Earthing box
The cable sheath direct grounding box is suitable for the direct ground connection of the metal sheath of the three-phase single-circuit high-voltage cable.
The overall structure of the product is simple and reliable in sealing. The outer shell and the main internal structure are welded with stainless steel. The insulating parts are treated with moisture-proof. The grounding connection row is made of copper with excellent conductivity. According to the requirements, all assemblies are compressed by bolts, which is easy to install and facilitates the disconnection between the metal sheath of the cable and the ground wire during the preventive test.
The grounding box can be installed outdoors or in cable trenches, and is not affected by various abnormal climates.
The working principle of the protector: The core component of the product is the cable sheath protector, and the protector is composed of an oxidation resistance sheet with excellent nonlinearity. In the normal working state, the resistance piece has a high resistance value, and when the overvoltage wave is immersed, the resistance piece has a low resistance value. Even if a large current flows, the voltage value across the protector is still limited within the allowable range. It effectively protects the insulation of the outer sheath of the cable and prevents it from being damaged by overvoltage.
The cable sheath protection grounding box is suitable for high-voltage power cable systems, which can realize the crossover and interconnection between the metal sheaths of three-phase high-voltage cables, protect the outer sheath insulation of high-voltage cables from overvoltage damage, and effectively improve the power supply of power cable lines. reliability.
The overall structure of the product is simple and reliable in sealing. The outer shell and the main internal structure are welded with stainless steel. The insulating parts are treated with moisture-proof. The grounding connection row is made of copper with excellent conductivity. According to the requirements, all assemblies are compressed by bolts, which is easy to install and facilitates the disconnection between the metal sheath of the cable and the ground wire during the preventive test.
The grounding box can be installed outdoors or in cable trenches, and is not affected by various abnormal climates.
Scope of use:
The product is applied to the direct grounding of the metal sheath of the 35-220kV high-voltage cable system;
The conductor cross-section range of the grounding cable is 120-400mm².
Normal use conditions:
a. Ambient temperature -40 ºC -40 ºC;
b. The altitude does not exceed 1800 meters;
c. The power frequency is 50Hz.
d. Application 35-220kV high voltage grounding
| Normal use conditions: |
a. Ambient temperature -40 ºC~40 ºC; |
| b. The altitude does not exceed 1800 meters; |
| c. The power frequency is 50Hz. |
· VHJDX-35-110-220kV Protective Grounding Box
· VJDX-35/110/220KV Direct Grounding Box
· VJLX-35-110-220KV Cross Interconnect Grounding Box
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