Description
2.4 Standards and guidelines
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
51
2.4.2
Certificates
Information regarding available certifications such as UL, CE, CSA and marine approvals
can be found in our Service and Support Portal on the Internet at the following link
http://support.automation.siemens.com/WW/view/en/54137334/134200
In the Entry List you can use the certificate type (general product approval, explosion
protection, test certificates, shipbuilding, etc.) as a filter criterion.
2.4.3
Ambient conditions
Pollution degree
Operation of the 3VA5 and 3VA6 molded case circuit breakers is approved in accordance
with IEC / EN 60947-1 and IEC / EN 60664-1 for pollution degree 3.
Ambient temperature
3VA UL molded case circuit breakers may be used at ambient temperatures from -25 °C to
+70 °C.
3VA UL thermal-magnetic circuit breakers are calibrated for use at +40 °C.
There may be reductions in the rated operational current depending on ambient conditions,
frame size and accessories used (Derating (Page 454)).
Please contact Siemens concerning operating conditions that are outside the values
specified in the derating table.
The permissible storage temperature in original Siemens packaging is between -40 °C
and +80 °C.
Special climatic requirements
3VA UL molded case circuit breakers can also be used under harsh conditions.
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, Annex Q for Class E 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".
