Direct Earthing Link Box & SVL Earthing Link Box
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Model/Features
- Direct earthing link box: WJD
- SVL earthing link box: WHJD
- This type of link boxes is suitable for the direct grounding or ground protection of the metal sheath of high voltage power cables. It uses stainless steel as the protective shell, and can also be filled with resin inside. It is small in size, light in weight, and easy and quick to install.
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Electric Performance
| Test Item | Technical Requirements |
| DC voltage withstand test | Neither breakdown nor flashover shall occur at 20kV for 1 min |
| Impulse voltage test | Neither breakdown nor flashover shall occur at 10 positive and 10 negative impulse of 40kV (peak value) |
| Insulation resistance test between copper bar and housing | Not less than 20MΩ |
| Contact resistance test of copper bar | Nor more than 20μΩ |
Main Electrical Performance of SVL (sheath voltage limiter)
| Test item | BHQ-7/600 | BHQ-10/600 |
| DC 1mA reference voltage | 40kV | 5.8kV |
| Rectangular wave capacity | 600A | 600A |
| Residual voltage ratio | K≤2 | K≤2 |
| Current capacity | 100kA | 100kA |
| Rated voltage | 2.8kV | 4kV |
| Residual voltage of nominal discharge | ≤7kV | ≤10kV |
Ordering information: (For all HV cable accessories)
- Cable configuration and the cross-sectional area of earth wire shall be provided when ordering.
- Welcome to contact our sales manager for any special requirements before placing your order.
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