CN211182804U

CN211182804U - Grounding protection device

Info

Publication number: CN211182804U
Application number: CN201922338089.3U
Authority: CN
Inventors: 郑海军; 刘昱杰; 闫冬
Original assignee: Anze Branch Of Shanxi Local Power Co ltd
Current assignee: Anze Branch Of Shanxi Local Power Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-08-04
Anticipated expiration: 2029-12-24

Abstract

The grounding protection device comprises a circuit breaker, a bipolar knife switch and a display device, wherein the circuit breaker is installed in a low-voltage outlet comprehensive box, an upper terminal of the bipolar knife switch is electrically connected with the circuit breaker, a middle terminal of the bipolar knife switch is electrically connected with a low-voltage load, a lower terminal of the bipolar knife switch is electrically connected with a grounding wire, and the display device is fixed on the bipolar knife switch. The utility model discloses an earth connection is connected with the firm electricity of power supply side, has avoided traditional low pressure to be qualified for the next round of competitions the insecure that the earth connection connected mode outside the comprehensive case exists, and device nature phenomenon of violating the regulations such as unreliable, unsafe simultaneously because from taking ground protection device in the comprehensive incasement of low pressure, so the staff need not carry the earth connection by oneself again, and display device has also avoided staff's maloperation hidden danger to operating condition's explicit instruction moreover.

Description

Grounding protection device

Technical Field

The utility model relates to a ground protection device especially relates to a ground protection device that can realize reliable ground connection.

Background

With the development and progress of society, people have higher and higher dependence on power supply, and the low-voltage wire outlet comprehensive box in the current distribution station area mainly adopts an isolating switch matched with an air circuit breaker or a leakage protector to be wire outlet. When a low-voltage line needs to be overhauled or power failure occurs due to other reasons, a grounding wire needs to be arranged at the wire outlet of the low-voltage wire outlet comprehensive box, but because only the exposed electrified part at the wire outlet is only provided with the screw of the protector, and other parts are insulated, a worker can only electrically connect the grounding wire carried by the worker with the screw, so that the phenomena of insecurity, unreliability, insecurity and the like of the arranged grounding wire exist, the grounding wire arranged at the wire outlet side of the low-voltage wire outlet comprehensive box has the same nominal line, and has no due effect, and the phenomenon of device violation of regulations is formed.

Disclosure of Invention

The utility model aims at providing a ground protection device to it is insecure to solve traditional power supply medium and low voltage comprehensive case of being qualified for the next round of competitions side ground wire, device nature phenomenon of violating regulations such as unreliable, unsafe.

In order to solve the technical insufficiency, the utility model discloses a following technical scheme:

the grounding protection device comprises a circuit breaker, a bipolar knife switch and a display device, wherein the circuit breaker is installed in a low-voltage outlet comprehensive box, an upper terminal of the bipolar knife switch is electrically connected with the circuit breaker, a middle terminal of the bipolar knife switch is electrically connected with a low-voltage load, a lower terminal of the bipolar knife switch is electrically connected with a grounding wire, and the display device is fixed on the bipolar knife switch.

Preferably, the grounding wire is made of twenty-five square insulated soft copper wires.

Preferably, the display device has two display devices which are respectively fixed on two sides of the movable knife of the double-pole knife switch.

Ground protection device, owing to used above technical scheme, be qualified for the next round of competitions at the low pressure and synthesize incasement from taking ground protection device, the staff need not carry the earth connection by oneself again and carries out the on-the-spot electricity and connect, work efficiency has been improved, realized simultaneously that the earth connection is connected with the firm electricity of power supply side, the insecure of having avoided traditional low pressure to be qualified for the next round of competitions the earth connection connected mode of synthesizing case line side to exist, device nature phenomenon violating regulations such as unreliable, unsafe, display device has also avoided staff's maloperation hidden danger to operating condition's explicit instruction moreover.

Drawings

Fig. 1 is a schematic view of an ungrounded operation state of the ground protection device according to embodiment 1 of the present invention;

fig. 2 is a schematic diagram of a ground operation state of the ground protection device according to embodiment 1 of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following embodiments.

Example 1

Referring to fig. 1 and 2 together, a grounding protection device comprises a circuit breaker 1 installed in a low-voltage outlet comprehensive box, a bipolar knife switch 2 and a display device 3, wherein an upper terminal 21 of the bipolar knife switch is electrically connected with the circuit breaker 1, a middle terminal 22 of the knife switch is electrically connected with a low-voltage load 4, a lower terminal 23 of the knife switch is electrically connected with a grounding wire 5 of a twenty-five square insulated soft copper wire, and the grounding connection with a transformer is realized, in order to facilitate a worker to identify the working state of the grounding protection device, two display devices are fixed on two surfaces of a movable knife 24 of the bipolar knife switch, the display device of the embodiment adopts a button battery for power supply, the movable knife is moved up and down to trigger a power switch of the grounding protection device, the button battery and an insulating sheet on a power-on electrode can be driven by the movable knife, when the insulating sheet is inserted, the display state is stopped, the electric energy is saved, and when the insulation sheet is pulled out between the button cell and the electrified electrode, the display device works normally. As shown in fig. 1, when the grounding protection device is not in a grounding state, the display device displays "running" and "grounding" marks to prompt a worker to dial up the movable contact knife to be in a normal running state of the power supply, and dial down the movable contact knife to be in a grounding running state. As shown in fig. 2, when the ground protection device operates in a ground state, the display device displays "the operation of a person on the switching-on line is prohibited" to prevent the misoperation of the person.

In normal operation, power is supplied through the upper terminal of the double pole knife switch and is sent out from the middle terminal of the double pole knife switch. When a low-voltage line has a maintenance task, the outgoing line breaker is disconnected firstly only according to the low-voltage knife switch operation rule and the low-voltage knife switch operation order program, and then the movable contact knife of the double-pole knife switch is shifted from the upper side position to the lower side position to enter a reliable grounding state.

Ground protection device, from taking ground protection device in the comprehensive case of being qualified for the next round of competitions at the low pressure, the staff need not carry the earth connection by oneself again and carries out the on-the-spot electricity and connect, improved work efficiency, realized simultaneously that the earth connection is connected with the firm electricity of power supply side, avoided traditional low pressure to be qualified for the next round of competitions the insecure that the earth connection connected mode of comprehensive case play line side exists, device nature phenomenon violating regulations such as unreliable, unsafe, display device has avoided staff's maloperation hidden danger to operating condition's explicit instruction.

Claims

1. The grounding protection device is characterized by comprising a circuit breaker, a bipolar knife switch and a display device, wherein the circuit breaker is installed in a low-voltage outlet comprehensive box, an upper terminal of the bipolar knife switch is electrically connected with the circuit breaker, a middle terminal of the bipolar knife switch is electrically connected with a low-voltage load, a lower terminal of the bipolar knife switch is electrically connected with a grounding wire, and the display device is fixed on the bipolar knife switch.

2. The ground protection device of claim 1, wherein said ground wire is a twenty-five square insulated annealed copper wire.

3. The earth-fault protection device of claim 1, wherein said display means are two, each fixed to both sides of the moving knife of the double pole knife switch.