Comprehensive Relay Protection Tester adopts single-chip microcomputer technology, consisting of an automatic synchronous digital millisecond meter, logic control unit, multi-functional digital display unit, high-precision data acquisition and processing unit, current and voltage output unit, overload and over-range protection unit, etc. It is controlled by an embedded industrial computer or an external PC, adopting the multi-functional single-case, modular structure of Shanghai Rixing Electric Co., Ltd., with an 8.4-inch color LCD display on the panel. The graphic window operation interface is easy to operate, with a built-invirtual keyboard, and can be operated with only a mouse.
It is equipped with expansion serial port and USB port for communication with other PCs, and test results can be uploaded. The software can be upgraded locally through the Internet. With high D/A bits, good current and voltage accuracy, and a power amplifier using direct coupling amplification for both AC and DC, it can well simulate the transient process of power systems. The large current source output power and good wide-band amplitude-frequency characteristics enable it not only to test the characteristics and setting values of various microcomputer-based protections, but also to verify the characteristics and setting values of conventional electromagnetic protections and safety automatic devices. It not only meets the requirements of debugging relay protection in grassroots power units such as power plants and power supply bureaus.
FoldThe microcomputer relay protection tester is a new type of intelligenttesting instrument. Previous relay protection test tools mainly consisted of voltage regulators and phase shifters, which were bulky and inaccurate, and could no longer meet the calibration work of modern microcomputer relay protection. With the continuous development of science and technology, microcomputer relay protection has been widely used in line protection, main transformer differential protection, excitation control, and other fields, andcomprehensive automation of substations has become the mainstream. Modern microcomputer relay protection testers can be divided into two forms: one uses traditional OCL power amplifiers, which are large and heavy, weighing about 25Kg, and the power amplifier tubes operate in the amplification region, making them prone to damage over time, with narrow dynamic range and low accuracy. The other usesswitching power supplies, with digital power amplifiers, which are small in size, light in weight, and high in efficiency, representing the development direction of relay protection testers. It can test various types of relays such as voltage, current, frequency, power, impedance, harmonic, differential, and synchronization relays manually or automatically, simulate various fault types for distance and zero-sequence protection device setting verification and complete group testing of protection devices, automatically scan the ratio braking curves of microcomputer and digital transformer and generator-transformer differential protections, and has GPS trigger function. The microcomputer-based relay protection testing device is an important testing tool to ensure the safe and reliable operation of power systems. With thecomputer technology,microelectronics technology, and power electronics technology developing rapidly, it is an inevitable trend of technological progress to continuously introduce new high-performance microcomputer relay protection testing devices by applying the latest technological achievements. The relay protection testing device is an important testing tool to ensure the safe and reliable operation of power systems. With the continuous expansion of modern power systems and the increasing requirements for reliability and efficiency of power system operation and management, the testing work of relay protection personnel has become more frequent and complex. Today, 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 testers by applying the latest technological achievements, and it is also our responsibility given by the times. The relay protection tester is a new type of miniaturized microcomputer relay protection tester implemented on the basis of the People's Republic of China electric power industry standard "Technical Conditions for Microcomputer-based Relay Protection Test Devices" (DL/T 624 ─ 1997), fully utilizing modern advanced microelectronics technology and devices. It adopts an advanced structure that can operate independently as a single unit or connect to other computers for operation. The host is equipped with 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, and comes with a TFT true color LCD display and embedded microcomputer keyboard. It can be operated independently as a single unit or connected to alaptopfor operation. It has powerful functions, small size, and high accuracy. It not only has the superior performance and advanced functions of large testers, but also the compactness, flexibility, easy operation, and high reliability of small testers.
