本文采用型号CM111-50-63B-10193W华明M型有载分接开关

In this paper, Ming Wah CM111-50-63B-10193W Model M-load tap-type sensor is a piezoelectric sensor and a conventional charge amplifier based on one of the LC0151 sensor. The sensor has a high resolution, anti-interference and noise is small and so on. During switching contacts in different conditions of a vibration signal, the signal sampling frequency is 50kHz, the contact switching time is about 100ms, frequency is at less than 20kHz, 6873 sampling points taken, concentrated in switching time 0 ~ 41ms, the an acceleration sensor installed in places away from the vibration source relatively close, considering the load is mounted atop the tap, through the data acquisition card and converts the vibration signal into a digital signal stored on the computer, to install the sensor and the test system shown in Figure FIGS. 3 shown in FIG. By lifting the tripod, the operation mechanism inside the tap is extracted from the pair of contacts for fault setting out. <br>When the measured signal waveform graph analysis, the signal is normalized, the average amplitude of the normal condition as a reference, is multiplied by the normalization coefficient corresponding to other operating conditions, different conditions such that the average vibration amplitude consistent. Normalized only change the size of the signal amplitude does not change the magnitude of the impact on the results, we can preserve the integrity of the signal. The processed waveforms shown in FIG. 4.

In this paper, the model CM111-50-63B-10193W Huaming M type has an on-board tap switch, the type of sensor is the traditional piezoelectric sensor and charge amplifier based on the one-type LC0151 sensor. The sensor has the advantages of high resolution, strong anti-jamming ability and low noise. The contact in the switching process in different operating conditions vibration signal, signal sampling frequency of 50kHz, contact switching time is about 100ms, frequency is concentrated within 20kHz, sampling 6873 points, switching time concentrated in 0 to 41ms, the acceleration sensor installed in a relatively close place to the vibration source, Consider ingress installed on top of the on-load tap switch and storethe the vibration signal into a digital signal via a data acquisition card, as shown in Figure 3 of the sensor installation and test system diagram. Through the tripod lifting, the action mechanism is extracted from the inside of the tap switch to fault the contact.<br>When analyzing the measured signal waveform, the signal is first normalized, the average amplitude under normal operating conditions is used as the benchmark, and the corresponding naturalization coefficient is multiplied under other operating conditions, so that the average vibration amplitude under different operating conditions is consistent. Normalizing only changes the magnitude size of the signal, does not change the effect of the magnitude on the result, and preserves the integrity of the signal. The processed waveform is shown in Figure 4.

In this paper, the model cm111-50-63b-10193w Huaming M-type on load tap changer is used. The type of sensor is lc0151 based on the integration of traditional piezoelectric sensor and charge amplifier. The sensor has the advantages of high resolution, strong anti-interference ability and low noise. The vibration signal of the contact under different working conditions during the switching process, the signal sampling frequency is 50KHz, and the switching time of the contact is about 100ms, The frequency is concentrated within 20kHz, 6873 sampling points are taken, and the switching time is concentrated in 0 ~ 41ms. The acceleration sensor is installed near the vibration source, which is comprehensively considered to be installed on the top of the on load tap changer, and the vibration signal is converted into digital signal through the data acquisition card and stored on the computer. The installation diagram and test system diagram of the sensor are shown in Figure 3. Through the tripod hoisting, the action mechanism is extracted from the inside of the tap changer to set the fault of the contact.<br>In the analysis of the measured signal waveform, firstly, the signal is normalized, the average amplitude under normal working conditions is taken as the benchmark, and that under other working conditions is multiplied by the corresponding normalization coefficient, so that the average vibration amplitude under different working conditions is consistent. Normalization only changes the amplitude of the signal, does not change the influence of the amplitude on the results, and can retain the integrity of the signal. The processed waveform is shown in Figure 4.