Santerno ASA 4.0 Advanced, Руководство пользователя

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Application Start Mode
Sta
rt
Ra
mp
T
ime
(seco
nd
s)
In
itia
l C
ur
re
nt
(%
FL
C)
Cur
re
nt
Li
m
it
(%
FL
C)
Stop Mode
St
op Ti
m
e
(seco
nd
s)
Pump - centrifugal
Adaptive Control
(Early accel.)
10 n/a 500
Adaptive Control
(Late decel.)
15
Pump - Hydraulic Constant Current 2 200 350 Coast To Stop n/a
Pump - positive displacement
Adaptive Control
(Const. accel.)
10 n/a 400
Adaptive Control
(Const. decel.)
10
Pump - submersible
Adaptive Control
(Early accel.)
5 n/a 500
Adaptive Control
(Late decel.)
5
Saw - bandsaw Constant Current 1 200 450 Coast To Stop n/a
Saw - circular Constant Current 1 200 350 Coast To Stop n/a
Shredder Constant Current 1 200 450 Coast To Stop n/a
8.8 Soft Start Methods
8.8.1 Constant Current
Constant current is the traditional form of soft starting, which raises the current from zero to a specified level and keeps the current
stable at that level until the motor has accelerated.
Constant current starting is ideal for applications where the start current must be kept below a particular level.
Cur
rent
(%
mot
or
ful
l load c
ur
rent
)
700%
600%
500%
300%
100%
400%
200%
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
1
3
2
1: Initial Current (parameter 2C)
2: Current Limit (parameter 2D)
3: Full voltage current
Rotor speed (% full speed)
8.8.2 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.
Cur
rent
(%
mot
or
ful
l load c
ur
rent
)
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
ASA 4.0 Advanced 35/78