Description; Design - Siemens 3AH3 Operating Instructions Manual

Description

Vacuum circuit-breaker
Siemens Parts
9229 9860 176 0E
2013-08-22

Design

The 3AH3 vacuum circuit-breaker consists of
• the mechanism box (60.),
• the 3 pole assemblies (19.) with vacuum interrupters (30.),
• the cast resin post insulators (16.1 and 16.2) with reinforcing struts (28.) and
• the insulating operating rods (48.) with contact pressure springs (49.) required
for contact actuation.
Each of the 3 pole assemblies (19.) is carried by the cast resin post insulators (16.1
and 16.2) that are screwed to the pole plate (15.).
Fig. 22 Side view
15. Pole plate
16.1 Upper post insulator
16.2 Lower post insulator
19. Pole assembly, complete
28. Strut
30. Interrupter
48. Insulating operating rods
49. Contact pressure spring
60. Mechanism box
Description
19