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Low Voltage Solid-State Soft Starter Cabinet

Low-Voltage Solid-State Soft Starter Cabinet

The Low-Voltage Solid-State Soft Starter Cabinet is a high-performance motor starting and control device designed for low-voltage motors. It uses semiconductor components to achieve smooth start-up, reduce inrush current, and provide controllable stop and speed regulation. The cabinet features a compact structure, stable performance, and fast response, making it ideal for pumps, fans, compressors, and industrial production line motor systems.

Equipped with high-quality electrical components and an intelligent control system, the cabinet supports multi-stage soft start, overload protection, and fault alarm functions. It effectively extends motor life, reduces mechanical wear, and improves operational efficiency. Easy to operate and maintain, it is suitable for industrial low-voltage motor energy-saving upgrades and control improvements.

  • Solid-state soft start, smooth start/stop, reduces mechanical impact

  • Low starting current, minimizes grid impact

  • Multi-stage soft start and controllable stop functions

  • Comprehensive protection system with fault alarms, reliable operation

  • Suitable for pumps, fans, compressors, and industrial production line motors

Applications: Industrial pump stations, fan systems, compressors, and various low-voltage motor-driven industrial equipment.

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Excerpt:

The low voltage solid-state soft starter cabinet is designed to provide smooth motor starting and protect low-voltage motors from inrush current and mechanical stress. It ensures reliable, energy-efficient operation and prolongs motor lifespan in industrial applications.

Low-Voltage Solid-State Soft Starter Cabinet: Complete Intelligent Motor Starting & Control Solution


01 Product Overview: Innovative Motor Starting Technology

The Low-Voltage Solid-State Soft Starter Cabinet is an advanced motor starting device using power electronics and intelligent microprocessor control, designed for three-phase asynchronous motors. By applying thyristor (SCR) phase control, it precisely regulates motor voltage and current, addressing issues of high inrush currents, mechanical stress, and energy waste associated with DOL, Y-Δ, and autotransformer start methods.

Simo Motor’s low-voltage soft starter integrates digital control, soft start/stop, real-time monitoring, and comprehensive motor protection, making it a key solution for modern industrial automation in sectors like power, metallurgy, mining, chemical, construction, and water treatment.

低压固态软起动柜
Low Voltage Solid-State Soft Starter Cabinet

02 Core Technology & Structural Design

1. Intelligent Control Principle

  • Microprocessor-Based Control (CPU): Controls SCR firing angles via optically isolated triggers.
  • Soft Start Modes: Includes constant-current start, voltage ramp start, and flexible ramp profiles.
  • Automatic Bypass: When the motor reaches rated speed, the bypass contactor engages for full-voltage efficient operation.
  • Precision Control: Smooth voltage and torque ramp reduces grid impact and mechanical stress.

2. Precision Structure & Safety

  • Modular Components: SCR modules, motor protection modules, communication interface, and control transformer for easy maintenance and expansion.
  • Three-Chamber Isolation: Power module, control relay chamber, and main circuit connection chamber isolated to enhance anti-interference.
  • Multiple Protection Mechanisms: RC snubber, static/dynamic voltage balancing, overload protection (125% rated continuous, 500% for 60s).
  • Optimized Cooling: ≤75kW natural air cooling; ≥90kW forced air cooling for stable operation.

03 Core Functions & Advantages

1. Multi-Mode Start & Stop

  • Current-Limited Start: Limits inrush to 100–500% rated current, reducing voltage dips and distribution upgrade costs.
  • Voltage Ramp Control: Adjustable initial torque 30–90% of rated voltage, smooth acceleration for various loads.
  • Pulse Kick Start: Overcomes static friction for heavy loads.
  • Soft Stop: Gradually reduces voltage to prevent water hammer; adjustable 0–60s stop time.

2. Intelligent Diagnostics & Communication

  • HMI Interface: LCD and keyboard for monitoring and parameter configuration.
  • Remote Monitoring: RS-485 interface, supports Modbus for DCS integration.
  • Fault Recording: Logs recent faults for quick diagnostics; includes over/under voltage, phase loss, overcurrent protection.
  • Analog Output: 4–20mA for process control integration.

3. Efficiency & Cost Advantages

  • Reduced Inrush Current: Protects the grid and minimizes mechanical stress.
  • Extended Motor Life: Lowers vibration and wear, reduces maintenance and replacement costs.
  • Energy Saving: Avoids unnecessary power spikes, optimizing operational efficiency.

