JPH1164417A - Device for probing power supply condition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dnrice for probing power supply condition capable of easily and quickly probing the power supply condition of the respective kinds of low voltage equipments supplied with power or a distribution line in a hot- line state. SOLUTION: This device is provided with an insertion plug 11 for a probing and an outlet 21 for the probe, a current made to flow to a line between the insertion plug 11 for the probe and the outlet 21 for the probe or an applied voltage is detected in a detection circuit and an analysis arithmetic part 5 analyzes the power supply quality of a power supply line, based on the detection signals. Thus, the insertion plug 11 for the probe is connected to the outlet 101 of the power supply line 100, an equipment side insertion 111 provided on the power supply cord terminal of the respective kinds of the low voltage equipments or the like is connected to the outlet 21 for the probe and the power supply quality of the power supply line 100 is easily and quickly probed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply condition detecting device for detecting a power supply condition of a power supply line, and more particularly to a power supply condition detecting device for detecting various conditions of a low-voltage power supply.

[0002]

2. Description of the Related Art Conventionally, there has been a power supply condition inspection apparatus of this type shown in FIG. In the figure, a conventional power supply situation investigating device is provided with a connecting clip 15
1. The connecting CT 152 is extended, and the connecting clip 151 or the connecting CT 152 is connected to the power cord 112 of various low-voltage devices 110 such as a copying machine or a facsimile machine to which power is supplied. Alternatively, the configuration is such that the apparatus main body 150 performs a search by analyzing power supply conditions based on a detection signal input via the connection CT 152.

[0003]

SUMMARY OF THE INVENTION Since the conventional power supply situation exploring apparatus is constructed as described above,
When connecting the connection clip 151 or the connection CT 152 to the various low-voltage devices 110 to which power is supplied via the outlet 101 of the 00, the power cord 112 of the various low-voltage devices 110 is removed or cut off, for example. Otherwise, it cannot be connected or mounted, and cannot be set easily and quickly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and provides a power supply condition detecting device capable of easily and quickly searching for the power supply condition of various low-voltage devices to which power is supplied or a distribution line in a live state. The purpose is to do.

[0005]

According to the present invention, there is provided a power supply situation exploring apparatus, wherein an outlet is provided on a power supply line, and power is supplied to the load by inserting a plug on the load side into the outlet. In a power supply condition exploration device for exploring circumstances, a search insertion plug connected to the outlet, a search outlet connected to the load side plug, and a line between the search plug and the search outlet are arranged. And a detecting means for detecting a current flowing through the line and / or a voltage applied thereto, and an analysis calculating means for analyzing a power supply quality in the power supply line based on a detection signal output from the detecting means. It is. As described above, in the present invention, an exploration plug and an outlet are provided, and a current flowing through a line between the exploration plug and the outlet or an applied voltage is detected by the detection means, and based on the detection signal, Since the analysis and calculation means analyzes the power supply quality of the power supply line, the exploration plug can be connected to the power supply line outlet, and the exploration outlet can be connected to the plug provided at the end of the power cord of various low-voltage devices. Thus, the power supply quality of the power supply line can be easily and quickly searched.

[0006] The power supply situation investigation device according to the present invention is provided with storage means for storing the analysis result of the analysis operation means as required. Thus, in the present invention,
Since the analysis result of the analysis operation means is stored in the storage means, reconfirmation of the analysis result can be facilitated.

[0007] The power supply situation exploring apparatus according to the present invention is provided with output means for outputting an analysis result of the analysis operation means as required. Thus, in the present invention,
Since the output unit outputs the analysis result of the analysis operation unit, the power supply quality of the power supply line can be immediately confirmed at the detection site.

[0008] In addition, the power supply situation exploring device according to the present invention is provided with an overcurrent breaker between the exploration insertion plug and the exploration outlet as required. As described above, in the present invention, since the overcurrent circuit breaker is disposed between the exploration plug and the outlet, the accident occurred during the exploration of the power supply quality of the power supply line to the existing power supply line. Power supply to only various low-voltage devices connected to the power supply line can be cut off without operating the provided overcurrent breaker.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment of the Present Invention) Hereinafter, a power supply situation detecting device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall schematic configuration diagram of the power supply condition searching device according to the present embodiment, and FIG. 2 is an explanatory diagram of a search operation of the power supply condition detection device shown in FIG.

