- 70 -UMC22-FBP
Universal Motor Controller UMC22-FBP
Software version 4.0
FieldBusPlug / Issue: 02.2008
V 6
Tolerance of tripping time
(incl. total ranges of current,
temperature 0-55°C, frequency
45-65 Hz)
UMC22 alone +/- 10 %
UMC22 with provided
current transformer
(see chapter 6)
+/- 14 %
Phase loss protection:
phase loss is detected (fault is signalled)
If the actual current of one phase (or
two phases) hase less than 50% of the
actual current in the other phases.
The phase loss protection operates
correctly only when the actual current
of two phases is 80% or more of the
nominal current.
Tripping time for phase loss Trip class 5 approx. 1.5 s
10 approx. 3 s
20 approx. 6 s
30 approx. 9 s
Cooling simulation After tripping the thermal memory cal-
culates the reduction of the motor tem-
perature (independend of the parameter
Cooling time)
internal cooling time
constant
approx. 20 min
if UMC22 is not longer
supplied
Calculation continues for some minutes
(typ. 20 min.)
Cooling time (parameter) An appropriate value need to be set
(default = 120 s)
The cooling time that
need to be set depends
on:
- Motor size of the motor: larger size
longer cooling time
- After trip motor still rotating (driven) or
standstill (without ventilation longer
cooling time)
- Environment temperature: higher tem-
perature longer cooling time
Regarding this situation the needed
cooling time can be assumed. Some ex-
amples of motor cooling time constants
(motor standstill) can help to calculate
(motors for explosive atmospheres).
Motor size: 1 kW 1-pole Cooling time constant: 10 min
Motor size: 5 kW 1-pole Cooling time constant: 15 min
Motor size: 5 kW 2-pole Cooling time constant: 20 min
Motor size: 20 kW 2-pole Cooling time constant: 30 min
Motor size: 20 kW 3-pole Cooling time constant: 40 min
Motor size: 100 kW 3-pole
Cooling time constant: 70 min
After three times the of cooling time constant, the motor has nearly
the environment temperature.
5.1 Main power lines (continued)
Chapter 5.1~2
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