04 Technical Specifications

ParameterSpecification
Rated VoltageAC 380V (-20%, +15%)
Control VoltageAC 220V ±10%
Rated CurrentUp to 630A
Applicable Motor30–630kW squirrel-cage asynchronous motors
Start ModesVoltage ramp, current-limited, pulse kick, constant voltage, jog
Protection LevelIP20 (customizable)
Cooling Method≤75kW natural air, ≥90kW forced air
Operating Temperature-25℃ ~ +40℃
Humidity≤95%, non-condensing

05 Application Scenarios & Industry Solutions

1. Typical Load Applications

  • Pumps: High-head, circulation, or supply pumps; soft stop prevents water hammer.
  • Fans & Compressors: Heavy-load start mode protects high-inertia loads.
  • Heavy Machinery: Ball mills, crushers, conveyors, mixers; reduces mechanical shock.
  • Conveyors: Smooth start avoids material spillage.

2. Industry Applications

  • Power: Protects auxiliary motors for stable production.
  • Cement: Soft start for mills, fans, crushers under frequent stop-start conditions.
  • Chemical: Pumps, compressors, fans receive reliable start protection.
  • Metallurgy: Protects rolling mill and fan motors.
  • Mining: Ensures safe operation of hoists, pumps, and ventilation systems.

06 Selection & Installation Guide

1. Key Selection Factors

  • Motor parameters: voltage, power, starting torque, load type.
  • Environment: altitude, temperature, protection, and explosion-proof requirements.
  • Function: communication protocols, soft stop, remote control.
  • Load type: standard or heavy load; starting frequency (≤15 starts per hour recommended).

2. Installation & Maintenance

  • Auxiliary Devices: Requires bypass contactor and motor protection devices.
  • Environment: Fire/explosion-free, non-corrosive, low dust, vibration <0.5G.
  • Cooling: Ensure adequate ventilation; forced-air models require operational fans.
  • Maintenance: Periodically check RC snubbers, SCR modules, trigger circuits, and clean airways.

07 Core Advantages of Simo Low-Voltage Soft Starter

  • Certified Quality: ISO9001 ensures stable and reliable product quality.
  • Reliable Design: High-quality components, tested for thermal cycling and vibration.
  • Intelligent Protection: Comprehensive protection for phase loss, overload, overcurrent, overheating, and start time limits.
  • Flexible Configuration: Adjustable output to match actual load when nominal power exceeds load requirements.
  • Full Lifecycle Service: One-stop support from design to training, with lifetime upgrade options.

Simo Low-Voltage Solid-State Soft Starter Cabinet is an ideal replacement for traditional motor starters, providing advanced control, reliable protection, energy efficiency, and smart operation. It enables industrial users to achieve intelligent, safe, and cost-effective motor starting, increasing productivity and operational reliability.

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Simo Motor After-Sales Service Policy: Quality First, Customer Foremost

Sincere, Attentive, Dedicated — Simo Always Cares


Preface

Thank you for choosing Simo Motor products. As a company with many years of experience in motor manufacturing, Simo Motor always adheres to the principle of "Quality First, Customer Foremost." Through a comprehensive service system, we ensure that every customer enjoys efficient and professional after-sales support.

Our products have repeatedly been awarded provincial, municipal, and national honors such as “High-Quality Product,” “China Famous Brand Product,” “National Exemption from Inspection Product,” and “China Well-Known Trademark.” To further enhance customer experience, we have formulated this after-sales service policy, aimed at providing comprehensive, prompt, and satisfactory service guarantees.


1. Quality Assurance Commitment

Simo Motor strictly implements full quality control in accordance with international standards, national standards, industry standards, and corporate standards:

  • All products are manufactured under the effective operation of the GB/T 19001-2008/ISO 9001:2008 Quality Management System, ensuring rigorous inspection from raw material intake to final product delivery.

  • We guarantee that all products provided are brand new, unused, and meet the quality requirements stipulated in customer contracts.

  • We maintain a quality management system compliant with GB/T 19001-2000 idt ISO 9001:2000, ensuring its effective operation.


2. Pre-Sales Service

To help customers make the best choice, Simo Motor provides comprehensive pre-sales support:

  • Professional Technical Consultation: Responding to customer inquiries about motor products and technical issues.

