Korlen Factory SPD 2P DC SPD Surge Protective Device Surge Protector 1000V Photovoltaic Protector
Technical Specification for Lightning Surge Protection Device (SPD)
1. Feature Definition
The Surge Protection Device (SPD) is a key protective device used in low-voltage AC distribution systems or DC photovoltaic systems to suppress lightning-induced surge voltages and operational overvoltages. It is connected to the system in parallel to discharge the overvoltage energy to the ground, ensuring the insulation safety of the back-end equipment.
2. System Adaptation Requirements
Ac System:
- Applicable to low-voltage distribution networks with grounding forms such as TN-S/TT/IT (e.g. 385/690V).
DC System:
- Specifically designed for photovoltaic arrays (typical voltage levels such as 1000V/1500V DC), it needs to withstand high continuous DC operating voltage (Uc).
3. Installation Location Specification
AC:
- First-level protection (Type 1/2 SPD) for the main distribution box (at the entrance end)
- Second-level protection (Type 2 SPD) of the sub-distribution cabinet.
DC:
- Photovoltaic string output end (close to the solar panel)
- Inverter DC input side (needs to match the polarity of the photovoltaic system).
4. Protection Coordination Requirements
Breaking device:
- Fuses or circuit breakers (such as gPV type fuses) must be connected In series, and the rated current should be 1.25 times higher than the nominal discharge current (In) of the SPD;
- The DC system requires the use of dedicated DC circuit breakers (such as DC1000V 63A).
Earthing connection:
- The impedance of the discharge path is ≤0.1Ω (it is recommended to directly connect a 16mm² copper cable to the ground).
| Poles |
2P |
2P |
3P |
3P |
| Uc (V) |
DC.600 |
DC.1000 |
DC.1000 |
DC.1500 |
| U1mA (V) |
750 |
1500 |
750 |
1100 |
| Imax(8/20μs)(kA) |
40 |
| In (kA) |
20 |
| Up (kV) |
≤2.8 |
≤4.0 |
≤4.0 |
≤5.2 |
| Response time (ns) |
≤25 |
| Maximum backup fuse |
125AgL/gG |
| Operating temperature (°C) |
-40~+70; Relative humidity<95% |
| Cross section of connecting wire (mm²) |
1.5-25mm² |
| For mounting on |
DIN35 |
| Housing characteristics |
Flammability UL94 V-0 and Glow wiammability index 960°C |
| Ingress protection |
IP20 |
| Number of ports |
one-port |
| Pole width (mm) |
18 |
1. Protection Capability
Surge Suppression
- Cope with internal and external surge, lightning and other external surge or internal switch operation surge, such as lightning to reduce thousands of volts surge to the equipment safety range, protect computers and other equipment.
Voltage Clamp
- Precise clamping of overvoltage, such as over 275V (common standard) stable at around 275V, to prevent equipment damage.
2. Quality and reliability
High Quality Components
- High quality components such as varistor (normal high resistance, surge low resistance discharge) and gas discharge tube (high voltage conduction surge current into the ground) are used to ensure stable performance and long life.
Observe Technical Process
- From welding to packaging, all aspects of strict quality control, welding to ensure that the solder joint is firm without virtual welding, to avoid bad contact during surge.
Flame-retardant Housing
- The shell has high strength, flame retardant and corrosion resistance, which protects the internal components from humidity and other environmental effects, and plays a protective role in case of accidents.
3. Performance and function
High Energy Absorption
- High energy absorption capacity, can withstand large energy surges, in frequent lightning areas or industrial environments (such as large factory motor start and stop surge) can effectively protect equipment.
High Responsiveness
- Nanosecond response, the wave now quickly activates the protection mechanism to reduce the impact on the equipment.
Status Display
- There may be an indicator to show the status. The green indicator is normal, and the red indicator may indicate protection action or fault, which is convenient for maintenance.
4. Installation and Use
Install Automation
- Standard interfaces, such as rail or screw fixation, easy installation of distribution boxes or cabinets, easy installation of new or modified systems.
Generally Applicable
- Suitable for home, commercial, industrial and other electrical systems, to protect all kinds of low power to high power electrical equipment.
Q1: Are you a trading company or a manufacturer?
We are Integration of industry and trade, our company has a history of 40 years. We have been specializing in the production of a series of photovoltaic electrical products, such as circuit breaker, pv combiner boxes, pv connector, surge protector, pv fuses, pv tool accessories and etc.
Q2: If OEM is acceptable?
We can provide OEM and ODM services. We have many different specifications and appearances for customers to choose.
Q3: Do you provide sample? Free or charge?
We can provide free samples to customers, but only one piece, but customers need to bear the freight. For some special products, we also offer free samples. Considering their particularity, we usually refund the sample fees to customers after they place formal orders.
Q4: How long is your delivery time?
Our delivery time is determined according to the purchase quantity. Generally, it is about 3-40 days, less than 300 pieces within 5 days, 300-2000 pieces within 7-15 days, 2000-20000 only within 15-40 days.
Q5: What are the current and voltage ratings?
The rated current and voltage of Korlen photovoltaic connectors vary according to the specific model. The rated current of the standard type is 20A-50A (some models can reach 60A), and the rated voltage meets the 1000V-1500V photovoltaic DC voltage range, which is suitable for different photovoltaic power stations.
Q6: How to ensure low contact resistance?
Korlen photovoltaic connector contact is made of high quality copper and silver plated, good electrical conductivity and low resistivity; The manufacturing process strictly controls the processing accuracy of the contact, and professional equipment is used for assembly to ensure tight contact and reduce contact resistance.
Q7: Does it have a leakage protection function?
Yes, Korlen PV connectors is leak-proof. The insulation part is made of high-performance engineering plastics with high insulation resistance; The structure is well sealed to prevent water vapor and dust from entering; There is strict leakage detection in production.
Q8: How is the firmness of the connection guaranteed?
Korlen PV connectors feature a reliable locking design (e.g. double locking); In terms of materials, the shell and connecting parts are made of high-strength, wear-resistant materials; Strict fastness testing in production.
Q9: How to ensure the reliability of the product?
Korlen PV connectors select high-quality suppliers in the procurement of raw materials, the production follows a strict quality management system, each process testing, as well as a variety of reliability tests, and has perfect after-sales service.
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