The liquid resistor starter cabinet is a device used for starting and speed control of large asynchronous motors. It regulates the motor starting current through liquid resistance to achieve smooth starting and multi-stage speed control. This equipment features a reliable structure and stable performance, effectively reducing motor starting impact and mechanical wear. It is widely applied in mining, metallurgy, power generation, and large industrial machinery systems.
The cabinet is constructed from high-quality corrosion-resistant materials and equipped with a liquid resistance adjustment system and comprehensive protective devices, ensuring simple operation, safety, and reliability. Liquid resistance starting technology guarantees smooth motor operation during startup, acceleration, and deceleration, enhancing equipment efficiency and extending service life.
Multi-stage speed regulation for adapting to varying load conditions
Reduce inrush current impact and minimize mechanical wear
Simple to operate, safe and reliable
Extend the service life of motors and mechanical equipment
Widely used in: mining coal mills, metallurgical rolling mills, power transmission systems, and various large-scale industrial equipment for starting and speed regulation applications.
Liquid Resistancestarter cabinetThe Ideal Solution for Smooth Starting of Medium and Large Electric Motors
In the industrial sector, the starting of large and medium-sized motors has always been a critical challenge. Liquid resistance starting cabinets, with their unique technical advantages, have emerged as the ideal solution to this problem.
Liquid Resistance Starter Cabinet
In the field of industrial motor control,Liquid Resistance Starter Cabinet(Also known as a water resistance cabinet) is an advanced starting device specifically designed for large and medium-sized wound-rotor asynchronous motors. It achieves motor starting by inserting a specially formulated liquid resistor into the motor's rotor circuit and altering the resistance value through the movement of plates.Smooth, shock-free start。
This starting cabinet utilizes the principle of conductivity in an electrolyte aqueous solution. It alters the resistance between the two electrodes by changing their distance within the electrolyte solution or by adjusting the electrolyte solution's concentration.effectively addresses the limitations inherent in traditional starting methods such as direct-on-line starting and autotransformer-reduced-voltage starting.High starting current, strong mechanical impactand other issues.
I. Working principle and technical characteristics
1. Smart Start Principle
The liquid resistor starter cabinet operates based on the principle of inserting a liquid resistor into the motor rotor circuit.When the starter receives the motor start signal, a low-power servo motor drives the pole plates to move, altering their relative positions and thereby changing the liquid resistance introduced into the rotor circuit.From large to small, undergoing infinite transformations。
When the resistance value decreases to its minimum, the short-circuit contactor closes, directly short-circuiting the star point of the motor rotor, thereby achieving the motor'sLow-current, high-torque smooth startThis intelligent starting method effectively reduces starting current and prevents impact on the power grid.
2. Advantages of Liquid Resistance
Liquid resistors are stepless variable resistors that utilize an electrolyte aqueous solution as the resistive medium.This design offers multiple advantages:
High thermal capacityCan be started continuously 5 to 10 times.
Low starting current: Starting current less than 1.3 times the rated motor current
Highly adaptable to low pressure: Smooth starting when the grid voltage is lower than 10% of the motor's rated voltage.
Stepless adjustmentBy altering the electrode spacing or adjusting the solution concentration, the resistance value can be steplessly adjusted within a certain range.
II. Core Structure and Design Innovation
1. Modular structural design
Liquid Resistance Starter Cabinet UtilizesModular design conceptIt consists primarily of the following components:
Cabinet StructureConstructed from welded angle steel and sheet metal, the cabinet features reserved mounting positions for the electro-hydraulic tank and electrical compartment, along with clearance for the entire drive mechanism.
Water Resistance BoxThe enclosure houses liquid resistor starting and fixed plates. During the host machine's startup process, soft starting is achieved by controlling the change in the distance between them.
Electrical Room: Equipped with various low-voltage electrical components that participate in control and protection during the host startup process.
Transmission mechanismWorm gear lifts are commonly used as transmission mechanisms, offering smooth, reliable operation with minimal noise.
