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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-I Type Surge Protection Device Description
The SKD-I series meets the requirements of IEC61643-1 for level 1 surge protectors, and when used with post-stage pressure-limiting lightning protectors, the two-stage lightning protectors can be installed together. Due to the unique sealed design structure, there will be no leakage arc even when it is in motion.
SKD-I, with its characteristic of low protection level, ensures easier use in conjunction with downstream surge protectors. This surge protector, with its high current-carrying capacity, is used in TT, TN-S systems.
Performance characteristics and installation methods
The energy absorption ability is large (10/350μS) 15KA, and the limiting voltage is low;
Fast response speed (≤25ns);
effectively cut off freeflow;
35mm standard rail mounting;
This product is a one-port indoor fixed installation SPD, the product is designed according to the current national standards such as GB50057-2010 and GB18802.1; It has the advantages of large impulse current (limp: 15KA) and low residual voltage (Up: 2.5KV), and the product uses high-energy components so it can be used in the first level lightning protection place with particularly high arc extinguishing and intermittent current.
The product is installed at the junction of LPZ0A or LPZ0B and LPZ1 zones, or at the main distribution box (cabinet) where the power supply is introduced, and is installed with 35mm standard rails. The connecting rail is made of 6-35mm² multi-strand copper flexible wire.
The grounding wire should be a two-color conductor of more than 16mm², and the length should not be greater than 500mm.
In order to prevent the surge protector from affecting the normal operation of the power grid after failure, the protector connected to the L line should be connected to a fuse or circuit breaker in series.
Technical Parameters
Model | SKD-I-15 | SKD-I-25 | SKD-I-50 |
Maximum continuous working voltage | 385V | ||
Surge protector class | class I | ||
Lightning Protection Zone (LPZ) | 0→2 | ||
Voltage Protection Level (Up) | ≤2.5KV | ≤2.0KV | |
Response time | <25ns | <100ns | |
Test basis | GB18802.1、IEC61643-1 | ||
Impulse discharge current (10/350 μs) Iimp | 15KA | 25KA | 50KA |
Temperature range | （-40℃~+85℃） | ||
Installation | 35mm standard DIN rail | ||
Electric Parameter Table
Q 1: Surge Protector Selection
Q: How can I select an appropriate SKD 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.
