FAQ
What is an AC power surge protective device?
An AC power surge protective device is used to protect low-voltage AC electrical systems from transient overvoltage caused by lightning, switching operations, or grid disturbances.
Can CRESIN help distributors build a complete SPD product portfolio?
Yes. CRESIN can help distributors select core models for AC power, solar PV, telecom, signal, and industrial applications, making it easier to cover common market demand with a structured product range.
Does CRESIN provide datasheets for each SPD product?
Yes. CRESIN can provide datasheets including product parameters, wiring diagrams, dimensions, discharge current, voltage protection level, response time, standards, and installation information.
What information is needed to recommend the correct SPD?
Normally, the following information is needed: system voltage, AC or DC type, grounding system, installation position, number of poles, discharge current requirement, application scenario, and destination market certification requirements.
Can one SPD be used for all applications?
No. Different applications require different SPD types. AC power systems, solar PV systems, signal lines, telecom lines, and CCTV systems have different voltage levels, current characteristics, wiring structures, and protection requirements.
How should I select SPD voltage?
SPD voltage should match the system operating voltage and grounding system. For AC systems, common Uc options include 385V, 420V, and 440V. For DC systems, especially solar PV systems, common Un options include 600V, 1000V, 1200V, and 1500V DC. The maximum continuous operating voltage Uc of the SPD should be selected based on the rated voltage Un of the power supply system. Uc = 1.1 * Un.
What is the difference between Type 1, Type 2?
Type 1 SPD is usually installed at the main distribution entrance to discharge high-energy lightning currents. Type 2 SPD is installed in sub-distribution boards to limit residual surge voltage.
What is the difference between AC SPD and DC SPD?
AC SPD is used in alternating current power systems such as low-voltage distribution boards, building electrical systems, and industrial panels. DC SPD is used in direct current systems such as solar PV strings, battery systems, and DC control circuits.
What surge protective device products does CRESIN offer?
CRESIN offers AC power SPD, DC power SPD, solar PV SPD, signal SPD, telecom SPD, data line SPD, and surge protection products for electrical distribution, renewable energy, communication, security, and industrial control systems.
Why Do We Need Surge Protective Devices?
Surge protective devices (SPDs) are essential in protecting electronic equipment from the harmful effects of transient overvoltage that can cause damage, system downtime, and data loss. In many cases, the cost of equipment replacement or repair can be significant, particularly in mission-critical applications such as hospitals, data centers, and industrial plants. Circuit breakers and fuses are not designed to handle these high-energy events, making additional surge protection necessary. While SPDs are specifically designed to divert transient overvoltage away from the equipment, protecting it from damage and prolonging its lifespan. In conclusion, SPDs are essential in the modern technological environment.
Surge Protective Device Guidelines
Surge Protective Devices (SPDs) play a critical role in protecting electrical and electronic equipment and to ensure proper protection, it is essential to follow guidelines for selecting and installing SPDs.
How can I get a quotation from CRESIN?
You can send your required SPD type, voltage, pole configuration, discharge current, application scenario, quantity, and destination market. CRESIN will provide a quotation and technical recommendation based on your project needs.
What industries does CRESIN serve?
CRESIN serves solar energy, wind energy, EV charging, telecom, power distribution, industrial automation, security systems, building electrical systems, and OEM electrical equipment manufacturers.
Does CRESIN provide technical support for SPD selection?
Yes. CRESIN provides technical support for SPD selection, wiring diagrams, application scenarios, installation guidance, and product matching for different electrical systems.
How do I choose the right surge protective device?
The correct SPD depends on the power system type, nominal voltage, grounding system, installation location, discharge current, protection level, and application scenario. You can contact CRESIN with your system diagram or technical requirements, and our team will recommend a suitable SPD model.
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The product range includes production technologies for smart capacitors, digital display meters, surge protectors, dedicated backup protection devices for surge protectors, self-resetting over/under-voltage protectors, control and protection switches, and automatic transfer switches for dual power supplies.
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