3 Phase Surge Protector

LSP: Your Trusted 3 Phase Surge Protector Manufacturer

LSP is a leading global supplier of 3 phase SPD solutions, serving over 1,200 companies worldwide, including leading solar, industrial, and infrastructure brands, system integrators, and project developers.

As a trusted manufacturer of surge protection devices, we offer customized 3 phase surge protection devices for industrial, commercial, and residential applications, ensuring that each solution meets specific installation and safety requirements.

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AC 3 Phase Surge Protection – Type 1 SPD (FLP25 Series)

3 Phase Surge Protector Type 1 range is designed to meet all protection needs of low voltage installations against lightning and industrial surges.

These products comply with IEC/EN and environmental standards. The ranges are classified by product type and their power supply network.

AC 3 phase surge protector FLP25-275/4S

This 3 phase Surge Protector used for TN-S systems; The 3 phase Surge Protection Device Impulse discharge current (10/350 μs) Iimp up to 25kA.

AC 3 phase surge protector FLP25-275/3S+1

This 3 phase Surge Protection used for TT or TN-S systems; The 3 phase Surge Protcetor is particularly useful in a high lightning density area where the risk of heavy surge current or even direct strike.

AC 3 phase surge protector FLP25-275/3S

This 3 phase Surge Protector used for TN-C systems; The 3 phase Surge Arrester installed at the load center’s main circuit breaker, e.g. main distribution board.

AC 3 Phase Surge Protector – Type 1+2 SPD (FLP12,5 Series)

3 Phase Surge Protector (Type 1+2) is characterized by a 10/350 µs and 8/20 µs lightning current waveform and tested accroding to IEC/EN 61643-11.

AC 3 phase surge protector FLP12,5-275/4S

This 3 phase Surge Protector used for TN-S systems; The 3 phase Surge Protection Device Impulse discharge current (10/350 μs) Iimp up to 12,5kA.

AC 3 phase surge protector FLP12,5-275/3S+1

This 3 phase Surge Protection used for TT or TN-S systems; The 3 phase Surge Protector is installed at the origin of the AC installation equipped with LPS.

AC 3 phase surge protector FLP12,5-275/3S

This 3 phase Surge Protector, designed for TN-C systems, protects all electrical installations against lightning strikes by discharging the surge current and preventing it from spreading to the equipment.

AC 3 Phase Surge Protector – Type 1+2 SPD (FLP7 Series)

These 3 Phase Surge Protectors are designed to be connected in multi-pole configuration to protect 3-phase and 3-phase+Neutral AC networks, and for TN-C, TN-S, TN-C-S TT, and IT power supply systems.

AC 3 phase surge protector FLP7-275/4S

This 3 phase Surge Protector used for TN-S systems; The 3 phase Surge Protection Device Impulse discharge current (10/350 μs) Iimp up to 7kA.

AC 3 phase surge protector FLP7-275/3S+1

This 3 phase Surge Protection used for TT or TN-S systems; The 3 phase Surge Protector adapt to unique trigger release, effectively solve the isolation and extinguishing arc.

AC 3 phase surge protector FLP7-275/3S

This 3 phase Surge Protector is used for TN-C systems; The 3 phase Surge Arrester is designed to be installed at the service entrance of low-voltage systems to protect against transient overvoltages.

AC 3 Phase Surge Protector – Type 2 SPD (SLP40 Series)

3 Phase Surge Protector SLP40 series is characterized by an 8/20 µs lightning current waveform and tested accroding to IEC/EN 61643-11.

AC 3 phase surge protector SLP40-275/4S

This 3 phase type 2 SPD used for TN-S systems; The 3 phase Surge Protection Device Nominal discharge current (8/20 μs) In = 20kA, Maximum discharge current (8/20 μs) Imax = 40kA.

AC 3 phase surge protector SLP40-275/3S+1

This 3 phase type 2 SPD used for TT or TN-S systems; The 3 phase Surge Protector adapt to unique trigger release, effectively solve the isolation and extinguishing arc.

