Address: Wenzhou Bridge Industrial Zone
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Geya: Your Best

Surge Protection Device (SPD) Manufacturer

Geya’s mission is to improve the quality of life and the environment through the use of power supply management technologies and services.

To provide competitive products and services in the home automation,industrial automation and energy management fields is our company’s vision.

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All Types Geya

surge protection devices

What is surge protection deviceSPD)?

The Surge Protection Device (SPD) is a component of the electrical installation protection system. This device is connected in parallel to the power supply circuit of the loads that it has to protect. It can also be used at all levels of the power supply network. This is often the foremost commonly used and most effective sort of overvoltage protection.

SPD connected in parallel features a high impedance. Once the transient overvoltage appears within the system, the impedance of the device decreases so surge current is driven through the SPD, bypassing the sensitive equipment.


Surge protection deviceSPDfunction

A surge protection is a cost-effective solution to forestall downtime, improve the system and data reliability, and eliminate apparatus damage because of transients and surges for both power and signal lines. It is suitable for any facility or load (1000 volts and below). Surge arresters have many functions and might be used anywhere from protecting a home to a utility substation. They are installed on circuit breakers inside a residential home, inside pad-mounted transformers, on pole-mounted transformers, on pole-mounted riser poles and substations.

Typical SPD applications within industrial, commercial, and residential include:

Power distribution, control cabinets, programmable logic controllers, electronic motor controllers, equipment monitoring, lighting circuits, metering, medical equipment, critical loads, back-up power, UPS, HVAC equipment,Communication circuits, telephone or facsimile lines, cable TV feeds, security systems, alarm signaling circuits, entertainment center or stereo equipment, kitchen or household appliances.

Surge protection deviceSPDworking principle

In the most elementary sense, when a transient voltage occurs on the protected circuit, an SPD limits the transient voltage and diverts the current back to its source or ground.

To work, there must be at least one non-linear component of the SPD, which under different conditions transitions between a high and low impedance state.

At normal operating voltages, the SPDs are during a high-impedance state and do not affect the system. When a transient voltage occurs on the circuit, the SPD moves into a state of conduction (or low impedance) and diverts the surge current back to its source or ground. This limits or clamps the voltage to a safer level. After the transient is diverted, the SPD automatically resets back to its high-impedance state.

Surge Arrester Vs Surge Protector

A surge arrester (or lightning arrester) serves the same purpose as a surge protector: they protect electrical equipment from over-voltage conditions. They are both commonly referred to as SPDs (Surge Protection Devices).

The difference between the two is the scale of the protection. Surge arresters are for large-scale protection (medium to high voltage), while surge protectors are for small-scale protection (low voltage). Surge protectors can be appliance-specific – such as a surge protector for washing machine or a surge protector for refrigerator – or a whole house surge protector.

Surge arresters (or lightning arresters) are used by utility companies in power transmission and distribution systems to protect their electronic equipment and infrastructure. They can also be found in large-scale industrial operations, such as mining or oil and gas.

These protect against extremely large fault currents, such as those caused by lightning – hence the name “lightning arrester”.

Surge protectors are used to protect domestic and consumer electrical equipment. They protect electronic appliances in your home like your computer, television, and refrigerator.


Surge protection deviceSPD installation

Locate the SPD as close as possible to the panel to be protected.

Drill and punch a hole within the SPD housing in an exceedingly position to attenuate the length of the connecting wires from the lugs of the SPD to the circuit breaker within the adjacent panel (or fused disconnect lugs).

Where possible, use a close-nippled connection with wires going on to the first breaker at the top of a panel. This ensures optimum protection of all loads connected to the panel.

Use AWG #10 stranded wire or larger (which is quickly available and simply installed) to connect between the SPD and therefore the breaker panel. Avoid sharp bends and excess length within the wiring. Neat and tidy installations aren’t necessarily the foremost effective ones. Short direct connections are best.

