TWJB-03A Modern Microcomputer Relay Protection Tester

TWJB-03A Modern Microcomputer Relay Protection Tester

Modern microcomputer relay protection testers can be divided into two forms. One is to use traditional ICL power amplifiers, which are bulky and weigh around 25Kg. The amplifier tubes work in the amplification area and are prone to damage over time. Additionally, the dynamic range is narrow and the accuracy is not high. Another approach is to use switch mode power supplies, with digital amplifiers as power amplifiers, which are small in size, light in weight, and highly efficient. This is the development direction of relay protection testers.

The TWJB-03A relay protection tester is a new type of miniaturized microcomputer relay protection tester that is developed by summarizing the advantages and disadvantages of similar products at home and abroad, widely listening to user opinions, and fully utilizing modern microelectronics technology and power electronics technology. It adopts internationally popular DSP and switch amplifier technology, and has a powerful independent operation function for a single machine. Coupled with PC software, it can be connected to a computer for operation, adding to its functionality. However, its volume and weight are only half of traditional testers. The advanced design concept makes this tester achieve the goal ofInternational · AdvancedLevel.

TWJB-03A Modern Microcomputer Relay Protection Tester

Technical Parameter

1Current source:

AC amplitude: 0-40A/phase 0-120A/three-phase parallel connection

DC amplitude: 0-30A/phase 0-90A/three-phase parallel connection

Power:400VA/phase

Accuracy:0.2%，response time<160μs，

resolving power:AC 1mA, DC 2mA

2Voltage source:

Communication amplitude: 0-125V/phaseline voltage0---250V

DC amplitude: 0-110V/phase

Auxiliary power supplyVZ：3V0 0-110VDC or 0-220VDC

z·uihigh-power:50VA/phaseAccuracy:0.2%response time<120μs

resolving power:AC 2.5mV DC 3.5mV

3Frequency:Range 0-1000Hz Resolution 0.001Hz (power frequency) 0.1Hz (1KHz)

4phase:Range 0-360 degrees Resolution: 0.1 degrees Accuracy: 0.1 degrees

5Switch input:7 pairs of empty contacts or potential flipping (5-250VDC)

6Switching output:3 pairs of 0.5A/250VAC

7Supply Voltage： 120V～250VAC 50/60Hz

8Chassis size:450mm×150mm×370mm

9weight： 11.6kg

TWJB-03A Modern Microcomputer Relay Protection Tester

main features

1. Intelligent host, controlled by DSP chip, with 16 bit DAC output, capable of generating high-density sine waves of 2000 points per week for the fundamental wave, which is commonly used in domestic testing instrumentshigh-level. Greatly improved waveform quality and enhanced the accuracy of the testing instrument.

2. Single machine independent operation, the device is operated by a rotating mouse through a large LCD screen, with a complete set of Chinese display. It can calibrate various relays, protection and safety automatic devices on site, and simulate various large and complex instantaneous, * *, and conversion faults for whole group testing.

3. By connecting to a computer and using the complete set of Chinese operating software on the Windows 98 platform, various large-scale, complex, and highly automated calibration tasks can be performed. It is convenient to test and scan various protection settings, store test data in real time, display vector diagrams, draw fault waveforms, and print reports online.

4. The LCD display adopts a 320 × 240 dot matrix graphics module, and the operation interface is displayed in Chinese, which is intuitive and clear.

5. The "foolproof" operation adopts an advanced "rotating mouse" controller, which eliminates complex keyboard operations and can be operated without computer knowledge, making it easy to learn.

6. The whole machine adopts switch power supply and switch amplifier technology, with small size and light weight, weighing only 11.6 kilograms.

7. Modular design, all plugins are completely independent, and hardware maintenance and upgrades can be achieved by simply replacing the plugins.

8. Random configuration, such as configuring as 6-phase current, 5-phase voltage+2-phase current, etc.

9. Users can calibrate the accuracy of the tester through software

10. Can replay fault waveform data in Comtrade format.

11. Designed according to international standards, the power factor correction circuit of the device achieves an efficiency of over 95%.

12. When the power supply voltage drops to 120V, the device still operates normally.

13. The amplifier adopts hardware protection to ensure the reliability of the device.