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General Information; Range Of Application - Siemens 3AK Operating Instructions Manual

Vacuum circuit-breaker module.
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General information

Intended use
9229 9923 176 0B
Dangerous voltage and mechanical movements
When operating electrical devices, certain parts will always be live, and
mechanical parts may move very quickly, even when remotely controlled.
If the warnings are not observed, serious injury or damage to material may be the
Only personnel with the relevant qualifications may work on or in the vicinity of
this device. These personnel must be familiar with all the warnings and servicing
measures specified in these operating instructions.
Smooth and safe operation of this device requires proper transport and storage, and
professional installation and assembly, as well as careful operation and mainte-
The basic version and all listed configurations of the vacuum circuit-breaker mod-
ules are type-tested devices as per IEC (3AK3 as per IEEE).
In the event of subsequent attachments or integrations, e. g. locking parts in con-
nection with switchgears, ensure that
fast-moving parts are not additionally loaded with mass or force, and
additional parts have sufficient clearance, especially from moving and live
If vacuum circuit-breaker modules are to be equipped with additional functions by
the customer, we recommend consulting the factory, since tried and tested solu-
tions are frequently available (see also "Additional equipment", on page 17).

Range of application

3AK vacuum circuit-breaker modules are 3-pole interior circuit-breakers for a rated
voltage range of 7.2 kV - 17.5 kV.
Under normal operating conditions, the vacuum circuit-breaker modules are main-
tenance-free up to 10 000 operating cycles.
3AK vacuum circuit-breaker modules are suitable for switching any type of alternat-
ing current circuits under normal operating conditions, such as:
Three-phase motors for reversing, turning and direct operation
Resistor consumers
Suitable for high frequency of operation and unlimited on-time.
3AK vacuum circuit-breaker modules operate in continuous, periodic and short-term
General information


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