siemens.com/energy Gas-insulated switchgear Type 8DN8, 145 kV, 40 kA, 3150 A A new dimension in compactness economic efficiency high reliability M M long service life safe encapsulation very high degree of gas-tightness low life cycle and maintenance costs easy access and ergonomic design high availability reliable operation even under extreme environmental conditions environment-compatible design Answers for energy. Technical data Switchgear type Rated voltage 8DN8 up to 145 kV Rated frequency 50/60 Hz Rated power frequency withstand voltage (1 min) 275 kV Rated lightning impulse withstand voltage (1.2/50 µs) 650 kV Rated normal current busbar up to 3,150 A Rated normal current feeder up to 3,150 A Rated short-circuit breaking current / break time up to 40 kA / < 3 cycles Rated peak withstand current up to 108 kA Rated short-time withstand current (3 s) up to 40 kA Leakage rate per year and gas compartment ≤ 0.5 % routine test ≤ 0.1 % type test Bay width Bay height, depth 800 mm 2,600 x 4,060 mm depending on bay arrangements Driving mechanism of circuit-breaker stored-energy spring Rated operating sequence O-0.3 s-CO-3 min-CO CO-15 s-CO Rated supply voltage 48–250 V DC Expected lifetime > 50 years Ambient temperature range –30 °C to +40 °C Standards IEC/IEEE/GOST Other values on request Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany Power Transmission Division Dispo 30002, c4bs-Nr. 7460 Order No. E50001-G630-A229-X-4A00 | Printed in Germany | fb 5476 PD 470086 WS 03131.0 | © 03.2013, Siemens AG siemens.com/energy