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Features
- High-quality imported chips with large current-carrying capacity. - One-port design for protection against electric shock. - Equipped with a built-in disconnector. When the SPD fails due to overheating or breakdown, the disconnector can automatically disconnect it from the power grid and provide an indication signal at the same time.
- Hot-swappable design allows for the replacement of the protector unit without power outage.
- The response time of operation is less than 25 nanoseconds.
Civil Commercial Industrial
SKD 2 Type Surge Protection Device Description
The SKD2 modular surge protector is designed for AC 50/60Hz power systems up to 420V, suitable for TN-S, TN-C-S, TT, and IT systems. It offers reliable lightning protection with equipotential bonding. The unit features a built-in disconnection device that automatically cuts off in case of overcurrent, overheating, or failure. A color indicator (green/normal, red/fault) shows operating status, and the module can be easily replaced online.
The SKD2 series products are suitable for Class B lightning protection and are used for equipotential bonding during lightning strikes. They are installed at the interface between LPZ0A or LPZ0B and LPZ1 zones. Models such as SKD2-60, KD2-80, and SKD2-100 are typically installed at the main low-voltage distribution cabinet where underground conduit cables enter.
Model | SKD2-60 | SKD2-80 | SKD2-100 |
Maximum continuous working voltage | 420 | ||
Voltage protection level | ≤2.2 | ≤2.4 | ≤2.5 |
Nominal discharge current | 30KA | 40KA | 60KA |
Maximum discharge current | 60KA | 80KA | 100KA |
Response time | <25 | ||
Test basis | GB18802、IEC61643-1 | ||
Cross-sectional area of connecting wires | 10、16mm² | 16、25mm² | |
Cross-sectional area of the access ground wire | 25mm² | 25、35mm² | |
Circuit breaker or fuse selection | 63A | 63A | |
Lightning protection level | B | ||
Electric Parameter Table
Schematic Diagram of Wiring Method
Q 1: Surge Protector Selection
Q: How can I select an appropriate SKD1 surge protector?
A: Select it according to the required lightning protection level and the environment. For example, choose SKD1 - B for Class B lightning protection, which is used at the junction of LPZOB and LPZ1, etc.; choose SKD1 - C for Class C lightning protection, which is suitable for places like computer centers; choose SKD1 - D for Class D lightning protection, which is used to protect terminal loads. Also, refer to parameters such as the maximum continuous operating voltage.
Q 2: Installation Conditions
Q: What are the key installation conditions for SKD series surge protectors?
A: The operating temperature should be between -20℃ and +45℃, and the 24-hour average should not exceed +35℃. The humidity at +40℃ should not exceed 50% and there should be no condensation. The altitude should be lower than 2000 meters. The environment should be free from strong vibrations, impacts, corrosive gases, and hazardous substances, and the pollution degree should be at Level Ⅲ.
Q 3: Importance of Technical Parameters
Q: Why are technical parameters such as the voltage protection level and discharge current of SKD1 surge protectors important?
A: The voltage protection level limits the over voltage. A lower value indicates better protection. The discharge current (nominal and maximum) reflects the ability to deal with surge currents. A higher value means it can handle strong lightning-induced surges and effectively protect the electrical system.
