Type 1+2 DC Surge Protective Device

What is a Type 1+2 DC SPD and how is it different from a separate Type 1 or Type 2 device?

The Type 1+2 DC Surge Protective Device is a composite surge protector that combines the protection functions of Type 1 and Type 2. Type 1 devices are designed to protect against high-energy impacts from direct lightning strikes (10/350μs waveform), while Type 2 devices are designed to protect against induced lightning and switching overvoltage (8/20μs waveform). 20μs waveform). Our Type 1+2 DC SPDs address both threats, providing comprehensive protection for PV systems. Compared to installing two separate devices, the composite device saves installation space and costs, simplifies system design, and ensures coordinated protection. As a specialist manufacturer with 10+ years of experience, our composite devices are optimized to ensure the best possible ease of installation without compromising on protection.

How do I determine that my PV system requires Type 1+2 and not just Type 2 DC SPDs?

Determining whether your PV system requires a Type 1+2 DC SPD, primarily depends on the results of a lightning strike risk assessment. A Type 1+2 DC SPD should be considered in the following situations:

The PV system is installed in an exposed location, such as a hilltop or open area.
The installation area is a high risk for lightning strikes.
External lightning protection devices are available nearby the system;
Large-scale PV power plants have extremely high reliability requirements;

Project insurance companies require comprehensive lightning protection. Our engineers can assist you with a professional risk assessment according to IEC 62305 to ensure that your investment is properly protected. Our Type 1+2 products offer higher discharge capacity (up to 50kA) and more comprehensive protection against more than 95% of the world's lightning strikes than simple Type 2 equipment, which is especially important to protect your PV system from catastrophic losses.

What are the key differences between your Type 1+2 DC SPDs and how do they compare to similar products?

Our Type 1+2 DC SPDs stand out due to a number of technical advantages: 1)Patented thermal disconnect technology that automatically disconnects the device when it ages or overloads, preventing the risk of fire; 2)Bi-directional protection design, providing a full range of protection from positive and negative poles to ground and between poles; 3)Pluggable module design, allowing maintenance personnel to quickly replace without disconnecting the entire system; 4)Advanced varistor (MOV)+spark gap composite technology with both low protection voltage and high shock resistance; 5)Integrated RS485 communication interface (optional) to support remote monitoring and early warning; 6)Enhanced UV-proof housing design, adaptable to outdoor environment; 7) Passed the third-party testing and certification by VDE and TÜV, complying with the latest IEC standards. As a manufacturer specializing in SPD production, our products incorporate more than 10 years of industry experience and continuous R&D efforts to ensure the most reliable protection solution for your PV system.

What is the life expectancy of your Type 1+2 DC SPDs? What are the maintenance requirements?

Our Type 1+2 DC SPDs have a design life of over 15 years under standard operating conditions. The products undergo rigorous accelerated aging tests and are capable of withstanding 1,000 rated discharge current (In) shocks with stable performance. Each unit has a clear status indicator window, green for normal operation and red for replacement. We recommend that maintenance personnel perform quarterly visual inspections and additional inspections after the thunderstorm season. Thanks to our pluggable module design, maintenance personnel can replace the unit in less than 5 minutes without disconnecting power to the entire system. With our strong production capacity, we guarantee continuous availability of critical spare parts for 10 years, addressing the concerns of system integrators and end-users about long-term maintenance support.

Can you provide customized Type 1+2 DC SPD solutions for PV systems with different voltage levels?

As a specialized manufacturer, we are able to provide customized Type 1+2 DC SPD solutions for all standard PV system voltage classes from 600V to 1500V DC. While our product line covers common 600V, 1000V and 1500V systems, our engineering team can develop non-standard voltage specifications for special needs. Customization options include:

OEM branding customization and packaging
Specific voltage protection level (Up) adjustment;
Different connection terminal configurations (bolt type, spring type, plug-in type); 4)Adaptation of special installation methods;
Enhanced monitoring functions;
Adaptable design for special environments, such as oceans, deserts, and high altitudes.

Our factory has complete R&D and testing facilities, allowing us to complete small-batch custom development within 4-5 weeks, with a minimum order quantity of 1,000 pieces. We also have a stringent quality control process and comprehensive warranty policy in place to guarantee that our customized products meet the specific requirements of your project requirements.

What are the key considerations when installing Type 1+2 DC SPDs to ensure optimal protection?

Correct installation is critical for optimal Type 1+2 DC SPD protection. Key considerations include:

Installation location - It should be as close as possible to the protected equipment, such as the inlet of the string combiner or the DC side of the inverter; 2)Connection wire - Use the shortest path (no more than 0.5 meters), avoid sharp bends, and a minimum of 6mm² copper wire is recommended; 3)Equipotential connection-SPD grounding end must be reliably connected to the system equipotential coupling terminal, and the grounding resistance should be less than 10 ohm;
Installing direction - strictly in accordance with the product identification of the L+/L -/PE terminal connection, the wrong connection will result in protection failure;
Installation space - reserve enough space for heat dissipation and status indication observation;
Protection level - choose the appropriate external protection measures based on the installation environment. Detailed installation manuals are available, and our technical support team offer 24/7 installation consulting services.

