Technical Parameter
JX Grounding Box, JBX Grounding Protection Box and JHX Cross-connection Box
| Test Item |
Parameters |
| Direct-current withstand voltage test |
20kV, 1min, No Flashover, No Breakdown |
| Impulse voltage test |
40kV, Positive and negative polarity 10 times each, No flashover, No breakdown |
| Executive standard |
DI508 DL509 Gb11032 |
| Insulation resistance between the connection bar and shell |
≥20MΩ |
| Contact resistance of the connection bar |
≤20μΩ |
| Applicable grounding or coaxial cable section |
25mm²~300mm² |
BHQseries cable protector technical parameters
| Model |
Applicable cable system voltage (kV) |
Effective value of rated voltage (kV) |
Effective value of continuous operating voltage (kV) |
Nominal discharge current (kA) |
DC reference voltage U1mA (kV) |
| BHQ-7/400 |
35,66,110 |
2.8 |
2.24 |
10 |
>4.0 |
| BHQ-7/600 |
110,220 |
2.8 |
2.24 |
10 |
>4.0 |
| BHQ-7/400 |
110,220 |
4.0 |
3.2 |
10 |
>5.8 |
| Model |
Leakage current at 0.75U1mA (μA) |
Residual voltage of nominal discharge current (peak) (kV) |
2ms Square wave current (peak) (A) |
Partial discharge power at 1.05Uc (pC) |
4/10μs high current tolerance (kA) |
| BHQ-7/400 |
≤25 |
≤7 |
400 |
≤10 |
100 |
| BHQ-7/600 |
≤25 |
≤7 |
600 |
≤10 |
100 |
| BHQ-7/400 |
≤25 |
≤10 |
400 |
≤10 |
100 |
Product Introduction
JX Grounding Box and JBX Grounding Protection Box are suitable for direct grounding or protection grounding of metal protective layer of single core cross-linked cable of high voltage (35kV, 66kV, 110kV, 220kV). The JX Ground Box is used for the direct grounding of the metal cover of the three-phase single-core cable. The JBX Ground Box is used for the protection grounding of the metal cover of the three-phase single-core cable.
JHX Cross Connection Box is suitable for high voltage (35kV, 66kV, 110kV, 220kV) grade of single core cross-linked cable metal protective layer of cross connection protection grounding, It can limit the increase of over-voltage on both sides of metal sheath and insulating joint, It can control the induced voltage of the metal sheath, reduce or eliminate the ring current in the sheath, and improve the transmission capacity of the cable, prevent the cable sheath from being broken down, ensure the safe and reliable operation of the cable.
Product Features
The box body is made of stainless steel, with high mechanical strength and good sealing and waterproof performance;
T2 copper busbar is used for the internal terminal board, with small contact resistance and excellent conductivity;
The protective layer protector has reliable performance, which can prevent the over-voltage of the cable protective layer and ensure the normal work of the cable. The protector adopts two sealing and one forming, with good sealing performance;
The Ground Protection Box and the Cross-interconnection Box can be equipped with a counter, leakage discharge detector,
automatically record the discharge times under the action of over-voltage, monitoring the leakage current of the protector;
Compact structure, easy installation; Can be mounted on the wall, can also be directly buried installation, according to user requirements, design and processing of vertical (cabinet) box, installed on the ground;
Products in the factory according to the standard 100% factory inspection.
Company Profile
Audited Supplier 
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