TWI765754B - With circuit arrangement for eliminating induced voltage - Google Patents

Abstract

The present invention relates to a circuit device capable of eliminating induced voltage, which can be electrically connected to a main load circuit. The circuit device includes a voltage elimination circuit, a switch circuit and a timing unit, wherein the timing unit can be connected to a first During the setting period, the main load circuit is in a working state, and the switch circuit is switched to the first state, so that the main load circuit is not electrically connected with the decompression circuit; the timing unit can make a second setting period The main load circuit is in a rest state, and the switch circuit is switched to a second state, so that the main load circuit is electrically connected to the decompression circuit, so that the induced voltage formed on the main load circuit can be conducted to depressurized ground without remaining on the main load circuit.

Description

With circuit arrangement for eliminating induced voltage

The present invention relates to a circuit device, in particular to a device capable of electrically connecting the main load circuit with a decompression circuit when the main load circuit is in a rest state, so as to conduct the induced voltage formed on the main load circuit to the main load circuit. Depressurize circuit devices at ground.

Press, when the metal conductor is at the ground potential, it does not show electrical properties, but when the metal conductor is in an electric field and is subjected to the action of the electric field force, and is insulated and separated from the ground potential, the charge on it It will be redistributed to form an induced voltage, that is, the induced voltage is induced by a strong electric field in a static state, and is formed by the accumulation of charges in an insulating state.

Generally speaking, the voltage value of the induced voltage on the overhead ground wire or coupled ground wire of a high-voltage transmission line will be related to the rated working voltage level of the line, the distance between phases, the arrangement of the wires, and the suspension height. In order to avoid induced voltage Threats to the personal safety of the staff working at heights. The staff usually take anti-static induction measures such as wearing electrostatic induction protective clothing and conductive shoes, or use grounding wires or personal security wires for reliable grounding or work in an equipotential manner. However, the aforementioned safety measures are all aimed at the staff on the high-voltage power tower. In fact, the current facilities adjacent to the high-voltage power tower (such as: orchards with lamps, street lamps on main roads, etc.) are not in use. (that is, in the resting state), the lines on it will also be affected by the strong electric field possessed by the high-voltage electrical tower, and an induced voltage will be formed. circuit, causing the user to be shocked and tingling and uncomfortable.

In order to solve the aforementioned problems, a common solution today is to use high-voltage electrical towers to increase the distance between the high-voltage cables and the lines of adjacent facilities, thereby reducing the generation probability of induced voltages. However, the aforementioned method is not only difficult and expensive to implement, but also requires a If a large number of high-voltage towers are adjusted at one time, the construction process will also have a great impact on the normal supply of electricity. Therefore, how to effectively solve the aforementioned problems becomes an important subject of the present invention.

In order to provide a better way to solve the induced voltage for the facilities adjacent to the high-voltage electrical tower, the inventor has finally developed and designed the circuit device with the ability to eliminate the induced voltage of the present invention after long-term research and experimentation. can effectively solve the aforementioned problems.

One object of the present invention is to provide a circuit device capable of eliminating induced voltage, which can be electrically connected to a main load circuit, and the main load circuit can provide power required for at least one load to operate, and the circuit device includes a Voltage circuit, a switch circuit and a timing unit, wherein, the voltage removal circuit can be electrically connected to a voltage removal ground; the switch circuit can be electrically connected to the main load circuit and the voltage removal circuit, respectively, in the voltage removal circuit When the switch circuit is switched to a first state, the main load circuit will not be electrically connected to the decompression circuit; when the switch circuit is switched to a second state, the main load circuit will be connected to the decompression circuit. The voltage circuit is electrically connected to each other; the timing unit can be electrically connected to the main load circuit and the switch circuit respectively, and the timing unit can make the main load circuit in a working state during a first setting period and make the switch circuit switching to the first state; and the timing unit can make the main load circuit in a rest state during a second setting period, and make the switch circuit switch to the second state. In this way, when the main load circuit is in a resting state, it will still maintain electrical connection with the decompression ground, so that the induced voltage formed thereon is conducted to the decompression ground, and will not remain on the main load circuit , in order to reduce or avoid the occurrence of electric shock to the user.

