GIS surge arrester 3ES1, metal-oxide, metal-enclosed for gas-insulated switchgear — detailed ratings on request

• Official product family in the Surge Arresters product line, Gas Insulated Arresters (3ES/T/Y) group — dedicated to protecting gas-insulated switchgear (GIS) against lightning and switching overvoltages
• Metal-oxide (MO) active part: high resistance at continuous operating voltage, collapsing to low resistance during a surge so the overvoltage is limited to the arrester's residual voltage — no series gaps required
• Enclosed, gas-insulated construction for connection directly at the switchgear, placing overvoltage protection close to the protected GIS equipment
• Part of the Siemens Energy GIS arrester range covering AC/DC system voltages from 72.5 kV up to 800 kV; the same range also includes a clean-air surge arrester and oil-SF6 arresters for transformer protection
• Type-tested arrester portfolio according to IEC and IEEE standards; arrester manufacturing in Berlin, Germany and Wuxi, China since 1925
• Family-specific ratings (Ur, Uc, nominal discharge current In, energy handling, dimensions) available on request