Your Premier DC Surge Protector Manufacturer

 

ZJBENY is a trusted manufacturer of protective components for photovoltaic systems across the globe. Through our focus on solar DC protection design, production, and marketing, we can bring brand-building PV protection solutions.
In recent years, ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.

  • Why Choose Us?

Rich Experience

Our experience of working in the electrical industry for more than 30 years allows us to create solar DC components that comply with the latest DC standards. With the inheritance of 30+ years of experience in the research and production of DC protection products, we are continuously dedicated to the EV charging field.

Broad Market

ZJBENY has attentively invested resources in research on EV-related products, successively manufacturing other types of products, thus reaping wide market popularity across the world.

Wide Product Range

ZJBENY offers a full range of solar PV protection products and EV chargers for different solar PV, battery energy storage, and EV charging system. Our Main Product Lines: EV Charger, Rapid Shutdown Device, Microinverter, PV Combiner Box, DC Isolator Switch, DC Circuit Breaker, DC Fuse Holder, DC Contactor, AC Components, etc.

Leading Service

We independently complete the R&D, production, marketing, sales, and technical support processes. We satisfy your needs with our long warranty, technical support, and other value-added services.

 

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What is DC Surge Protector?

A DC Protector installed at or within equipment such as DC servo mechanisms, fire alarm monitoring systems, security system controls, etc. provides compact, heavy-duty surge suppression. Senses when an overvoltage is occurring and switches from an "open" to a virtual "short" circuit.

 

Advantages of DC Surge Protector 
1. Improved System Performance

When your solar PV system is properly protected against voltage surges, you can expect improved overall performance. This is because the risk of damage to sensitive components is reduced, allowing the system to operate at optimal levels.
There are minimal disruptions and more consistent power output, which leads to better system efficiency and higher ROI. This is important when it comes to solar farms that must maintain high levels of productivity to be profitable.
Solar surge protection devices are also important in smaller solar power systems too, which must power a facility and do so reliably.

2.Enhanced Equipment Safety

As we mentioned earlier, voltage surges can damage or destroy sensitive electronic components in your PV power system. This is not only costly in terms of repairs and replacements, but it can also pose a safety hazard.
In addition to protecting the solar system components such as inverters and solar panels, solar SPD devices guard electrical equipment in a power system including TVs, computers, home appliances, and office equipment.
By using surge protection devices for PV system protection, you can help to ensure the safety of your equipment and avoid the possibility of electrical fires. This is a major requirement in PV systems that are located in areas with severe weather conditions.

3. Longer Equipment Lifespan

Another big SPD benefit is that the devices help to prolong the lifespan of your equipment. Solar panels are designed to withstand a certain level of voltage, but anything beyond that could cause damage.
A sudden spike in voltage – known as a transient voltage – can come from several sources, including lightning strikes, power outages, and faulty wiring.
When that happens, the electrical current can overload and damage sensitive components within your solar panels. This not only reduces the efficiency of your system but also decreases its lifespan. By using an SPD device, you can protect your equipment from transients and extend its lifespan.

4. Cost Savings

Another benefit of surge protection device use is money savings. While the initial cost of investing in SPDs may seem high, it's important to remember that they offer long-term cost savings. This is because they help to prevent damage caused by transients, which can be expensive to repair.
In most cases, the damage caused by a single transient event costs more than the SPD itself.
In the long run, using SPDs can save you money. This is because they help to prevent damage caused by transients, which can be expensive to repair.

5. Enhanced System Reliability

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Features of DC Surge Protector

 

Nominal Voltage (Un)

The nominal voltage stands for the nominal voltage of the system to be protected

Maximum Continuous Operating Voltage (Uc)

The maximum continuous operating voltage is the r.m.s value of the maximum voltage which may be connected to corresponding terminals of the Surge Protective Device during operations.

Maximum Continuous Operating Voltage for PV System (Ucpv)

The maximum continuous operating voltage for Photovoltaic (PC) system is the value of the maximum DC voltage which may be permanently applied to terminals of SPD.

Voltage Protection Level (Up)

The Voltage Protection Level is the maximum instantaneous value of the voltage at terminals of SPD.

Nominal Discharge Current (In)

The nominal discharge current is the peak value of the current that can be passed through SPD having a wave shape of 8/20 µs.

