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Manually Activated Star-Delta Starter
Manually switching with cam-switch
Special features:
- Economical star-delta starter for P > 3.0 kW
- Reduces startup current requirements by 1/3 over direct startup current
- Mounting in compact cases possible
Capacity:
- 4.0 - 9.0 kW
(P>9.0 kW on request)
Versions:
- K3000, K3500, K4000
- Custom housing as e.g.:
KB44214, Dimensions: 100 x 100 x 120 mm (LxWxD)
KB44216, Dimensions: 150 x 110 x 140 mm (LxWxT)
KB44217, Dimensions: 190 x 140 x 140 mm (LxWxD)
KB44218, Dimensions: 240 x 190 x 160 mm (LxWxD) - Other versions on request
Functional description:
Star-delta starters are employed with asynchronous motors of 4 kW and larger to prevent excessive startup currents. Startup current limits are usually established by public energy companies.
The simplest design for a star-delta switchover is realized with a cam switch. The switchover from OFF to star then to delta is accomplished manually by the operator. In order to avoid undesirable voltage surges, at least 80% of full speed must be reached before the switchover from star to delta takes place. The appropriate motor voltage must be accomodated when connecting the motor.
A motor suited for star-delta startup must have a voltage rating of 380 V/660 V or delta 380 V. Six external winding terminals are necessary to connect such motors.
Examples for manually activated star-delta-starters:
K3500 with shrouded plug 16 A, undervoltage trigger, overload protection, electronic brake, motor connection lead
K3500 with shrouded plug 16 A, undervoltage trigger, overload protection, main switch, motor connection lead
K4000 with shrouded plug 32 A, undervoltage trigger, overload protection, motor connection lead
K4000 with shrouded plug 32 A, undervoltage trigger, overload protection, electronic brake, main switch, emergency-stop-button, motor connection lead
K3500 with shrouded plug 16 A, undervoltage trigger, overload protection, emergency-stop-button, motor connection lead
KB44217 with shrouded plug 32 A; undervoltage trigger, overload protection, main switch, limit switch cable, motor connection lead