Optionally, during the first setting period, the main load circuit can receive external power to be in a working state; during the second setting period, the main load circuit cannot receive external power and is in a rest state.

Optionally, the circuit device further includes a voltage recording unit, which can be electrically connected to the main load circuit and can measure the voltage value on the main load circuit.

Optionally, the switch circuit at least includes a first switch, a relay, a first electromagnetic contactor, a second electromagnetic contactor and a first timer, and the decompression circuit at least includes a second timer. timer, and the relay, the first electromagnetic contactor, the second electromagnetic contactor, the first timer and the second timer respectively have a first contact and a second contact, and can be respectively Each of the first contacts and each of the second contacts are switched, and when the timing unit is in the second set period, the first switch is in an off state, so that a first contact of the relay is off state, and a second contact of the relay is in the adsorption state, so that a first contact of the first timer is disconnected, so that the first electromagnetic contactor stops operating, and a first contact of the first electromagnetic contactor The two contacts will form an adsorption state, so that the second timer is turned on after counting a set period, so that the main load circuit is connected to the decompression ground, and a first contact of the second timer is It can be turned on to activate the second electromagnetic contactor, so that a second contact of the second electromagnetic contactor is disconnected.

Optionally, when the timing unit is in the first set period, the first switch is in the adsorption state, so that the first contact of the relay is in the adsorption state, and the second contact of the relay is in the off state , so that the second contact of the second electromagnetic contactor is in the adsorption state, and the first timer counts another set period and then starts to conduct, so that the first contact of the first timer is in the adsorption state, The second contact of the first electromagnetic contactor is in a disconnected state, so that the main load circuit is not connected to the decompression ground.

Optionally, the set period counted by the second timer is 10 seconds.

Optionally, another set period counted by the first timer is 10 seconds.

Optionally, the voltage recording unit is provided with a serial data port whose specification standard is RS485.

Optionally, the circuit device further includes an electromagnetic contactor and at least one warning unit. When the circuit device is overloaded, the electromagnetic contactor will activate the warning unit and stop the operation of the circuit device.

Alternatively, the circuit arrangement can be integrated into an electrical control box.

In order to facilitate your examination committee to be able to further understand and understand the purpose of the present invention, technical features and effects thereof, the following examples are given to coordinate the drawings, and the detailed description is as follows:

[acquaintance]

none

[this invention]

1: Circuit device

11: Main load circuit

12: Decompression circuit

13: Switch circuit

14: Timing unit

A, B, C, D, E: Lines

L: load

T: first switch

Ry: relay

Ry/a, TX/a, TM/a: first contact

Ry/b, M1/b, M2/b: second contact

M1: The first electromagnetic contactor

M2: The second electromagnetic contactor

TM: first timer

TX: Second timer

M, MC: electromagnetic contactor

MS: Solenoid switch

OL: Thermal overcurrent relay

Y: warning unit

NFB: no fuse switch

V: control power

VR: Voltage recording unit

PP: FireWire

PS: ground wire

DF: fuse

[Fig. 1] is a block diagram of the circuit device of the present invention; [Fig. 2] is a schematic diagram of the circuit operation of the circuit device of the present invention; and [Fig. 3] is a schematic circuit diagram of the circuit device of the present invention integrated into an independent product .

In order to make the purpose, technical content and advantages of the present invention more clearly understood, the embodiments disclosed in the present invention will be described in further detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification, and the present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be based on different viewpoints and applications. , various modifications and changes can be made without departing from the concept of the present invention. It should be understood that the embodiments used anywhere in the description of this creation, including the use of any terms, are merely illustrative and in no way limit the scope and meaning of this creation or any term. Likewise, the present invention is not limited to the various embodiments disclosed in the specification. Although the terms first, second, or third, etc. may be used herein to describe various elements, each such element should not be limited by the foregoing terms, which are primarily used to distinguish one element from another and should not be used for any The elements impose any substantial limitations and should not limit the order in which the various elements may be assembled or arranged in practical application.

