Metal-enclosed Medium Voltage Switchgear

Standards GB3906 A.C. metal-enclosed switchgear for rated voltages above3 kV and up to and including35 kV IEC298 A.C. metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV Service condition 1. Ambient temperature: -15'C +40'C 2. Altitude: <=1000m 3. Air humidity: daily average of Air humidity<=95%, daily average of partial vapor pressure <= 2.2kPa; monthly average of Air humidity<=90%,monthly average of partial vapor pressure <= 1.8kPa 4. Earthquake intensity <= 8 degree 5. No corrosive or flammable gas Special condition subject to users Features and Benefits 1. 3to 35kV rated maximum voltage. 2. Easy-to-read controls and indicators, an easily inspected primary disconnect, contact erosion indicator and precisely tooled breaker mechanisms. A lower compartment roll-in breaker is available for indoor or walk-in outdoor switchgear. 3. Simplified maintenance and training. For example, all breakers are the same size, and most frame parts, primary conductors, disconnects and mechanisms are interchangeable. 4. The main bus compartment is completely isolated by 11 gauge metal barriers. Bus bars insulated with high dielectric epoxy pass through trackresistant polyester glass barriers between cubicles. 5. The secondary disconnect combines the contact reliability of a plug with the self-aligning convenience of sliding contacts. 6. Current transformers are located behind mechanically actuated safety shutters and a barrier that isolates the primary disconnect as the breaker is moved into the disconnect position. 7. Voltage transformer trays are automatically grounded on withdrawal, which provides isolation from primary connections. 8. Dry type control power transformers are insulated with molded resin epoxy and mounted in a drawout tray for easy access. 9. Even two-breaker vertical sections offer ample space for terminating up to two 750 MCM cables per phase. 10. ABB, Schneider, GE circuit breaker optional. Rated voltage kV 3.6, 7.2, 12 Rated current A 630 4000 Rated short-circuit breaking current kA 16, 20, 31.5, 40 Rated short-circuit making current (peak) kA 40, 50, 80, 100 Rated peak withstand current kA 40, 50, 80, 100 Rated short time withstand current kA 16, 20, 31.5, 40 Insulation Rated withstand voltage at working frequency (1min) Phase to earth kV 24, 32, 42 Between open contacts kV 24, 32, 48 Rated lightning impulse withstand voltage Phase to earth kV 40, 60, 75 Between open contacts kV 46, 70, 85 rated short-circuit duration s 4 Protection level IP2X Connection type Single bus section, single bus with bypass Operators Electromagnetism, energy storage spring Dimension (W*D*H) mm 1100*1200*2650 Weight kg 1000