LW58A-550 SF6 tank circuit breaker

Product Overview:

LW58A-550 tank circuit breaker products are composed of inlet and outlet line bushing, current transformer, arc extinguishing chamber, frame, operating mechanism and other components, products can be used to cut off rated current, fault current or conversion line, to achieve the control and protection of power system, widely used in domestic and overseas electric power, metallurgy, mining, transportation and public utilities and other industries.

Main parameters:

1. Rated voltage: 550 kV;

2. Rated frequency: 50 Hz/60Hz;

3. Rated current: 4000A/5000A;

4. Rated power frequency 1min withstand voltage: isolation fracture between: (740+315) kV; Relative, phase to phase: 740 kV;

5. Peak rated lightning impulse withstand voltage (1.2/50μs) :

Isolated fracture: (1675+450) kV;

Relative to each other: 1675 kV;

6. Rated short-circuit breaking current: 63 kA;

7. Rated short-circuit closing current: 171 kA;

8. Rated short-time withstand current and duration: 63kA / 3s;

9. Rated peak withstand current: 171kA;

10. The auxiliary and control circuit short-time power frequency withstand voltage (1min) : 2 kV;

11. Radio interference voltage: ≦ 500μV, and no visible corona on sunny nights;

12. Noise level: 1.5m above the ground, 2m from the horizontal distance of GIS outer vertical plane: Noise ≦90 dB;

13.SF6 rated gas pressure (20℃ gauge pressure) :