The present invention is a circuit device capable of eliminating induced voltage. Please refer to FIG. 1. The circuit device 1 can be electrically connected to a main load circuit 11, wherein the main load circuit 11 can receive external power and provide The power required for at least one load L (such as a light bulb) to operate. In an implementation scenario, the position of the main load circuit 11 can be close to a high-voltage electrical tower, and when the main load circuit 11 is in a rest state, the Affected by the high-voltage tower, an induced voltage will be generated. The aforementioned resting state refers to the situation in which the main load circuit 11 no longer receives external power and no longer provides power to the load L; in other words, when the main load circuit 11 The main load circuit 11 is in a working state when it can receive external power and provide power to the load L so that the load L can operate normally.

In addition, please refer to FIG. 1 again, the circuit device 1 includes a decompression circuit 12, a switch circuit 13 and a timing unit 14, wherein the decompression circuit 12 can be electrically connected to a decompression ground Therefore, when the decompression circuit 12 is electrically connected to the main load circuit 11 , the induced voltage of the main load circuit 11 will be eliminated through the decompression circuit 12 . The switch circuit 13 can be electrically connected to the main load circuit 11 and the decompression circuit 12 respectively, which can be an electromagnetic contactor or other circuits or components with switching capability. When the switch circuit 13 is switched to a first state , the main load circuit 11 will not be electrically connected to the decompression circuit 12 ; when the switch circuit 13 is switched to a second state, the main load circuit 11 will be electrically connected to the decompression circuit 12 .

On top of that, please refer to FIG. 1 again. The timing unit 14 can be electrically connected to the main load circuit 11 and the switch circuit 13 respectively. At 2 am, the main load circuit 11 is in the working state, and the switch circuit 13 is switched to the first state. After that, the timing unit 14 can be set during a second setting period, for example: 2 am to 7 am, The main load circuit 11 is in the rest state, and the switch circuit 13 is switched to the second state. In this way, when the main load circuit 11 is in the rest state, both the main load circuit 11 and the decompression circuit 12 can In the case of phase electrical connection, the induced voltage generated by the main load circuit 11 due to its proximity to the high-voltage electrical tower will be conducted to the decompression circuit 12 and finally grounded, so that the main load circuit 11 will no longer remain on the main load circuit 11. There is an induced voltage to prevent people from being shocked by accidentally touching the main load circuit 11 .

Circuits A, B, C, D, E and the electronic components on them are used to illustrate the circuit operation mode of the circuit device 1. It is specially stated here that those skilled in the art can design specific circuits through the subsequent circuit operation methods. Therefore, as long as the circuit structure conforms to the following description, it belongs to the circuit device 1 in the present invention. Please refer to FIG. 2, in one embodiment, the lines A, B, C, D, and E can receive a control power supply V, and the line D can be electrically connected to the decompression ground, wherein the control power supply V The voltage between the live wire PP and the ground wire PS is 110 volts (V), and the live wire PP is also connected to a fuse DF, and the rated current of the fuse DF is 2 amperes (A). When the main load circuit 11 is in the working state, the line B needs to be kept on, but the line D cannot be turned on; on the contrary, when the main load circuit 11 is in the rest state, the line B cannot be turned on, and the line D needs to be kept on. In addition, the electronic components such as the relay Ry, the first electromagnetic contactor M1, the second electromagnetic contactor M2, the first timer TM and the second timer TX used on the circuits A, B, C, D, and E are all have a first contact point and a second contact point respectively, and can connect the first contact point and the second contact point For the convenience of explanation, only the electronic components and contacts that will affect the conduction of the line are marked in the second figure, and they will be described first.

