Siemens 3AH Installazione Funzionamento e manutenzione - Pagina 8
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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
Figure 2. Vacuum Circuit Breaker Module
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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