  • Personalized Solutions: Objectively introducing Simo Motor product features and performance, and providing customized power solutions.

  • Comprehensive Product Information: Providing detailed quotations, drawings, and motor samples to help customers fully understand the product.


3. Ordering Instructions

To ensure the motor meets your usage requirements, please specify the following parameters when placing an order:

  • Basic Parameters: Motor model, rated power, rated voltage, number of poles, rated frequency.

  • Installation Environment: Protection level, cooling method, installation type, rotation direction, environmental conditions, cable exit position.

  • Usage Conditions: Installation altitude, working environment temperature, motor load type.

For special requirements, a separate technical agreement must be signed before placing an order. You may also call our customer service hotline 159-0292-3228 for professional guidance.


4. Warranty Policy Details

1. Warranty Period

Simo Motor provides a warranty of up to two years from the shipping date. Within this period, if the motor is damaged or cannot operate properly due to manufacturing defects, Simo Motor will repair or replace parts or the motor free of charge.

2. Warranty Coverage

  • The warranty covers product quality issues caused by our company, with free replacement of parts or free repair.

  • Warranty services require correct use and regular maintenance, following the original operation manual and recommended lubrication, cleaning, and care instructions.

3. Exclusions from Warranty

The following are not covered by the warranty:

  • Damage caused by non-designated personnel

  • Unauthorized modifications or self-repair

  • Use of non-official parts or software

  • Failure to follow operation manual instructions for use, handling, and maintenance

  • Damage caused by natural disasters (wind, fire, flood, earthquake, etc.)

  • Normal wear and tear under standard use


5. Post-Warranty Service

After the warranty expires, Simo Motor continues to provide service support:

  • Lifetime Paid Service: After the warranty period, if the product fails, we offer lifetime paid service, supplying consumable parts and components at cost price.

  • Regular Follow-Up: Our after-sales staff will periodically contact users to check product status and address potential issues.

  • Professional Repair Services: The company undertakes repair services for all types of motors, whether under warranty or not, providing professional maintenance and inspection.


6. Service Commitment and Standards

Simo Motor upholds the "Sincere, Attentive, Dedicated — Simo Always Cares" Three-Heart Service Philosophy, ensuring excellent customer experience through standardized service processes:

  • Professional Service Team: A dedicated team provides installation guidance, fault diagnosis, and repair services, ensuring efficient motor operation.

  • Rapid Response Mechanism: After receiving customer feedback, our after-sales team responds promptly and formulates quick solutions.

  • Full Tracking and Records: All service processes are documented to ensure traceability and continuous improvement of service quality.


7. Customer Complaint Channels

If you are not satisfied with Simo Motor’s services, please provide feedback through the following channels:

  • Direct complaints to the service department or headquarters

  • Call our customer service hotline: 159-0292-3228

We take every feedback seriously and continuously strive to improve our service quality.


Conclusion

Simo Motor will continue to provide high-quality products and professional after-sales service. Through a complete service system, we solve your concerns and ensure peace of mind. We firmly believe that only with customer success can Simo Motor grow. Choosing Simo Motor means choosing quality and trust.

Simo Motor — Dedicated Service, Creating the Future Together!

Simo Motor Brand Advantages: Outstanding Quality, Leading Innovation and Development in the Motor Industry

Over 60 Years of Professional Experience, Setting the Benchmark in the Motor Industry


Brand Heritage and Strength

Simo Motor (formerly Xi’an Motor Factory) was established in 1955. As one of the leading enterprises in China’s motor industry, it has over six decades of manufacturing experience and technical expertise. Today, the company has grown into a large-scale modern enterprise integrating motor product R&D, manufacturing, and sales. Its products are widely used in key sectors such as power, coal, petroleum, mining, metallurgy, railways, transportation, chemical, agriculture, water conservancy, and aviation.

With profound technical expertise and continuous innovation, Simo Motor has built a prestigious brand image in the motor industry. Its products are exported to more than 40 countries and regions, including North America, Europe, the Middle East, Southeast Asia, Africa, and Australia, earning trust and praise from global customers.


Core Technology Advantages

1. Leading R&D and Innovation Capability

Simo Motor treats technological innovation as the core driving force of enterprise development:

  • Professional R&D Team: Composed of senior engineers and technical experts focusing on cutting-edge motor technology research and applications.

  • Continuous Investment in Technology: 5%-7% of annual sales revenue is invested in R&D to ensure continuous innovation and product upgrades.

