Smart earth resistor on-line monitor and system thereof
A technology of grounding resistance and monitoring system, applied in grounding resistance measurement, measuring resistance/reactance/impedance, instruments, etc., can solve problems such as affecting users' normal power consumption, low efficiency, and needing power outage operations, and achieve high stability and high performance. The effect of precision and high reliability
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Embodiment 1
[0074] Embodiment 1: The transmission system tower is grounded, such as Figure 8 and Figure 9 shown;
[0075] They are connected by overhead ground wires to form a multi-point grounding system, which is very convenient for monitoring. Among them: R1 is the predicted grounding resistance, R0 is the equivalent resistance after the parallel connection of the grounding resistances of all other towers, that is, R0=R2∥R3∥R4∥...∥Rn, if n is larger (more grounding points), the value of R0 The closer to 0, far smaller than R1, from an engineering point of view, R0 = 0, so the data obtained by the monitor should be the value of R1. A monitor can be installed for each tower, and the grounding resistance value of each tower can be tested at the same time.
Embodiment 2
[0076] Embodiment 2: The computer room and the transmission tower are grounded, such as Figure 11 shown;
[0077] The grounding of the computer room and the transmission tower is generally independent in the field. Connect the two to form a two-point circuit, and then install the monitor, as shown in the figure below. It is also possible to make two additional auxiliary grounding electrodes and monitor them with the three-point method.
Embodiment 3
[0078] Embodiment three: building grounding, such as Figure 12 shown;
[0079] If R1~R6...Rn are independent grounding bodies in the ground and are not connected together to form a multi-point grounding system, the monitoring can be very convenient to monitor the grounding resistance value. If R1~R6...Rn are connected together underground, it is a single-point grounding system, and the grounding resistance is tested according to the single-point grounding system. The direct installation is to monitor the metal circuit resistance, and the grounding condition can be judged.
[0080] For large-scale building ground grids, it is enough to monitor its grounding status - the equipotential value between the grounding downconductor and the ground grid. Because of this kind of large-scale ground network, if there is a problem with the grounding, it will only be the connection between the grounding downconductor and the ground network, so it is enough to monitor and judge whether the ...
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