Continuing from the above, please refer to Figures 1 and 2. When the timing unit 14 is in the first set period (eg: 10:00 pm to 2:00 am), it will make the first switch T of line A in the adsorption state (or called on), so that the relay Ry can be excited, so that its first contact Ry/a is in an adsorption state, and its second contact Ry/b is in an off state. In addition, after the first contact Ry/a of the relay Ry is in the suction state, the second contact M2/b of the second electromagnetic contactor M2 will maintain the original suction state because it is not excited. After that, the first timing The device TM can count a set period (for example: 10 seconds) and then start conducting, so that the line B is in a conducting state. In addition, when the first timer TM is turned on, the first contact TM/a of the first timer TM will be in the adsorption state, so as to activate the first electromagnetic contactor M1, so that the second contact M1/b of the first electromagnetic contactor M1 It is disconnected to ensure that the line D will not be turned on. In this way, it can be ensured that the main load circuit 11 will not be turned on with the decompression ground.

Please refer to Figures 1 and 2 again, when the timing unit 14 is in the second set period (eg: 2:00 am to 7:00 am), it will make the first switch T of line A to be in an off state, so that The relay Ry stops operating, so that its first contact Ry/a is in an off state, and its second contact Ry/b is in an adsorption state. In addition, when the relay Ry no longer operates (that is, the first contact Ry/a is disconnected), the circuit B will be in an open circuit state, and the first contact TM/a of the first timer TM will also be disconnected. The operation of the first electromagnetic contactor M1 is stopped, causing the circuit C to be in an open-circuit state. When the first electromagnetic contactor M1 stops operating, the second contact M1/b of the first electromagnetic contactor M1 will form an adsorption state, and the second timer TX will count a set period (eg 10 seconds) and then start conduction , so that the line D is in a conducting state, so that the main load circuit 11 is connected to the decompression ground, so that the induced voltage on the main load circuit 11 can be conducted to the decompression ground. When the second timer TX is turned on, its first contact TX/a will be turned on to activate the second electromagnetic contactor M2, so that the second contact M2/b of the second electromagnetic contactor M2 is in an off state, so , it can be ensured that when the main load circuit 11 is in conduction with the decompression ground, the line B is in a state of non-conduction.

In addition, a thermal overcurrent relay (Thermal overload relay) OL can be electrically connected to the first electromagnetic contactor M1, when an overload situation occurs, the thermal overcurrent relay OL will be switched, so that the warning unit Y (such as : LED light) is activated (eg: lit), and the circuit can be stopped at the same time Device 1 operates to avoid danger. Referring to FIG. 3, in one embodiment, the circuit device 1 can be integrated into an independent product, for example, an electrical control box, wherein an electromagnetic switch MS can be electrically connected to the timing unit 14, and can Electrically connected to the main load circuit 11 and another electromagnetic contactor M located outside the electrical control box, the electromagnetic switch MS can include the related circuits of the first electromagnetic contactor M1 in FIG. 2 and the thermal overcurrent relay OL, And as shown in FIG. 3 , a non-fuse switch NFB can also be provided between the electromagnetic switch MS and the main load circuit 11 . An electromagnetic contactor MC can be electrically connected to the electromagnetic switch MS, and can be electrically connected to the decompression ground, the electromagnetic contactor MC can include the relevant circuit of the second electromagnetic contactor M2 in FIG. 2, and when the When the electromagnetic switch MS, the electromagnetic contactor MC and the decompression grounding place are kept in a conducting state, the induced voltage on the main load circuit 11 will be directed to the decompression grounding place. In addition, a voltage recording unit VR can be added to the electrical control box, and the voltage recording unit VR can be electrically connected to the main load circuit 11 to measure and record the voltage value on the main load circuit 11, and the voltage The recording unit VR is provided with a serial data port whose specification is RS485. Therefore, the voltage recording unit VR can be connected to an external device (such as a computer) through a transmission line to transmit the measured and recorded voltage value information to the the external device.

