The TZY-TX2000B microcomputer resonant elimination device (referred to as the "microcomputer resonant elimination device") is a product designed to address malignant accidents such as voltage transformer (PT) burnout or even explosion caused by ferromagnetic resonance in power systems. A new type of intelligent harmonic elimination device developed and produced by Taizhongyan Electric. The device is based on a high-performance DSP processor, with high-power, contactless harmonic elimination components exported. It uses a liquid crystal display (LCD), signal indicator lights, and touch buttons as the human-machine interface, and is equipped with intelligent software to form a technology and principle. It is a simple and convenient intelligent device for resonance fault diagnosis, elimination, and recording. Compared with similar devices, it has the characteristics of high integration, strong anti-interference ability, small size, light weight, accurate and rapid action. The product has passed the type test of the National Relay Protection and Automation Equipment Quality Supervision and Inspection Center of China · Cape Laboratory.

The device displays the system clock in real time, and can display the current voltage and frequency of the PT opening triangle of sections 1-2 of the busbar in real time through button operation. Can distinguish overvoltage, resonance, and grounding (3U0 exceeding the limit). The on-site operation of large enterprise substations/power plants such as State Grid Corporation of China, China Southern Power Grid Corporation, power plants, metallurgy, coal, petroleum, and chemical industries has shown that the TZY-TX2000B microcomputer resonant elimination device is reliable.

2.1 High reliability: Adopting foreign high-speed DSP chips and CMOS industrial grade chips, it has the characteristics of electromagnetic shielding, software and hardware redundancy, fast operating speed, strong anti-interference ability, and low power consumption

2.2 The screen adopts a wide temperature LCD display, which can facilitate human-machine dialogue and easy operation

2.3 High quality analog-to-digital converters have good temperature resistance, fast conversion speed, and high measurement accuracy

2.4 Rich communication interfaces: RS-232 interface, RS-422 interface, RS-485 interface (standard configuration) or Ethernet interface (optional). Suitable for unmanned substations or comprehensive automation equipment

2.5 Fault record information can be recalled 20 times through the LCD screen display, and the information will not be lost after the device loses power

2.6 It can distinguish between busbar grounding and resonance, and has grounding (3Uo over limit) monitoring and alarm functions

2.7 Harmonic elimination function can be divided into frequency bands and bus segments for switching on and off, and has segmented re switching settings with adjustable time intervals

2.8 Startup voltage can be set by software

2.9 Modular design of chassis structure plug-in

3.1 Working power supply: AC220V ± 10% 50Hz

DC220V ± 10% (please declare in advance for special orders)

Device power consumption: ≤ 10W

3.2 Number of harmonic elimination sections: 1-4. (Commonly used on-site configuration: The switchgear is equipped with 1-stage harmonic elimination, and the comprehensive self-protection is equipped with 2-stage harmonic elimination)

3.3 Harmonic Elimination Frequency: Triple Frequency Division, Double Frequency Division, Fundamental Frequency Division, Double Frequency Division, Triple Frequency Division, Four Frequency Division, Five Frequency Division, Six Frequency Division, Seven Frequency Division

3.4 The amplitude of the harmonic elimination voltage can be set to 5-200V, the detection range is 5-200V, and the measurement error is not greater than 2%

3.5 Alarm relay contact capacity: DC30V/8A, AC250V/8A

3.6 Resonance and 3Uo over limit (grounding) records: 20 records, and no loss during power failure

3.7 Communication interfaces: Ethernet interface (optional), RS-232, RS-422, RS-485 (default 485 mode)

3.8 Communication protocol: optional DISA and Modbus protocols

3.9 Communication baud rates: 1200bps, 2400bps, 4800bps, 9600bps, 19200bps are optional