GGD Ac low-voltage power distribution cabinet
Model meaning
Conditions of use
◆Altitude:≤2000m;
◆Ambient temperature:The upper limit of ambient air temperature is+40℃,and the lower limit is-5℃.The average temperature within 24 hours should not exceed+35℃
◆Relative humidity:it doesn't exceeds 50%at a maximum temperature of+40℃;higher relative humidity s allowable at lower temperatures(e.g.90%at +20℃);however,it should be considered that occasional condensation may occur due to temperature change.
◆Installation location:When installing the equipment,the inclination of the vertical plane should not exceed 5.The equipment should be installed in a place without severe vibration and impact and with medium not enough to corrode electrical component.
◆Note:When the above normal service conditions cannot meet the usage requirement,it shall be negotiated between the user and the manufacturer
Basic electrical parameter
|
Model |
Rated voltage(V) |
Rated current(A) |
Rated short-circuit switching current(kA) |
Rated short-time withstand current(1S)(kA) |
Rated peak withstand current(kA) |
||
|
A |
B |
C |
|||||
|
GGD1 |
380 |
1000 |
600(630) |
400 |
15 |
15 |
30 |
|
GGD2 |
380 |
1500(1600) |
1000 |
600 |
30 |
30 |
63 |
|
GGD3 |
380 |
3150 |
2500 |
2000 |
50 |
50 |
105 |
Main circuit solution
The main circuit solution is selected based on the opinions of various design and usage departments,and additional solutions are added to meet the needs of the power plant.The rated current has been increased to 3150A,making it suitable for distribution transformer of 2000kVA and below.
In addition,GGJ1 and GGJ2 capacitor compensation cabinets are designed to meet the needs of reactive power compensation,with 4 main circuit solutions and a total of 12 specifications.
Auxiliary circuit solution
The design of auxiliary circuit is divided into two parts:power supply solution and power plant solution.There is enough space in GGD cabinet to install secondary components.
Selection of electrical components
The GGD cabinet mainly adopts advanced electrical components that can be mass-produced domestically, such as ME, DW15, etc. Meanwhile, based on the principle of economy and rationality,some available old products such as Dz20 are retained while fully considering feasibility, Do not use obsolete products
The HD13BX and HS13BX rotary operated knife switches are specialized components designed to meet the unique structural requirement of GGD cabinet,it changes the operating mode of the mechanism while retaining the advantages of the product, making it a new practical type of electrical component.
When the design department selects new electrical components with better performance and more advanced technology according to user needs,the GGD cabinet has good installation flexibility and generally does not cause manufacturing and installation difficulties due to updating electrical components.
To further improve the dynamic stability of the main circuit, the ZMJ type combined busbar clamp and insulation support busbar clamp specially equipped for GGD cabinet are made of high-strength and high fame retardant PPO alloy material thermoplastic molding. With high insulation strength, good self-extinguishing performance and unique structure,it can be easily combined into single busbar clamp or double busbar clamp by adjusting the cordwood type interblock, and the sleeve type molded structure for insulation support.,The low cost and high strength solve the problem of insufficient creepage distance old products.
Structure introduction
The cabinet body of the GGD type AC low voltage distribution cabinet adopts the form of universal cabinet,and the framework is assembled with C-shaped profiles.The framework parts and specialized supporting parts are supplied by designated steel production plants to ensure the accuracy and quality of the cabinet body.The components of the universal cabinet are designed according to the modular principle and have 20 modular mounting holes.
The high universal coefficient enables the factory to achieve preproduction,shortening the production cycle and improving work efficiency.
The design of GGD cabinet fully considers the heat dissipation issue during cabinet operation.There are different numbers of heat dissipation slots on both ends of the cabinet,when the electrical components inside the cabinet heat up,the heat rises and is discharged through the upper slot,and cold air is continuously replenished into the cabinet through the lower slot,forming a natural air duct from bottom to top in the sealed cabinet and achieving the purpose of heat dissipation.
The GGD cabinet is designed according to the requirement of modern industrial product styling,it uses the golden ratio method to design the cabinet body shape and the division dimension of each part,making the whole cabinet beautiful and elegant,with a brand-new look.
The cabinet door is connected to the framework with a pivot hinge,which is easy to assemble and disassemble.A mountain shaped plastic strip is embedded at the folded edge of the door,when the door is closed,the strip between the door and the framework has a certain compression stroke,which can prevent direct collision between the door and the cabinet,and also improve the protection level of the door.
The instrument door equipped with electrical components is connected to the framework with multiple strands of soft copper wire,and the installation parts inside the cabinet are connected to the cabinet framework with knurled screws,forming a complete grounding protection circuit for the entire cabinet.
The surface of the cabinet is sprayed with plastic,which has strong adhesion and good texture.The entire cabinet is in a matte color tone,avoiding glare effects and creating a comfortable visual environment for the personnel on duty.
The top cover of the cabinet body can be removed when needed to facilitate the assembly and adjustment of the main busbar on site.The four corners of the cabinet top are equipped with lifting rings for lifting and shipping.
The protection level of the cabinet is P30,and users can also choose between IP20-1P40 according to the requirement of the usage environment.
Installation dimension
