Technical specifications
6.4 Derating
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
463
3VA6 molded case switches
COM060 COM060 communication module
No derating up to the rated operational current I
n
of the molded case circuit breaker
COM060 COM060 communication module
No derating up to the rated operational current I
n
of the molded case circuit breaker
Example 1
Starting point:
A 3VA61 100 A molded case circuit breaker with an ETU350 LSI trip unit is to be operated at
70 °C with plug-in technology:
I
r(max 70° C)
= 100 A
No derating is required.
Example 2
Starting point:
A 3VA62 250 A molded case circuit breaker with an ETU850 LSI trip unit is to be operated at
60 °C with plug-in technology and the COM060 communication module:
I
r(max 60 °C)
= 189 A
