Factory Price Pre Installed Safety Fast Grounding Device Dgjd

• Customization: Available
• Breaking Capacity: High
• Type: Expulsion Drop-out
• Model NO.: DGJD
• Usage: High Voltage
• Fusing Speed: FF
• Fusing Device: Fuse Holder
• Standard: IEC/ANSI/IEEE
• Voltage: 10-38kv
• Altitude: ≤3000
• Pollution Level: E
• Ice Thickness: 20
• Transport Package: Export Carton
• Trademark: DGG
• Origin: China
• Production Capacity: 500, 000

Product Description

PHOTOS OF PRODUCT

SUMMARY

 

1. The design and development of DGJD type pre-installed safety fast grounding device are mainly to solve the following problems:

1. In order to solve the heavy task of installing temporary grounding wires on overhead distribution lines at ordinary times, so that operators do not need to carry heavy temporary grounding wires to climb mountains and wade across rivers, reducing the labor intensity of operators;
2. The knife switch can be operated when the person can stand on the ground, so as to avoid the risk of pole climbing operation by the personnel on duty, save the operation time, and eliminate the high-altitude falling accidents caused by pole climbing during such operations;
3. The utility model solves the difficulty of installing the grounding wire when the overhead insulated conductor is not provided with a grounding loop;
4. The installation of the grounding electrode is completed during the installation of the grounding switch, which saves the trouble of setting a temporary grounding electrode during conventional temporary grounding, and ensures that the grounding electrode is well grounded and the grounding resistance meets the requirements;
5. The short circuit pipe of the grounding device is usually stored and managed in the power supply station, which can ensure that it is in good condition and avoid corrosion and poor contact caused by long-term wind and sun exposure.

Application Standard
 

Standard Number	Standard Name
GB/T 12599-2002	Metallic coatings -- Electroplated coatings of tin -- Technical specifications and test methods
GB/T 5270-2005	Metallic coatings on metallic substrates Test method for adhesion of electrodeposited and chemically deposited coatings
GB/T 6462-2005	Metallic and oxide coatings -- Measurement of thickness -- Microscopic method
QB/T 3817-1999	Test method for the thickness of the metal coating and chemical treatment layer of light industrial products Metallographic microscope
GB/T 10125-2012	Corrosion test in the artificial atmosphere - salt spray test
GB/T 1408.1-2006	Test method for electrical strength of insulating materials
DL/T 764.1-2001	Special fasteners for electric power fittings
GB/T 1985	AC high-voltage disconnector and grounding switch
GB/T 2706	Test method for dynamic and thermal stability of AC high-voltage electrical apparatus
GB/T 3309	Mechanical test of high-voltage switchgear at room temperature
GB/T 4109	High voltage casing technology
GB/T 5588	Pollution level of external insulation of high-voltage power equipment
GB/T 13540	Seismic requirements for high-voltage switchgear and control equipment
GB/T 16927.1	High voltage test technology

Application Environment
 

Table 3 Operating Environment Conditions

Serial no	Name		Unit	Required Value	Remarks
1	Ambient air temperature	Maximum temperature	ºC	+45
		Minimum temperature	ºC	-40
		Average temperature of the hottest month	ºC	30
		Maximum annual average temperature	ºC	20
		Maximum daily temperature difference	K	25
2	Altitude		m	≤3000
3	Solar radiation intensity (outdoor)		w/cm^2	0.1
4	Pollution level			e
5	Ice thickness		mm	20
6	Wind speed/pressure (outdoor)		m/s / Pa	34/700
7	Humidity	Average daily relative humidity	%	≤95
		Monthly average relative humidity		≤90
8	Earthquake resistance	Horizontal acceleration	m/s^2	2
		Vertical acceleration	m/s^2	1
9	safety factor	Sinusoidal resonance three cycle wave, with safety factor above 1.67.

Main technical parameters

3.1 See Table 1 for the main technology of the fuse

Serial No	Name	Unit	Standard Technical Value
1	Rated Voltage	kV	12
2	Operating Method	/	Phase separation manual, pull and push the shackle with an insulating operating rod for opening and closing operation. After closing, the conductive plate has a self-locking function, and when opening, pulls the shackle to automatically unlock.
3	Base	Texture of material	Hot galvanized bending plate with thickness not less than 4mm
		Minimum tensile and torsional strength	400MPa
4	Lightning impulse withstand voltage	kV	Phase to ground 75, fracture 85
5	1min power frequency withstand voltage	kV	48 Phase to ground 42, fracture 48
6	Rated Frequency	Hz	50
7	Rated Current	A	400
8	Rated short-time withstand current and duration	kA/ S	12.5/3
9	Rated peak withstand current	kA	25
10	Creepage distance of external insulation	mm	≥372kaD Note: when the average diameter Da < 300mm, ka=1.0; When the average diameter Da ≥ 300mm, Ka=0.0005 Da+0.85

Structure and Application Method

The device is divided into two parts. The first part is a pre-installed system, which is composed of terminal blocks, insulators, bases, and other parts, and is pre-installed on the line; the second part is the grounding conductive system, which is composed of blades, contacts, and other parts. It does not need to be installed at ordinary times. When grounding is required, the components can be hung in the pre-installed system by using a link rod.

Usage method:
The operation mode of grounding and grounding release of the device is as follows: when it is necessary to hook the grounding knife switch, the maintenance personnel only need to use the hanging ring to connect the movable shaft of the grounding knife switch to the U-shaped groove of the rear contact bending plate, and then push the locking part of the interlocking component on the grounding knife switch, so that the hook and the barb form locking coordination. At this time, the front contact - grounding knife switch - rear contact - base channel steel forms a grounding circuit, completing the grounding operation of the disconnector; When it is not necessary to hook the grounding knife switch, the maintenance personnel only need to pull the unlocking part of the interlocking component on the grounding knife switch to make the hook and the barb lose the locking coordination, and then use the hanging ring to remove the grounding knife switch from the U-shaped groove of the rear contact bending plate.

Packaging, transportation and storage

4.1 After all parts are properly packed or boxed, corresponding protective measures shall be taken during transportation to ensure that all parts will not be damaged, lost, stolen, deformed, damped, or corroded transportation.
4.2 The order number and delivery number of the Tenderee shall be marked outside the packing box.
4.3 The packing box shall be provided with obvious packaging, storage, and transportation pictorial marks.
4.4 The whole product or parts transported separately shall meet the requirements of transportation and loading.
4.5 The technical data provided with the product shall be complete.

Figure 1 Overall Installation Dimensions

Note: The performance of this product is constantly improving, and is subject to change without notice

Fig. 2 Installation Diagram

 

Quality Assurance

1. The warranty period of this product is 12 months. If otherwise specified in the contract, the contract shall prevail.
2. Please keep the product invoice. During the warranty period, the company has the right to ask the customer to show the invoice and date of purchase. At the same time, the trademark on the product should be clearly visible; otherwise, the company has the right not to guarantee the quality.
3. The Company will rush to the site to repair or replace the defective products within 24 hours after receiving the formal written notice during the warranty period for free, and the replaced nonconforming products shall be returned to the Company.
4. The customer shall reserve reasonable time for the company to repair the faulty equipment
5. The Company has the right not to guarantee the quality under the following circumstances:
   1. Losses caused by incorrect installation;
   2. Damage caused by incorrect modification;
   3. Damage caused by incorrect use;
   4. Damage caused by operation in an extremely harsh environment beyond the requirements of the product manual of the company;
   5. Any damage caused by exceeding the installation and use scope specified in relevant international standards;
   6. Damage caused by the abnormal natural environment.