JHJD Type Cross Interconnection Grounding BoxDetailed product description：

JHJD type cross interconnection grounding box is used in 66kV, 110kV or 220kV power systems to protect the insulation layer of high-voltage cables from overvoltage damage. The main protector inside the product adopts ZnO cable insulation protector, and the sealing structure adopts silicone rubber sealing, achieving high sealing and waterproof requirements. All are made of cast aluminum or stainless steel shells, and the conductor connectors are made of tin plated copper bars and bolted together. The installation is simple and easy to separate the cable metal sheath from the protector during preventive testing. The protective grounding box can be installed for outdoor operation and is not affected by various abnormal weather conditions.

Reference Standard
GB 50217-94 "Code for Design of Cables in Electric Power Engineering"

JHJD type cross interconnection grounding box model
ZJJD type, direct grounding box, used for direct grounding of cable sheath.
BHJD type, protective grounding box, used for protective grounding of cable sheath.
JHJD type, cross interconnection grounding box, used for cross interconnection protection grounding of the metal protective layer in the middle of the cable.

Product Features
Maintenance free, lightweight, and easy to install
The protective box can be equipped with a design counter

Usage conditions for JHJD type cross interconnection grounding box

Indoor or outdoor ambient temperature: -50 ℃ to+50 ℃
Main performance indicators
5-second power frequency withstand voltage: 3kV
UDC 1mA：4.5kV
8/20us, 10kA impulse current residual voltage: ≤ 9.5 kV (peak)
2ms square wave, 18 times: 400 A (peak)
4/10us impulse current: 65 kA (peak)
Applicable cross-section of grounding cable: ≤ 240mm2
operation and maintenance
Maintenance free
Ordering Instructions
Please provide the cross-sectional dimensions of the grounding cable