JPS62156571A - Detecting method for energizing state of wiring in power distribution controlling circuit and electric equipment - Google Patents

Abstract

PURPOSE:To know immediately a defective wiring part and a defective equipment without increasing a wiring takeoff terminal to an external device, by setting other frequency than a commercial frequency to one of wiring buses in a power distributing circuit wiring and an electric controlling circuit wiring so that an energizing state of a wiring in a circuit and an electric equipment can be detected. CONSTITUTION:A current of a different frequency f1 which has evaded a multiple of a commercial frequency is set onto V being one of two pieces of wiring buses U, V by a frequency transmitter or a frequency converter 1. A current of the frequency f1 passes through an external equipment (for instance, a solenoid valve, etc.) 2 from the wiring bus V and flows to a detector AMP 3. The detector AMP cuts off the commercial frequency by an LC resonance circuit, detects the frequency f1, and can discriminate an energizing state of an external wiring, and the external equipment 2 by an amplifier. Also, on the detector 3, for instance, lamps 4, 5 and 6 are provided so that a normal state, a disconnected state, and a short circuit state can be shown.

Description

[Detailed description of the invention] 1. Field of industrial application Constantly monitors the current status of general power distribution circuits, electrical control N-way wiring, and electrical equipment, and immediately detects the occurrence of current failures such as disconnections or short circuits. related to electrical wiring that needs to be repaired or repaired.

2. Conventional Technology Conventionally, when there is a defect in the power distribution circuit or control circuit such as a disconnection or short circuit, it is necessary to inspect each circuit wiring individually using a tester or the like and spend time and effort to discover it. However, when the wiring is complicated as in recent switchboards and control panels, it has been difficult to find faulty parts.

8. Problems to be Solved by the Invention It is an object of the present invention to implement a method that can instantly indicate and discover complex power distribution circuit wiring, control circuit wiring, and common type 1 group 1 in electrical equipment.

4. Means for Solving the Problems The method according to the present invention will be explained with reference to the circuit diagram in Figure 1. One of the two wiring buses N(U)(V) (■) is connected to a frequency oscillator or a frequency converter. (from 11 countries, the commercial frequency (50)h or 60Hz) with a different frequency (fl) avoided.
2, the current of frequency (fl) is the wiring bus (v)
It then passes through an external device (eg Wt&ii valve, etc.) (2) and flows to the detector (AMP) +3+. Detector CAh
lP) cuts off the commercial frequency by an LC resonant circuit,
Detects the frequency (fl) and connects external wiring and external tester (2)
It is possible to identify the energization state of the device using an amplifier. In addition, the detector (3) is equipped with a lamp (4+ (6i +61) in Figure 1, where (4) is in a normal state, +5+ is in a disconnected state,
+61 indicates a short circuit condition.

5. Function As an example of the present invention, if the electrical equipment (2) is described as an Asahi magnetic valve, the frequency oscillator (1) passes through the circuit to the detector (3).
) is expressed by the following equation.

1=- R: Pure resistance of wiring and equipment, reactance of magnetic valve L2: Variable reactance in the detector C: Capacitance in the detector, oscillator frequency fl, variable reactance in the detector L2. If the capacitance C inside the detector is determined, it will be as follows: (1) If the external wiring or force device is disconnected, I = 0 and it will be detected, and the lamp (6) will catch fish (2) If the external wiring or external equipment is short-circuited, Ll = 0, and 1 z = R + jω (L2-1-0) -1-) ωC Since ωL2 = ■, Z = R. Therefore, ■ = -. When the maximum current value f' is detected, the lamp (6) is turned on. Similarly, as shown in Figure 2, the following state can be detected using the current value (a) I=0
Disconnection (b) I=------
--]-Operation R+l (L, +L2) -3- ωC The difference between (b) and (C) is that the iron core is inserted into the solenoid coil. Detect.

6. Effects of the Invention In the present invention, as described above, by applying a frequency current other than the commercial frequency to the distribution circuit wiring and the electric control circuit wiring to the wiring bus bar, the lamp (4) lights up during normal operation, and the lamp (4) lights up when the wiring breaks. (5) lights up to indicate an abnormality, and in the event of a short circuit, the lamp (6) lights up to indicate an abnormality, so simply installing a detector on each wiring can increase the number of wire extraction terminals for external devices. It is easy to install and immediately know about defective wiring and defective machines. Also, if the lamp malfunctions, a buzzer or
When inserted into the interlock circuit, equipment and equipment can be protected, and repairs and repairs can be made immediately, which is highly effective.

[Brief explanation of drawings]

Figure 1 is a circuit diagram of the present invention, where m is a frequency oscillator or frequency converter, and (2) is an external! (3) is a detector. +41 (51+61 is a lamp. Figure 2 is a graph of current values in each state. Patent applicant Noboru Maki C and 2 other stones)

Claims (1)

[Claims] 1. Transmitting a frequency other than the commercial frequency to the power distribution circuit wiring and the electric control circuit wiring using a frequency oscillator or a frequency converter, transmitting it to one side of the wiring bus bar, and transmitting a frequency other than the commercial frequency to the wiring and electric control circuit wiring in the circuit. A method for detecting the energized state of wiring and electrical equipment in which the energized state of the equipment can be recognized with a detector. 2 A frequency current other than the commercial frequency is applied to one side of the wiring bus bar, and the external electrical equipment is energized, and the resonant circuit of the detector cuts off the commercial frequency and detects the frequency to detect conditions such as disconnection or short circuit, and then the external wiring . The method for detecting the energized state of wiring and electrical equipment according to claim 1, wherein the state of the external electrical equipment is identified by an amplifier.