2. Fully Enclosed Innovative Design
The new generation of liquid resistor starter cabinets adoptsFully enclosed structural designEquipped with a unique self-circulating cooling system and comprehensive sealing measuresThis design brings significant improvements:
Improve the sealing systemThe cabinet and water tank feature a fully enclosed structure, with precision sealing measures implemented at all connection points to effectively prevent excessive evaporation of the electrolyte.
Self-circulating coolingThe equipment is equipped with a circulation pump, forming a self-circulating cooling system comprised of external circulation components and internal circulation piping. This system rapidly dissipates heat generated within the electrolyte tank.
Wide environmental adaptability: Particularly suitable for long-term operation in arid climates with annual precipitation below 200 millimeters, addressing the issue of traditional liquid resistance starters prone to failure in harsh environments.
Third, the performance characteristics and advantages
The liquid resistor starter cabinet features multiple outstanding performance characteristics:
Constant Current Soft StartThe starting current is 2.5 to 3.5 times the motor's rated operating current, reducing the motor's starting heat generation.
Smooth start-up without impactNo mechanical stress impact on equipment, extending the service life of machinery and motors by approximately 30%.
High starting success rateEnsure successful startup on the first attempt, unaffected by grid voltage fluctuations and load variations.
Minimal impact on the power gridLow voltage drop during startup with no harmonic pollution
Simple to operate, safe and reliableFully automated operation, easy installation and maintenance
Compared to traditional starters such as frequency-sensitive rheostats, oil-immersed rheostats, and cast iron resistors, liquid resistor starter cabinets offer distinct advantages in starting performance, reliability, and service life.Compared to high-voltage variable-frequency soft starters, it also possessesSimple operation, maintenance-free, no harmonic pollutionand other advantages。
IV. Application areas and scenarios
Liquid resistance starter cabinets can be widely applied in the following fields:
Heavy Industry Sector: Applicable toBuilding materials, metallurgy, mining, petroleum, chemical industryHeavy-duty smooth soft starters for 75-10,000 kW wound-rotor asynchronous motors in industries such as
Electric Power and Water Resources: For starting large motors in auxiliary equipment, pumps, compressors, and other machinery at power plants
Special operating conditions：Suitable for situations requiringMultiple consecutive startsIn situations where power supply is unstable or voltage is low, such as in industrial and mining enterprises.
This equipment is commonly used forBall mill, crusher, compressor, blowerStarting motors for heavy-duty equipmentIt is an ideal replacement for traditional frequency-sensitive variable resistor starting cabinets.。
V. Technical parameters and specifications
The main technical parameters of the liquid resistance starter cabinet are as follows:
Parameter Item
technical specification
Applicable Motors
Wound-rotor asynchronous motor, squirrel-cage motor
rated voltage
380V to 12kV
power range
75 kW to 10,000 kW
Starting current
≤1.3 times rated current (wound type)2.5–3.5 times rated current (squirrel-cage type)
Startup time
10 to 120 seconds (adjustable)
environmental temperature
-25°C to +50°C
protection class
IP20 to IP54
VI. Selection and Installation Guide
1. Selection considerations
When selecting a liquid resistance starter cabinet, the following information must be provided:
Motor model, rated power, rated rotor current, rotor voltage, and rated speed
Load Characteristics Driven by Electric Motors (Operating Condition Description)
Installation environment requirements, including any special usage requirements
Cabinet surface color and other aesthetic requirements
2. Installation environmental requirements
To ensure the normal operation of the liquid resistance starter cabinet, the installation environment must meet the following requirements:
No significant shaking or impact vibrations in the surrounding area
Non-corrosive gases
Installation tilt angle shall not exceed 5°.
Areas free from fire and explosion hazards
Power Requirements: Three-phase four-wire AC 380V ±10%, 3TP3T
For special environments, such as where ambient temperatures remain below -5°C for extended periods, a heater must be installed; areas with altitudes exceeding 2000 meters require special design.。
VII. Maintenance and Troubleshooting
Maintenance of liquid resistor starter cabinets is relatively straightforward:
Regular inspectionPeriodically check whether the liquid level is within the normal range. When the liquid level falls below the marked line, add distilled water through the water inlet port after shutting down the machine and disconnecting the power supply.
