FAQ
Do EV chargers need communication line surge protection?
Yes. Many EV charging systems use Ethernet, RS485, or other communication lines for monitoring, billing, and control. These lines may also require surge protection.
What type of SPD is used for EV charging stations?
The selection depends on the charging station structure. AC Type 2 SPD is commonly used, while Type 1 or Type 1+2 SPD may be required at the main incoming side if the installation has high lightning exposure.
Where should SPD be installed in an EV charging station?
SPD is usually installed in the main distribution cabinet, charging pile input side, AC distribution panel, communication line, and monitoring system.
What information is needed for wind power SPD selection?
You need to provide turbine system voltage, cabinet layout, signal type, grounding system, installation position, and project protection requirements.
Can CRESIN provide SPD for wind farm communication systems?
Yes. CRESIN can provide surge protection for RS485, Ethernet, telecom, monitoring, and control signal lines used in wind power systems.
Do wind turbines require both power SPD and signal SPD?
Yes. Wind turbines usually require power SPD for electrical distribution and signal SPD for communication, sensor, and control lines.
What equipment in wind power systems is sensitive to surges?
Sensitive equipment includes sensors, communication modules, inverter, control cabinets, monitoring systems, pitch control systems, and grid-connected electrical equipment.
Where should SPD be installed in a wind turbine system?
SPD can be installed in the nacelle control cabinet, tower base cabinet, converter cabinet, generator system, communication lines, sensor lines, and power distribution system.
Can CRESIN support large-scale solar farm projects?
Yes. CRESIN can provide SPD recommendations for rooftop solar, commercial PV systems, utility-scale solar farms, combiner boxes, inverters, monitoring systems, and AC distribution cabinets.
What DC voltage should be selected for PV SPD?
The SPD voltage rating should match the maximum PV system voltage. Common options include 600V DC, 1000V DC, 1200V DC, and 1500V DC.
Should solar PV systems use Type 1 or Type 2 SPD?
If the PV system has an external lightning protection system or a high risk of direct lightning current, Type 1 or Type 1+2 SPD may be required. For many common PV systems, Type 2 SPD is used to protect against induced surges.
Do I need SPD on both DC and AC sides of the inverter?
Yes. The DC side protects the PV array and inverter input, while the AC side protects the inverter output and connected distribution system.
Why do solar PV systems need surge protection?
Solar PV systems are often installed outdoors with long DC cable runs and exposed metal structures. Lightning-induced surges can enter through PV strings, inverter inputs, AC output lines, and monitoring systems.
How can I get a customized surge protection solution?
You can provide your system diagram, voltage level, equipment list, installation environment, and project requirements. CRESIN will recommend suitable SPD products and protection positions.
Does CRESIN provide wiring diagrams for solutions?
Yes. CRESIN can provide typical wiring diagrams and application guidance for different surge protection scenarios.
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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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