In each of the drawings, a power supply situation detecting device according to the present embodiment includes a plug unit 1 connected to an outlet 101 provided in a power supply line 100,
1 and an outlet 2 to which a device-side plug 111 for supplying power to the low-voltage device 110 is connected, and an electric wire 3 connecting between the plug 1 and the outlet 2
A detecting unit 4 connected to the electric line 3 to detect a current flowing through the electric line 3 and an applied voltage;
An analysis operation unit 5 for analyzing the power supply quality of the power supply line 100 based on the detection signal, a storage unit 6 for storing the analysis result of the analysis operation unit 5, a plug unit 1 and a detection unit 4 A breaker 7 that is connected to the electric wire 3 during the current flow and interrupts the electric wire 3 when a current of a predetermined value or more flows in the electric wire 3, the electric wire 3, the detection unit 4, the analysis calculation unit 5, The main body case 10 houses the unit 6 and the breaker 7 therein and exposes and arranges the plug unit 1 and the outlet unit 2.

The plug 1 is connected to the outlet 10.
1 and an extension plug 12 extending from the exploration plug 11 to the main body case 10 and a connection for connecting a terminal of the extension cord 12 to a terminal of the electric wire path 3. A terminal 13 is provided. The electric wire path 3 includes positive and negative lines 31 and a ground line 32. The detection unit 4 includes a voltage detection unit 41 that is connected to each line 31 and detects a voltage applied to the electric line 3, and a voltage transformer 4 for detecting one of the lines 31.
The current detection unit 42 is mounted so as to penetrate the wire 2a and detects a current flowing through the electric wire 3.

An input / output terminal 1 for outputting an analysis result of the analysis operation unit 5 or a storage content of the storage unit 6 is provided in the main body case 10.
0a is provided, and an external recording device such as a printer 8 or a floppy drive is connected to the input / output terminal 10a. The printer 8 prints out the analysis result of the analysis operation unit 5 or the content stored in the storage unit 6, and the monitor display unit 9 displays data and waveforms as images.

Next, a description will be given of a power supply situation search operation of the power supply situation search apparatus according to this embodiment based on the above configuration. First, the low-voltage power converted to 100 V by the transformer 140 is supplied to the power supply line 131, the circuit breaker 130, and the power supply line 1.
21-Circuit breaker 120-Power supply line 100-Outlet 10
In order to investigate the power supply situation when the power is supplied to the low-voltage device 110 via the power supply path 1, the outlet 1
01, the device-side plug 111 of the low-voltage device 110 is removed, the plug-in 11 for exploration of the plug unit 1 is connected to the outlet 101, and the plug-in 111 of the low-voltage device 110 is plugged into the plug-in 21 for detection of the outlet unit 2. Connect.

When the breaker 7 is turned on in this connection state, the low-voltage power of 100 V is supplied to the low-voltage device 110, the voltage of the low-voltage power is detected by the voltage detection unit 41 of the detection unit 4, and the current is measured by the current transformer for the instrument. The current is changed by the detector 42a and the current detection unit 42 detects the current. Each of the detected signals of the detected voltage and current is input to the analysis operation unit 5, and the analysis operation unit 5 searches for the quality of the power supplied to the power supply path based on each detection signal.

The analysis operation unit 5 monitors voltage and current fluctuations, confirms apparent, effective, invalid, and power factor power consumption parameters, and monitors harmonic currents flowing out of various devices connected to the power supply path. Analyze and calculate confirmation. The calculated analysis result is stored in the storage unit 6, and can be output and displayed in real time from the connected printer 8 or monitor display unit 9.

Further, the analysis operation unit 5 can immediately determine the abnormality of the power supply condition based on the analysis result, and also stores the time when the power supply condition abnormality occurs and the time when it disappears in the storage unit 6. Can be. The maximum value or the minimum value from the point of occurrence of the abnormality of the power supply situation to the point of disappearance thereof and various waveforms during the period are also calculated and stored in the storage unit 6 and displayed on the monitor display unit 9.
By connecting a printer 8 other than this display, it is also possible to output with the printer 8 at the time of or after the search. Further, an external recording device such as a floppy disk or a memory card can be connected and output. Further, when the occurrence of the abnormality exceeds a predetermined set value, an alarm can be output to the outside from the alarm output terminal 41b by activating the alarm contact 41a by the control signal from the voltage detection unit 41.

