Description
9229 9947 176 0C
15
2013-03-28
Description
Design
The 3AH47 vacuum circuit-breakers differ in their outer design:
• One-pole with two vacuum interrupters arranged one above the other
• One-pole with a vacuum interrupter
• Two-pole with one vacuum interrupter per pole
The basic design as well as the operating mechanisms are the same for all types of
construction.
Vacuum circuit-breaker
The 3AH47 vacuum circuit-breaker consists of
• the mechanism box (60.),
• the pole assembly (19.) with vacuum interrupter (30.),
• the cast resin post insulators (16.1 and 16.2) with reinforcing struts (28.)
• the insulating operating rods (48.) with contact pressure springs (49.) required
for contact actuation.
Each pole assembly (19.) is carried by the cast resin post insulators (16.1 and 16.2)
that are screwed to the pole plate (15.).
Fig. 16
Side view
15.
Pole plate
30.
Vacuum interrupter
16.1
Upper post insulator
48.
Insulating operating rod
16.2
Lower post insulator
49.
Contact pressure spring
19.
Pole assembly, complete
60.
Mechanism box
28.
Strut