BONFIGLIOLI ACTIVE CUBE 201 Operating Instructions Manual page 239

Conventional motor circuit breakers are
commercially available
applications with
characteristics (L, G/U, R and K), as shown
in the diagram on the right. As frequency
inverters in most cases are used for
supplying motors which are classified as
operating equipment with very high starting
currents, only the K characteristic was
realized in this function.
Unlike the operation of a conventional motor
circuit breaker which
equipment to be protected immediately if
the trigger threshold
function provides the possibility of issuing a
warning instead of
equipment immediately.
The rated current of the motor circuit
breaker refers to the rated motor current
stated via parameter
Rated Current
the corresponding data set.
The rated values of the frequency inverter
are to be considered accordingly when it
comes to dimensioning the application.
The function of the motor circuit breaker can be linked to different data sets. In this way, it is
possible to operate different motors via one frequency inverter. Thus, each motor can be equipped
with its own motor circuit breaker.
In case a motor is operated via the frequency inverter for which some setting values, e.g. minimum
and maximum frequency, are changed via the data set switch-over, only one motor circuit breaker
may be installed. This functionality can be differentiated by selecting the parameter
571 for single motor operation or multiple motor operation.
Operation Mode 571
0 - off
K-Char.,Multi-Motor
1 - Op.,
Err.Sw.Off
K-Char.,Single-Motor,
2 -
Err.Sw.-Off
K-Char.,Multi-Motor
11 -
Op.,Warning
K-Char.,Single-Motor,
22 -
Warning
I²t, Single-Motor,
42 -
Err.Sw.-Off
I2t,Multi-Motor
51 -
Op.,Warning
I2t,Single-Motor
52 -
Op.,Warning
12/16
for various
different trigger
disconnects the
is reached, this
disconnecting the
371 of
The function is deactivated.
In each of the four data sets, the rated values are monitored.
Overloading the drive is prevented by the fault switch-off "F0401".
The rated values in the first data set are used independently of the
active data set. Overloading the drive is prevented by the fault switch-
off "F0401".
In each of the four data sets, the rated values are monitored.
Overloading the drive mechanism is signaled by a warning message
"A0200".
The rated values in the first data set are used independently of the
active data set. Overloading the drive mechanism is signaled by a
warning message "A0200".
see Chapter 19.5.2
see Chapter 19.5.2
see Chapter 19.5.2
Operating Instructions ACU
x nominal current
Function
Operation Mode
239