The microcomputer harmonic elimination device is a new intelligent power resonance elimination device developed by our company. It is simple and convenient to use and does not require maintenance. It can quickly eliminate ferromagnetic resonances of various frequencies and has high accuracy.At the same time, relevant information can be printed according to user needs or transmitted to the superior monitoring system through a communication interface, which is suitable for unattended substations.

◆ Suitable for various voltage levels in the distribution network;

◆ Up to four bus bars can be monitored;

◆ Quickly eliminate ferromagnetic resonance of characteristic frequencies such as three-divided frequency, two-divided frequency, power frequency and triple frequency;

◆ Ability to distinguish between external overvoltage, ferromagnetic resonance and single-phase grounding;

◆ It adopts high-power, contactless harmonic elimination components, which eliminate harmonic elimination quickly and reliably;

◆ Provide a set of no-access alarm nodes.

◆ When a fault occurs, a fault report can be displayed (Type, time, voltage value and frequency )；

◆ The optional micro printer can print fault reports in a timely manner;

◆ The communication interface can be configured to transmit relevant information to the superior monitoring system;

◆ Save ten recent failure information, and the data will not be lost after power loss;

◆ Hardware watchdog circuit prevents crashes;

◆ It has complete self-test function;

◆ The human-computer interface is simple and convenient to operate, with a full Chinese menu, rich and intuitive display information.

Technical indicators and functional configuration

◆ Indoor use: good ventilation;

◆ Ambient temperature: -10 ℃~+55℃；

◆ Relative speed: less than 90%, no condensation on the surface;

◆ Atmospheric pressure: 80 ~110Kpa；

◆ Altitude: < 2000m；

◆ The surrounding medium has no conductive dust or corrosive gases, molds, etc. that cause metal or damage to insulation;

◆ Working power supply: AC/DC220V（ If there are special requirements, please explain it when ordering), power consumption ≤20W；

◆ Alarm node capacity: AC250V，5A；DC30V，SA；

◆ Communication interface: RS232/485（Choose one, please specify when ordering), baud rate 1200 ~9600bps；

◆ Communication regulations: Three built-in communication regulations CM90、CDT、MODBUS。

How it works

There are many iron core inductor components in the power system, such as transformers, voltage transformers, arc suppression and parallel compensation reactors, which are mostly nonlinear components. They form many complex oscillation loops with the capacitance of the system. If certain conditions are met, a ferromagnetic resonant overvoltage that lasts for a long time can be stimulated.The higher overvoltage and larger overcurrent generated during ferromagnetic resonance are very likely to damage the insulation of the power equipment, endangering the safety of the operating personnel in serious cases.

RCSH100 Real-time monitoring voltage transformer for microcomputer harmonic elimination device PT The voltage and frequency at the opening triangle. When ferromagnetic resonance occurs, the device instantly activates the contactless harmonic element, generating strong resistance, thereby eliminating ferromagnetic resonance.

Dimensions and hole drawings