The wireless high-voltage nuclear phase meter is a special-purpose device used for checking the phase sequence of large-scale equipment such as high-voltage power lines and transformers before installation and operation. The PSWHX wireless high-voltage nuclear phase meter has changed the past contact-type measurement method, eradicating the danger of contact-type measurement, which has ensured the personal safety of the measurement personnel. The measurement method is simple and the measurement results are reliable.
Parts of the red (X emitter) and yellow (Y emitter) wireless high-voltage phase detectors are transmitting devices. The transmitting devices are used to collect signals of high-voltage lines and transmit the signals to the receiving devices. The receiving host processes the transmitted signals and displays them. Phase angle, vector diagram and other results, and inform the user of the line voltage phase relationship measured by the current two transmitters.
1, the instrument self-test.
The self-test does not need to be equipped with a dedicated test line. The device can be tested using only the supplied charging power source. The self-test method is as follows:
Connect the supplied charger to the power supply, and insert one or three power cords into the charging holes of the two transmitters and receivers. At this time, manually touch the metal hook of the transmitter (guarantee two metal hook contacts). The receiver will measure the phase angle of the signal as 0°. If the two metal hooks do not touch at the same time in the contact metal hook configuration, the phase angle measured by the receiver will be greater than 0°. This method can verify whether the instrument is working properly.
2, line nuclear phase
a. Before the nuclear phase is performed on the line (or cable), the instrument may be inspected at the same place (such as the incoming or outgoing line of the switch, the high voltage side or the low voltage side of the transformer) to determine that the instrument is operating normally and the X and Y emission can be performed. The devices are connected to the three phases of A, B, and C on the same outgoing line respectively. According to Table 1, it is determined that the instrument is operating normally.
b. Make sure that the instrument can enter the on-site nuclear phase work after the self-test passes. The 0.38KV-110KV wireless high-voltage nuclear phase meter also refers to the table to determine the line incoming line, and then adjusts the sequence of the line according to the instrument test results.
3, high-pressure phase measurement
Phase measurements can be made on any line using the wireless high-voltage nuclear phase meter . The X emitter (red) is used as the reference phase and the Y emitter (yellow) is in contact with other lines. The result of the measurement is the X emitter's line and Y emission. The phase difference between the lines where the device is located, such as a test result of 30°, indicates that the voltage of the line connected to the X transmitter is 30° ahead of the Y transmitter line voltage, and so on.
4, phase sequence judgment
The phase sequence judgment is similar to the phase test method. A positive or negative sequence judgment according to Table 1 can also be used to judge whether the measured line is a positive sequence or a negative sequence based on the vector diagram. Compared with the results of Table 1, the viewing vector indicator will be more introductory.
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