Electrolyte PreparationSelect a sodium carbonate aqueous solution, adjusting the water-to-sodium carbonate ratio based on load intensity and variations in motor rotor parameters. Typically, the electrohydraulic concentration ranges from approximately 0.71% to 1.21%.
Protection Function VerificationPeriodically verify the reliability of protective functions such as liquid resistance over-temperature alarms, low liquid level, and start-up timeout.
Transmission Mechanism InspectionCheck whether the transmission mechanism operates smoothly and whether there is any sticking.
With the continuous advancement of industrial technology, liquid resistor starting cabinets will beMore industries and fieldsdemonstrate its value. ItsUnique technological advantages和Reliable performancemaking it the preferred choice in the field of starting medium-to-large motors.Ideal Choice。
For those who pursueEquipment Safety和Production is stableFor industrial enterprises, choosing liquid resistance starter cabinets is undoubtedly a wise decision.。
Simo motorsAfter-sales service policy: quality-oriented, the user first!
Sincere, intimate, and devoted, Simo will always be attentive.
preamble
Thank you for choosing Simo Motor products. As an enterprise with many years of experience in motor manufacturing, Simo Motor always insists on “Quality oriented, customer first”For the purpose, through the perfect service system, to ensure that every customer can enjoy efficient and professional after-sales service.
Our products have been awarded the honorary titles of “High Quality Products”, “China Famous Brand Products”, “National Inspection-free Products” and “China Well-known Trademark” for many times by provinces, cities and ministries. Famous Trademark" honorary title. In order to further enhance customer experience, we have formulated this after-sales service policy, aiming to provide customers with comprehensive, fast and satisfactory service guarantee.
I. Quality Assurance Commitments
Simo Motor implements comprehensive quality control in strict accordance with international standards, national standards, machinery industry standards and enterprise standards:
All products are listed in the “GB/T 19001-2008/ISO 9001:2008 quality management system”Production is carried out under effective operation to ensure that raw materials are strictly and perfectly inspected from the time they enter the factory to the time the products leave the factory.
Commitment that all products offered areNew and unusedand meets the quality requirements specified in the user's contract.
Adhere to the quality management system in accordance with “GB/T 19001-2000 idt ISO 9001:2000 standard”, and keep the quality management system running effectively.
Second, pre-sale service content
To help customers make the best choice, Simo Motors offers comprehensive pre-sales support:
Specialized technical consulting: Receive inquiries from customers about the business and technical aspects of motors, and answer all kinds of questions from customers.
Personalized Solutions: Objectively introduce the performance and characteristics of Simo's motor products and provide customized power solutions according to customer needs.
Comprehensive product information: Provide detailed quotations, drawings and motor samples and other information to help customers fully understand the characteristics of the product.
III. Ordering instructions
To ensure that the motor meets your needs, please specify the following parameters when ordering:
Basic parameters: Motor model, rated power, rated voltage, number of poles, rated frequency
Conditions of use: Altitude and working temperature of the installation site, type of load of the motor
if anyspecial requirementIf you have any questions about our products, please feel free to contact us, we need to sign another technical agreement before signing the order contract. You can also directly call our customer service hotline:15902923228 Access to professional guidance.
IV. Warranty Policy Details
1. Warranty period
Simo Motors offersNot more than two years from date of shipmentThe warranty service. Within this specified time period, if the motor is damaged or fails to function properly due to poor manufacturing quality, Simo Motors willRepairing or replacing parts or motors at no cost to the user。
2. Warranty coverage
Warranty covers product quality problems caused by our company, the company will replace the relevant parts or provide free repair.
Warranty services need to be based onProper use and normal maintenanceThe machine should be used correctly in accordance with the original operating manual and maintained, lubricated and cleaned in accordance with the original manufacturer's recommendations.
3. Non-warranty coverage
The following are not covered by the warranty:
由Non-designated maintenance staffDamage caused
Unauthorized modifications or self-disassembly
utilizationUnofficial spare parts or software
Failure to comply with operating manualsPrescribed guidelines for use, handling and maintenance
因natural disaster（Damage to products caused by wind, fire, flood, earthquake, etc.