SPDs should be connected through an appropriately rated circuit breaker, not into the main lugs of the panel. Where circuit breakers are unavailable or impractical, a fused disconnect switch should be used to connect with the lines and facilitate servicing of the SPD.


Surge protection deviceSPD VS Lightning Protection System

On a basic level, the lightning protection system protects the facility and structure from direct strikes, while SPDs protect electrical equipment and systems against surges or transients.

How the two operate, and the components involved, also vary. Lightning protection system components are always in place and prepared to function, while SPDs monitor internal system voltages and spring into action if a transient voltage occurs on the circuit.

Surge protection device type 1 and type 2

Geya produces and sells surge protection device Type 1 and Type 2, and their definitions are as follows:

Type 1: Permanently connected, intended for installation between the secondary of the service transformer and therefore the line side of the service disconnect overcurrent device (service equipment). Their main purpose is to protect insulation levels of the electrical system against external surges caused by lightning or utility capacitor bank switching.

Type 2: Permanently connected, intended for installation on the load side of the service disconnect overcurrent device (service equipment), including brand panel locations. Their main purpose is to protect the sensitive electronics and microprocessor-based loads against residual lightning energy, motor generated surges ,and other internally generated surge events.

Surge protection device for home

A home surge protector is a device installed to protect all the appliances in your home from any electrical spikes by limiting excess electrical current by blocking its flow or shorting it to the ground. They typically use a feature called metal oxide varistors (MOVs) to protect you against the surge. So, if a power surge occurs, the device will keep any harmful electrical currents from damaging your home devices. Surge protectors are typically installed connected to a home’s electrical service box.

Power surges can enter your home through electrical systems like A/C, pool pump, generator, solar, cable, network, and communication connections, so all these devices’ interior and exterior should be protected. In addition to the device being installed on the main electrical panel, we also recommend adding protective devices to appliances (which are somethings we will also help with).

Surge protection deviceSPD VS Lightning Protection System

On a basic level, the lightning protection system protects the facility and structure from direct strikes, while SPDs protect electrical equipment and systems against surges or transients.

How the two operate, and the components involved, also vary. Lightning protection system components are always in place and prepared to function, while SPDs monitor internal system voltages and spring into action if a transient voltage occurs on the circuit.


Download Geya SPD Catalog PDF


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Why Geya

Surge Protection Device (SPD)

All Surge Protection Device produced by GEYA will be carried out in strict accordance with the production process. GRYA has a detailed archive to ensure that there is no error in Surge Protection Device’ development, production, acceptance, and sales.

For the performance of the Surge Protection Device, we will carry out strict testing, and all items can be sold and shipped only after passing the test.

GEYA provides sustainable solutions that help our customers effectively manage electrical, hydraulic, and mechanical power –more safely, more efficiently, and more reliably.

Under normal use, during the warranty 18 months period, if the Surge Protection Device has a problem or damage, GEYA will actively and responsibly take the necessary remedial measuresand repair or replace it free of charge. After the warranty period expires, we will still provide life-long paid maintenance services for the product.

From our beginning more than 10 years ago, our products and services have helped people work more safely, be more energy-efficient, and reduce emissions.

Geya Electric has been designing and manufacturing low voltage electrical devices for industrial applications. Our current products offer a wide range of low voltage electrical and automation control items, including MCB, MCCB, RCD, Switch disconnector, Contactor, Relay, Timer, Distributor Box and other series of related accessories and components ., also, we provide series of solar energy system applications, including solar charge controller, solar pump inverter, as well as solar power system.

GEYA Electric has a range of over 100 products that comply with the strictest requirements of international standards such as CCC, CE, CB, SAA, SEMKO, TUV, and Rosh.

GEYA will execute according to user requirements to ensure high quality, high service, and high speed to complete delivery tasks.

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Geya Surge Protection Device (SPD)

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At GEYA, we understand the need for keeping all devices safe, while making your business competitive. With over 10 years’ experience, GEYA products are certified CCC, CE, CB, SAA, SEMKO, TUV and ROSH industry standards.