NX-1000-4000Q Four-channel Temperature Rise Experimental Device
The NX-1000-4000Q four-channel temperature rise test apparatus features maximum output current of 4000A for AC three-phase and 1000A for single-phase, with twelve output circuits and specially manufactured through advanced processes.
I. Main Unit Parameters and Functions
1. Main functional features
1) Equipped with a high-performance industrial PC featuring a programmable logic controller (PLC) as the central processor, it performs real-time scanning of AC signals to achieve comprehensive monitoring and closed-loop control. A password-based access management system is implemented, ensuring that only authorized personnel with corresponding operational permissions can perform specific functions. External computer control is also supported.
2) The imported PC features true-color large LCD touch screen operation with intelligent sensors supporting fieldbus technology, achieving fully digital data transmission. The display interface utilizes touch-sensitive color LCD screens (or external computers), featuring a comprehensive Chinese menu with clear and intuitive visuals for effortless operation. The system requires no external auxiliary devices during testing, offering fully automated control and user-friendly operation that ensures speed, simplicity, and convenience.
3）This instrument offers two testing methods: fully automatic testing and manual testing, requiring only simple configuration of test current and duration. It is equipped with an automatic current stabilization system.
4）Only the target current needs to be set, eliminating the need for manual monitoring. Simply configure the test parameters, current value, and step size to avoid tedious tasks such as manual voltage adjustment, manual recording, and curve plotting. This reduces labor intensity and improves work efficiency. After completion, data can be directly imported into a computer for review.
5）The system features an automatic alarm function exceeding specified thresholds, equipped with reliable self-protection against overheating, overcurrent, overvoltage, and short circuits. The AC voltage regulation device should employ dual protection mechanisms: microcomputer-based automatic protection control and mechanical micro-motion limit switches to ensure stable constant current operation, thereby enhancing product safety and reliability.
6）The software features a user-friendly interface with full Chinese operation support. The control software includes data recording capabilities, waveform storage for current and temperature measurements, along with practical functions such as data management, report generation, and printing. All parameter settings are completed within the software, enabling intuitive analysis of current-temperature relationships and clear visualization of test results. During experiments, the system automatically tracks target current values, maintains stable output current, and adjusts three-phase currents. Upon completion, it automatically resets to zero position.
7）The automatically adjustable AC constant current source complies with temperature rise tests for low-to-medium voltage switchgear assemblies (including multi-output control cabinets such as GCK and MNS) specified in GB 7251.1 to GB 7251.5 standards. It must support parallel operation of multiple constant current power supplies during temperature rise tests. Users must provide supporting documentation, such as test reports from GCK or MNS systems, to verify this capability.
8）Equipped with a three-phase automatic balancing system to ensure balanced three-phase output, the output current sampling utilizes a 0.05-class current transformer combined with cutting-edge power electronics technology, featuring strong anti-interference capability and high output accuracy, with a maximum precision reaching Class 0.2.
9） Equipped with a precision adjustment menu, users can manually adjust error values. The programmable AC constant current power supply enables fully intelligent calibration, automatically generating multi-stage correction coefficients within the adjustable range of the device to ensure stable current output precision.
10) Test modules can be customized according to user requirements, with lifetime free software upgrades.
