Overview
The Surge Protective Device (hereinafter referred to as the protector) is suitable for AC 50/60Hz power systems with a rated voltage of 380V and below, including TT, IT, TN-S, TN-C, and TN-C-S earthing systems. It is designed to protect electrical networks from lightning strikes and surge overvoltages.
Model Selection Guide
QK – A □ / 4P
- QK – Company Code
- A – Product Code (Surge Protective Device)
- □ – Maximum Discharge Current: 12.5kA / 15kA
- 4P – Number of Poles: 1P, 2P, 3P, 4P
Technical Specifications
| Parameter | QK-A12.5 | QK-A15 | QK-A25 |
|---|---|---|---|
| Rated Operating Voltage (Ue) | 220V / 50Hz | 220V / 50Hz | 220V / 50Hz |
| Maximum Continuous Operating Voltage (Uc) | L-N: 350V N-PE: 255V / 50Hz | 385V / 50Hz | 385V / 50Hz |
| Impulse Discharge Current (10/350µs) (Iimp) | 12.5kA | 15kA | 25kA |
| Nominal Discharge Current (8/20µs) (In) | 12.5kA | 15kA | 25kA |
| Voltage Protection Level (Up) | 1.5kV | 2.5kV | 2.5kV |
| Short-Circuit Current Withstand Capability | ≤ 300A | ≤ 300A | ≤ 300A |
| Operating Temperature | -40°C ~ +80°C | -40°C ~ +80°C | -40°C ~ +80°C |
| Housing Material | Insulating Material: PBT / PA66 | Insulating Material: PBT / PA66 | Insulating Material: PBT / PA66 |
| Protection Degree | IP20 | IP20 | IP20 |
| Status Indicator | Normal: Green Failure: Red | Normal: Green Failure: Red | Normal: Green Failure: Red |
| Recommended Backup Fuse | 125A | 125A | 125A |
| Mounting Method | 35mm Standard DIN Rail | 35mm Standard DIN Rail | 35mm Standard DIN Rail |
Ordering Information
Orders should be placed according to the model selection guide.
Example:
Product Name: Surge Protective Device
Model & Specification: QK-A□
Maximum Discharge Current: 25kA
Number of Poles: 4P
Order Quantity: 100 units
The correct order description should be:
Surge Protective Device – QK-A□ / 4P
Quantity: 100 units