JPS63163288A - Deciding device for line number of hot-line cable run - Google Patents

Abstract

PURPOSE:To decide the correspondence relation of a cable run in a hot-line state by inputting an in-phase detection signal by the transmitting means of an input-side cable run connected to the secondary coil of a transformer and finding at which one the signal appears. CONSTITUTION:A transmitter 10 is equipped with a sender which sends out an C signal of, for example, 1MHz and a pair of output terminals which output the AC signals as the in-phase detection signal to the input-side cable run. A receiver 20, on the other hand, is equipped with a band-pass filter of 1MHz which passes a detection signal inputted from an input terminal, an amplifier, a rectifying circuit, and a voltmeter as a detecting and displaying device. When the correspondence relation between input-side cable runs 2 and 3 and output- side cable runs 6 and 7 is decided, in-phase detection signals i1 and i2 are sent from the output terminals of the transmitter 10 to the input-side cable run 2 connected to, for example, terminals of the secondary coil L2 of the transformer TR1. The signals i1 and i2 are in phase with each other, so they cancel each other at the secondary coil L2 of the transformer TR1 and never appears at the primary coil L1. The signals of the cable runs 6 and 7 are checked to decide the output-side cable runs of the cable run 2.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is directed to a power supply system in which a plurality of electrical circuits connected to a main power line via a transformer are drawn out through a black box-like wiring path of a predetermined electrical load. In cases where
The present invention relates to a method for identifying a live electrical circuit, which determines the correspondence between an input electrical circuit and an output electrical circuit of an electrical load in a live electrical state.

[Technical background of the invention]

As shown in FIG. 4, there are, for example, three electric circuits 2, 3.4 connected to the main power line through one-lance TR, TR, TR, and each of these electric circuits 2, 3. .4 is drawn out through a black box-like wiring path in which the internal wiring state of the specified electrical load is not well understood, and the correspondence between the input side electric circuits 2, 3.4 and the output side electric circuits 6, 7.8 is unclear. In a certain situation, for example, if there is some margin in the power supply capacity of the input circuit 2 and you want to connect a load to the corresponding output circuit, the easiest way to deal with this is to turn off the input circuit 2. All you have to do is find the output side circuit that is turned off.

However, if the electrical load is one that cannot be turned off, such as a computer room, it is necessary to determine the correspondence between the input-side electrical circuit and the output-side electrical circuit while the electrical load remains live.

[Purpose of the invention]

This invention was made in view of the above needs.

The purpose of this is to make it possible to easily determine the correspondence between the input and output circuits connected to electrical loads whose internal wiring is a black box. The purpose of this invention is to provide a method for determining the number.

[Structure of the invention]

In order to achieve the above object, in the present invention, a detection signal of the same phase is inputted to the input side electric line connected between the secondary coil terminals of the transformer by the transmitting means, and the detection signal is transmitted to the output side by the receiving means. By finding out which of the electrical circuits it appears in, it is possible to determine the correspondence between the input-side electrical circuit and the output-side electrical circuit.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

In implementing the method according to the invention, a pair of transmitter 10 and receiver 20 is used. In this case, the transmitter 10 is for example IMIIz, as shown in the second tooth.
an oscillator 11 capable of oscillating an alternating current signal; and an oscillator 1 capable of outputting the alternating current signal as an in-phase detection signal to the input side electric circuit.
Pair output terminal ○UTI.

0UT2. On the other hand, as shown in FIG. 3, the receiver 20 includes an IMHz bandpass filter 21 . an amplifier 22 for amplifying the detection signal from the filter 21; A rectifier circuit 23 for rectifying the detection signal amplified by the amplifier 22 and a voltmeter 24 as a detection signal indicator are provided.

In order to determine the correspondence between the input side electric circuits 2, 3.4 and the output side electric circuits 6, 7.8, first, the output terminal 0UT of the transmitter 10 is
An in-phase detection signal I112 is sent from I,0UT2 to the input circuit 2 connected between the terminals of the secondary coil L2 of the transformer TR, for example. This detection signal i
12 is in phase, so the secondary coil L of the transformer TR□
2 cancel each other out and do not appear in the negative side coil L1, that is, the detection signal 11112 does not flow into the other input side electric circuits 3 and 4 via the transformers TR2 and TR3.

Therefore, by checking whether the detection signal is detected in either of the output circuits 6 and 7° 8 in the receiver 20, the output circuit corresponding to the input circuit 2 is determined while the circuit is live. be able to. By performing the same operation as above for the input side electric circuit 3, it is possible to determine the corresponding output side electric circuit, and in this embodiment, the remaining output side electric circuit corresponds to the input side electric circuit 4. It is determined that the

〔effect〕

As is clear from the description of the embodiments described above, according to the present invention, it is possible to output two in-phase detection signals to the input side electric circuit.
By using a transmitter with two output terminals and a receiver that can detect the detection signal in the output circuit, the correspondence between the input circuit and the output circuit can be established without turning off the power. can be distinguished very easily, and the effect is remarkable.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing an example of the operation of this invention;
The figure is a block diagram showing the configuration of a transmitter used to implement this invention, FIG. 3 is a block diagram showing the configuration of a receiver also used to implement this invention, and FIG. FIG. 2 is a block diagram for explaining the background. In the figure, 1 is the main power line, 2, 3.4 is the input side electric circuit, and 5
is the electric load, 6, 7.8 is the output side electric circuit, 10 is the transmitter,
20 is a receiver.

Claims (1)

[Claims] In a case where a plurality of electric circuits are connected to the main power line through transformers, and each of the electric circuits is led out through a black box-like wiring path of a predetermined electric load, A method for identifying a live electrical circuit that determines the correspondence between an input electrical circuit and an output electrical circuit of the electrical load in a live state, the method comprising: The activity is characterized in that the correspondence between the input side electric circuit and the output side electric circuit is determined by inputting an in-phase detection signal by the transmitting means and detecting the detection signal by the receiving means in the output side electric circuit. How to determine the wire number of a power line.