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China GGD AC Low Voltage Switchgear - Reliable Suppliers & Factory for Power Distribution Solutions
General
The GGD type low voltage distribution switchgear complies with standards such as IEC 61439-2 “Low-voltage switchgear and controlgear assemblies - Part 2: Power switchgear and controlgear” and GB/T 7251.12 “Low-voltage switchgear and controlgear assemblies - Part 2: Assemblies for power switchgear and controlgear”. The product features a simple and robust structure, high reliability, complete electrical schemes, strong versatility, and moderate pricing. It can be widely applied in various power-consuming venues.
Type designation
Type Designation Map
Service conditions
a
Ambient temperature: max: +40℃, min: -5℃, daily average temperature not more than 35℃.
b
Indoor installation, altitude is not more than 2000m.
c
Relative humidity is not more than 50% when the max temperature is +40℃. Higher relative humidity is allowed when in lower temperature, such as 90% humidity when the temperature is +20℃, but the effect of condensation should be considered due to the change of temperature.
d
Gradient of slope is not more than 5 degree when installing.
e
The equipment should be installed in places where there is no severe vibration and shock. No explosion risks medium, the medium with no corrosion gas and conductive dust.
Electrical parameters
Rated parameters are shown in Table 1
| Type | Rated voltage (V) | Rated current (A) | Rated short circuit breaking current (kA) | 1s rated withstand current (kA) | 1s rated peak withstand current (kA) |
|---|---|---|---|---|---|
| GGD1 | 400、380 | 630~100 | 15 | 15 | 30 |
| GGD2 | 380 | 630~1500 | 30 | 30 | 63 |
| GGD3 | 380 | 3150、2500~1000 | 50 | 50 | 105 |
Shell structure
- Framed is assembled by C type profile steel. Its rigidity and carrying capacity will be meet the installation requirements of electrical components, there are mounting holes of modulus E = 20mm and E = 100mm on the frame, in order to improve the versatility of product assembly.
- Main busbar are arranged in the rear and top of the switchgear, use DMC bus clamp, high mechanical strength and dielectric strength, can bear the effective value of 50kA and peak 105kA dynamic, thermal stability impact.
- The dimensions of the frame are shown in figure 1 and table 6.
| Type | Height (H) | Width (W) | Depth (D) |
|---|---|---|---|
| GGD1、GGD2 | 2200 | 600、800、1000 | 600、800 |
| GGD3 | 2200 | 800、1000、1200 | 600、800 |
Table 6
- For Switchgear width of 1000mm and 1200mm, in front, adopt double-doors structure of asymmetrical (800 +200) & (800 +400); for width of 600mm and 800mm, adopt whole door structure. At the back of switchgear, adopt symmetrical double-doors structure. This design will solve the direct electric shock protection and improve the overall appearance and strength, but also convenient for factories to form standardized production.
- Use galvanized shaft hinge to connect the switchgear door with the frame, which convenient to installation and disassemble. Add the rubber strip at the folding place of the door, the rubber strip has compression stroke when close the door, to prevent the door crashing the cabinet directly and guarantee the protection of the door class.
- Use multi-strand soft copper wire to link the instrument door to the framework, the door is equipped with many electrical components. Use earthing knurled screw to connect installation parts with framework, form a complete grounding protection circuit.
- Front and rear, topper and side of switchgear, the protection class should be reached to IP30, and also can be chosen by customer from IP20 to IP40.
- In order to strengthen the ventilation and heat dispersion, there are ventilation and heat dispersion holes at the lower, upper rear and topper of switchgear, so it will be form nature ventilation during operation, with better heat dissipation performance. The heat dispersion holes are sealed with steel wire mesh to ensure the protection of the switchgear.
- The cover of the switchgear can be removed, convenient to install and assemble the main busbar. The four corners at the top of the switchgear are equipped with rings for easy lifting and shipping.
- Use poly orange-peel baking paint to spray the switchgear main body, eliminate glare and enhance the adhesion. The installation parts are galvanized and passivating treatment, improve the “three proofing” performance.
Diagram
Figure 1 Outline diagram
Figure 2 Installation diagram
Frequently Asked Questions (FAQ)
What standards does the GGD low voltage distribution switchgear comply with?
The GGD switchgear complies with international standards including IEC 61439-2 ("Low-voltage switchgear and controlgear assemblies - Part 2") and national standards like GB/T 7251.12.
What are the environmental and service conditions required for installation?
It is designed for indoor installation at altitudes up to 2000m. The ambient temperature should remain between -5℃ and +40℃ (with a daily average not exceeding 35℃). The relative humidity should not exceed 50% at +40℃, and the installation slope gradient must be under 5 degrees in environments free of severe vibration, shock, or explosive risks.
What are the differences between GGD1, GGD2, and GGD3 models?
The primary differences lie in their rated current and short-circuit capacities. GGD1 supports rated currents from 630A to 100A with a 15kA breaking capacity. GGD2 supports 630A to 1500A with a 30kA breaking capacity. GGD3 is designed for heavier loads, supporting 1000A to 3150A with a 50kA breaking capacity.
What protection classes are available for the GGD switchgear?
The standard protection class for the front, rear, top, and sides of the switchgear is IP30. However, customers can request customized configurations ranging from IP20 up to IP40 depending on their specific site requirements.
How does the cabinet design facilitate heat dissipation and safety?
To enhance ventilation, heat dispersion holes are integrated at the lower, upper rear, and top sections of the switchgear, allowing natural air circulation during operation. These ventilation holes are sealed with steel wire mesh to prevent debris entry and maintain safety protection levels.
How is the GGD switchgear framework constructed?
The frame is assembled using robust C-type profile steel with modular mounting holes (E=20mm and E=100mm) to maximize component installation versatility. The exterior features a poly orange-peel baking paint finish to eliminate glare and improve adhesion, while the internal installation parts are galvanized and passivated for enhanced durability.