Siemens 3AH - Construction and Components

Figure 2. Vacuum Circuit Breaker Module
Vacuum Interrupter/Operator Description
Introduction
The Type 3AH vacuum circuit breaker operator is intended
for application in a drawout truck for use in medium voltage
metal-clad switchgear. The 3AH circuit breaker conforms
to the requirements of ANSI Standards, including C37.20.2,
C37.04, C37.06, C37.09 and C37.010.
The circuit breaker consist of three vacuum interrupters, a
stored energy operating mechanism, necessary electrical
controls and interlock devices, disconnect devices to
connect the circuit breaker to both primary and control
power and an operator housing. In a typical installation in
a drawout truck, insulating barriers are located between the
vacuum interrupters and along the sides.
This section describes the operation of each major subas-
sembly as an aid in the operation, installation, maintenance
and repair of the circuit breaker.
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