Technical data

“Universal” spare circuit breaker
The physical configuration and interlock
logic allow the use of a single circuit
breaker to serve as a “universal” spare
circuit breaker at an installation site. The
interlock logic checks the principal rating
characteristics (continuous current,
maximum voltage and interrupting
current) and allows a circuit breaker to be
inserted in any circuit breaker cell,
provided that the ratings of circuit
breaker equal or exceed the ratings
required by the cell.
Single source responsibility
Single source responsibility is assured
since the complete equipment is
designed by Siemens and is
manufactured and tested in a single
facility. The vacuum circuit breakers
are checked in the switchgear cells as
part of production testing. After tests
and interchangeability checks, the circuit
breakers are separately packed for
shipment.
Full ANSI design background
Full design integrity is assured. ANSl/IEEE
C37.09 and C37.20.2 require design tests
on circuit breakers and structures
together. The type 3AH3 operator is
produced in our global center of
competence for circuit breakers in Berlin,
and final assembly of both the drawout
type 38-3AH3 circuit breaker and the
switchgear structures occurs in a single
facility. Siemens controls the entire
process, from design concept to
production. Records are maintained to
and production is certified to ISO 9001
requirements to document compliance
with ANSl/IEEE standards.
UL or C-UL Listing available (40 kA
only)
Where the arrangement of components
allows, UL or C-UL Listing is available.
Quality systems
Facilities involved with application,
engineering, design and production are
certified to ISO 9001 requirements.
5
Overview