Inverter cabinet:

The frequency converter cabinet is equipped with a dedicated full digital frequency converter for elevators, which is the core center of the speed control system and controls the frequency control speed based on the PLC analog output signal.

——Including incoming reactance to suppress current surge;

——The input reactor can significantly reduce the harmonic current generated by the frequency converter;

——Using a frequency converter as a digital speed control device for the hoist, achieving stepless speed regulation and truly achieving stable speed operation;

——High precision direct torque control and vector control ensure precise motor control;

——The elimination of rotor resistance significantly reduces energy consumption, saves operating costs, and also reduces floor space;

——Has strong anti-interference ability, strong environmental adaptability, small harmonic components, and is pollution-free to the power grid;

——Adopting variable frequency vector control technology, the actual speed closely follows the predetermined speed change, and the smoothness of the transition from the constant speed section to the deceleration section and from the deceleration section to the crawling section is good, with excellent speed regulation performance;

——Has good stall characteristics, the stall current can be set arbitrarily, and the actual current value will not exceed the set value.

install

The user is responsible for this renovation installation, and the supplier provides free guidance for installation.

1.1. Technical Services

Including guidance on installation and debugging services. Provide 3 years of remote diagnostic service traffic.

2. Equipment manufacturing and inspection

The electrical control system has strict inspection standards throughout the entire production process, ensuring that first-class work quality is used to produce products that satisfy users and provide satisfactory services. This includes the incoming inspection, process inspection, assembly inspection, power on testing, system factory inspection, system factory debugging, and inspection of product appearance, packaging, and labeling involved in the production process of electrical control systems.

3. Technical data, technical services, and quality commitments

3.1. Technical Information

The supplier shall provide the following information:

1) Detailed technical parameters of the equipment;

2) Equipment external dimension diagram and equipment foundation diagram;

3) The schematic diagram, secondary wiring diagram, and terminal block wiring diagram of the control system.

4) And relevant technical details should be communicated with the design unit in a timely manner.

The supplier is required to provide the following necessary drawing materials (electronic and paper versions). The drawings and data content, model specifications, and performance parameters that meet the requirements of engineering construction drawing design. Specifications and main technical parameters of supporting accessories.

3.2. Technical Services

1) Free on-site installation guidance for the provided equipment;

2) Collaborate with the construction unit of the user to jointly complete the debugging and trial operation of the equipment, and provide a debugging report.

3) Promise to provide users with various spare parts and accessories at favorable prices for a long time;

4) During the quality assurance period of the equipment, if there is a malfunction caused by the selection and manufacturing of the equipment, the equipment supplier shall send technical personnel to the site to handle it within 24 hours after receiving written notice from the user;

5) The equipment is free of charge for one year, and spare parts damaged by non-human accidents are replaced free of charge within one year;

6) The equipment supplier dispatches specialized technical personnel to provide training to the actual operators of the user, including the system composition, operating principle, use, operation, maintenance, and common troubleshooting of the equipment.

The second party of the equipment shall provide professional training to the operators, with the goal of enabling them to operate independently. The training targets mainly frontline production personnel, including equipment operators, maintenance personnel, and management technicians. The training content should include but not be limited to the following:

① Equipment theoretical training; ② Equipment construction training; ③ Maintenance training; ④ Operation training.

7) During the installation, debugging, and (trial) production operation of the equipment, Party A shall supervise and inspect the installation situation, and Party B shall be responsible for rectifying any design defects, safety hazards, and occupational health issues found during the acceptance inspection of the equipment.

3.3. Quality commitment

1) Design and manufacturing should comply with the latest national or industry standards and specifications:

2) The manufacturer shall conduct tests and inspections on the materials, connections, assembly, process, overall and functional aspects of the equipment during the manufacturing process to ensure full compliance with the technical specifications and confirmed design drawings.

3) The supplier shall provide product qualification certificates and electrical test reports.

4. Warranty period and after-sales service commitment

The quality assurance period is twelve months after the final acceptance of the equipment. During the warranty period, the seller guarantees the normal operation of the equipment. If it fails to meet the requirements, the warranty period shall be extended. For maintenance services during the warranty period, the seller shall arrive at the site within 24 hours after the buyer's notification and be responsible for debugging or replacing damaged parts of the equipment free of charge. For maintenance services after the warranty period, the seller shall arrive at the site within 48 hours after the buyer's notification to repair the equipment and replace damaged parts.

5. Implementing standards and regulations

Design basis and meet the requirements of listed national standards, industry standards, and policy documents.

