Smr-wx series micro-computer harmonic elimination device produced by SMER company is a new type of micro-computer intelligent harmonic elimination device developed and produced on the basis of widely soliciting user's opinions, aiming at the malignant accident of voltage transformer (PT) burning or even explosion which often occurs in power system due to ferroresonance. With high-performance ARM chip as the core, high-power, non-contact harmonic elimination element as the outlet, LCD, signal indicator, touch button as the human-machine interface, and intelligent software, an intelligent resonance diagnosis, elimination and recording device with advanced technology and principle and simple and convenient use is composed. Compared with the same kind of microcomputer, it has the characteristics of high integration, strong anti-interference ability, small volume, light weight and quick action.
The intelligent microcomputer harmonic elimination device can display the system clock in real time, and display the total open triangle voltage and main vibration frequency of 1-4 bus Pt sections in real time through key operation. It can distinguish ferroresonance, grounding and overvoltage. The field operation of large enterprises such as electric power, metallurgy, coal, petroleum and chemical industry has proved that the refitting device has superior performance and safe and reliable use.
Characteristics of smr-wxa microcomputer harmonic elimination device;
1. High reliability: advanced high-speed arm chips and CMOS industrial chips are adopted, with unique design, electromagnetic shielding, software and hardware redundancy, fast operation speed, strong anti-interference ability and low power consumption.
2. The screen adopts blue white liquid crystal full Chinese display, rich and intuitive information, human-computer dialogue, simple and convenient operation.
3. High quality a / D converter has good temperature resistance, fast conversion speed and high measurement accuracy.
4. Rich communication interface: RS232 interface, RS485 interface, harmonic elimination is applicable to unattended substation or integrated automation equipment.
5. The fault record information can be recalled 20 times through the LCD screen, and the information will not be lost after the device is powered off.
6. Distinguish harmonic elimination, single-phase grounding and overvoltage fault.
7. Rich alarm interface, power failure alarm, resonance alarm, grounding alarm, overvoltage alarm, general alarm, convenient access to comprehensive protection.
8. The number of harmonic elimination and the interval between two harmonic elimination can be set.
9. Automatic protection function after thyristor breakdown.
