ZNCK-6A Mining Microcomputer Comprehensive Protection Device;
(Hereinafter referred to as the device) is a product developed and produced specifically for the monitoring and protection of high-voltage switches in coal mines, based on absorbing advanced technology at home and abroad and according to the needs of mining power systems. It is suitable for systems with neutral point ungrounded or grounded via arc suppression coil in underground 10kV, 6kV, and 3.3kV power grids. The device integrates functions such as protection, measurement, control, monitoring, communication, fault recording, and event recording. It can form a coal mine power grid monitoring and control system together with SCADA, and can timely send electrical parameters, operating parameters, power information, equipment conditions, fault information, and fault recording data of underground electrical equipment to the dispatch center, and can also receive remote control and setting commands from the dispatch center to achieve remote operation.
The device has rigorous design, reliable component selection, excellent production technology, and special treatment, with significant advantages in vibration resistance, anti-interference, corrosion resistance, stability, and low power consumption. It can be installed in BGP and PBG series mining flameproof high-voltage switchgear, and can replace traditional various types of analog devices and digital display protection devices, and can also realize the renovation of old power distribution devices. It is an ideal choice for old station renovation and new equipment. In underground environments, the device must be placed in a flameproof cavity, among which RS485 signal and cable insulation resistance detection output are intrinsically safe outputs. The explosion-proof mark is: [Exib]I, and the explosion-proof certificate number is: 2084252U.
Protector Features
1. Adopts high-performance 32-bit DSP and high-performance MCU, giving the device strong real-time performance and reliability.
2. The sampling density of 64 points per cycle and frequency synchronization tracking technology give the device high protection and measurement accuracy.
3. High-reliability high-speed memory is used for storing setting parameters, protection settings, and event records; large-capacity memory is used for recording fault recording data. All data is not lost after power failure, supports unlimited erasing and writing, and the electric energy is written in real time (interval 1s), ensuring that the device's electric energy will not lose partial information due to sudden power failure.
4. The device adopts an ultra-thin chassis with a simple and compact mechanical structure, and its size is one-third or even half smaller than similar products. It can adapt to various installation methods and is reliable.
5. All inputs and outputs of the device are electrically isolated (including insulation resistance monitoring), the bus does not go out of the chip, and the electromagnetic compatibility is good.
6. Adopts a large-screen high-brightness LCD, full Chinese display, large information content, simple and convenient operation, and with the intelligent wireless remote controller, operators can realize various operations and setting adjustments of the switch without power failure underground.
7. The intelligent power supply directly powered by PT can ensure that the device operates reliably after power loss and uploads fault information to the ground monitoring center. The low power consumption characteristic can reduce the impact of the device power supply on PT.
8. Complete hardware self-detection and online detection functions improve protection reliability.
9. There are no adjustable components inside the device, which not only ensures product consistency, interchangeability, and reliability, but also facilitates user use.
TLHG-2013 Insulating Oil Dielectric Strength Tester;
The TLHG-2013 insulating oil dielectric strength tester truly realizes the full automation of insulating oil dielectric strength measurement, making the originally cumbersome and dangerous work simple. The fully automatic oil tester has simple operation and high automation (just press one button); clear menu, simple and clear parameter input; can store 99 groups of oil sample test data for easy later viewing and printing; the system clock can continue to run even when the power is off; the internal time of this system is... The TLHG-2016 insulating oil dielectric strength tester adopts microcomputer control, fully automated mechanical and electrical integration, high test accuracy, and overcomes the problem of similar instruments being easily broken down by high voltage. It has functions such as automatic detection, automatic stirring, automatic processing, automatic printing, data storage, and perpetual calendar, and also has advantages such as mechanical and electrical interlock protection and grounding protection. In order to meet the rapid development needs of the power industry, the TLHG-2016 insulating oil dielectric strength tester we developed is based on the national standard GB/T507-2002 "Insulating Oil Breakdown Voltage Determination Method", the industry standard DL429.9-91, and the latest power industry standard DL/T846.7-200.
The measurement resistance range can reach 0~200G, and the resistance range can be automatically converted with corresponding indication. The insulation resistance value is displayed synchronously in two ways. The mechanical pointer adopts ultra-thin tension wire structure with strong seismic resistance. The use of mechanical pointer makes it easy to observe the change range of insulation resistance, and the dot matrix LCD screen can guide users to operate the instrument and obtain measurement results. The mechanical meter head and LCD screen are combined into one. Dual scale display, automatic range conversion. Colored scale is easy to read, and LED displays corresponding colors. It adopts embedded industrial single-chip microcomputer and real-time operating system. High automation, strong anti-interference ability, the instrument can automatically calculate absorption ratio and polarization index without manual intervention. The operation interface is friendly, and various measurement results have power-off protection function, which can continuously store 20 measurement results. Built-in residual high-voltage discharge circuit, after the test, the residual high voltage on the tested equipment can be automatically discharged. AC/DC dual use. Equipped with rechargeable battery and AC adapter.