  • Patented Technology Achievements: Over 100 national patents, with multiple products receiving national and provincial science and technology progress awards.

  • Industry-Academia Collaboration: Strategic partnerships with renowned universities and research institutes to advance motor technology development.

2. Excellent Product Quality System

Simo Motor has established a robust quality assurance system to ensure each motor meets the highest standards:

  • International Certifications: ISO9001 Quality Management, ISO14001 Environmental Management, and OHSAS18001 Occupational Health and Safety certifications.

  • Strict Quality Control: 68 rigorous inspection processes from raw material procurement to final product delivery to ensure zero defects.

  • Advanced Testing Equipment: Equipped with international motor performance testing systems, vibration analyzers, noise measurement devices, and more.

  • Continuous Quality Improvement: Comprehensive feedback mechanisms for continuous optimization of production processes and product stability.


Product Advantages and Features

1. High-Efficiency Energy-Saving Technology

Simo Motor actively responds to national energy-saving policies with a series of high-efficiency products:

  • High-Efficiency Motor Series: Meets the national GB18613-2020 energy efficiency standards, with some products reaching IE4/IE5 ultra-high efficiency levels.

  • Energy-Saving Technology: Uses premium silicon steel, low-loss bearings, and efficient cooling systems to reduce operating energy consumption.

  • Intelligent Control Technology: Advanced variable frequency control systems optimize motor operation, improving energy savings by 15%-30%.

2. Outstanding Performance

Simo Motor products are known for high reliability, long service life, and low maintenance costs:

  • Powerful Output: Optimized electromagnetic design ensures high starting torque and strong overload capability.

  • Low Vibration and Noise: Dynamic balancing and noise reduction technologies ensure vibration and noise levels below national standards.

  • Strong Environmental Adaptability: Designed for harsh conditions with heat resistance, moisture-proof, and corrosion-resistant features.

  • Long Lifespan Design: Key components use specialized treatment and premium materials, with a design life exceeding 100,000 hours.

3. Comprehensive Product Series

Simo Motor provides a wide range of products to meet diverse customer needs:

  • High-Voltage Motors: Voltage levels of 6kV, 10kV, and power range 200–10,000 kW.

  • Low-Voltage Motors: Series such as YX3, YE3, YE4, with power range 0.55–1,000 kW.

  • Explosion-Proof Motors: Certified for use in flammable and explosive environments.

  • Special Motors: Customized for industries such as mining, metallurgy, and marine applications.

  • Non-Standard Customization: Strong ability to provide tailored solutions according to customer requirements.


Service System Advantages

Simo Motor has established a comprehensive customer service system:

  • Pre-Sales Technical Support: Professional selection guidance, solution design, and product demonstration.

  • In-Sales Support: Strict contract compliance, on-time delivery, and installation guidance.

  • After-Sales Guarantee: 24-month warranty, 24/7 technical support, 48-hour on-site service commitment.

  • Lifetime Maintenance Support: Customer equipment files maintained for full lifecycle service.


Industry Application Advantages

Simo Motor has extensive experience across key industries:

  • Power Industry: Provides reliable motors for thermal, hydro, and nuclear power.

  • Coal Industry: Explosion-proof motors certified for coal mine safety.

  • Petrochemical Industry: Corrosion-resistant and explosion-proof motors for harsh environments.

  • Metallurgy: High-overload, high-temperature resistant motors meet specialized equipment needs.

  • Transportation: Customized motors for railways, urban transit, and ports.


Brand Honors and Certifications

Simo Motor’s excellent product quality and market performance have earned multiple honors:

  • China Famous Brand Product, National Exemption from Inspection Product, China Well-Known Trademark

  • High-Tech Enterprise, Provincial Enterprise Technology Center

  • Multiple provincial and ministerial-level science and technology awards

  • Credit-worthy and trustworthy enterprise, AAA-level quality reputation


Conclusion

Choosing Simo Motor means choosing reliable quality, leading technology, and comprehensive service support. Over 60 years of professional accumulation have given Simo Motor deep technical expertise and rich industry experience, providing customers with the best motor products and complete power solutions.

In the future, Simo Motor will continue to adhere to the philosophy of “Quality First, Innovation Driven, Customer Foremost”, constantly improving product technology and quality, creating greater value for customers, and contributing to the development of China’s motor industry.

Simo Motor — Powerful, Efficient, and Fully Supported!

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