Siemens 3VA1 100 A Manual page 503

Note
These values do not apply to all mounting conditions for molded case circuit breakers and
may deviate depending upon factors such as cables and busbars, packing density,
ventilation, etc.
Please observe the applicable overriding guidelines (e.g. IEC 61439).
When terminals with auxiliary conductor connection are used, the total current from the main
circuit and auxiliary conductor must not exceed the maximum rated operational current of the
molded case circuit breaker.
Example 1
Starting point:
A plug-in version of a 3VA2 molded case circuit breaker 160 A with an ETU350 LSI trip unit
is to be operated at 70 °C:
I
r(max 70° C)
No derating is required.
Example 2
Starting point:
A plug-in version of a 3VA2 molded case circuit breaker 250 A with an ETU850 LSI trip unit
is to be operated at 60 °C with the COM060 communication module:
I
r(max 60 °C)
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02
= 160 A
= 205 A
Technical specifications
6.4 Derating and temperature compensation
503