Description
2.5 Standards and guidelines
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02
61
Harsh conditions of storage, transportation and stationary use
The molded case circuit breakers have been tested according to the relevant special test
procedures defined in IEC / EN 60947-1, Appendix Q for
applications.
This class covers the areas MC3 + CC2 + SC1:
● Ambient temperature
● Humidity
● Vibration environment
● Shock environment
These ambient conditions can be referred to as "Open deck, damp and cold atmosphere
without salt spray" or "Difficult, non-marine conditions".
The following standards-related criteria are complied with:
● IEC / EN 60068-2-2 "Bd" and IEC / EN 60068-2-1 "Ab":
Temperature range: -25 °C … +70 °C
● IEC / EN 60068-2-30 "Db"
Humid heat up to +55 °C and air humidity up to 95 %
● IEC / EN 60068-2-6 "Fc"
Vibration test
● IEC / EN 60068-2-27 "Ea"
Shock resistance test
Between the tests of compliance with the standards and at the end of the tests, the usability
of the devices is assured with the "Verification of operation characteristics".
Vibration resistance and shock resistance
3VA molded case circuit breakers are insensitive to vibrations and meet the requirements
relating to mechanical and electromechanical vibration strength according to IEC / EN 60068
and the specifications of the shipbuilding societies.
The circuit breakers resist impacts of up to 10 g and are tested to withstand without damage
their operating conditions with shock impact according to IEC / EN 60068-2 27 "Ea" with
150 m/s² / 11 ms.
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