We are a trusted surge protector devices manufacturer in China specializing in manufacturing high-quality surge protective devices (SPDs).
With a thorough understanding of standards and regulations, LSP manufactures millions of surge protector devices (SPDs) every year.
Our teams bring surge protector devices (SPDs) with our unique client-focused service & quality to the closest possible to the market demand.
Type 1 Surge Protector Device (SPD) 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.
Equipment connected to Alternating Current (AC) networks may be exposed to various undesirable electrical phenomena, which can disrupt their operation, cause failures, shorten their lifespan, or even destroy them.
FLP25-275/4(S)
for three phase TN-S networks
FLP25-275/3(S)+1
for three phase TT and TN-S
FLP25-275/3(S)
for three phase TN-C networks
FLP25-275/2(S)
for single phase TN-S networks
FLP25-275/1(S)+1
for single phase TT and TN-S
FLP25-275/1(S)
for single phase TN-S, TN-C, TT (only L-N)
DIN-Rail AC Type 1 surge protector device SPD FLP25 series is developed as the best solution available to protect service entrance at an industrial site, especially those with existing lightning protection systems or meshed cage applications.
FLP25 series DIN-Rail AC Type 1 surge protector device SPD is particularly useful in a high lightning density area where the risk of heavy surge current or even direct strike is high (eg: buildings equipped with lightning rods).
Nominal voltage Un: 120V 230V 400V
Max. continuous operating voltage Uc: 150V 275V 320V 385V 440V
Type 1 / Class I / Class B
Impulse discharge current (10/350 μs) Iimp = 25kA @ Type 1
Nominal discharge current (8/20 μs) In = 25kA @ Type 2
Maximum discharge current (8/20 μs) Imax = 100kA @ Type 2
Protective elements: Metal Oxide Varistor (MOV), Gas Discharge Tube (GDT)
10/350 µs Waveform (Type 1 SPDs): features a rise time of 10 microseconds and a more protracted duration of 350 microseconds.
Iimp 10/350 µs Waveform of Type 1 Surge Protective Device
Monobloc design and DIN rail installation
Visual and remote status indication
High discharge capacity due to heavy-duty zinc oxide varistor / GDT combination
Reliable thermal disconnect device
Energy coordination with other arresters of LSP product family
TUV, CB and CE certification. Surge Protector Devices (SPD) tested accroding to IEC/EN 61643-11
Type 1 AC Surge Protector Device (SPD) are heavy-duty devices designed to be installed at the origin of AC installations equipped with a Lightning Protection System (LPS).
AC Type 1 surge protector device (SPD) is characterized by a 10/350 µs lightning current waveform.
DIN-Rail AC Type 1 surge protector devcie SPD installed at the load center’s main circuit breaker, e.g. main distribution board.
An AC Type 1 surge protector device (SPD) with remote signaling terminals is designed for remote monitoring and management.
These terminals facilitate real-time monitoring of the SPD’s operational status, provide alerts in case of faults, and enhance system safety by enabling quick response to issues.
Wiring Diagram for Green Light on a FLP25-275/3S+1
Wiring Diagram for Red Light on a FLP25-275/3S+1
Type 1 Surge Protector Devices (SPDs) protect residential, industrial, hospital, and commercial buildings from electrical surges, especially from lightning, ensuring safety, reliability, and longevity of electrical systems.
Industrial environments often house critical machinery and sensitive electronic controls that are highly susceptible to damage from electrical surges.
Type 1 surge protector devices are essential in such settings to protect against the high-energy transients that can result from lightning strikes or heavy-duty electrical operations.
Installing these devices at the main distribution boards helps to maintain operational continuity and prevent costly downtimes.
In commercial buildings, the reliability of electrical systems is paramount.
From office complexes to shopping malls, the protection of lighting systems, HVAC units, elevators, and other essential services is critical.
Type 1 surge protector devices ensure that the electrical infrastructure remains intact during electrical disturbances, thereby safeguarding the business operations and enhancing the safety of occupants.
Homes have lower electrical demands than industrial sites but are still vulnerable to surges, especially from lightning.
Installing Type 1 surge protector devices at service entrances protects household appliances and electronics, ensuring safety, safeguarding investments, and preventing costly damages.
This simple measure provides peace of mind for homeowners.
