Our medium voltage arresters are used to protect medium voltage networks and equipment from overvoltages caused by lightning and switching surges. The selection of arresters depends on the neutral point treatment of the networks. The medium voltage arresters are covered with HTV silicone tube and shielded according to the requirement.
Depending on your requirement, our surge arresters can be used for indoor or outdoor application.
Specially developed indoor arresters are particularly suitable for protecting transformers, switchgear and cable terminations in enclosed spaces. The arresters are available with different connections and can be customized in length. Surge arresters with plastic-insulated cable for connection to SF6 equipment are also available on request.
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The first medium voltage arresters were produced in 1962. The housing of these valve arresters was generally made of porcelain. Since 1996, our medium-voltage arresters have been manufactured only in the lightweight and cost-effective silicone housing; they have successfully passed the 5000 h test. Different creepage path variants and an extensive range of connections and accessories allow customer-specific solutions – contact us!
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Direct silicone injection prevents the formation of air bubbles, which can lead to internal partial discharge in the arrester.
Due to the versatile configuration options, there are almost no limits to the adaptation to their needs.
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When it comes to details…
| Product | SBK-0 | SBK-0 isol. Kabel | |
|---|---|---|---|
| Highest System Voltage Us | kV | 52 | 52 |
| max. Rated Voltage Ur | kV | 51 | 51 |
| max. Nominal Discharge Current In (at 8/20 µs waveshape) | kA | 10 | 10 |
| max. Thermal Energy Absorption Capability kJ per kV of Ur | 2,8 | 2,8 | |
| max. Line Discharge Class | 1 | 1 | |
| High Current Withstand Strength 4/10 µs | kA | 100 | 100 |
| max. low Current Withstand Strength 2 ms | A | 250 | 250 |
| max. Short Circuit / Pressure Relief Capability kA – 0,2s | kA | 20 | 20 |
| Mechanical Strength: Specific short-term load SSL | Nm | 230 | 230 |
| Product | SBK LDC1 | SBK LDC2 | |
|---|---|---|---|
| Highest System Voltage Us | kV | 72 | 72 |
| max. Rated Voltage Ur | kV | 60 | 60 |
| max. Nominal Discharge Current In (at 8/20 µs waveshape) | kA | 10 | 10 |
| max. Thermal Energy Absorption Capability kJ per kV of Ur | 4,5 | 4,5 | |
| max. Line Discharge Class | 1 | 2 | |
| High Current Withstand Strength 4/10 µs | kA | 100 | 100 |
| max. low Current Withstand Strength 2 ms | A | 500 | 500 |
| max. Short Circuit / Pressure Relief Capability kA – 0,2s | kA | 20 | 20 |
| Mechanical Strength: Specific short-term load SSL | Nm | 230 | 230 |
| Rated voltage Ur: | 3 to 60 | kV |
| Arrester class: | distribution | DH |
| Nominal discharge current: | 10 | kA |
| Repetitive charge transfer rating Qrs: | 0,4 | C |
| Thermal energy rating Qth: | 1,1 | C |
| Line discharge class: | 1 | |
| High current impulse (4/10µs): | 100 | kA |
| Rated short-circuit current: | 63 | kA |
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