Peter electronic VersiStart p III 105, Инструкции по сборке и пусконаладке

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VersiStart p III 50
Constant Current with Current Ramp
Current ramp soft starting raises the current from a specified starting level (1) to a
maximum limit (3), over an extended period of time (2).
Current ramp starting can be useful for applications where:
•
the load can vary between starts (for example a conveyor which may start
loaded or unloaded). Set the initial current (parameter 2C) to a level that will
start the motor with a light load, and the current limit (parameter 2D)
to a
level that will start the motor with a heavy load.
•
the load breaks away easily, but starting time needs to be extended (for
example a centrifugal pump where pipeline pressure needs to build up
slowly).
•
the electricity supply is limited (for example a generator set), and a slower
application of load will allow greater time for the supply to respond.
C
ur
rent
(%
m
ot
or
f
ul
l l
oa
d c
ur
re
nt
)
700%
600%
500%
300%
100%
400%
200%
1
4
3
2
1:
Initial Current (parameter 2C)
2: Start Ramp Time (parameter 2B)
3: Current Limit (parameter 2D)
4: Full voltage current
Time
Adaptive Control for Starting
In an adaptive control soft start, the VersiStart p III adjusts the current in order to
start the motor within a specified time and using a selected acceleration profile.
NOTE
The VersiStart p III will apply the current limit on all soft starts, including
adaptive control. lf the current limit is too low or the start ramp time
(parameter 2B) is too short, the motor may not start successfully.
S
pee
d
0
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0
4
8
2
7
.C
1
2
3
4
Adaptive Start Profile (parameter
2E):
1. Early Acceleration
2. Constant Acceleration
3. Late Acceleration
4.
Start Ramp Time (parameter
2B)
Time