In hospitals, Type 1 Surge Protector Devices (SPDs) are used to protect medical equipment, power systems, and data security from high-energy surges and transient overvoltages.
By ensuring the stable operation of equipment and compliance with safety standards, Type 1 surge protector devices (SPDs) help maintain continuous patient care and the reliable functioning of critical hospital services.
Reliable Type 1 surge protector device SPD is designed to meet the protection needs of installations against lightning and surges. Get Type 1 SPD price now!
As a professional surge protector device manufacturer, LSP believes that a Type 1 surge protective device has the following distinct features:
Installation location:
It is usually installed at the distribution panel of a transformer, or at the incoming line of a building, or on the main distribution panel of an industrial park, in order to intercept and divert large currents before they reach sensitive equipment.
Protection Level:
With a 10/350 waveform, the Iimp values are typically 7kA, 12.5kA, 25kA, 50kA, and 100kA. It is suitable for protecting against large surges caused by direct lightning strikes or transmitted through power lines.
Note: The term “10/350 waveform” refers to an impulse current waveform with an actual wavefront time of 10ms and a half-value time of 350ms.
Specifically in the “10/350 waveform”, “10” represents the time it takes for the impulse pulse to reach 90% of its peak current value while “350” represents the time from peak current to half-peak value.
This type of waveform is commonly used to simulate lightning impacts on power systems, especially in surge protector device testing; it’s a typical curve representing lightning striking earth.
In practical applications, the 10/350 waveform is used to test surge protectors’ tolerance levels ensuring they can protect power systems from damage during a lightning strike.
Surge Protective Device Coordination:
SPD Coordination with the upstream MCCB / MCB or fuse: The upstream a Type 1 Surge protector device SPD must be equipped with a dedicated MCCB / MCB or fuse. The amperage of the MCCB is usually 200A, or the amperage of the fuse is usually 250A, and the main switch, i.e., ACB or MCCB, starts at least from 250A.
In case of a surge event, if Type 1 Surge Protector SPD is damaged, it will coordinate with the front-end MCCB or fuse to disconnect or isolate from the system to ensure normal continuous operation of power supply system.
Cable Size
Requirements for installing wires: The wires used during the installation of a Type 1 surge protector device have certain requirements. The L line and N line (minimum cross-section) must be at least 6 mm2, the ground wire (minimum cross-section) must be at least 16 mm2, and it is required that the main switch is connected to a dedicated MCCB or FUSE with a wire length (referred to as L1), from the dedicated MCCB or FUSE to the Type 1 surge protector device SPD with a wire length (referred to as L2), and from the Type 1 surge protector device to the grounding strip with a wire length (referred to as L3). The total length of these three connecting wires should be kept as short as possible i.e., L1 + L2 +L3 < 50cm.
Compliance and Standards:
Only surge protector devices (SPD) that comply with CE, TUV, CB certifications are considered high-quality. It should be noted that these certifications are based on the IEC 61643-11 or EN 61643-11 standard system, which differs somewhat from the UL 1449.
Surge protector device SPD type test class classification:
Class B = Class I = Type 1 based on IEC 61643-11 (International), EN 61643-11 (Europe), EN 61643-11, NF EN 61643-11 (France) or VDE 0675-6-11 (Germany).
Used for Different Network
Type 1 surge protector devices (SPDs) are commonly used in TN-C, TN-S, TT, IT power supply systems.
Used for Single-phase or three-phase:
Type 1 surge protector SPD are usually used for three-phase electricity, less commonly for single-phase electricity and rarely used by household users.
Type 1 Surge Protector Device (SPD) for Single-phase Network
Type 1 Surge Protector Device (SPD) for Three-phase Network
Used for AC or DC:
Type 1 surge protector device (SPD) are usually used for AC power, less so for DC power;
Type 1 Surge Protector SPD in AC Power Systems
The type 1 SPD is primarily designed to protect AC systems, such as the main distribution board or distribution box of a building. Its main purpose is to prevent damage to equipment and circuits caused by powerful surges due to direct or nearby lightning strikes.
Lightning surges typically propagate through power lines, and these types of surges occur more frequently in AC systems. Therefore, a type 1 SPD must have a sufficiently high surge withstand capability, typically able to handle up to 25kA or higher currents with a waveform of 10/350μs.
