CTB Operating Mechanism for Outdoor High Voltage Circuit Breaker (Manually Operation)

1. Overview

1.1 Model No & Name

CTB spring operating mechanism have two types, manual type opera

ting mechanism and motor type operating mechanism.

1.2 Its main functions and working conditions

This operating mechanism will be used in ZW32-12 outdoor high voltage vacuum circuit breaker ( designed by Beijing Electrical Science Academy ) and other power nearby outdoor or indoor high voltage vacuum circuit breaker, its performances can meet requires of GB1984<AC High Voltage Circuit Breaker> and the product’s < Technical Conditions>; Manual type operating mechanism holds functions of manual energy-storage,manual closing/opening,overcurrent protection . Motor type operating mechanism functions including motor or manual energy-storage,electromagnet or manual closing/opening,overcurrent protection ,etc. . The control device of over-current release protection is with following function: surge current, time delay, and quick breaking, this product is suitable under following working conditions:

A. Surrounding air temperature up limit is +40℃,down limit is -45℃.

B. Elevation is not higher than 2000m, wind speed not over 35m/s.

C. Related humidity, day average is not over 95%, month average is not 90% (+25℃).
Water vapor pressure, day average is not over 2.2X103Mpa,month average is not over 1.8X103MPa.

D. The using venue should be no fire accident, explosion danger, serious dirtiness and severe shake.

1.3 Operating mechanism’s weight: 8.6kg.

2. Structure and working principle

2.1 CTB operating mechanism (manual type)’s structure is as Pic1

1. Installing Column 2. Pinion Gear 3. Energy Storing Axis 4. Large Gear

5. Closing Half Shaft 6. Output Crankarm 7. Supporting Column 8. Breaking Click

9. Breaking Half Shaft 10. Overcurrent Coil 11. Energy Storing Crankarm 12. Energy Storing Spring

13. Cam 14. Main Axis 15. Wheel 16. Clutch Plate