1) The latest version of the Coal Mine Safety Regulations

2) The latest version of the Safety Regulations for Metal and Non Metal Mines

3) GB/T 20961-2018 Single rope winding mine hoist

4) GB/T 10599-2010 Multi rope friction hoist

5) GB20181-2006 Safety Requirements for Mine Hoists and Mine Winches

6) GB/T 3797-2016 Electrical Control Equipment

7) GB 50070-2020 "Design Standards for Mining Electricity"

8) GB 50054-2011 "Design Code for Low Voltage Distribution"

9) GB/T 17626 Electromagnetic Compatibility Testing and Measurement Techniques

10) GB/T 50062-2008 "Design Specification for Relay Protection and Automatic Devices of Power Equipment"

11) GB 50055-2011 "Design Code for Distribution of General Electric Equipment"

12) GB 50215-2015 "Design Code for Coal Industry Mines";

13) YS 5030-1996 "Code for Design of Electric Power in Nonferrous Metal Mines"

14) GB/T 4208-2017 "Degrees of Protection Provided by Enclosures (IP Code)"

15) GB/T 51065-2014 "Design Specification for Coal Mine Hoisting System Engineering"

16) GB/T 14549-1993 "Quality of Electric Energy - Harmonics in Public Power Grids"

17) GB/T 5226.1-2019 "Mechanical and Electrical Safety - Electrical Equipment of Machinery - Part 1: General Technical Conditions"

18) GB/T 18216.4-2012 "Test, measurement or monitoring equipment for electrical safety protection measures of low-voltage distribution systems below 1000V AC and 1500V DC - Part 4: Grounding resistance and equipotential grounding resistance"

19) GB/T 50065-2011 "Design Specification for Grounding of AC Electrical Equipment"

20) GB/T 3906-2020 "3.6 kV~40.5 kV AC Metal Enclosed Switchgear and Control Equipment"

21) GB 14048.1-2012 "Low voltage switchgear and control equipment - Part 1: General principles"

22) GB/T 50093-2013 "Code for Construction and Quality Acceptance of Automation Instrument Engineering"

23) GB/T 191-2008 "Pictorial Symbols for Packaging, Storage and Transportation"

24) GB/T 13306-2011 "Signage"

GB/T 13384-2008 General Technical Conditions for Packaging of Mechanical and Electrical Products

GB 12348-2008 Emission Standards for Industrial Enterprise Boundary Environmental Noise

27) GB 50169-2016 "Code for Construction and Acceptance of Grounding Devices in Electrical Installation Engineering"

28) JB/T 4263-2020 Technical Conditions for Mechanical and Electrical Control Equipment of AC Transmission Mine Hoists

29) AQ 2020-2008 "Specification for Safety Testing and Inspection of Spiral Wound Hoists in Use in Metal and Non Metal Mines"

30) GB 50171-2012 "Code for Construction and Acceptance of Electrical Installation Engineering Panel, Cabinet and Secondary Circuit Wiring"

31) GB50254-2014 "Code for Construction and Acceptance of Low Voltage Electrical Appliances in Electrical Equipment Installation Engineering"

32) GB/T 2423.1-2008 "Environmental testing for electrical and electronic products - Part 2: Test methods - Test A: Low temperature"

33) GB/T 2423.2-2008 "Environmental testing for electrical and electronic products - Part 2: Test methods - Test B: High temperature"

34) GB/T 12668.2-2002 "Variable speed electrical drive systems - Part 2: General requirements - Rating of low-voltage AC variable frequency electrical drive systems"

35) GB/T 11022-2020 "Common technical requirements for high-voltage AC switchgear and control equipment standards"

36) GB/T 3766 "General rules and safety requirements for hydraulic transmission systems and their components"

37) GB/T13926 "Electromagnetic Compatibility of Industrial Process Measurement and Control Devices"

38) Electrical equipment shall comply with the International Electrotechnical Commission IEC standards, current National Electrotechnical Commission and other relevant standards.

The static and dynamic performance indicators of the electronic control device fully meet the requirements of the four quadrant operating conditions of the hoist. Within the range of+15% voltage fluctuation in the power grid, it can achieve constant torque improvement and meet certain overload capacity and safety factors.

40) The electrical control device can withstand the floor vibration during the operation of the hoist and ventilation fan.

41) Key circuits such as safety circuits and safety monitoring are designed with redundant structures.

42) The electronic control system adopts original imported dual PLC control, and key components such as power devices and programmable controllers are imported products.