AC 3 phase surge protector SLP40-275/3S

This 3 phase type 2 SPD is used for TN-C systems; The 3 phase Surge Arrester is characterized by an 8/20 µs lightning current waveform.

AC 3 Phase Surge Protection – Type 2+3 SPD (SLP20 Series）

This 3 phase Surge Protector is used for TN-C systems; The 3 phase Surge Arrester is characterized by an 8/20 µs lightning current waveform.

AC 3 phase surge protector SLP20-275/4S

This 3 phase Surge Protector used for TN-S systems; The 3 phase Surge Protection Device Nominal discharge current (8/20 μs) In = 10kA, Open circuit voltage (1.2/50 μs) Uoc = 20kV.

AC 3 phase surge protector SLP20-275/3S+1

This 3 phase Surge Protection used for TT or TN-S systems; The 3 phase Surge Protector is generally installed in sub-distribution or machine control cabinets.

AC 3 phase surge protector SLP20-275/3S

This 3 phase Surge Protection Device is used for TN-C systems; These 3 phase Surge Protector SLP20 series are rated for indoor use or fixed into a waterproof box for outdoor use.

AC 3 Phase Surge Protection Device – Type 3 SPD (TLP Series）

3 Phase Surge Protector TLP series is characterized by an 1.2/50 µs lightning current waveform and tested accroding to IEC/EN 61643-11.

AC 3 phase surge protector TLP-255/2S

3 phase AC Surge protector for TN-S, TN-C, or TT systems, U_oc 6 kV, I_n 3 kA.

AC 3 phase surge protector TLP-60/2S

3 phase AC Surge protector for TN-C, TT, or TN-S systems, U_oc 2 kV, I_n 1 kA.

AC 3 phase surge protector TLP-30/2S

3 phase AC Surge protector for TT, TN-S, or TN-C systems protects electronics and ensures reliable operation.

The Trusted Partner for Certified 3 Phase Surge Protectors

We hold TUV, CB, CE, and ISO 9001 certifications. Our 3 phase surge protectors are rigorously tested to IEC/EN 61643-11 and IEC/EN 61643-31 standards, guaranteeing performance, safety, and compliance with international requirements.

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3 Phase Surge Protector Applications for Reliable System Safety

3 phase surge protection devices play a critical role across various environments, including industrial plants, commercial buildings, infrastructure projects, and residential communities.They safeguard sensitive equipment against lightning strikes, switching surges, and transient overvoltages, ensuring reliable operation of electrical systems.

Solution surge protection device for Security Systems

Industry

Use 3 phase power surge protector for industrial plants and factories to safeguard sensitive machinery. They ensure equipment safety, maintain production continuity, and reduce maintenance costs.

Solution surge protection device for Industrial Photovoltaic Systems

Commercial

3 phase surge protector in commercial buildings, safeguard essential services such as lighting systems, HVAC units, and elevators from overvoltages and electrical disturbances, ensuring smooth operations and protecting valuable equipment.

Solution surge protection for E-mobility

Residential

3 phase surge protector for home appliances and smart systems are designed to safeguard household electronics and appliances from lightning or grid surges, ensuring their reliable operation and providing peace of mind for homeowners.

Data Center

3 phase SPD for critical IT and server protection protects critical IT equipment and servers from overvoltages and lightning-induced surges. Installed at main entry points and sub-distribution boards, they safeguard downstream equipment, ensuring uninterrupted operation and reliable system performance.

E-Mobility

3 phase surge protector for EV charging stations in the distribution cabinets of charging stations provide overall system protection. They safeguard the power distribution system and main charging station equipment, ensuring safe and reliable operation.

Water Treatment

3 phase SPD for water treatment plant control panels installed at main control panels and distributed control systems (DCS) provide first-level protection for the system, protecting critical control equipment and ensuring operational reliability.