The analysis operation unit 5 removes high frequency components equal to or higher than a predetermined frequency by using an anti-aliasing low-pass filter on each analog value detection signal input from the voltage detection unit 41 and the current detection unit 42. A / D
Then, based on the detection signal of the digital value, calculation of an effective value, an average value, a maximum value and the like is executed. The analysis calculation unit 5 calculates a fundamental component and a harmonic component by performing a fast Fourier transform process on the A / D-converted digital value detection signal, and calculates the content of the harmonic component with respect to the fundamental component. It can also be calculated.

In this way, it is possible to easily and quickly search for an abnormality in the power supply condition in the power supply path after the secondary side of the transformer 140, and to check the results of the search, such as current, voltage, power, and harmonics, in real time. Can output and display.

Even if a leakage or short circuit accident occurs between the outlet 101 and the low-voltage device 110 during the search for the power supply situation, the circuit breakers 120 and 130 are operated by operating the breaker 7. Will be able to deal with it. By operating the breaker 7 in this manner, it is possible to prove to the power consumer that no accident has occurred due to the power supply situation investigation.

(Second Embodiment of the Present Invention) Hereinafter, a power supply situation detecting device according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is an overall schematic configuration diagram of the power supply situation detecting device according to the present embodiment.

In the same figure, a power supply situation exploring apparatus according to the present embodiment has a plug section 1, an outlet section 2, an electric line 3, a detecting section 4, and an analyzing / calculating section 5 in substantially the same manner as the embodiment apparatus shown in FIG. , Storage unit 6 and body case 10 in common, and a voltage connection clamp 14 for detecting a voltage, a current connection clamp 15 for detecting a current, and connected to each end of the current connection clamp 15. , And a CT wiring 33 disposed in a linked state with the current transformer 162 in the current detecting section 42 of the detecting section 4. The voltage connection clamp 14 has a configuration in which one end is connected to voltage test terminals 163 a and 163 b of the instrument transformer 163, and the other end is connected to the voltage input terminals 14 a and 14 b of the main body case 10. The voltage input terminals 14 a and 14 b are connected to the connection terminals 13 in the main body case 10 by the extension cord 1.
2 and a switch 1 at each end of each of the positive and negative terminals 31
3a.

Next, an operation of searching for a power supply situation of the power supply situation detection apparatus according to the second embodiment will be described. First, high-voltage power is supplied to the high-voltage wiring path 165 via the disconnector (DS) 160 and the circuit breaker (CB) 161, and the instrument transformer 163 and the instrument current transformer 162 are arranged on the high-voltage wiring path 165. In this case, one end of the voltage connection clamp 14 is connected to the voltage test terminals 163a and 163b of the instrument transformer 163. In addition, one end of the current connection clamp 15 is connected to current test terminals 164a and 164b provided between the instrument current transformer 162 and the overcurrent relay (OC) 164. The other ends of the voltage connection clamp 14 and the current connection clamp 15 are connected to the voltage input terminals 14a and 14b and the current input terminal 15a of the main body case 10, respectively.
15b.

When the breaker 7 is turned on in this state, the voltage transformed by the instrument transformer 163 is applied to each of the positive and negative lines 31, and the instrument current transformer 16 is applied to the CT wiring 33.
The current detected at 2 is supplied. The voltage applied to each of the positive and negative lines 31 is detected by a voltage detector 41,
The current supplied to the wiring 33 is detected by the current detection unit 42. The voltage detection signal detected by the voltage detection unit 41 is converted in the analysis calculation unit 5 in accordance with the transformation ratio of the instrument transformer 163. Generally, 6600V is applied to the high voltage wiring path 165.
Is applied, 6600 V is also applied to the primary side of the instrument transformer 163, and 110 V is transformed and output from the secondary side. Therefore, conversion is performed by multiplying the voltage detection signal by the voltage transformation ratio 60. be able to.

