JPS638431B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When construction of high-voltage distribution lines is carried out using the bypass construction method, the present invention provides information on whether or not voltage is applied to the power supply side and load side terminals of a bypass switch installed in a bypass circuit. This invention relates to a checker for checking whether or not the phases of applied voltages match or do not match, and whether or not electricity is flowing.

Conventionally, such inspections have been carried out by having an inspector climb up to a high point on a utility pole to which a switch is attached, and connect a measuring device to each terminal of the switch at that high point. However, this type of work requires climbing the pole and connecting the measuring device each time, which takes time. Also, since the work involves climbing to a high point on a pole where many electric wires are congested, it may be difficult to accidentally climb the pole. There were various problems such as the risk of electric shock caused by touching the electric wires.

SUMMARY OF THE INVENTION Therefore, the present invention seeks to provide a bypass circuit checker which can solve the above-mentioned problems, that is, a bypass circuit checker which can perform the above-mentioned inspection quickly and safely while on the ground.

The drawings showing the embodiments of the present application will be described below. In FIG. 1, 1 is a utility pole, 2 is an armrest, 3 is a high-voltage distribution line, 4 is a bypass switch, and 5 is a bypass circuit distribution line connected to the bypass switch 4 to form a bypass circuit. Reference numeral 7 indicates the main body of the bypass switch checker, which is attached to the bottom surface of the bypass switch 4. 8 shows a transmitter in the bypass switch checker.

Next, in FIG. 2 showing the members attached to the outer surface of the main body 7, and FIG. 3 showing the connection relationship between the circuit described later and the bypass switch 4 in the main body 7,
10A, 10B, and 10C shown in FIG. 3 indicate the terminals on the power supply side of the bypass switch 4, and the alphanumeric characters A, B, and C attached thereto indicate A phase and B phase, respectively.
This indicates that the terminal is connected to the bypass circuit power distribution line 5 of the phase and C phases. In addition, in the drawings, the appended letters A,
B and C also indicate that each member corresponds to phase A, phase B, and phase C, respectively, and these alphanumeric symbols are omitted in this specification unless it is particularly necessary. I will explain. Reference numeral 11 indicates a terminal on the load side of the bypass switch 4, and reference numeral 12 also indicates a contact point. Next, reference numeral 13 shown in FIG. 2 indicates a housing of the main body 7 of the checker, which is made of a metal material. Among the members attached to the lower surface of the housing 13, numeral 14 is a light emitting body for detecting voltage, and is designed to indicate whether or not a voltage is being applied to the terminal 10 on the power supply side of the switch 4. Reference numeral 15 indicates that the light emitters 14A, 14B, and 14C are connected to the power supply side terminals 10A, 10B, and 10C in the bypass switch 4, respectively.
This is a display member to indicate that the product corresponds to the above, and for example, it is marked with the letters "A", "B", and "C", or it is color coded into black, red, and white. 16
Reference numeral 17 is a light-emitting body for voltage detection that indicates the presence or absence of voltage application to the terminal 11 on the load side of the switch 4, and 17 is a display member that is attached for the same purpose as the display member 15. be. 18 is a light emitter for phase detection, and 19 is a light emitter for energization indication. Next, reference numerals 20, 21, and 22 shown in FIG. 3 indicate the connection ends of the first to third blocks in the circuit, which will be described later, provided in the housing 13, respectively, and as shown in FIG. Connector 2 attached to housing 13
3. Connector 2 detachably connected to connector 23
4 and a cord 25 connected to the connector 24 to the bypass switch 4 . That is, the connection end 20 of the first block is connected to the power supply side terminal 10 via the above-mentioned member and capacitor 26 so that voltage application to the power supply side terminal can be detected, and the connection end 21 of the second block is connected to the load side terminal. The connection end 22 of the third block is attached to the load side terminal 11 via the above member and the capacitor 27 so as to be able to detect voltage application, and the connection end 22 of the third block is attached to the load side terminal 11 via the above member so that the energization state can be detected. are connected to the current transformers 28, respectively.

