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Class IEC 2 surge arrester 3EQ series
class IEC 3class IEC 4class IEC 5

class IEC 2 surge arrester
class IEC 2 surge arrester
class IEC 2 surge arrester
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class IEC 2, class IEC 3, class IEC 4, class IEC 5
Other characteristics
electrically isolating, high-voltage, in-line


Main features: •High mechanical stability for support applications and for use in regions with high seismic activity •Extremely reliable pressure relief for use in areas requiring special protection •Excellent pollution layer characteristics for use in coastal and desert regions or in areas with extreme air pollution •All three surge arrester product families feature a superior sealing system that reliably prevents moisture ingress •Decades of trouble-free service •Manufactured using only environmentally compatible materials Siemens 3EQ surge arresters with silicone housing and a composite hollow core design are ideally suited for the reliable protection of: - Transformers - Circuit breakers - Generators - Motors - Capacitors - Bushings - Switchgear The surge arrester with the composite hollow core design uses silicone and fiberglass-reinforced plastic (FRP) as housing materials. The direct molding of the silicone onto the FRP hollow core ensures reliability, while an excellent special sealing of the flanges at both ends of the surge arrester effectively prevents partial discharges and moisture ingress. This guarantees decades of trouble-free operation. The combination of silicone rubber and the fiberglass-reinforced hollow core also allows for outstanding mechanical stability. The surge arrester with the composite hollow core design provides a very high degree of safety: In the event of an overload or the extremely rare case of an arrester short circuit, the arc escapes directly through directional pressure relief devices.


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