Maximum Discharge Current (Imax)

The maximum discharge current is the peak value of the current which the device can safely discharge through the SPD having a wave shape of 8/20 µs.

 

Types of DC Surge Protector

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Type1

Type 1 SPDs have a 10/350 s current wave and protect against direct lightning strikes. In central inverters, Type 1 SPDs are employed.

 

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Type2

Type 2 SPDs protect indirect lightning strikes with waveforms of 8/20 seconds. An 8/20 s waveform denotes a strike with an 8 s rising time and a 20 s duration to half peak. Type 2 SPDs prevent overvoltage from spreading into electrical installations and devices.

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Type3

Type 3 cables must have a minimum conductor length of 10 meters between the electrical service panel and the site of use.

Installation Guidelines 

 

1

System Design Review: Before installing a DC SPD, review the PV system design and identify critical components that need protection, such as: Inverters, charge controllers and monitoring systems. Determine the appropriate location to install the DC SPD based on your system layout.

2

Compliance with Standards: Make sure the DC SPD you choose complies with relevant standards and certifications for solar surge protector in photovoltaic applications, such as: UL 1449, IEC 61643-31 or EN 50539-11. Compliance with these standards ensures that devices meet safety and performance requirements. Correct grounding:
Proper grounding is essential for effective solar surge protector. Make sure the solar array grounding system complies with local electrical codes and industry standards. The grounding conductor should be properly sized, well connected and routed to the grounding electrode system.

3

Installation of DC SPD at Main Service Entrance: Install a Type 1 DC SPD at the front door of the building to protect the entire electrical system, including the solar array. Connect the DC SPD in parallel with the input power supply. Follow the manufacturer's instructions for proper wiring and connections.

4

Installing a Subdistrict DC SPD: Especially in large photovoltaic systems, Type 2 DC SPDs are installed in sub-distribution boards or collector boxes. These DC SPDs provide local protection for circuits connected to the panel. Connect the DC SPD in parallel in the circuit to ensure proper wiring and alignment with the main service input DC SPD.

5

Device-level DC SPD Installation: Depending on system requirements and device sensitivity, you should consider installing Type 3 DC SPDs in specific device layers such as inverters and charge controllers. These DC SPDs provide an additional layer of protection at the device level. Follow the manufacturer's instructions for proper installation and connection.

6

Bonding and Routing:Ensure proper connections and wiring throughout the PV system. Connect all metal components to create an equipotential bond to minimize potential differences. Use proper wiring practices and wire sizes to handle surge currents and minimize voltage drops.

7

Regular Maintenance and Inspection:Regularly check and maintain the installed DC SPD according to the manufacturer's recommendations. This includes visual inspection, testing, and replacement if necessary. Regular maintenance helps ensure the long-term effectiveness of your photovoltaic system's overvoltage protection.
We recommend that you consult a qualified solar installer or professional electrician for specific installation guidelines for your solar system and local regulations. By following these guidelines, you can provide robust solar surge protector for your photovoltaic application, protect your equipment, and ensure system reliability.

 

Certifications

 

 

We have the UL1741 mark, certification issued by Underwriters Laboratories, the most important for system interconnection tests in the USA. ZJBENY also holds SAA, CB, CE, TUV, ISO, RoHS certifications.

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Contact US 

                    If you have any enquiry about quotation or cooperation, please feel free to email us at benyi@zjbeny.com, or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.

                    TEL: +86-577-57177008
                    FAX: +86-577-57177007
                    Address: Changjiang Rd, Wenzhou Daqiao Industry Park, Yueqing, Wenzhou, Zhejiang, China, 325603

 

Frequently Asked Questions

Q: What is the difference between AC and DC surge protector?

A: Voltage levels: AC SPDs protect equipment connected to the utility grid with voltages ranging from 120V to 480V. In contrast, DC SPDs are designed for solar PV systems with voltages ranging from a few hundred volts up to 1500V, depending on the system's size and configuration.

Q: How do I choose a DC surge protector?

A: To choose a proper SPD model for the solar/PV system, the following points should be kept in mind: lightning round flash density;
system's operating temperature;
system's voltage;
system's short circuit current rating;
level of the waveform that is to be protected against.
nominal discharge current.

Q: What is a DC protector?

