Siemens SENTRON 3VA1 - Certificates; Ambient Conditions

Description
2.5 Standards and guidelines
3VA molded case circuit breakers with IEC certificate
58 Manual, 03/2019, A5E03603177010-03
2.5.3
Certificates
You can find information on the available certification (CE, UL, CSA, FM, marine approvals)
on the Internet (http://support.automation.siemens.com/WW/view/en/54137334/134200
).
In the Entry List you can use the certificate type (e.g. general product approval, explosion
protection, test certificates, shipbuilding) as a filter criterion.
2.5.4
Ambient conditions
Pollution degree
Operation of the 3VA1 and 3VA2 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 molded case circuit breakers are used at ambient temperatures from -25 °C to +70 °C.
Derating (reduction in rated operational current) is required at temperatures above +50 °C.
You will find more information on the applicable derating factors in chapter Derating and
temperature compensation (Page 628).
The permissible storage temperature in original Siemens packaging is between -40 °C
and +80 °C.
Special climatic requirements
3VA 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".