75-115KW Online soft starter

Product Introduction

1. Product Overview

• This soft start controller uses advanced microprocessors as its core, applies advanced software design methods and the latest hardware technology, and adopts thyristor phase-shifting technology to achieve soft start and soft stop functions for AC asynchronous motors. It also has multiple protection functions such as phase failure, overvoltage, undervoltage, overcurrent, overload, three-phase imbalance, and short circuit.

• This soft starter covers 7.5KW~600KW, with reliable quality and good electromagnetic compatibility (EMC). It can be widely used in heavy-duty equipment such as fans, water pumps, ball mills, crushers, conveyors, and compressors. Before installing or operating this soft starter, please read and understand this manual. Only professionals can provide the ideal replacement product for pressure reducing starting equipment such as diagonal conversion, autotransformer pressure reduction, and magnetic control pressure reduction.

2. Product features

• Adopting high-performance microcontrollers and digital logic control technology, it has strong anti-interference ability.

• The startup parameters can be flexibly set according to different loads to achieve the optimal current curve and torque control characteristics.

• Provides a smooth and gradual starting process for the electric motor, reduces the impact of starting current on the power grid, and lowers equipment vibration and noise,

• Extended the service life of the mechanical transmission system and improved the working environment for workers.

• The starting current can be adjusted according to the load to reduce starting losses and generate optimal torque with minimal current.

• There is no phase sequence requirement for the input power supply.

• It can be set as free parking and soft parking, with adjustable soft parking time.

• Comes with standard RS485 interface and Modbus protocol (order declaration).

• Adopting a 4x8 LCD display, parameter modification and operation are simple and intuitive.

• The product has a novel structure, reliable performance, strong functionality, and easy installation and operation.

3. Product Application Introduction

• The product is widely used in various industries such as thermal power generation, hydropower, power transmission and distribution equipment, metallurgy, chemical industry, mining, and construction.

• The water pump utilizes the soft stop function to alleviate the water hammer phenomenon when stopped, saving the cost of system maintenance.

• The ball mill utilizes a voltage ramp to start, reducing gear torque wear and maintenance workload, saving both time and expenses.

• The fan reduces belt wear and mechanical impact, saving maintenance costs.

• The belt conveyor achieves a smooth and gradual starting process through soft start, avoiding product movement and material spillage.

• The compressor utilizes current limiting to achieve smooth start-up, reduce motor heating, and extend service life.

4. Usage and environmental conditions

Applicable standard: GB14048.6-2008

Usage category: AC-53A or AC-53B

Rated voltage: 380V+15%, AC three-phase symmetrical power supply: available

Customized soft starters with rated voltages of 220V, 480V, and 660V

Frequency: 50Hz/60Hz+2%

Startup frequency: 12 times/hour

Cooling method: Natural air cooling for soft starter, fan cooling for intelligent soft starter cabinet.

Installation method: wall mounted or cabinet vertical

Protection level: IP00

Operating altitude: 1000 meters without capacity reduction (for every 100 meters increase above 1000 meters, the current decreases by 0.5%)

Environmental temperature: Storage: -25℃~+70°C

Working temperature: -5℃~+55℃，40℃Above, 1 per liter℃2% reduction in current

Relative humidity: maximum 90% (temperature at 20 ° C)℃When)

Pollution level: Level III

5. Working principle

The principle block diagram of this soft starter is shown in Figure 2. The power part is composed of three pairs of anti parallel thyristors as shown in Figure 1. The core microprocessor of the control part collects the synchronization signal, voltage signal/current signal, and motor power factor angle of the power grid. The control software applies thyristor phase-shifting technology based on these four parameters to gradually increase the voltage applied to the motor to full voltage according to a certain law. By appropriately setting control parameters, the torque and current of the motor can be well matched with the load requirements.

6. Precautions for selecting rows

A soft starter must provide a force greater than the load resistance torque to complete the start. For ordinary loads such as water pumps, fans, etc., it is recommended to configure a soft starter with the same gear specification or a higher gear specification. For heavy loads such as ball machines, 6-stage fans, crushers, etc., it is recommended to configure a soft starter with a higher gear specification or a second gear specification.

External dimensions of soft starter

Installation requirements

Online application wiring diagram

Terminal configuration diagram

(1) Main circuit terminal diagram

(2) Terminal diagram of control circuit

(3) Control circuit terminal wiring

Key interface

Functional parameter table

Fault Code Table and Solutions