本装置采用高性能的单片微机作为核心元件，对PT开口三角电压（即零序电压）进行遁环检测。正常工作情况下，该电压小于30V，装置内的大功率消谐元件（固态继电器）处于阻断状态，对系统运行不产生影响。当PT开口电压大于30V时，系统出现故障。消谐装置开始对此信号进行数据采集，通过电路对信号进行数字测量、滤波、放大等数字信号处理技术，然后对检测到的数据进行分析、计算，得出故障类型。如果当前是铁磁谐振，系统立即启动消谐电路，使固态继电器导通，让铁磁谐振在阻尼作用下迅速消失。此时，CPU系统进行记录、存贮，并自动报警、显示谐振信息（时间、频率、电压值）。如果电路是过电压或单相接地故障，微机系统检测后，分别给出显示和报警，并记录、存贮有关故障信息。CPU系统处理完最后，返回起始状态，并继续检测电路中的状态。

The device adopts the high performance monolithic microcomputer as the core component, and the test of the clench of the open delta voltage (i.e., zero sequence voltage) of PT open. Under normal working conditions, the voltage is less than 30V, and the large power dissipating element (solid-state relay) in the device is in a blocking state and does not affect the operation of the system. When the PT open voltage is greater than 30V, the system fails. Harmonic elimination device began the process of signal data collection, through the circuit for digital signal measurement, digital signal processing technology such as filtering, amplification, and then analyze the detected data, calculation, it is concluded that the fault type. If the current ferromagnetic resonance is present, the system will activate the anti-harmonic circuit immediately, so that the solid state relay conductance, and the ferromagnetic resonance will disappear rapidly under the damping effect. At this point, the CPU system records, stores, and automatically alarms and displays the resonant information (time, frequency, voltage value). If the circuit is overvoltage or single phase ground fault, the microcomputer system is tested, the display and the alarm are given separately, and the information about the fault is recorded and stored. The CPU system finishes, returns the initial state, and continues to detect the state in the circuit.

其特点为：适用于35KV以下各种电压等级，各种谐振频率（1/3分频、1/2分频、工频、3倍频）使用范围广泛；无需整定和调试，开机自检后自动进入运行状态，设备维护量低；在铁磁谐振时进行快速消除，在过电压，单相接地等故障时给出报警信号并显示保存相关信息；实时显示，记录铁磁谐振发生时间及相关参数（电压和频率）；可存储20重故障信息供追忆和显示；以接点闭合方式输出或语言报警输出；可以配置通信接口（RS485接口）；可以配置微型打印机可以及时打印输出故障报告（故障类型、故障时间及4种频率的电压分量）。

The characteristics are: applicable to the various voltage grades under 35KV, the range of resonant frequencies (1/3, 1/2, frequency, frequency, and frequency of frequency) are widely used; No need to set up and debug, turn on the self-check automatically to enter the running status, the equipment maintenance volume is low. In the case of ferromagnetic resonance, the alarm signal is given and the relevant information is displayed at the time of failure of the voltage, single phase grounding, etc. Real-time display of the time and relative parameters (voltage and frequency) of the ferromagnetic resonance. 20 fault information can be stored for recall and display; Output or language alarm output in the form of a contact closure; You can configure the communication interface (RS485); The printer can be configured to print the output failure report in time (fault type, failure time, and the voltage component of the four frequencies).

二次消谐器装置是针对电力部门和用户由于铁磁消谐而时常发生的电压互感器（PT）烧毁甚至爆炸的恶性事故，研制开发的一种智能消谐装置。本装置利用80C196单片机作为检测、控制的核心元件。具有运算速度快，性能稳定，抗干扰能力强等优点。不但可以消除铁磁谐振，还可以对过电压，单相接地作出指示。

Second harmonic elimination devices for electric power department and users frequently occurred due to ferromagnetic harmonic elimination of voltage transformer (PT) burning explosion even malignant accident, research and development of an intelligent harmonic elimination device. This device USES the 80C196 single chip as the core element for detecting and controlling. It has the advantages of fast operation, stable performance and strong anti-jamming ability. Not only can the ferromagnetic resonance be eliminated, but also the voltage, the single phase ground is indicated.