Soft Starter Control Panel

Soft Starter Control Panel
Open Soft Starter Control Panel

Description

Overview

The soft starter control panel is intended for three-phase squirrel-cage induction motors. Its basic arrangement combines a soft starter, bypass contactor and circuit breaker to control starting and stopping while providing motor and short-circuit protection.

Control and operating data

  • Supply: three-phase 380V±15%, 50/60Hz.
  • Starting time and initial voltage can be selected for the load, with a configurable current limit.
  • Soft-stop and free-stop modes, bypass-contactor operation after starting, and sequential starting of multiple motors where engineered for the application.
  • Operating conditions: fewer than 20 starts per hour, below 3000m altitude, -30-55°C and below 90%RH without condensation.
  • Available enclosure classes listed as IP20 and IP30.

Application guidance

The application table gives starting and stopping settings for representative loads. Final settings must follow motor and driven-load requirements rather than being treated as universal values.

Technical data

Application starting guidance

Varieties of Application Loads

Start Ramp Time (S)

Stop Ramp Time (S)

Inception Voltage (%)

Voltage Start (Maximum Current-limiting Value)

Current-limiting Start

Centrifugal Pump

16

20

40

4

2.5

Ball Grinder

20

6

60

3.5

Fan

26

4

30

Piston Type Compressor

16

40

3

Light Load Motor

2

30

Elevating Mechanism

6

10

60

3.5

Mixer

16

2

50

3

Crusher

10

3.5

Screw Compressor

2

40

3

Spiral Conveyor

20

10

2

Leather Belt Conveyer

2.5

Heat Pump

16

20

3

Drawings and connection details

Soft starter control panel model-code structure for motor count, starter quantity and control power.
Soft starter control panel model-code structure for motor count, starter quantity and control power.
Soft starter control panel main and bypass circuit schematic.
Soft starter control panel main and bypass circuit schematic.
Soft starter cabinet circuit arrangement for sequential motor starting.
Soft starter cabinet circuit arrangement for sequential motor starting.
Soft starter control and current-measurement circuit diagram.
Soft starter control and current-measurement circuit diagram.

Documents