DRJB830A Three-phase Relay Protection Tester

The relay protection tester is a new type of miniaturized microcomputer relay protection tester that is developed on the basis of referring to the "Technical Conditions for Microcomputer Relay Protection Test Devices (Discussion Draft)" issued by the Ministry of Electric Power, extensively listening to user opinions, summarizing the advantages and disadvantages of similar domestic products, and fully utilizing modern advanced microelectronic technology and devices. It adopts an advanced structure that can operate independently as a standalone unit or be connected to a laptop computer for operation. The host is equipped with a new generation of high-speed digital signal processor microcomputer, true 16-bit DAC module, new modular high-fidelity high-power amplifier, built-in large-screen LCD display and flexible and convenient rotating mouse controller. Standalone operation already has strong functions, can perform most tests, and when connected to a computer, it has more powerful operation functions. Small size, high precision.

Product Features

DRJB830A Relay Protection TesterMain Technical Parameters:

AC Voltage Output

0~250V continuously adjustable, max output capacity 600VA, over-range protection 260V

DC Voltage Output

0~250V continuously adjustable, max current 2A, over-range protection 260V, overload protection action current 2.1A±5%.

DC Current Output

0~200mA 0~5A continuously adjustable

At 0~200mA, open circuit voltage 48V, overload protection action current 230mA.

At 0~5A, open circuit voltage 24V, overload protection action current 5.2A.

Standard 12-channel current and voltage output, flexible organization

Can output 12 channels (6 voltage, 6 current) simultaneously

Can output 6 channels of current or 6 channels of voltage separately

DRJB830A Three-phase Relay Protection TesterMain Features:

1. Embedded host, equipped with ultra-large-scale programmable logic device (CPLD)

The host adopts a high-speed high-performance embedded microcomputer system equipped with CPLD, with fast response speed, wide transmission bandwidth, can generate high-density fitting sine wave with 500 points per cycle for fundamental wave, output waveform is smooth, no harmonic components. Due to the large number of output points, and through precise filtering circuits, the waveform distortion is extremely small. When outputting harmonics, even for 9th harmonic, 450Hz, it can reach a high density of 55 points per cycle. The software has very strong human-machine dialogue and online help functions, and can control any test parameter.

2. Standalone 12-channel D/A simultaneous output

The host uses a high-speed high-performance embedded microcomputer system equipped with CPLD, with fast response speed, wide transmission bandwidth, can generate high-density fitting sine wave with 500 points per cycle for fundamental wave, output waveform is smooth, no harmonic components. Due to the large number of output points, and through precise filtering circuits, the waveform distortion is extremely small. When outputting harmonics, even for 9th harmonic, 450Hz, it can reach a high density of 55 points per cycle. The software has very strong human-machine dialogue and online help functions, and can control any test parameter.

3. High-fidelity power amplifier

The newly designed high-fidelity power amplifier has the characteristics of high linearity, low noise, small size, light weight, high reliability, and convenient maintenance. The output stage uses a new type of high-power power transistor, which has a large safe working area and strong overload capacity. The power amplifier has perfect protection measures, including overcurrent, overvoltage, overheat, and short-circuit protection, ensuring safe and reliable operation.

4. Large-screen LCD display

The tester is equipped with a large-screen LCD display, which can display various test parameters and waveforms in real time, making the operation more intuitive and convenient. The display has high brightness, wide viewing angle, and long service life, adapting to various working environments.

5. Flexible and convenient rotating mouse controller

The tester adopts a rotating mouse controller, which is flexible and convenient to operate. It can easily set test parameters, select test items, and control the test process. The controller has the characteristics of high reliability, long service life, and simple operation, making it easy for users to get started.

6. Powerful software functions

The tester is equipped with powerful software, which can complete various relay protection tests, including overcurrent, undervoltage, overvoltage, differential, impedance, frequency, and other tests. The software has a friendly interface, complete functions, and convenient operation, which can greatly improve test efficiency and accuracy.

7. Small size, high precision

The tester has a compact structure, small size, light weight, and is easy to carry and move. At the same time, it has high test precision and stable performance, meeting the requirements of various precision tests.