Next, FIG. 4 showing a circuit arranged in the housing 18 and FIG. 5 showing a specific example of the circuit will be described. First, in the voltage detection and phase detection circuit 29, 30,
30' is an impedance conversion circuit, and 31 and 31' are Schmitt circuits, which are designed to send out signals of the same height (voltage) when the voltage of the input signal reaches a certain level. 32, 32' are integrating circuits, and the signals from Schmitt circuits 31, 31' are
Because it is a 60Hz (or 50Hz) pulse signal,
It is provided to convert this into a sawtooth waveform. 33, 33' are detection circuits, and integration circuit 3
The light emitters 14A and 16A are provided so as to light up the light emitters 14A and 16A when the signals from 2 and 32' exceed a certain voltage. Reference numeral 34 denotes an AND gate circuit, which is configured to produce an output when the signals from both Schmitt circuits 31 and 31' are input together.
Reference numeral 35 denotes an integrating circuit, which converts a pulse signal into a sawtooth waveform like the integrating circuits 32 and 32'. 36 is a detection circuit which operates in the same manner as the detection circuits 33 and 33'.

Although not shown in the drawings, voltage detection phase detection circuits having the same configuration as above are also provided for the B phase and C phase, and these are similarly arranged within the housing 13.

Next, in the energization display circuit 37, 38 is a rectifier circuit, and a bridge type one is used. 39
is an OR gate circuit, and at least one rectifier circuit 3
When the input from 8 is received, an output is generated and a light emitting body 19 for indicating energization is turned on.
As shown in FIG. 5, a latch relay 60 is connected to the DC output end of the rectifier circuit 38, and a contact 61 of the relay is interposed on the input side of the OR gate circuit 39, so that the relay 60 is once activated. After that, the contact 61 remains open, so that no input is input to the OR gate circuit 39. Reference numeral 40 denotes a pulse conversion circuit, which is configured to generate an output for a certain short time (for example, 0.3 seconds, which is enough time for the next counter to operate) when an output is generated in the OR gate circuit 39. 41 is the counter,
Each time there is an output from the pulse conversion circuit 40, it is counted.

Next, reference numeral 42 denotes a flicker circuit, which is provided so that each of the light emitters as described above is lit by blinking at fixed time intervals (for example, every 0.5 seconds). Reference numeral 43 indicates a power source, and a dry battery is used as an example. 44 indicates a power switch. Reference numeral 45 indicates a light emitting body inspection circuit, and numeral 46 indicates a light emitting body inspection switch. By closing the light emission body inspection switch 46, all the light emitters can be inspected directly (through various circuits as described above). It is configured so that all bulbs will light up continuously as long as they are connected to a power source (without burning out) and the bulbs are not burnt out. 4
Reference numeral 7 denotes a detection circuit for checking the power supply, and 48 denotes the same light emitting body. These are constructed so that the light emitting body 48 lights up when the voltage of the power supply 43 is equal to or higher than a specified value.
Note that 49 shown in FIG. 5 is a manual switch for the check operation.

Next, 51 is a receiver, which is configured to receive a signal from the transmitter 8 and send the control signal to the control circuit 52. The control circuit 52 is provided to operate the power switch 44 and the light emitting body inspection switch 46, and is connected to the receiver 5.
In response to the signal from 1, the switches 44 and 46
They are constructed so that they can be opened and closed individually.
The transmitter 8 also includes the switch 44, as described above.
46 are configured to send out two types of signals that can be operated individually.

Note that 50 shown in FIG. 5 indicates a manual power switch.

Next, the usage and operation of the above configuration will be explained. The main body 7 of the checker configured as described above is attached to the lower surface of the bypass switch 4 with a fitting not shown, and the cord 25 extending from the switch 4 is attached to the lower surface of the bypass switch 4.
A connecting tool 24 at the tip of is connected to a connecting tool 23 provided on the main body 7. There is also a manual power switch 50
is closed. Incidentally, such mounting and closing of the power switch 50 may be performed at any time, in addition to being performed incidentally when the bypass switch 4 is installed on the utility pole.