What certification tests have your Type 1+2 DC SPDs passed? Do they meet international standards?

Our Type 1+2 DC SPD product line has passed stringent international certification tests and is fully compliant with major global standards:

IEC 61643-31 - Specific Standard for Surge Protectors for Photovoltaic Systems;
EN 50539-11 - EU Surge Protection Standard for Photovoltaic Applications;
IEC 61643-11 - General Standard for Low Voltage Surge Protection.

All tests are performed by internationally recognized independent laboratories such as TÜV, including maximum discharge current (Imax) test, nominal discharge current (In) test, voltage protection level (Up) verification, temperature stability test and failure mode safety test. Our manufacturing facilities are also certified with ISO 9001:2015 Quality Management System and ISO 14001 Environmental Management System. We keep our certifications up-to-date to ensure that our products meet the latest standards. Complete test reports and certificates are available upon request to help projects pass grid acceptance and insurance assessments.

How can I increase the Return on Investment (ROI) of my PV system with Type 1+2 DC SPDs?

Investing in our Type 1+2 DC SPDs can improve the ROI of a PV system in a number of ways:

Reduced Downtime - Studies have shown that systems with adequate lightning protection can reduce lightning-related downtime by 1-3 days per year, which can avoid approximately $10,000-30,000 in annual power generation losses for a 50MW plant;
Extend equipment life - Effective protection can extend the life of inverters and monitoring systems by 20-30%, reducing the frequency of high-cost component replacements;
Reduced insurance costs - many insurance companies offer a 5-15% discount on premiums for systems with qualified SPDs installed;
Simplify design and installation - our composite products can save 10-20% of the costs associated with installing Type 1 and Type 2 equipment separately;
Safeguard system performance - prevent micro-damage to PV modules caused by lightning strikes and maintain optimal power generation efficiency.

According to our customer feedback, in high thunderstorm areas, the average payback period for investing in our Type 1+2 DC SPDs is only 1-2 years, while the product life can be up to 15 years, providing significant long-term protection value.

How does your company ensure timely delivery and quality consistency for large orders?

As a specialized manufacturer, we have established a strong production system to ensure timely delivery of large orders and consistent quality:

Capacity guarantee - Our 8 production lines have a monthly capacity of 100,000 pieces of DC SPDs, which can support the demand of large-scale projects; 2)Raw Material Reserves - Establishing strategic partnerships with key component suppliers to maintain a 30+ day safety stock of core components; 3)Production planning-implementing advanced ERP systems and lean production methods to optimize production scheduling;
Quality control - implementation of the "triple inspection" system (incoming raw materials, production process, and finished products), 100% testing of each batch of products rather than sampling;
Logistics management - with DHL, UPS and other international logistics companies to establish cooperation, to provide global transportation solutions and real-time tracking;
Project Manager System - Designate exclusive project managers for large orders, providing full tracking services from order to delivery. We have successfully delivered several large-scale projects, including thousands of SPD products for 100MW+ PV power plants, and have maintained an on-time delivery rate of 99.7% and a one-time quality pass rate of 99.8%. These figures prove our ability to meet your large-scale project needs.

What is the process of sourcing Type 1+2 DC SPDs with your company? How long does it take from inquiry to delivery?

The process of purchasing Type 1+2 DC SPDs with us is simple and efficient:

Initial inquiry - Provide us with basic information about your system (voltage level, application scenario, quantity requirement) and our technical team will respond with an initial proposal within 24 hours;
Technical exchange - for specific application requirements for technical discussions, if necessary, provide samples for testing and evaluation;
Formal quotation - provide detailed quotation according to the confirmed technical specifications and quantity, including price, delivery time and transportation mode; 4)Order Confirmation-Sign a sales contract and make a 30% prepayment; 5)Production arrangement - standard products will be completed within 2-3 weeks, customized products will take 4-5 weeks;
Quality inspection - 100% test after production completion and provide test reports;
Delivery arrangement - arrange delivery after payment of balance, provide complete product documentation and tracking information.

Overall Timeline: Standard products usually take 3-4 weeks from inquiry to delivery, large orders or customized products may take 5-6 weeks. Our sales team will follow up on the status of your order and provide regular progress updates to ensure you are kept informed of the progress of your purchase.

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Type 1+2 DC Surge Protective Device

Type 1+2 DC Surge Protective Device Manufacturer

Type 1+2 DC SPD MYH9

Type 1+2 DC SPD MYH6.25

Type 1+2 DC SPD MDH9

Type 1+2 DC SPD MDH6.25

Type 1+2 DC Surge Protective Device Series

Technical Specifications of Our DC Surge Protective Device

FAQ

Last Type 1+2 DC SPD Articles

Get in Touch with Us

Get in Touch

Wenzhou LETOP Electric Co., Ltd.

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