The current detection signal detected by the current detection unit 42 is converted by the analysis and calculation unit 5 into a current transformer 162 for the instrument.
The high voltage current can be obtained by multiplying by the current transformation ratio. Voltage test terminals 163a, 1
Whether or not the connection directions of the 63b and the current test terminals 164a and 164b are proper is not guaranteed. Therefore, the suitability of the connection direction is output and displayed from the monitor display unit 9 as a message in the power flow direction based on the analysis result of the analysis operation unit 5. Whether the connection direction is appropriate or not is determined based on the message of the power flow direction. If the connection direction is inappropriate, the connections of the voltage test terminals 163a and 163b and the current test terminals 164a and 164b are inverted before shifting to the search operation. Connecting.

After confirming the proper connection as described above, the operation is shifted to the search operation, the power supply quality can be confirmed in the same manner as in the first embodiment, and the cause of the power supply abnormality and its state are analyzed. be able to.

[0026]

As described above, according to the present invention, a plug and an outlet for exploration are provided, and a current flowing through a line between the plug and the outlet for exploration or an applied voltage is detected by the detecting means. Since the analysis calculation means analyzes the power supply quality of the power supply line based on the detection signal, the exploration insertion plug is connected to the power supply line outlet, and the exploration outlet is provided at the end of the power cord of various low-voltage devices and the like. Therefore, it is possible to easily and quickly search the power supply quality of the power supply line. Further, in the present invention, since the analysis result of the analysis operation means is stored in the storage means or recorded in the external recording means, there is an effect that reconfirmation of the analysis result can be facilitated. Further, in the present invention, since the output unit outputs the analysis result of the analysis operation unit, there is an effect that the power supply quality of the power supply line can be immediately confirmed at the detection site. Further, in the present invention, since the overcurrent breaker is arranged between the exploration plug and the exploration outlet, the existing power supply line is accidentally caused during the exploration of the power supply line quality. The power supply can be cut off only for the low-voltage devices connected to the power supply line without erroneously operating the overcurrent breaker provided in the power supply circuit, and the power failure to other devices connected on the same circuit can be prevented. It has the effect of.

[Brief description of the drawings]

FIG. 1 is an overall schematic configuration diagram of a power supply situation investigation device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a search operation of the power supply situation search device shown in FIG. 1;

FIG. 3 is an overall schematic configuration diagram of a power supply situation investigation device according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a search operation of a conventional power supply condition search device.

[Description of Signs] 1 Plug section 2 Outlet section 3 Electric wire path 4 Detecting section 5 Analysis calculation section 6 Storage section 7 Breaker 8 Printer 9 Monitor display section 10 Main body case 10a Input / output terminal 11 Exploratory insertion plug 12 Extension cord 13 Connection terminal 13a Changeover Switch 14 Voltage Connection Clamp 14a, 14b Voltage Input Terminal 15 Current Connection Clamp 15a, 15b Current Input Terminal 21 Exploration Outlet 22 Output Terminal 31 Positive and Negative Lines 32 Ground Wire 33 CT Wiring 41 Voltage Detector 41a Alarm Contact 41b Alarm output terminal 42 Current detection unit 100, 121, 131, power line 101 outlet 110 low voltage device 111 device side plug 112 power cord 120, 130, 161 breaker 140 transformer 150 device body 151 connection clip 152 Connection CT 160 Disconnector 162 Instrument current transformer 163 Instrument transformer 163a, 163b Voltage test terminal 164 Overcurrent relay 164a, 164b Current test terminal 165 High voltage wiring path

Claims (4)

[Claims] 1. A power supply condition detecting device in which an outlet is provided on a power supply line and a power supply line for supplying power to a load by inserting a plug on a load side into the outlet is connected to the outlet. A search plug to be connected, a search outlet connecting the plug on the load side, and a current flowing through the line and / or being applied to a line between the search plug and the search outlet. A power supply situation exploring apparatus comprising: a detection unit that detects a voltage; and an analysis operation unit that analyzes power supply quality in the power supply line based on a detection signal output from the detection unit. 2. The power supply situation exploration apparatus according to claim 1, further comprising a storage unit for storing an analysis result of the analysis operation unit. 3. The power supply situation exploration apparatus according to claim 1, further comprising an output unit that outputs an analysis result of the analysis operation unit. 4. The power supply situation detecting apparatus according to claim 1, wherein an overcurrent breaker is disposed between the search insertion plug and the search outlet. Exploration equipment.