CN204089012U - A kind of armored mid-set metal closed switch cabinet earthing device - Google Patents

Abstract

The utility model discloses a grounding device for an armored middle-mounted metal-enclosed switchgear, which includes a device body (5), and is characterized in that a moving roller (6) is arranged at the lower end of the device body (5), and the device body (5) passes through The lead screw (7) is connected to the manual crank (1), the manual crank (1) is connected to the locking box (11), the upper end of the device body (5) is connected to the sensor (3), and the sensor (3) is respectively connected to the moving contact ( 2), the induction lamp (4), the induction lamp (4) is connected to the test terminal clamp (9), the test terminal clamp (9) is connected to the grounding wire (8), and the grounding wire (8) is connected to the device body (5), the utility model It can complete the safe and reliable electrical inspection and grounding of the busbar in the armored middle-mounted switch cabinet, ensuring the accuracy of the test measurement data, reducing the power outage time, eliminating potential safety hazards, improving the reliability of power supply, and ensuring the personal safety of maintenance personnel .

Description

A grounding device for an armored mid-mounted metal-enclosed switchgear

Technical field:

The utility model relates to a grounding device for an armored middle-mounted metal-enclosed switchgear, which belongs to the technical field of electric power system substation maintenance.

Background technique:

The 10kV armored middle-mounted metal-enclosed switchgear is a cabinet-type electrical equipment that uses air insulation to integrate busbars, circuit breakers, CTs, PTs, lightning arresters, grounding switches and other transformation equipment in a closed space. It has been widely used due to its reasonable structural design, good protection performance, strong breaking capacity, good dynamic and thermal stability, strong interchangeability, and convenient use and maintenance.

However, when the operator conducts electrical inspection and grounding of the busbar in the armored central metal-enclosed switchgear during the power outage operation of the equipment, there is no point that can safely and reliably conduct electrical inspection and grounding. If it is hooked to the static contact in the switch cabinet, it violates the provisions of Article 4.5.4 of the "State Grid Corporation of Electricity Safety Work Regulations (Transformation Part)": "After the handcart in the high-voltage switch cabinet is pulled out, isolate the It is prohibited to open the baffle of the live part after it is closed”; if the cover plate of the busbar room of the switchgear is opened, the outer layer of the busbar in the switchgear is baked and covered with heat-shrinkable material in order to increase the withstand voltage level, and the joints are also covered with heat-shrinkable contacts. The head box is closed, so there is no reasonable hooking place for the grounding wire, and the grounding wire is easy to fall off, which brings great safety hazards to the operator's electrical inspection and maintenance personnel's inspection process. At the same time, when the bus bar of the armored middle-mounted closed switchgear and its affiliated equipment are subjected to high-voltage tests and primary nuclear equivalent work, because the contacts in the cabinet are designed in a round shape, the clamps are not fixed reliably during the test, which cannot ensure the safety and security of the equipment during the test. Accuracy of test data.

Utility model content:

The purpose of this utility model is to overcome the deficiencies of the above-mentioned prior art and provide a safe and reliable electric inspection and grounding of the busbar in the armored middle-mounted switch cabinet, which ensures the accuracy of the test measurement data and reduces the power outage time. Eliminate safety hazards, improve the reliability of power supply, and ensure the personal safety of maintenance personnel. The grounding device of the armored central metal-enclosed switchgear.

The purpose of this utility model can be achieved through the following measures: a grounding device for an armored middle-mounted metal-enclosed switchgear, which includes a device body, which is characterized in that the lower end of the device body is provided with a moving roller, and the device body is connected to the hand through a lead screw in and out. The crank handle, the manual crank handle are connected to the locking box, the upper end of the device body is connected to the sensor, the sensor is respectively connected to the moving contact, the sensor lamp, the sensor lamp is connected to the test terminal clamp, the test terminal clamp is connected to the ground wire, and the ground wire is connected to the device body.

Compared with the prior art, the utility model can produce the following positive effects: the utility model is a detachable grounding device, which can meet the use requirements of armored middle-mounted closed switch cabinets of different specifications, and can complete the busbar electric inspection in a reasonable and orderly manner. , Grounding, test measurement, rigorous steps, high safety.

1. By installing a sensor on the moving contact, it can activate the charged warning light and terminate the operation when the equipment is charged.

2. By extending the live part of the equipment, the electroscope pen can directly verify whether the equipment is live, with high safety, easy operation and short time consumption.

3. Add a grounding clamp to reliably ground the cabinet, which is reliable in fixing, convenient in operation, simple in manufacture, safe and reliable.

4. By adding and fixing special test terminal clamps, the contact is reliable and the test data is more accurate.

The utility model can safely and effectively test the electricity of the equipment, and complete the grounding measures of the equipment. This utility model solves the problem of power inspection and grounding safety measures for the busbar of armored middle-mounted metal-enclosed switchgear, eliminates potential safety hazards, ensures the accuracy of test and measurement data, reduces power outage time, and improves the reliability of the company's power supply It ensures the personal safety of maintenance personnel.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

The specific embodiment: below in conjunction with accompanying drawing, the best embodiment of the present utility model is described in detail:

Embodiment: A grounding device for an armored mid-mounted metal-enclosed switchgear (see Figure 1), which includes a device body 5, the lower end of which is provided with a moving roller 6, and the lower part of the device body 5 is connected to the hand through an incoming and outgoing screw 7. The shaking handle 1 and the manual cranking handle 1 are connected to the locking box 11, and the upper end of the device body 5 is connected to the sensor 3, and the sensor 3 is respectively connected to the moving contact 2 and the sensor lamp 4; the sensor lamp 4 is connected to the test wiring clip 9 and the test wiring clip 9 is connected to the ground The wire 8 and the ground wire 8 are connected to the lower end of the device body 5 .

After the equipment and busbar power outage, the operating personnel will place the grounding device of the switchgear in the switchgear, lock the lock box 11 and the switchgear, and then shake the manual handle 1, at which time the lock box 11 does not move, and the in and out screw 7 is connected to the switchgear. The nuts in the switch cabinet are occluded, and the moving roller 16 is driven by rotating the manual handle 1 to the right, and the grounding device body 5 is rocked in. When shaking in, when the moving contact 2 is close to the static contact in the cabinet, if the static contact is electrified, the sensor 3 will sense the electrification, and the induction lamp 4 will flash for warning, indicating that the cabinet is electrified, and the grounding device must not enter. If the sensor 3 does not operate and the induction lamp 4 does not light up, you can continue to shake in the grounding device. After shaking in, use an electroscope to test the electricity. After there is no voltage, short the grounding wire 8 for three phases, and the grounding card slot 10 is connected to the main switch cabinet. The grounding is stuck, the connection is reliable, and the electrical inspection and grounding work is completed. If it is necessary to do a high-voltage test on the busbar in the cabinet, the grounding wire 8 is released, and the test equipment is connected through the test terminal clamp 9 to complete the relevant test work and ensure the accuracy of the measurement data.

Claims (1)

1. A grounding device for an armored mid-mounted metal-enclosed switchgear, which includes a device body (5), characterized in that the lower end of the device body (5) is provided with a moving roller (6), and the device body (5) passes through the lead screw (7) Connect the manual crank (1), the manual crank (1) is connected to the locking box (11), the upper end of the device body (5) is connected to the sensor (3), and the sensor (3) is respectively connected to the moving contact (2), The induction lamp (4), the induction lamp (4) is connected to the test terminal clamp (9), the test terminal clamp (9) is connected to the grounding wire (8), and the grounding wire (8) is connected to the device body (5).