the Difference?

Discover the key differences between 3-pole and 4-pole surge protection devices and how various earthing systems influence proper selection and application.

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Solar surge protection device vs. solar circuit breaker

Explore how solar SPDs and circuit breakers work together to protect PV systems from surges and faults—and how they differ in purpose and function.

2025-03-21

What is single-phase Surge Protection - Do I Really Need It?

Single-phase power requires careful surge protection; here’s everything you need to know to protect your system effectively.

2025-07-01

What is lightning protection zone (LPZ) how LPZ affects your surge protection device selection?

Lightning protection zones (LPZs) are areas that within a building or structure facing varied risk levels of lightning strike and transient overvoltages.

2025-06-23

Understanding 3 Phase Surge Protection and Choosing the Right SPDs

Comprehensive guide to 3-phase surge protection: its function, critical role in electrical systems, and selecting appropriate SPDs for optimal system safety.

2025-06-16

Coordinated Surge Protection: How to Cascade/Layer SPDs for a Meshed Protection Approach?

Install Type 1, 2 & 3 SPDs with proper spacing for cascaded protection. Follow IEC 61643-11 standards to protect industrial systems from surge damage.

2025-06-02

How to Size Surge Protection Devices (SPD): Electrical Ratings & Enclosure Fit

Properly sizing a SPD is a critical first step in building a reliable electrical protection system. Both oversizing and undersizing can compromise performance, safety, and cost-efficiency.

2025-05-19

Understanding the Importance of Surge Protection: Lessons from Fire Extinguishers

What do surge protective devices (SPDs) and fire extinguishers have in common? Discover how this comparison highlights the value of safeguarding electrical systems before disaster strikes.

2025-04-10

Product Center

Type 2 AC surge protection device TRS series

Type 2 AC surge protection device TRS2 series

Type 2 AC surge protection device TRS4 series

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Type 1+2 AC surge protection device B+C series

solar spd,solar surge protector,pv spd,pv surge

Type 1+ 2 DC photovoltaic surge protection device TRS3 series

TRSS-RJ45-24 Rack-mounted Network Signal Surge Protective Device

TRSS-RJ45/4 Network Signal Surge Protective Device

Din Rail RJ45 Surge Protective Device TRSS-RJ45

TNC type coaxial surge protective device

We Are Here For You

Whether you are a electrical power engineer, data technique manager or industrial equipment purchasing manager, please submit your requirements to receive exclusive recommendations for our THOR surge protection devices.

Mid-Autumn Festival and National Day Holiday Notice | Surge protection device SPD - THOR Electric