Wired high-voltage nuclear phase analyzer

Wired high-voltage nuclear phase analyzerworking principle:
RA=RA 'is a fixed high resistance phase bar. A fixed resistor Ra=Ra ', an adjustable resistor r and r', and a microampere meter Ig are assembled into a nuclear phase meter. According to the principle of generalized AC bridge. When UA=UA ', adjusting the forward r and r' can balance the bridge, that is, Xg=0. At this time, the amplitude and phase of the measured voltage at both ends are the same. If the voltage phases at both ends are the same but the amplitudes are not equal, adjusting r and r 'can still balance the bridge. Only when the phases at both ends are different, adjusting r and r 'cannot balance the bridge, i.e. Ig ≠ 0. At this point, the voltage at both ends being tested is not in phase.

Wired high-voltage nuclear phase analyzerConclusion:
1. It is a live testing tool used to verify the phase of high-voltage power lines under operating voltage, especially for the high frequency withstand voltage test of the nuclear phase rod directly in contact with high voltage. The results indicate that its insulation performance and safety distance can meet the requirements of electrical safety regulations. In addition, due to the discharge indicator tube installed at the end of the nuclear phase rod, it can ensure personal and equipment safety even when the connection between the end of the nuclear phase rod and the nuclear phase meter is disconnected.
2. From simulating the voltage at both ends, it can be seen that the same phase voltage with a large phase difference of 30 ° (such as a long-distance transmission line), although adjusting the r and r 'resistors cannot balance the bridge *. But compared with the Ig values measured by other two phases with different names, the difference between them is 2-3 times, and they can still distinguish the different phases of the three phases.
3. After long-term practical use, it is generally reflected that the instrument is safe, reliable, easy to use, has high nuclear phase resolution ability, and is lightweight to carry.

4. After undergoing certain high-voltage calibration, this instrument can also be used for measuring high voltage.

Test results

1. The resistance value and external measurement results of a single core rod are shown in Table 1

2. The results of the power frequency withstand voltage test for a single nuclear phase rod are shown in Table 2