Why LSP’s 3 Phase Surge Protectors Stand Out

At LSP, we engineer our 3 phase surge protectors to perform under the most demanding conditions. Whether you need an industrial 3 phase surge protector, a commercial 3 phase panel SPD, or a residential 3 phase surge arrester, LSP ensures top-tier performance.

High-Quality MOV Materials

We use the premium LKD MOVs in our 3 phase surge protectors, providing excellent durability. Type 1 3 phase surge protectors can withstand impulse discharge current (Iimp) up to 25kA(10/350 μs) and maximum discharge current (Imax) up to 100kA (8/20µs), ensuring superior performance.

Innovative Tripping Device

Our independently developed low-temperature tripping device enhances arc extinction, ensuring the 3 phase surge protector can safely disconnect from the power grid during a fault, enhancing arc extinction and guaranteeing continuous safety.

Flame Retardant Housing

The plastic housing is made of PA6+GF30% flame-retardant material, effectively preventing spontaneous combustion of the SPD.

Thick Metal Components

We use metal lead pins with 0.8 mm thickness and 8 mm width—45% above average—allowing 3 phase surge protectors to handle high potentials without breaking.

Rigorous Testing

All our 3 phase surge protectors undergo extensive testing, including lightning impulse tests, thermal stability, 48-hour salt spray, glow wire, and current impulse tests, to ensure reliable and safe performance.

Comprehensive Surge Protection You Can Trust

We aim to provide the market with the safest and most reliable 3 phase surge protectors, meeting the needs of both direct use and global distribution. All surge protection devices (SPDs) are manufactured under strict quality management and undergo comprehensive testing to ensure their performance and reliability.

Professional Manufacturing

Our production process strictly adheres to ISO9001 to ensure compliance and efficiency. Our surge protectors have passed TUV, CB and CE certifications, ensuring that you can use them directly in your system or sell them globally with confidence.

5 Years Worry-free Warranty

We aim to provide you with hassle-free purchasing support. Our surge protector have a 5-year warranty. We offer a 7-day return and 30-day exchange policy. Shipping costs and customs duties are borne by us during the warranty period.

Provide the Most Suitable Solution for You

We have independent surge protector R&D capabilities. Our R&D team with 20 years of experience will provide you with technical support and help you complete each stage of your project.

Marketing Support

We offer more to our valued customers. Including high-quality corrugated cardboard packaging, 3D animation materials for marketing, and regulatory and certification support.

Deliver on Time

Our experienced team manages inventory and production, maintaining a steady stock of materials to handle peak periods. We complete and ship regular spds orders within 15 days and custom orders within 30 days, maintaining a 96% on-time rate!

We aim to provide the market with the safest and most reliable surge protection products, catering to your needs for direct use or global sales. All surge protector products are manufactured under strict quality management and undergo comprehensive and rigorous testing before shipment to ensure quality and reliability. Our spd products are certified by TUV, CE, CB.

Surge Protection Device Manufacturer LSP automated production machine

3 phase surge protector SPD 5 Years Worry-free Warranty

3 phase surge protector SPD Research and Development R&D

3 phase surge protector SPD Packing and Certifications

About 3 Phase Surge Protector

A 3 phase surge protection device (SPD) is essential for residential, commercial, and industrial installations, ensuring compliance with IEC 61643 standards.

What is a 3 Phase Surge Protector?

A 3 phase surge protector (also known as a 3 phase surge protection device) is an essential electrical safety device designed to safeguard wiring systems, consumer units, and sensitive equipment from transient overvoltages on three-phase AC power lines. These devices are widely used as 3 phase SPD for residential, commercial, and industrial installations to prevent damage caused by lightning strikes, switching operations, or power surges.

3 Phase Surge Protector Working Principle

Surge protection devices (SPDs) consist of at least one non-linear component, such as a varistor or spark gap, whose electrical resistance changes depending on the applied voltage. Their main function is to divert discharge or impulse currents and limit overvoltages reaching downstream equipment.

Learn how surge protection devices 3 phase operate to protect critical systems. Here’s a clear explanation:

Normal operation: In the absence of surges, the SPD remains inactive. It behaves like an open circuit, maintaining isolation between the active conductors and earth without affecting system performance.