A: They provide cell sites needed protection from electrical overvoltage damage caused by lightning strikes. Our photovoltaic and eMobility protection solutions are thoroughly tested to international standards and are suitable for use in both AC and DC power environments.

Q: What are the disadvantages of surge protector?

A: Not all surge protectors can handle higher voltages. Basic ones can handle slight fluctuations. Too much exposure to high voltages may cause the surge protector to fail. Higher voltage surge protectors are available but may be more expensive.

Q: How does a DC SPD work?

A: 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.

Q: Can you use a AC surge protector for DC?

A: It is dangerous to use a surge protector meant for AC on the DC side and vice versa. Surge protectors must also be used on the AC side if they are being used on the DC side. For AC, it's equally vital to ensure the surge protector is designed specifically for the AC side.

Q: Does it matter what surge protector you get?

A: The joule rating refers to how much energy your surge protector can absorb. In this case, a higher rating equals better protection. A surge protector with a rating or 1,000 joules will last longer than a surge protector with a rating of 500 joules.

Q: Do solar inverters have surge protection?

A: Solar panel installations require surge protection to protect costly inverters that can fail during lightning storms.

Q: Is it OK to leave surge protector on all the time?

A: This critical safety measure is designed to shield your electronics and reduce the risk of fire. Use power strips sparingly. Power strips are not designed to maintain a load for extended periods of time.

Q: Do cheap surge protectors work?

A: Surge protectors, at least the cheap kind, are basically RC tank circuits that take voltage spikes, and make them (under ideal circumstances) disappear. Higher prices generally mean higher capacities and warranties attached to the parts (though it could also mean active power factor correction and microcontrollers).

Q: Which is safer power strip or surge protector?

A: If there's a surge, then your expensive TV can get fried and destroyed. A power strip does nothing besides give you extra sockets to plug into and an easy on/off switch. If you want any protection at all, you need a surge protector.

Q: What is the difference between Type 1 and Type 2 surge protection?

A: Type 1 & 2 surge arresters are installed directly under the incoming breaker. We use Type 1 when there is a lightning bolt installed on the building roof. When there's not, we use Type 2. Type 3 is installed in parallel with the sensitive loads (Computers, printers...etc. )

Q: What is the difference between Type 2 and Type 3 surge protectors?

A: Technologically speaking, type 3 surge protection is similar to type 2, which is based on varistors, but the requirements concerning discharge capacity are even lower compared to type 2. Type 2/3 surge protection is provided above all on cables that lead into a building from the outside.

Q: How do you connect a surge protector to an inverter?

A: To connect a surge protector to an inverter that has an integrated fuse box, ensure that you bypass the internal fuses and connect to external string fuses. Surge protectors should be installed outside the inverter, and if used outdoors, should be housed in a NEMA Type-3R or higher-rated enclosure.

Q: Is surge protection required for solar?

A: Yes, Surge protection is a small part of an overall solar panel array installation; yet, it is an integral component that can't be ignored. Like every other electrical device out there, solar panels are prone to sudden voltages increases that can damage their internal components.

Q: Do I need a power conditioner or surge protector?

A: The difference between the two is far more than just the price point between the two. As we will go more in detail, surge protectors can provide only basic protection whereas a power conditioner provides full protection for electronic equipment.

Q: What is Type 1 and Type 2 SPD?

A: Type 1 SPD is characterized by a 10/350 µs current wave. Type 2 SPD. The Type 2 SPD is the main protection system for all low voltage electrical installations. Installed in each electrical switchboard, it prevents the spread of overvoltage in the electrical installations and protects the loads.

Q: Why buy an expensive surge protector?

A: Surge protectors are also modest in price, so if you are looking for a way to protect your television, computer, and home entertainment system, these are great options. You can usually find these for under $20, but more expensive options offer protection up to a higher amount of joules.

Q: Should a TV be plugged into a surge protector?

A: Yes, the most important products to plug into a surge protector are expensive electronic devices with microprocessors. Desktop computers, laptops, televisions, gaming systems, and charging phones should all be plugged into a surge protector, so they aren't damaged in a storm.

Q: Is 500 joules a good surge protector?

A: For small devices, like lamps and clocks, a surge protector with a joules rating of around 500 will be sufficient. However, if you intend to plug in higher-powered devices like laptops and cell phones, you will want a joules rating of at least 1,000.

 

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