Surge arrester for power distributionSurge protective devices (ZL-DN, ZL-DQ)
Built-in type surge protective devices for 6kV distribution switches and transformers
Product Features
These surge protective devices are surge arresters to be mounted inside switches and transformers. These devices are directly connected across the part to be protected, and therefore the protective performance is very high. These devices are very compact as they are mounted inside the equipment and there is no risk of contamination. These features have been only realized with highly reliable Meidensha zinc oxide blocks.
- Excellent protective performance
- Zinc oxide blocks can be used in oil and SF6 gas as well as sealed-air
- Highly reliable zinc oxide blocks
- Very compact and easy to handle
Applications and Solutions
These surge protective devices are surge arresters to be mounted inside switches and transformers.
Specifications of the surge protective device for switches
| Type | ZL-DN | |
|---|---|---|
| Rated voltage | 8.4kV | |
| Nominal discharge current | 2.5kA | |
| Critical operating voltage | 17 kV or higher (95°C) | |
| Rated discharge withstand current | Lightning impuIse (4/10 µs) | Twice at 30 kA |
| Square-wave (2 ms) | 20 times at 75 A | |
- *Various surge protective devices available for different applications, including air-switches and SF6-gas switches.
Specifications of the surge protective device for transformers
| Type | ZL-DQ | |
|---|---|---|
| Rated voltage | 8.4kV | |
| Nominal discharge current | 2.5kA | |
| Critical operating voltage | 17 kV or higher(120°C) | |
| Rated discharge withstand current | Lightning impulse (4/10 µs) | Twice at 30 kA |
| Square-wave (2 ms) | 20 times at 75 A | |