Chống Sét Siemens 3EL1, 3EL1, 198kV, 252 KV, 220 KV, Chống Sét ...

• 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 3 EL Cage Design® surge arresters are ideally suited for the reliable protection of:- Transformers- Circuit breakers- Generators- Motors- Capacitors- Traction vehicles- Bushings- Switchgear- Transmission lines

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 and UV-resistant. 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 3EL surge arresters. They are also lightweight, allowing for easy transport and a variety of installation options. 3EL surge arresters are suitable for use as station or line surge arresters.

Maximum values

3EL5

3EL1

3EL2

3EL3

Highest voltage of the system (kV)

72.5

252

420

550

Maximum rated voltage (kV)

60

198

360

444

Nominal discharge current (kA)

Thermal energy rating (kJ) / (kV)

Charge transfer rating (C)

10

4.5

1.0

X

10

5.0

1.2

X

10

6.0

1.6

X

10

7.0

2.0

X

20

9.0

2.4

X

20

10.0

2.8

X

20

14.0

3.6

X

Rated short-circuit current (kA)

20

65

65

65

High current impulse (kA)

100

100

100

100

Specified short-term load SSL (kNm)

0.5

1.2

4.0

10.0