-
Anonymous users2024-02-07This test module can be used for automatic or manual testing of AC voltage, current and power relays and various protection devices. It can also be used for automatic or manual testing of various DC voltage and DC current relays.
The program is a general-purpose testing module and is the most powerful of all programs. The amplitude, phase and frequency of voltage and current of each phase can be set by yourself. And can be arbitrarily changed according to the set time according to their respective step lengths, so as to carry out arbitrary tests on various relays and protection devices.
Measurement of operation value, return value, operation time, etc. The test interface is shown in the figure above
The initial value of the voltage is 5A, the phase difference is 120°, and the frequency is 50Hz. DC variable no flag: If you select " " in the DC column, it means that the phase outputs DC. If you select " " in the variable no column, the parameter will participate in the change, and if you do not select it, it will be fixed.
Automatic test: When the program outputs, the amount involved in the change will automatically change according to the set step size and interval time, and the other quantity values will be fixed. The relay action stops the output and the program returns automatically.
Manual Experiment: The program continuously outputs the current value, and when the "Increase" button is pressed, the variable amount is increased by one step, and when the "Decrease" button is pressed, the variable amount is reduced by one step. If the relay moves, the action value and action time can be recorded, at this time, the tester does not stop the output, the operator can change the parameters in the opposite direction until the relay returns, and the return value and return time are recorded.
So manual experimentation can be used to make return values.
Test Interval: The interval between each step change during the automatic test. Open parameters, save parameters, recover data, the data set on the interface, you can use "save parameters" to save in the hard disk file, and later you can use "open parameters" to call up, the data on the interface is changed after increasing or decreasing during the test, and you can use "restore parameters" to restore the data to the initial value.
During the test, the computer automatically calculates and displays the line voltage, negative sequence voltage, zero sequence voltage and other data, and displays the vector diagram of the current and voltage of each phase. Vector graphics can be zoomed in and out with a "magnifying glass". Sensitivity. The ability to reflect a fault, usually expressed as a sensitivity factor.
Reliability. At the time of this action, no rejection action occurs.
Rapidity. Faults or anomalies can be eliminated in the shortest possible time.
Selectivity. Faults are removed in the smallest possible interval to ensure maximum continued power supply to the fault-free section. When choosing a relay protection scheme, in addition to the above four basic performances, you should also pay attention to its economy.
That is, not only the investment and operation and maintenance costs of the protection device must be considered, but also the losses caused by the rejection or misoperation of the device due to the imperfection of the device to the national economic and social life.
-
Anonymous users2024-02-06Microcomputer relay protection has been widely used in various fields such as line protection, main transformer differential protection, excitation control, etc. Integrated automation of substations has become mainstream. Relay protection tester is an important test tool to ensure the safe and reliable operation of the power system.
With the rapid development of computer technology, microelectronics technology and power electronics technology, it is an inevitable trend of technological progress to continuously introduce new high-performance relay protection test devices by applying the latest technological achievements. Microcomputer relay protection tester is called: microcomputer relay protection calibrator, microcomputer relay protection tester, relay protection tester, three successive current protection tester, relay protection tester, three successive protection tester, three successive protection calibrator, relay protection calibrator, three successive protection calibrator, relay protection instrument, relay protection instrument.
1. Intelligent host, the host is controlled by DSP chip, 16-bit DAC output, and can produce 2000 high-density sine waves per week for the base, which is the highest level in the domestic tester. The waveform quality is greatly improved and the accuracy of the tester is improved.
2. The stand-alone machine runs independently, and the device is operated by rotating the mouse through the large-screen LCD screen.
3. Connect to the computer to run, connect to the machine to print the report, etc.
4. "Fool-style" operation, using advanced "photoelectric rotating mouse" controller, eliminating complex keyboard operation, no need for computer knowledge to operate, simple and easy to learn.
5. Modular design, all plug-ins are completely independent of each other, and only need to change plug-ins to realize hardware maintenance and upgrade.
6. Because it is a six-phase current and a six-phase voltage output, it is convenient to test the standby self-loading setting and the microcomputer differential protection device, which makes the test very perfect.
7. Stand-alone independent operation, built-in high-performance industrial computer, living frequency 300 600MHz, 128M memory, 12G hard disk, running Windows XP operating system, panel equipped with high-grade stainless steel keyboard, trackball mouse inch TFT true color LCD display.
