3 Phase Induction Motor Soft Starter

The SSD1 series 3 phase induction motor soft starter integrates advanced electronics, microprocessor technology, and modern control principles to achieve precise management of starting voltage in asynchronous motors. This device serves as an optimal starting solution for high-inertia loads such as fans, pumps, conveyors, and compressors. It is designed to effectively replace traditional starting equipment like star-delta starters, autotransformers, and magnetic control voltage reduction starters, offering enhanced reliability and efficiency for motor startup protection.

Intelligent Start Control: Utilizes advanced algorithms to linearly and smoothly regulate voltage and current during motor startup, effectively suppressing starting surges and extending the service life of both mechanical systems and electrical grids.

Broad Application Adaptability: Particularly suited for medium- to high-power loads with demanding starting requirements, including pumps, fans, conveyors, and compressors, significantly reducing mechanical and electrical stress during startup.

Modernized Alternative: Compared to conventional solutions such as star-delta or autotransformer starters, this product provides superior smoothness, control accuracy, and system integration, making it an excellent choice for upgrading equipment starting methods.

The SSD1 series soft starter is engineered with user-centric design and robust protection features, ensuring both operational simplicity and system reliability. Its technical profile is highlighted by the following key characteristics:

• Intuitive Parameter Management: Features a tree-structured menu system for straightforward navigation, allowing users to easily view and adjust settings.
• Comprehensive Diagnostic Tools: Includes a dynamic fault recording function that logs operational events, facilitating quick troubleshooting and root cause analysis.
• Multi-Layered Protection Suite: Provides integrated safeguards against overcurrent, three-phase imbalance, overheating, phase loss, and motor overload to ensure equipment safety.
• Standardized Connectivity: Equipped with a standard Modbus communication protocol, enabling seamless integration into broader industrial automation networks.
• User-Friendly Mechanical Design: Boasts a logical layout with plug-in terminals for simplified wiring, making both installation and daily use more convenient.
• Optimized Board Architecture: Incorporates the control and power boards into a single, unified assembly. This design reduces complexity, lowers potential failure points, and contributes to overall cost-effectiveness.

  Main loop work voltage: AC380 (+10%-15%) ;

  Main loop work current: 40A~1200A;

  Current limiting times: 1.5~5.0le;

  Main loop frequency: 50Hz/60Hz ( ±2%) ;

  Initial voltage: 25%~80%Ue;

  Cooling method: natural cooling;

  Control loop power supply: 110-220V±15%(0.5A)AC/DC

  Soft starting rising time: 1~120S;

  Communication method: RS485 series communication ;

  Soft stop time: 0~60S;

  Starting times ≤10/h

The SSD1 3 phase induction motor soft starter employs a power circuit configuration featuring six silicon-controlled rectifiers (SCRs), arranged in an anti-parallel, series-connected topology. This circuit is directly integrated with the stator windings of the AC motor. Operating on the principle of electronic switching via the SCRs, a built-in microprocessor precisely regulates the trigger angle. This control dynamically adjusts the SCRs' conduction angle, thereby modulating the voltage supplied to the motor and facilitating a smooth, controlled acceleration.

Once the start-up sequence is complete and the motor reaches its rated operating voltage, the system seamlessly engages. A bypass contactor (KM) is activated, connecting the motor directly to the main power supply. This allows the soft starter to be effectively bypassed during normal running operation, optimizing overall system efficiency.

Instruction:

1. Main loop wiring: Terminal R-S-T connect power supply; Terminal U-V-W connect motor

2. Control power supply wiring: it connects control power supply terminal D1 and D2

3. Ground wiring: it connects power supply terminal D3.

4. K3 controls bypass contactor. K2 is for fault output, K1 is for running output. They are pass contacts.

5.Start and stop loop wiring: Follow circuit diagram to connect control loop terminals P1, P2, P3.

6. P4 is programmable input terminal.

7. A5 and A6 are 4-20mA analogue signal output terminals.

8. A1,A2,A3,and A4 are RS485 communication terminals.

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