During a surge: When an overvoltage occurs, the SPD rapidly lowers its impedance—within just a few nanoseconds and diverts the impulse current safely to ground. At this moment, it behaves like a closed circuit, ensuring that the overvoltage is clamped to a safe level for connected electrical equipment.

After the surge: Once the transient has passed, the SPD restores its high impedance state and resumes its open-circuit condition, ready to protect the system again.

Safe Disconnection: When the SPD reaches the end of its service life, the integrated disconnector automatically isolates the protection module to ensure safety and system reliability.

3 Phase Surge Protector Wiring Diagram & Installation

3 Phase Surge Protector Device is designed to protect electrical equipment from voltage spikes caused by events like lightning strikes or switching operations.

There are different types of SPDs used for varying applications, and they are wired differently based on the system requirements.

Play Video about Three-Phase Type 2 Surge Protective Device SPD Wiring Diagram & Installation for Cabinets, Distribution Box

Guide to choosing the right 3 phase surge protector based on standards and ratings

Choosing the appropriate surge protection device (SPD) is essential to safeguard electrical systems and connected equipment. SPDs are classified according to international standards such as IEC 61643-11, EN 61643-11, and VDE 0675-6-11, ensuring reliable performance under different surge conditions. Refer to the table below for detailed SPD ratings and classifications to select the most suitable device for your system.

EN 61643-11:2012	IEC 61643-11:2011	VDE 0675-6-11:2002	In (80/20μs)	Imax (8/20μs)	Iimp (10/350μs)	Uoc (1.2/50μs)
Type 1	Class I	Class B	25 kA	100 kA	25 kA	/
Type 1+2	Class I+II	Class B+C	20 kA	50 kA	7 kA	/
Type 1+2	Class I+II	Class B+C	20 kA	50 kA	12.5kA	/
Type 2	Class II	Class C	20 kA	40kA	/	/
Type 2+3	Class II+III (or III)	Class C+D (or D)	10 kA	20kA	/	20 kV
Type 2+3	Class II+III (or III)	Class C+D (or D)	5 kA	10 kA	/	10 kV

FAQ - 3 phase surge protector

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What types of 3 phase surge protectors are available for different installations?

For diverse applications in industrial, commercial, and residential settings, we offer Type 1, Type 2, or combined Type 1+2 and Type 2+3 three phase surge protectors. They are available in both DIN-rail mounted and panel-mounted configurations to suit various installation needs.

Can 3 phase surge protectors be installed outdoors?

Yes. We supply 3 phase SPDs that are specifically designed for outdoor use. They provide robust protection for power distribution systems and sensitive equipment, ensuring reliable performance even in harsh weather conditions.

Are there 3 phase surge protectors with monitoring capabilities?

Absolutely. Many of our models come equipped with advanced monitoring features, such as remote signaling and clear status indicators. This allows operators to easily monitor the SPD's status and perform timely maintenance, ensuring continuous protection.

Can 3 phase surge protectors be used in residential or commercial settings?

Yes. We offer a range of three phase surge protection devices specifically engineered for the lower-power or distributed loads found in both residential and commercial buildings, providing effective and reliable surge protection for these environments.

Are your 3 phase SPDs suitable for TT and TN systems?

Yes. Our comprehensive product line includes specific models for all common power distribution systems, including TT, TN-S, and TN-C-S (PME) systems. We offer both 3+1 and 4-pole configurations to meet the specific grounding requirements of your installation.

How do I know which 3 phase SPD type is right for my application?

Choosing the right SPD depends on your specific installation environment and the level of protection needed. Type 1 SPDs are used at the service entrance for protection against direct lightning strikes, Type 2 SPDs are installed in distribution boards for general surge protection, and Type 3 SPDs offer final, fine-level protection for sensitive equipment. Our team of experts can assist you in selecting the ideal solution. Contact LSP for expert guidance in selecting the right three phase SPD for your project.