8. Six-phase current and six-phase voltage are output at the same time.
9. It is convenient to test the standby self-throwing device and the microcomputer differential protection device.
10. It can verify various relays, protection and safety automatic devices in the field, and can simulate various complex transient, permanent and conversion faults for the whole group of tests. It can save test data in real time, display vector diagrams, draw various characteristic curves, print reports online, etc.
11. The interface is connected to the PC, without any adapter wire, and it is easy to use.
13. The whole machine adopts switching power supply and switching amplifier technology.
14. Modular design, all plug-ins are completely independent of each other, and only need to replace plug-ins to achieve hardware maintenance and upgrade.
15. Arbitrary configuration, such as 6-phase current, 5-phase voltage + 2-phase current, etc.
16. The user can calibrate the accuracy of the tester through the software.
17. The fault recording data in comtrade format can be played back.
18. According to international standards, the power factor correction circuit of the power supply is designed, so that the efficiency of the device is as high as 95%.
-
Anonymous users2024-02-05Six successive electric protection white protection tester is in the past ten years
A new type of intelligent test instrument has been developed in the past.
The capacity is a combination of a voltage regulator and a phase shifter, which is bulky and heavy, and the accuracy is not high, which can no longer meet the calibration work of modern microcomputer relay protection.
SX-6600 Relay Protection Tester.
Modern microcomputer relay protection tester can be divided into two forms, one is the use of traditional OCL power amplifier, large volume, weight of about 25kg, relatively bulky, power amplifier tube works in the amplification area, long time is easy to damage, and the dynamic range is narrow, the accuracy is not high. The other is the use of switching power supply, the power amplifier adopts digital power amplifier, small size, light weight, high efficiency, is the development direction of relay protection tester. SX-6600 relay protection tester is a new type of miniaturized microcomputer relay protection tester based on summarizing the advantages and disadvantages of similar products at home and abroad, widely listening to user opinions, making full use of modern microelectronics and power electronics technology, it adopts the internationally popular DSP and switching amplifier technology, and the stand-alone independent operation function has been very powerful, coupled with PC software, so that it can be connected to the computer to run, the function is icing on the cake, and its volume and weight are only half of the traditional tester, The advanced design concept makes the tester reach the international advanced level.
-
Anonymous users2024-02-04The role of the microcomputer relay electrical protection tester is widely used in the following categories.
ET3000 Double Clamp Multifunctional Ground Resistance Tester.
<><1. The hazards in the safety standards include the following four types: electrical damage, mechanical and physical damage, low-voltage and high-energy injury, and flammable prevention and control, which are the most basic safety standards in various product safety regulations, among which for general electronic products, electrical damage is the most damaging to users. >>>More
These models have different corresponding design standards, and it doesn't matter if it's good or not! CZF-3 corresponds to GB2408-1996 "Test Method for Burning Performance of Plastics - Horizontal Vertical and Vertical Method"; CZF-5 corresponds to GB2408-2008 "Test Method for Burning Performance of Plastics Horizontal Vertical and Vertical Method", (its content is equivalent to the standard of UL94); CZF-6 corresponds to the GB T12960-1996 "Quantitative Determination of Cement Components" standard, and HVR-JT is the setting of some manufacturers for the model, and its corresponding design standard is consistent with UL94; JXW-056AB is the same as GB T8333-2008 "Test Method for Combustion Performance of Rigid Foam Plastic - Vertical Combustion Method". The relevant standards involved are in the technical information section of the official website of Nanjing Jionglei Instrument, and it is recommended that you can choose to buy the standard according to your actual needs.
There are generally two kinds of electronic formaldehyde testers on the market. >>>More
First of all, when you use the cable fault tester, you must understand whether its terminal port is normal, such as whether there is a rust problem, whether there is an aging problem, if these problems occur, you also need to replace the wire in time, before you can continue to use it, even if you know what the specific experience is, it will affect the entire detection effect after it is connected, and even say that the detected data is very inaccurate, then it will only bring more trouble to yourself. Therefore, when you need to understand its terminal before wiring, see if it is aging or rusty, and if so, you need to replace it in time to ensure the specific detection effect. >>>More