Description
1.Brief Introduction
33KV/72/5KV/110KV/132
KV Outdoor H.V. A.C. Dead Tank SF6 gas circuit breaker is a new kind of circuit breaker with self-blast interrupter and spring operating mechanism,he latest achieve-arc extinguishing principle of gas-blast pressure and breaking-current self-adapting are employed, by which most of energy required for breaking rated short-circuit current are acquired from arc itself. Therefore, the demand for operating energy is reduced significantly. The interrupter is placed inside a metal enclosure. The circuit breaker can be mechani-cally three-phase gange-operated. Both remote electrical control and local manual control can be realized. Type CT20-II spring operating mechanism, provided with the product, is a kind of mechanism with low operating power, minimum maintenance work needed and high reliability.
2.Environmental Condition
2.1.Altitude above sea level 4500m
2.2.Relative humanity monthly 90%
2.3.Max .wind velocity 35m/s
2.4.Pollution class IV class
2.5.Ambient temperature -35 ~40 (Product of 72.5kV may be operated at -40 )
2.6.Max .temperature difference daily: 25K
2.7.Earthquake withstand density 9 degree
2.8.Icing thickness: 10mm
2.9.Max. radiance from sun: 1000 W/m2
Note: when product is used under the condition out of above range, user and manufacturer shall consult to confirm.
1. Thanks to excellent electrical field design and its perfect coordination with motion characteristic, breaking capacitive current may be up to 630A and guaranteed breaking current of 1200A(70000Kva) without re-strike.
2. Gas-flowing characteristics is so appropriate that its breaking inductive current has no overvoltage at chopped current.
3. Arc-extinguishing principle of gas-blast pressure and breaking current self-adapting.When breaking rated short-circuit current and any other fault current, there are reliable breaking performance and abundant arcing time differential through employing arc-extinguishing principle of gas-blast pressure and breaking current self-adapting.
4. Excellent Insulation Performance.There is wide range of internal insulation margin. For 40.5kV product, which is used at decreased voltage,the insulation level is corresponding to that of 72.5kV.
5. Long-time flow of short-time withstand current.The product may be flowed current of 40kV/31.5kV for 4 seconds.
6. Breaking current of differential phase earthing may be up to 34.8kA/25.2kA.
7. High performance of Earthquake withstand.Due to the optimizing and coordinative design on structure frame, the product has a high performance of seismic-withstand with earthquake density of 9 degree.
8. The product is entirely provided with latest advanced type CT20 spring mechanism. So it has low noise level, high mechanical reliability and mechanical three-phase gang-operation, and smaller space occupied, compared to that of normal single-phase circuit breaker when three-gang operating, specially suitable for city networks and country networks retrofit projects.
9. After all routines test at factory, each circuit breaker is packed completely, with 0.05MPa SF6 gas filled. Maintenance works needed at site are minimized, which only need checking SF6 gas gauge and applying lubricant.
10. The frame is such designed that the products are specially suitable for retrofit projects of replacement of bulk-oil circuit breaker, such as type DW8-35 DW13-35 and DW2-35,etc bulk oil circuit breakers, which do not need to reconstruct foundation. Intermediate frame for type LW24-40.5 SF6 gas dead-tank circuit breaker is specially designed so that the product can be installed directly on original foundation of bulk-oil circuit breaker. Thus the work for retrofit engineering is reduced greatly and project period becomes short.
TECHNICAL GUARANTEED SWI
Complaint