11）three-phase power compensation
12)In accordance with the requirements of ISO 17025 Laboratory Management System regarding personnel, machinery, materials, supplies, and environment, the laboratory possesses the following management functions: Equipment login requires the input of a username and password, and new personnel must be established and authorized by the administrator. (Computer software functionality)
II.Whole Machine Parameters
NX-1000-4000Q-Four-channel-Temperature-Rise-Experimental-Device | ||
*High current output | Six channels of exchange, eighteen phases | |
Circuit method | Automatic Pressure Regulation Method for Special Processes | |
AC input | phase line | 3Φ4W +G |
Voltage | 380V±10%，50Hz±2%Three-phase four-wire | |
input currenton | 84A | |
output | Phase line | 3Φ4W |
Voltage | 0-10V | |
Output current combination | 12-phase AC, continuously adjustable range 0-1000A, parallel connection capacity 4000A | |
Capacity | 8kVA *12 | |
Current stability accuracy | output(current)≤±0.5% | |
leading-out terminal | Copper busbars, copper columns, terminals (custom-made) | |
Protect | The electronic circuit rapidly detects overvoltage, overcurrent, overheating, phase loss, and other conditions to activate automatic trip protection and warning devices. The voltage and current are zero in non-test states. | |
Accuracy | Source effect | ≤0.3%rated value |
Temporal Drift | ≤1%rated value | |
Temperature drift | ≤0.04%rated value／℃ | |
load effect | ≤1%rated value（The rate of change in output voltage caused solely by the variation of output current from zero to rated value） | |
Ripple voltage | ≤1%rated value+10mV | |
其他 | Line Regulation： | 0.1% |
Load Regulation： | 0.1% | |
Display and Set | Auxiliary voltage meter display | True color liquid crystal display and digital instrument (display accuracy: 0.1V, display error: ≤0.2% ± 1 digit) |
auxiliary current meter display | True color liquid crystal display and digital instrument (5-digit digital display, display accuracy 0.1A, display error: ≤0.2% ± 1 digit) | |
Adjust settings | Automatic Regulation of Current PLC High-Speed Channel | |
System | overall efficiency | ≥90% |
Dielectric insulation impedance | AC 1800V for 1 minute, 20 megohms | |
cooling equipment | Natural cooling | |
Noise | ﹤60dB（1 mm in front of the machine） | |
Transformer Accuracy | 0.2级 | |
levels of protection | IP20 | |
working condition | working | Long-term temperature rise test |
Temperature | -10℃-50℃ | |
Humidity | 0-90% (non-condensed state) | |
Altitude | below 1500 meters | |
Appearance | Paper mulberry | polymerization |
| Size | Depending on the requirement, integrated or split |
| Weight | Depending on the requirement, integrated or split |
| Output | Export by square meter according to national standard |
independent temperature inspection | Temperature Test | Inspection within the range of 0 to 400 degrees |
| Temperature inspection for Route 80 (customizable according to requirements) | |
Function | Generate temperature rise curves and save them automatically | |
Resolution | 0.1degree | |
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3.Sampling section
The use of high-precision 0.05-class current transformers ensures high-accuracy performance in current model sampling.
4. The display section utilizes a 0.1-grade high-precision 24-bit analog-to-digital (AD) design to create a high-precision measurement module.
5. Alarm functions include overcurrent alarm and upper/lower limit value alarms.
6. Time-controlled output: To ensure stable instrument operation in this experiment, a time-controlled output function is integrated. Alarm types: overcurrent alarm, upper/lower limit value alarm, overcurrent relay, overvoltage relay, and overheating alarm.
Output timing control: To ensure proper operation of the equipment in this experiment, the PLC with time-controlled output function is Siemens, and the touch screen is from Taiwan's Weilun.
Increase capacitor compensation to improve power factor
7. The features of the new temperature inspection instrument are somewhat
The independently developed temperature inspection instrument is integrated into the entire temperature rise system, adopting a modular design with one module per 8 channels and plug-and-play functionality for customized solutions based on client requirements. Specifically engineered for high-current temperature measurement applications, this product delivers distinct advantages including exceptional measurement accuracy and immunity to electromagnetic interference. Compared to temperature modules used by competitors, it offers significant advantages: Most market-available temperature inspection modules and software solutions are externally sourced, making customization and tailored design challenging. Standardized approaches and functionalities are often adopted, which creates vulnerabilities in after-sales support when equipment malfunctions occur – as maintenance services typically rely on third-party component suppliers.
Our company utilizes a temperature inspection instrument independently designed and developed (equipped with a high-precision 24-bit AD chip from American Meixin Corporation). Upon customer request, we can customize solutions with precision. Any technical issues are promptly addressed, including immediate provision of spare parts to ensure uninterrupted production schedules.