Next, the operation of voltage detection and phase detection will be explained. In this case, the operating waveforms of each part of the circuit when the circuit of FIG. 5 operates are shown in FIG. First, prior to these inspections, the transmitter 8 transmits an operation signal for inspecting the light emitting body. Then, the receiver 51 in the main body 7 receives this, the control circuit 52 operates, and the light emitting body inspection switch 46 is closed. Then, the power source 43 and each light emitter are directly connected via the inspection circuit 45, and all the light emitters except the power supply check light emitter 48 are lit continuously, confirming that there is no abnormality in them. .

Next, once the inspection is completed, the transmitter 8 sends
Sends operation signals to perform voltage detection, phase detection, and energization display. Then, the receiver 51 receives this,
Control circuit 52 operates to open switch 46 and close switch 44. In this state, if a voltage is applied to the power supply and load side terminals 10 and 11 of the bypass switch 4, respectively, the voltage enters the connection ends 20 and 21 via the capacitors 26 and 27. This signal is input to the Schmitt circuits 31 and 31' via the impedance conversion circuits 30 and 30'.
A pulse signal is output from 1 and 31'. This pulse signal is converted into a sawtooth wave by the integrating circuits 32, 32', and is input to the detection circuits 33, 33'.
If the specified voltage is applied to the terminals 10 and 11 of the switch 4 as described above, the detection circuits 33 and 33'
Since the voltage input to the light emitter 1 is higher than the above-mentioned constant voltage value,
An output is sent that causes lights 4 and 16 to light up. As a result, the light emitters 14 and 16 blink at a period prescribed by the flicker circuit 42.

At the same time, the Schmitt circuit 31, 3'1
The output is input to the AND gate circuit 34. In this case, if the voltages applied to the terminals 10 and 11 match each other, both Schmitt circuits 31 and 3
Since the phases of the signals from 1' also overlap, the AND gate circuit 34 produces an output. Then, this output is integrated by an integrating circuit 35 and then inputted to a detection circuit 36, and an output for lighting the light emitter 18 is sent from the detection circuit 36. As a result, the light emitter 18 blinks at a period prescribed by the flicker circuit 42.

Note that even when the voltages applied to both terminals 10 and 11 are not in phase, both Schmitt circuits 3
The output pulses from 1 and 31' partially overlap, and only when they overlap, the AND gate circuit 34 produces an output. However, since the pulse width of the output signal (pulse signal) is narrow, the voltage after it is integrated becomes low and does not reach the constant value set in the detection circuit 36. Therefore, the light emitter 18 does not light up.

In this way, if voltage is applied to both terminals 10 and 11 of the bypass switch, and the phases of the voltages applied to both terminals 10 and 11 match, all of the light emitters 14, 16, and 18 will blink. do.
Since these light emitters 14, 16, and 18 are attached to the bottom surface of the casing 13 of the main body 7, the inspector can clearly confirm that they are lit, as shown in FIG.

When voltage is applied as described above and it is confirmed that the phases of the applied voltages match, the bypass switch 4 is closed. When current flows through the bypass switch 4 due to this turning on, it is displayed by the light emitting body 19 for indicating energization.
Its operation is performed as described below.

When the above current flows, it flows through the current transformer 28
The current transformer produces an output. Note that the current transformer 28 is inserted into two phases (in this example, A phase and C phase), so even if there is a phase that is not energized in the case of single-phase current, at least one current transformer is used to Current is detected. The detected signal is at the connection end 22
is input. This signal is rectified by a rectifier circuit 38 and input to an OR gate circuit 39, which produces an output. As a result, the light emitter 1
9 blinks at a period prescribed by the flicker circuit 42.

The output of the OR gate circuit 39 is also input to a pulse conversion circuit 40, and a counter 41 counts the number of times energization is performed.