Type 1 Surge Protectors in DC Power Systems
Although surges may also occur in DC systems, compared with AC systems, the occurrence of surges in DC systems is relatively less frequent and lower energy. Therefore, the demand for type 1 surge protector (SPD) in DC systems is not as common as it is in AC systems.
Large-scale photovoltaic power generation system or direct current transmission system requires type 1 DC surge protector device (SPD) to prevent lightning strikes and surges.
Structural Appearance Design
Type 1 surge protector device (SPD) usually adopt monobloc design;
A type 1 surge protector device (SPD) mainly deals with direct lightning strikes or very strong electrical surges; this high-energy surge places extremely high demands on the surge protector. Monobloc design ensures that all components and connections will not loosen or be damaged during the surge process providing more stable protection.
Pluggable designs may have potential failure points at mechanical connection points such as poor contact issues. However, monobloc design eliminates these potential failure points improving overall reliability and durability.
Monobloc design reduces the possibility of human operation avoiding protection failures or other safety hazards caused by mis-plugging or unplugging.
Monobloc designs are usually more compact, reducing the space occupied in the distribution board. This is particularly important for situations where installation space is limited.
It is not easy to be the best Type 1 Surge Protector SPD, as a professional Surge Protector SPD manufacturer, we analyze from the following 5 points why to choose LSP’s Type 1 Surge Protector SPD.
1. Lightning Impulse discharge current Iimp (10/350 μs)
Thanks to select high-quality components and parts used for Type 1 Surge Protector SPD, making the FLP25 series the best Type 1 Surge Protector SPD.
L pole:
NPE pole:
2. Residual Voltage Level (Up)
Residual voltage is the peak voltage allowed by a surge protector during normal operation. The lower the residual voltage, the better the protection effect.
The SPD should be able to respond within nanoseconds, eliminating transient overvoltages as quickly as possible.
This is the feature that Type 1 surge protector SPD must possess to be the best.
Thanks to monobloc design, wider dual-claw contacts and components connected directly with metal screw, making type 1 surge protector to be the best SPD.
Undergone rigorous testing according to IEC/EN 61643-11 by TUV Rheinland laboratories and LSP obtained CB, TUV mark and CE certification. This proves that FLP25 series are the best Type 1 Surge Protector SPD.
For help you understand what does Type 1 SPD made of (Internal Structure)? And how does Type 1 Surge Protectror SPD work, we take a 3D animation for help you understand it.
As a reputable manufacturer of surge protector devices, LSP thinks that a Type 1 surge protective device (SPD) has the following specifications:
A Type 1 Surge Protector Device (SPD) is designed to protect electrical installations from direct lightning strikes and high-energy surges.
These devices are typically installed at the main service entrance and are suitable for installations where a direct lightning strike is possible. Here are the typical specifications of a Type 1 Surge Protector SPD:
Operating Voltage (Un):
The nominal voltage at which the (Surge Protector) SPD is designed to operate. Typical values: 230 V AC for single-phase or three-phase systems.
Max. continuous operating voltage (Uc):
Typical values: 275V 320V 385V 440V for single-phase or three-phase systems.
Impulse discharge current (Iimp 10/350 µs waveform):
This is the most common waveform used to test Type 1 Surge Protector SPD, as it simulates a direct lightning strike. Standard values: 12.5 kA, 25 kA, 50 kA.
Nominal Discharge Current (In 8/20 µs waveform):
The nominal discharge current (In) is the current that the Surge Protector SPD can handle multiple times without degradation. Typical values: 25 kA.
Maximum Discharge Current (Imax 8/20 µs waveform):
This is the maximum current the Surge Protector SPD can safely discharge without being damaged. Typical values: 50 kA, 100 kA.
Voltage Protection Level (Up):
The maximum voltage that will pass through the Surge Protector SPD during a surge event. The lower the Up, the better the protection. Typical values: 1.5 kV, 1.6kV.
Short-Circuit Withstand Capacity (Isccr):
The SPD’s ability to withstand short-circuit conditions. Typical values: 25 kA, 50 kA, or higher, depending on the installation requirements.
Response Time:
L pole is made of metal oxide varistor (MOV), response time less than 25 nanoseconds, NPE pole is made of spark gap, such as gas discharge tube (GDT), response time less than 100 nanoseconds.
LSP’s reliable surge protection devices (SPDs) are designed to meet the protection needs of installations against lightning and surges. Contact our Experts!
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