Product Features ◆ Basic Composition of the Mining-Specific Multifunctional Console System
The system consists of test power supply, power switch cabinets, signal sensing devices and power measurement equipment, automated test measurement units, control consoles, AC motor test software systems, database systems, and other components. The load equipment for type tests can be selected according to user requirements, including companion motors (such as DC generators, AC generators, wound-rotor motors), eddy current dynamometers, magnetic powder dynamometers, magnetic powder brakes, and other devices, to meet the type test needs of different motors.
◆ Measurement Method: Microcomputer-based Measurement
The measurement cabinet is equipped with current and voltage sensors, and the intermediate stage uses signal conditioning interface modules. The computer completes signal acquisition and measurement tasks.
◆ Control Method: Direct Control Using Automotive-Grade MCU
An automotive-grade microcontroller from Siemens (Germany) is used for interlock control. The interlock program can be customized and modified according to user requirements. The control system has stable performance and good scalability.
◆ Operation Mode: Coexistence of Manual and Automatic Operation
To avoid affecting test work during microcomputer failures, both manual control (panel button operation) and automatic control (computer keyboard/mouse operation) are adopted. If automatic control is inconvenient or the microcomputer fails, tests can be conducted manually.
◆ Test Data Processing: Test Results Saved in Industrial Computer or Server
The mining-specific multifunctional console is equipped with original industrial computers from well-known domestic and international brands. The data from automatic tests is directly saved on the hard drive of the test industrial computer. Manually measured data can be entered into the test software interface and then saved in memory. It provides local database functionality, allowing local query and access of test data. It also features automatic generation of test reports and provides output and printing functions (equipped with a Hewlett-Packard multifunction laser printer).
Technical Parameters ◆ Design Principles
The design principles are reliability, safety, economy, practicality, operability, and maintainability, while also considering advanced technology.
◆ Applicable Scope
It meets the requirements for rated voltages of 380V, 660V, 1140V, 3300V, 6000V, and 10000V; rated power from 1 to 15000kW, for factory and maintenance tests of three-phase asynchronous motors.
◆ Operating Conditions
◇ The rated working temperature of the central control room is +20°C, with an allowable variation range of 0°C to 45°C, and relative air humidity not exceeding 85%.
◇ The central control room should be away from electromagnetic field interference and mechanical vibration, and avoid corrosion from corrosive gases.
◇ The ambient temperature for the cabinet area and equipment area is -5°C to +45°C, with relative air humidity not exceeding 80% at +40°C and not exceeding 85% at +25°C.
◇ The air must not contain excessive dust, acids, salts, corrosive, or explosive gases.
◇ Installation altitude should not exceed 1000m.
◆ Test Items
Users can select the following test items according to their own requirements:
◇ Ambient temperature measurement
◇ Insulation resistance measurement
◇ DC resistance measurement (calculating three-phase resistance unbalance)
◇ Power frequency withstand voltage test
◇ Turn-to-turn withstand voltage test
◇ No-load test (calculating three-phase current unbalance)
◇ Locked-rotor test
◇ Load test
◇ Efficiency test
◇ Temperature rise test.
The system completes measurement and calculation of voltage, current, power factor, active power, reactive power, efficiency, frequency, output torque, output speed, output power, temperature rise, etc.
◆ Main Technical Parameters:
◇ No-load, locked-rotor, load test, temperature rise:
Current measurement accuracy: 0.2%FS±3d
Voltage measurement accuracy: 0.2%FS±3d
Power measurement accuracy: 0.5%FS±3d
Current unbalance calculation: 0.1%FS±3d
Temperature measurement accuracy: 0.5%±2d
Speed measurement accuracy: 0.2%FS±3d
Torque measurement accuracy: 0.2%FS±3d
◇ Power frequency withstand voltage test:
High voltage: 0～30000V adjustable
High current: 0～3000mA
Withstand time: 0～9999s
◇ Turn-to-turn impulse withstand voltage test:
Voltage peak: < 30000V, adjustable
Wavefront time: < 0.5μs, adjustable
◇ Insulation resistance measurement
Measurement range: < 1000MΩ
Measurement accuracy: 5%FS±5d
◇ DC resistance measurement:
Measurement current: < 10A
Measurement resistance: 0～200Ω
Minimum resolution: 1μΩ
Resistance unbalance calculation: 0.1%FS±3d
