Applications
3.3 Motor protection applications of 3VA molded case circuit breakers
3VA molded case circuit breakers with IEC certificate
164 Manual, 03/2019, A5E03603177010-03
unbal
•
I
unbal
Adjustable from 5 to 50% relative to the
mean value of the three phase currents
in steps of 1%
•
t
unbal
tripping time
1)
during startup Adjustable from 0.7 to 60 s,
default setting 0.7 s
•
t
unbal
tripping time
1)
during normal operation Adjustable from 4 to 420 s,
default setting 4 s
The phase unbalance function can be deactivated.
1)
Adjustable tripping times with phase unbalance in firmware version 4.3 and higher.
•
I
b
1)
Adjustable from 0.4 to 10 x I
n
in steps of 1 A
•
t
b
2)
Adjustable from 0.5 to 10 s
in steps of 0.5 s
Blocking protection can be deactivated.
1)
Adjustable I
b
over 0.4 in firmware version 4.3 and higher
2)
Adjustable t
b
over 0.5 s in firmware version 4.3 and higher
•
I
<<
Adjustable from 0.3 to 0.9 x I
r
in steps of 0.01 s
•
t
<<
Adjustable from 1 to 200 s
in steps of 1 s
Idle running protection can be deactivated.
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