Natural wear and tear under normal use
V. Post-warranty services
After the expiration of the warranty period, Simo motors provide continuous service support:
Reimbursable services for life: After the expiration of the warranty period, if the product malfunctions, our company implements lifelong paid service, the required wearing parts and spare parts toCost price supply。
(pay a) regular return visit: After-sales service staffFrom time to time, we will make return visits to the usersUnderstand the status of product usage and resolve potential issues in a timely manner.
Professional Repair ServiceThe company undertakes the repair of all kinds of motors, regardless of whether they are under warranty or not, and can provide professional overhaul and maintenance services.
VI. Service commitments and standards
Simo Motors is committed to “Sincerity, thoughtfulness, devotion, Simo will always be attentive.”The “Three Hearts” service concept ensures customer experience through standardized service processes:
Professional Services Team: The company has set up a specialized service team to provide installation guidance, troubleshooting and maintenance services to ensure the efficient operation of the products in the process of use.
Rapid Response Mechanism: The after-sales service team will respond promptly to customer feedback and quickly develop solutions.
Full track record: Detailed records are kept for all service sessions to ensure traceability of the service process and continuous improvement of service quality.
VII. User complaint channels
If you are not satisfied with the services provided by Simo Motors, you are welcome to provide feedback through the following channels:
direct marketingComplaints from Service Department and Headquarters
Call the customer service line:15902923228
We will take every piece of feedback seriously and continue to improve the quality of our services.
concluding remarks
Simo Motors will continue to provide customers withHigh quality products and professional after-sales serviceWe will solve your worries through a perfect service system. We firmly believe that only the success of the customer, the development of Simo. Choosing Simo motor is choosingQuality and Trust。
Simo motors--Service with heart, create the future together!
Simo motorsBrand advantage: excellent quality, leading the motor industry innovation and development
More than sixty years of professional precipitation, to create a benchmark brand in the motor industry
Brand heritage and strength
Simo Motors (former)Xi'an Electric Machinery Factory) was founded in 1955, as China's motor industryleading enterprisesThe company is one of the leading manufacturers of electric motors in the world, with more than sixty years of experience and expertise in the manufacturing of electric motors. The company has now developed intoIntegration of R&D, manufacturing and sales of motor productsOur products are widely used in many important fields such as electric power, coal, petroleum, mining, metallurgy, railroad, transportation, chemical industry, agriculture, water conservancy, aviation and so on.
Simo motors are recognized for theirDeep technical heritage和Continuous spirit of innovationThe company has established an excellent brand image in the motor industry, and its products are exported to more than 40 countries and regions such as North America, Europe, the Middle East, Southeast Asia, Africa, Australia, etc., which are trusted and highly praised by users all over the world.
Core Technology Advantage
1. Leading research and development innovation capabilities
Simo Electric always takes technological innovation as the core driving force of enterprise development:
Professional R&D Team: Has a team ofSenior engineers and technologistsThe R&D team, which is composed of a team of researchers, focuses on the cutting-edge research and application development of motor technology.
Continuous technical investment: invest an annual percentage of sales5%-7% As R&D funding to ensure continuous technological innovation and product upgrades
Patented Technology Achievements: Cumulative access toMore than a hundred national patentsA number of products have won national and provincial awards for scientific and technological progress.
Industry-University-Research Cooperation: Establishing strategic cooperative relationships with many well-known universities and scientific research institutions to jointly promote the development of motor technology.
2. Excellent product quality system
Simo Motors has established a comprehensive quality assurance system to ensure that every motor meets the highest quality standards:
International Standard Certification: Fully adoptedISO9001 Quality Management System Certification、ISO14001 Environmental Management System Certification和OHSAS18001 Occupational Health and Safety Management System Certification
Strict quality control: Implementation from raw material procurement to finished product shipment68 strict quality control proceduresEnsure zero defects in products
Advanced testing equipment: Equipped with international advancedMotor Performance Test System、Vibration Analyzer、Noise test equipmentetc., comprehensive testing of various performance indicators of the motor
Continuous Quality Improvement: Establish a perfect quality feedback mechanism, continuously optimize the production process, and improve product quality and stability.
