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Digistart IS User Guide
81
Issue: 4
www.controltechniques.com
10.8 Slip-ring motor
The Digistart IS can be used to control a slip-ring motor, using rotor resistance.
Figure 10-8 Slip-ring motor
08
53
9.
B
7
6
5
4
3
2
1
9
8
E
110-210 VAC +10%
-15%
220-440 VAC +10%
-15%
6/T3
2/T1
4/T2
5/L3
3/L2
1/L1
E
1
Control voltage
2
Remote control inputs
3
Motor thermistor input
4
RTD/PT100 input
5
24 Vdc output
6
Relay outputs
7
Analog output
8
Three-phase supply
9
Slip-ring induction motor
KM1 Changeover contactor
F1
Semiconductor fuses
(optional)
S1
Start/stop contact
S2
Reset contact
R1
Rotor resistance
(external)
Parameter settings:
Pr
4D
Relay B Action
Select 'Changeover Contactor'
Pr
4E
Relay B On Delay
Set this to the maximum time (5m:00s).
Pr
13A
Motor Data-1 Ramp
Select 'Dual Ramp' (for slip-ring induction motor control)
Pr
13D
Changeover Time
Default setting is 150 milliseconds. Set this to a value just greater than the changeover contactor (KM1) pole closing
time.
Pr
13C
Slip Ring Retard
Default setting is 50%. Set this parameter to a value which is high enough to cause the motor to instantly accelerate
once the rotor resistance (R1) has been bridged out and low enough to avoid a motor current pulse.
NOTE
For this installation to function correctly, only use the primary motor settings. Only use the constant current start method
(Pr
2A
Start Mode
).
Содержание Digistart IS1x0023B series
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