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Medium-voltage surge arrester 3EJ

medium-voltage surge arrester
medium-voltage surge arrester
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Characteristics

Other characteristics
medium-voltage
Current

10 A, 20 A

Voltage

Min.: 0 V

Max.: 73 V

Description

Siemens 3EJ silicone surge arresters with cage design are ideally suited for reliable protection against overvoltages in medium-voltage distribution networks. Siemens 3EJ cage design surge arresters are ideally suited to provide reliable protection for: •Generators •Motors •Arc furnaces •Dry-type transformers •Airfield lighting systems •Cable sheathing •Capacitors and capacitor banks •Converters for drives The cage, made of fiberglass-reinforced plastic (FRP) rods, provides a rigid, reinforced structure ensuring high mechanical strength. The silicone rubber housing is directly molded onto the metal oxide (MO) blocks and the surrounding cage made of FRP rods. This creates a reliable seal that prevents moisture ingress and partial discharges. The MO resistors are not surrounded by a rigid mechanical coating, which is why no critical increases in pressure can occur in the surge arrester in the extremely rare event of an overload. The arc can escape directly through the soft silicone housing without damaging the mechanical structure. No internal parts are ejected in the process. The innovative Siemens cage design is very secure. The silicone rubber is highly hydrophobic. This keeps any conductive moisture from forming on the surface, and dirt deposits are rendered harmless as a result of the hydrophobic transfer. Silicone is highly fire-retardant and self-extinguishing in the event of fire. These properties ensure the reliable, maintenance-free operation of 3EJ surge arresters.

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.