Reliable and pollution-free. The whole machine is controlled by microprocessor, with LCD display and Chinese menu. The appearance design is novel, small size, light weight, and easy to move. After setting various discharge parameters, the entire constant current discharge process is automatically completed. Realize intelligence. Make the entire discharge process safer. The intelligent discharge monitor series portable and intelligent design makes the discharge test work simple and easy, greatly reducing the labor intensity of personnel, and also improving the scientificity and intelligence of discharge testing. The discharge monitor product features use PTC ceramic resistors to avoid red heat phenomenon, making the entire discharge process safer. The equipment is easy to install, debug, and maintain. The front and rear of each acquisition module are isolated, with high safety and reliability. Equipped with a PC monitoring system, it can monitor the entire discharge process in real time, analyze the monitored total voltage, discharge current, and individual battery voltage data, and generate corresponding data reports. Function: The wireless acquisition box, discharge host, and PC machine are connected in a simplified way.
And testing of railway, airport signal control cables, and street lamp cable faults. Product features: high-precision standard measurement, light beam oscilloscope, strong comprehensive ability, perfect human-machine comprehensive ability, massive storage, powerful data processing management, high-speed printing, intuitive and fast output results, anti-interference design, wide power supply working range, compact structure, easy to carry and field measurement. Related introduction: The cable fault tester is a comprehensive cable fault detection instrument. It can comprehensively test high-resistance flashover faults, high and low resistance grounding, short circuits, cable breaks, poor insulation and other faults. If equipped with an acoustic ranging device, it can also accurately determine the location of the fault point. It can test various faults of power cables of different voltage levels, different cross-sections, different media, and various materials, including open circuit, short circuit, low resistance, high resistance leakage, and high resistance flashover faults. Display method: 12.1-inch industrial LCD screen (XP operating platform). Storage method: fixed and mobile two ways 4G/2G. Test methods: low-voltage pulse method, impulse current method, direct flash current method. Operation method: touch mouse operation. Test distance: not less than 40km. Shortest test distance (blind zone): 5-10 meters. Fixed point error: 0.2m. Test error: system error less than 1%. Resolution: V/50.
And designed and manufactured based on the general requirements of users. It has the characteristics of high test accuracy, convenient operation, and safety. In power systems, factories, mines, and enterprises, there are a large number of electrical equipment. Their internal insulation is mostly oil-immersed insulation. The dielectric strength test of insulating oil is a routine test item that must be tested. Product features: three oil cup structure, microcomputer control, can automatically complete boosting, holding, reducing, stirring, static placement, display calculation, printing and a series of operations, and can perform insulating oil withstand voltage test in the range of 0-80KV. Adopts large-screen dot matrix LCD display with internal backlight system, which can be clearly seen even at night. The test process is prompted by Chinese menu, which is convenient for test personnel to operate. This instrument is simple to operate. The operator only needs to input simple instructions according to the instructions, and the instrument will automatically complete the withstand voltage test of insulating oil according to the settings. Each breakdown voltage value will be automatically stored. After the test is completed, the breakdown voltage values and average can be printed or stored.
The test results can be printed directly. The circuit breaker dynamic characteristic analyzer has the advantages of intelligence, multiple functions, accurate data, strong anti-interference, simple operation, small size, light weight, and beautiful appearance. Switch characteristic tester product features: Switch characteristic tester performance time: inherent opening and closing time of 12 breakpoints. Same-phase synchronization, inter-phase synchronization. Reclosing: closing-opening, opening-closing, opening-closing-opening process time of each breakpoint: first opening time, first closing time, second closing time, metal short time, no-current time value. Bounce: closing bounce time of each breakpoint, bounce times, bounce process, bounce waveform; opening rebound amplitude of each breakpoint. Speed: just opening, just closing speed, average speed, time-travel characteristic curve. Travel: total travel, opening distance, overtravel, overshoot travel, rebound amplitude. Current: opening and closing coil current values, current waveform diagram. Switch characteristic tester features: suitable for mechanical characteristic testing of various types of SF6 switches, GIS combined electrical appliances, vacuum switches, and oil switches.