When detecting and displaying energization as described above, if a short circuit current flows through the bypass switch 4, the latch relay 60 is activated and its contact 6
1 is released. Therefore, the light emitter 19 will not light up again after that. This notifies the inspector that a short-circuit current has flowed and prompts the inspector to replace the cable or switch. The current at which the above operation is performed is set to about 4000A, for example.

Although a light emitting diode is used as the light emitter in this embodiment, any other light emitter (for example, an incandescent light bulb) may be used. Moreover, any configuration other than that shown in FIG. 5 can be used as the configuration of each circuit as long as it performs the same function. Further, the current transformer 28 may be attached to a terminal on the power supply side.

Furthermore, as the lighting method of the light emitter, any other arbitrary method may be used instead of blinking as in this example.

Furthermore, if all of the light-emitting bodies for voltage detection are lit, but one or more light-emitting bodies for phase detection are not lit, this may be notified by an alarm buzzer.

Furthermore, when the main body of this checker is attached to a large number of switches and these are operated wirelessly with one transmitter, it is possible to control only the target main body by encoding the transmitted signal, etc. It's good to do this.

As described above, in the present invention, it is possible to check whether voltage is applied to the power source and load side terminals of the bypass switch, and to match the phases of the voltages applied to both terminals. When testing whether the light is on or not, and whether there is current flowing between both terminals, these can all be done by checking that the light emitter is lit, making it possible to perform the test extremely quickly. It has its features.

Moreover, in this case, even if the light emitting body does not light up (for example, when voltage is applied but the light emitting body does not light up due to a burnout bulb), the light emitting body is Since this can be directly connected to the power supply, opening and closing this inspection switch will allow you to determine whether the above-mentioned illuminant does not light up due to a malfunction of this checker, or whether voltage is originally being applied to the terminal. It is possible to investigate the cause of the problem, which is thought to be due to a non-existent reason, and has the effect of increasing the accuracy of the above-mentioned tests.

Furthermore, even if the inspection is made possible as described above, the operation can be done by remote control using radio, so a switch is installed in each case. It has the advantage of being able to work while staying on the ground without having to climb a telephone pole. This makes it possible to speed up the work by quickly completing this type of inspection, which is generally done before switching on the switch to supply power (i.e., minimizing the duration of the power outage).
It has a great effect on quickly supplying electricity to electricity consumers, and also ensures work safety by eliminating the need to lean between live wires congested on utility poles. There is a potential effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a perspective view showing the working state, FIG. 2 is a bottom view of the checker body, FIG. 3 is a diagram showing the connection relationship between the bypass switch and the checker, and FIG. Figure 4 is a block circuit diagram of the checker, Figure 5 is a diagram showing an example of the circuit, and Figure 6 is a diagram showing an example of the circuit.
The figure shows the operating waveforms of each part. 4... Bypass switch, 7... Main body, 8... Transmitter, 14, 16... Luminous body for voltage detection, 18... Luminous body for phase detection, 19... Luminous body for energization indication, 44...
. . . Power switch, 46 . . . Light emitting body inspection switch, 51 . . . Receiver, 52 .

Claims (1)

[Claims] 1 The main body has a connection end of the first block for detecting voltage application to the power supply side terminal, which can be connected to the power supply side terminal of the bypass switch, and a connection end of the first block for detecting voltage application to the power supply side terminal, which can be connected to the load side terminal of the bypass switch. The connection end of the second block for detecting the voltage application to the load side terminal, which was made to be connected to the load side terminal, and the third block for detecting the energization state, which was able to be connected to the current transformer attached to the switch. The main body is further provided with a light emitting body for voltage detection connected to the connection ends of the first and second blocks, and a light emitting body connected to the connection ends of the first and second blocks. a luminous body for phase detection;
The main body further includes a power source connected to the light emitting body via a power switch, and the main body further includes: A circuit is interposed between each of the light emitters and the power source to directly connect the two via a switch for inspecting the light emitters, and a transmitter is provided in the main body. and a control circuit for individually controlling the opening and closing of a power switch and a switch for inspecting a light emitting device, which are connected to the receiver.