Product Advantage Characteristics
1. Energy efficient technologies
Simo Motors actively responds to the national energy-saving and emission reduction policy and launches a series of energy-efficient products:
High Efficiency Motor Series: To meet the nationalGB18613-2020 standardEnergy efficiency rating, some products reachIE4, IE5 ultra-high efficiency level
Application of energy-saving technologies: AdoptionHigh Quality Silicon Steel Sheet、Low loss bearings、High efficiency cooling systemetc., significantly reducing operational energy consumption
Intelligent control technology: Supporting the advancedFrequency control systemThe optimal control of the motor operating state is realized, and the energy-saving effect is improved 15%-30%
2. Excellent performance
Simo Motor products are characterized byHigh reliability, long service life, low maintenance costsAnd famous:
Powerful power output: Optimized electromagnetic design solutions to ensure that the motorHigh starting torque and high overload capacity
Low vibration and low noise: AdoptionDynamic balancing process和noise reduction technologyThe vibration and noise values are better than the national standards.
Highly adaptable to the environmentProduct design takes into account all kinds of severe working conditions, withResistant to high temperature, humidity and corrosionand other properties
Long life design: The key components are made of special treatment and high quality materials, and are designed to last up to100,000 hoursthat amount or more
3. Complete product range
Simo Motors offers a comprehensive range of products to meet the needs of different customers:
High voltage motorsrange: Voltage level coverage6kV, 10kVMultiple ratings, power range200-10000kW
Low Voltage Motor Series:: IncludesYX3, YE3, YE4and other series, power range0.55-1000kW
Explosion-proof motorsrange: ByNational explosion-proof certificationFor use in flammable and explosive hazardous areas
Specialized motor series: Developed for specific industry needsSpecialized for coal mine, metallurgy, and shipsSpecialty motors
Non-standard customization capability: Strong customization and development capability, according to the customer's needsPersonalized Solutions
Service System Advantage
Simo Motor has established a comprehensive customer service system:
pre-sales technical support: Provide professional selection guidance, program design and product demonstration
Intimate service during the sale: Strict contractual performance, ensuring on-time delivery and providing installation guidance
Lifetime maintenance support: Establish customer equipment files and provide full life-cycle service support
Industry Application Advantages
Simo motors have accumulated a wealth of application experience in a number of key industries:
Power industry: Provide supporting motors for thermal power, hydropower and nuclear power, with stable and reliable operation.
coal industry: Explosion-proof motor products passed the coal mine safety certification, safety recognized by the industry
petrochemicalsCorrosion-resistant, explosion-proof special motors to adapt to the harsh working conditions and ensure safe production.
Metallurgical industry: High overload capacity, high temperature resistant motors to meet the special needs of metallurgical equipment
Transportation: Specialized motor solutions for railroads, rail transit, ports, etc.
Brand Honors and Certifications
Simo motors have won many honors for their excellent product quality and good market performance:
China Famous Brand Products、National Inspection-free Products、China Famous Trademarks
High-tech enterprises、Provincial Enterprise Technology Center
A number of products won the provincial and ministerial-level scientific and technological progress awards
Contract and Trustworthy Enterprise、Quality and reputation AAA grade enterprise
concluding remarks
Choosing Simo motors is choosingReliable quality assurance、Leading Technical Strength和Complete service supportSimo Motors is a leading manufacturer of electric motors in China. With more than sixty years of professional accumulation, Simo motors have a profound technical background and rich industry experience, and are able to provide customers in various industries with the best quality motor products and perfect power solutions.
In the future, Simo Motor will continue to uphold the "Quality-oriented, innovation-driven, customer first"business philosophy, and constantly improve the level of product technology and quality level, to create greater value for customers, and make greater contributions to the development of China's motor industry.
Simo motors - strong power, excellent energy efficiency and perfect service!
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