To sum up, the present invention uses the circuit device 1 as a bridge between the main load circuit 11 and the decompression ground, and when the main load circuit 11 is in a rest state, the main load circuit 11 and the decompression ground are connected. The phases are electrically connected, thereby eliminating the induced voltage on the main load circuit 11 . Compared with the conventional method of erecting high and high-voltage electrical towers, the overall cost and operation time of the present invention are obviously lower and more convenient.

According to the above, it is only a preferred embodiment of the present invention, but the scope of the rights claimed by the present invention is not limited to this. The equivalent changes that can be easily considered should all belong to the protection scope of the present invention.

1: Circuit device

11: Main load circuit

12: Decompression circuit

13: Switch circuit

14: Timing unit

L: load

Claims (9)

A circuit device capable of eliminating induced voltage, which can be electrically connected to a main load circuit, and the main load circuit can provide the power required for at least one load to operate, the circuit device comprises: a voltage elimination circuit, which is electrically connected to a decompression ground; a switch circuit, which is electrically connected to the main load circuit and the decompression circuit, respectively, the switch circuit at least includes a first switch, a relay, a first electromagnetic contactor, and a second electromagnetic A contactor and a first timer, the decompression circuit at least includes a second timer, and the relay, the first electromagnetic contactor, the second electromagnetic contactor, the first timer and the second timer The device has a first contact and a second contact respectively, and can be switched between the first contact and the second contact respectively. When the switch circuit is switched to a first state, the main The load circuit will not be electrically connected to the decompression circuit; when the switch circuit is switched to a second state, the main load circuit will be electrically connected to the decompression circuit; and a timing unit, respectively electrically Connected to the main load circuit and the switch circuit, the timing unit can make the main load circuit in a working state during a first setting period, and make the switch circuit switch to the first state; the timing unit can be in a first setting period. During the second setting period, the main load circuit is in a rest state, and the switch circuit is switched to the second state. When the timing unit is in the second setting period, the first switch is in an off state, so that the A first contact of the relay is in an open state, and a second contact of the relay is in an adsorption state, so that a first contact of the first timer is disconnected, so that the first electromagnetic contactor stops operating, And a second contact of the first electromagnetic contactor will form an adsorption state, so that the second timer counts a set period and then starts to conduct, so that the main load circuit and the decompression ground are conducted, and the A first contact of the second timer can be turned on to activate the second electromagnetic contactor, so that a second contact of the second electromagnetic contactor is disconnected. The circuit device of claim 1, wherein during the first setting period, the main load circuit can receive external power to be in a working state; during the second setting period, the main load circuit cannot receive external power, so as to at rest. The circuit device of claim 1, further comprising a voltage recording unit, which can be electrically connected to the main load circuit and can measure the voltage value on the main load circuit. The circuit device of claim 1, wherein when the timing unit is in a first setting period, the first switch is in a suction state, so that the first contact of the relay is in a suction state, and the relay's The second contact is in the off state, so that the second contact of the second electromagnetic contactor is in the adsorption state, and the first timer counts another set period and then starts to conduct, so that the first timer is turned on. The first contact is in the adsorption state, so that the second contact of the first electromagnetic contactor is in the disconnected state, so that the main load circuit is not connected to the decompression ground. The circuit device of claim 1, wherein the set period counted by the second timer is 10 seconds. The circuit device of claim 4, wherein another set period counted by the first timer is 10 seconds. The circuit device of claim 3, wherein the voltage recording unit is provided with a serial data port whose specification standard is RS485. The circuit device according to claim 1, further comprising an electromagnetic contactor and at least one warning unit. When the circuit device is overloaded, the electromagnetic contactor will activate the warning unit and stop the operation of the circuit device. The circuit arrangement as claimed in claim 1 can be integrated into an electrical control box.

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