DC Surge Protector (SPD)Manufacturer
DC SPD for PV solar Panel Inverter
DC surge protectors are designed to protect electronic devices from overvoltage damage, improve system stability and reliability, and reduce economic losses caused by downtime.
Leikexing Electric is a professional manufacturer of surge protectors, specializing in the production of high-quality surge protectors (SPDs).
Leikexing Electric has 8 years of experience in the production of surge protectors, with an annual output of nearly 1 million surge protectors (SPDs).
Type 2 DC Surge Protector (SPD)
Leikexing series DC SPD for PV solar Panel Inverter
DC surge protectors are mainly used to protect devices that require stable DC power supply, avoiding sudden voltage surges that affect their normal operation.
Type 2 DC Surge Protector (SPD)
Leikexing series type 2 DC solar surge protector
The key parameters of Type 2 surge protector include: surge current, maximum continuous operating voltage Dc, voltage protection level Up, and response time tA. These parameters are crucial for evaluating and selecting the performance of surge protectors.
Specification parameters:
◆ Type 2/T2/Class C
◆ Max. continuous operating voltage Ucpv: 500V 600V 800V 1000V 1200V 1500V
◆ Nominal discharge current (8/20 μs) In = 20KA Type 2
◆ Impulse discharge current (8/20 μs) Imax = 40KA Type 2
◆ Protective elements: Metal Oxide Varistor (MOV), Gas Discharge Tube (GDT)
Dimensions＆installation
Leikexing series type 2 PV solar DC surge protector
Type 1+2 DC Surge Protector (SPD)
Leikexing series DC SPD for PV solar Panel Inverter
DC surge protectors are mainly used to protect devices that require stable DC power supply, avoiding sudden voltage surges that affect their normal operation.
Type 1+2 DC Surge Protector (SPD)
Leikexing series DC SPD for PV solar Panel Inverter
The 1+2 surge protector combines the advantages of discharge gap and voltage limiting components. They are usually composed of discharge gaps and MOV components connected in series, which have both the high flux characteristics of discharge gaps and the low residual voltage characteristics of MOVs.
Specification parameters:
◆ Type 1+2/T1+T2/Class B+Class C
◆ Max. continuous operating voltage Ucpv: 500V 600V 800V 1000V 1200V 1500V
◆ Impulse discharge current (10/350 μs) Iimp = 6.25kA Type 1
◆ Nominal discharge current (8/20 μs) In = 20KA Type 2
◆ Impulse discharge current (8/20 μs) Imax = 40KA Type 2
◆ Protective elements: Metal Oxide Varistor (MOV), Gas Discharge Tube (GDT)
Dimensions＆installation
Leikexing series type 1+2 PV solar DC surge protector
Introduction to Photovoltaic DC Surge Protector
Photovoltaic DC surge protector is an electronic device specifically designed to protect the DC side equipment of photovoltaic systems, aimed at preventing damage to equipment caused by overvoltage and overcurrent caused by lightning and other power source abnormalities. Its working principle is to use metal oxide varistors (MOVs) or other voltage clamping devices. When the voltage in the circuit exceeds its rated value, it will switch its state from high impedance to low impedance, guiding the excess current to ground, thereby reducing the voltage in the circuit and protecting the safety of the equipment.
The main functions of photovoltaic DC surge protectors include:
◆ Prevent overvoltage and overcurrent: By absorbing and releasing transient overvoltage, reduce it to a range that the equipment can withstand, and protect the equipment from damage.
◆ Self protection and fault indication: When the protective device ages or is damaged, it can disconnect from the circuit in a timely manner and notify the user to replace it through visual or remote signals.
◆ The application scenarios of photovoltaic DC surge protectors include:
◆ Photovoltaic module: protects photovoltaic panels from lightning and other abnormal power sources.
◆ Combiner box: Ensure that the equipment in the combiner box is not damaged during lightning or power supply abnormalities.
Inverter: Protect the inverter from transient overvoltage impact and ensure its normal operation.
◆ Controller and battery: protect the control system and energy storage equipment from damage caused by overvoltage and overcurrent.
Technical parameters and characteristics of photovoltaic DC surge protector:
◆ Working voltage: usually designed to adapt to the DC voltage of photovoltaic systems, such as 1500Vdc.
◆ Response speed: Fast response, able to conduct and divert in a very short time, avoiding damage to equipment caused by surges.
◆ Modular design: easy to install and maintain, supports remote alarm contacts, achieves remote working voltage indication and failure alarm.
The function of photovoltaic DC surge protector
The main function of a photovoltaic DC surge protector is to protect the DC side equipment in the photovoltaic system from damage caused by overvoltage and overcurrent.
Photovoltaic DC surge protectors are suitable for photovoltaic systems, especially for installing surge protectors at important locations such as solar panel output terminals, combiner boxes, distribution cabinets, and inverter terminals to limit lightning surge overvoltage, ensure safe operation of equipment, and extend service life.
working principle
Photovoltaic DC surge protectors absorb and clamp overvoltage through nonlinear components such as varistors, gas discharge tubes, etc. When the system voltage is normal, the surge protector is in a high resistance state, which does not affect the normal operation of the system; When transient overvoltage occurs, the nonlinear components of the surge protector will quickly respond and enter a low resistance state, discharging the overvoltage to ground and protecting electrical equipment.
Applicable scenarios
Photovoltaic DC surge protectors are particularly suitable for DC side equipment in photovoltaic systems, such as solar panels, combiner boxes, distribution cabinets, and inverters. By installing surge protectors in these critical areas, it is possible to effectively prevent overvoltage and overcurrent caused by lightning and power anomalies, ensuring the normal operation of equipment and extending its service life.
Maintenance of photovoltaic DC surge protector
1. Regular inspection: Check the appearance of the surge protector for cracks, deformation, or other physical damage, inspect the wiring parts for integrity, confirm that the cable joints and wiring terminals are not oxidized, check that the grounding wire is secure, and confirm that the installation surface is clean and free of dust, oil stains, and other dirt.
2. Cleaning: Regularly clean the casing and wiring parts of the surge protector, wipe them with a clean, dry cloth, and gently wipe the installation surface with an eraser to remove dust, oil stains, and other dirt.
3. Replacement: When serious damage is found on the appearance of the surge protector, it needs to be replaced. Meanwhile, if the surge protector’s effectiveness in protecting the equipment deteriorates or fails, it also needs to be replaced. Generally, it is recommended to replace it after three years of use.
4. Repair: If the surge protector malfunctions, it should be immediately stopped and the cause of the malfunction should be investigated. If the cause of the malfunction is obvious, such as damage to the components, they can be replaced directly. If the cause of the malfunction is not obvious, it is necessary to contact the manufacturer for repair or replacement.