If equipped with acoustic ranging device, it can accurately determine the location of the fault. High test accuracy: the instrument adopts high-speed data sampling, A/D sampling speed is 100MHz, so the instrument reading resolution is 1m, and the detection blind zone is 1m. High intelligence: test results are automatically displayed on the large-screen LCD in the form of waveforms and data, making fault judgment intuitive. And it is equipped with full Chinese menu display operation function, no special training for operators. It has waveform and parameter storage and recall functions, using non-volatile components, after shutdown, waveforms and data are not lost. It has dual-trace display function. The test waveform of the faulty cable can be compared with the normal waveform, which is conducive to further judgment of the fault. It has waveform expansion ratio function. Changing the waveform ratio can expand the waveform for testing. The position of the dual cursor can be arbitrarily changed to directly display the direct distance or relative distance between the fault point and the test point. Test distance: single-end test distance 20 kilometers. Shortest test distance (blind zone): less than V/15 (meters), where V is the propagation speed of the electric wave in the tested cable. Test error: relative error: 2%; absolute error: within 15 meters for fault points within 1 kilometer, within 20 meters for fault points over 1 kilometer. Fault fixed point error: 0.5 meters. Reading resolution: V/60 meters, where V is the propagation speed of the electric wave in the tested cable.
Isolated from high voltage, with the characteristics of protecting the host and operators. The TLHG-701 cable fault detector is suitable for testing various types of power cables and communication cables with different voltage levels. The TLHG-701 cable fault tester adopts multiple fault detection methods, uses the latest advanced electronic achievements and devices, adopts computer and special electronic technology, and is a high-tech, intelligent, fully functional new product launched with long-term successful experience in developing cable testers. The TLHG-701 cable fault tester is a comprehensive cable fault detection instrument that can test high-resistance flashover faults, high and low resistance grounding, short circuits, cable breaks, poor insulation and other faults. Equipped with an acoustic ranging device, it can accurately determine the location of the fault point. Product features: complete functions: test faults quickly, accurately. The instrument uses low-voltage pulse method and high-voltage flashover method to detect, and can test various faults of cables. Especially for cable flashover and high-resistance faults, it can be directly tested without burning through.
TLHG-860 Microcomputer Relay Protection Tester;
The TLHG-860 microcomputer relay protection tester is a new type of miniaturized microcomputer relay protection tester that is designed and manufactured on the basis of referring to the power industry standard "Conditions for Microcomputer Type Test Devices for Relay Protection" (DL/T624─1997), extensively listening to user opinions, summarizing the advantages and disadvantages of similar domestic products, and fully using modern microelectronics and devices. The TLHG-860 microcomputer relay protection tester can be operated standalone or connected to other computers. The host has a built-in high-performance industrial computer and high-speed digital signal processor, true 16-bit DAC module, new modular high-fidelity high-power amplifier, with built-in TFT true color LCD display and embedded microcomputer keyboard. The TLHG-860 microcomputer relay protection tester can be operated standalone or connected to a computer. It has powerful operation functions, small size, and high precision. This microcomputer relay protection tester has both the superior performance and comprehensive functions of large testers, and the compactness, flexibility, simple operation, and high reliability of small testers.
TLHG-9001 Mining Switch Plug-in Protection Performance Intelligent Test Bench;
The TLHG-9001 mining switch plug-in protection performance intelligent test bench can be designed and added with test interfaces for other protection plug-ins according to user requirements, to complete the testing of overload, short circuit, phase loss, leakage and other protection performance parameters of all plug-ins. It can also meet the three-phase synchronous test of electromagnetic starters and feeder switches, the vacuum degree test of switch tubes, and the action characteristic test of contactors. The computer automatically collects data and prints out test reports. The TLHG-9001 mining switch plug-in protection performance intelligent test bench is suitable for relay protection plug-ins, vacuum feeder protection plug-ins, vacuum electromagnetic starter protectors of various types and manufacturers of high-voltage power distribution devices. Electric drill comprehensive protection plug-ins, lighting signal comprehensive protection plug-ins. Switch plug-in protection performance intelligent test bench product features: Features and configuration description: Computer operation and manual operation test methods coexist, convenient for staff to debug and detect plug-ins. The test circuit simulates the working state of underground switches. Must be tested item by item according to regulations.
Relay protection tester product parameters: Current output: AC phase current output (effective value), three-phase parallel current output (effective value), phase current long-term allowable working value (effective value), phase current output power, output power when three-phase parallel current output, allowable working time when three-phase parallel current output, range (fundamental wave). TLHG-502 single-phase relay protection tester adopts double carbon brush voltage regulator (i.e., double-sided voltage regulator), large knob to adjust heavy AC/DC voltage and current, small
