Chapter 5 - Commissioning
88 3BHS335648 E82 UNITROL 1020 User Manual
5.3.1.3 Setup \ Soft Start
Soft start must match the start-up time of the machine. Soft start ramp should reach
100% nominal voltage after the machine reaches nominal frequency.
5.3.1.4 Setup \ Field Flashing
Field flashing must start to build up voltage, but on the other hand must not over-excite
the machine. Designing a proper field flashing is a demanding engineering task.
Maximum excitation current of field flashing circuits must be between 10% and 15% of
I
e
no load.
5.3.1.5 Setup \ Limiters, in Manual and Open Loop Mode
No limiters are active in Manual and Open loop mode.
5.3.1.6 Setup \ Limiters \ Operational Limits \ UM Limiter
The limiting values of the UM limiter are, as a rule, set equally, like the setpoint range
of the voltage regulator (Auto mode).
5.3.1.7 Setup \ Limiters \ Operational Limits \ Ie Limiter
Depending on the machine data and recommendations of the machine supplier.
5.3.1.8 Setup \ Limiters \ Operational Limits \ IM Limiter
Depending on the machine data and recommendations of the machine supplier.
5.3.1.9 Setup \ Limiters \ Operational Limits \ Q Limiter
Depending on the machine data and recommendations of the machine supplier.
5.3.1.10 Setup \ Digital I/Os, Configuration
Software configuration of the digital I/Os
Define terminal as input or output
Assign terminal to desired signal
Select polarity
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