End caps Thus, cross-bonding is impossible with cable circuits comprised of only a couple of lengths of cable. For these kinds of circuits, one-place bonding would need to be utilized Except if it had been possible to reconfigure the circuit into 3 sections. In addition, in exercise, there may be some circulating currents present because the lengths and cable spacings in each portion may not be exactly equivalent.
For cables mounted in non-symmetrical configurations, such as a flat formation, the induced voltages around the cable sheaths in Each and every part will not be specifically equivalent, but these imbalances are generally not considerable. The cable spacing could fluctuate additional noticeably together the route if different set up techniques are applied.
An individual-issue bonded cable program is mostly used in substations once the cable route is fairly short and the place it truly is uneconomical to utilize the cross-bonded process. Advantages
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A technique is cross-bonded Should the arrangements are this sort of which the circuit supplies electrically continual sheath runs from earthed termination to earthed termination but with the sheaths so sectionalized and cross-connected to be able to lessen the sheath circulating currents.
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There's no standard strategy prescribed by IEC or IEEE for selecting the optimum score for cable sheath/jacket security.
A protracted end cap is perfect whenever you need to have an finish cap with Improved capacity in stopping corrosion. These conclusion caps include additional from the pipe's conclude and gradual deterioration that could Commonly creep within the conclude of your pipe and inward.
Underground cable bonding programs utilising 132kV XLPE insulated HV power cables are designed to offer cable sheath bonding to eliminate or decrease the circulating sheath currents and limit standing induced cable sheath voltages for protection good reasons.
Commonly Link Box implies near association with insulated joints (interrupted sheathing style and design) of an extended ability line serving being a protecting housing safeguarding every one of the related bonding linkages and parts for lengthy responsible support everyday living. They are also mounted at each finishes of the circuit connected to terminations. At Every single point, electrically The interior style configuration and installed components are distinctive serving a definite bonding purpose.
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The heat produced by way of joule losses via the circulating present circulation will bring about supplemental heating which will de-price the cable technique and cause much larger cable dimensions for good bonding preparations. Structure Concerns Link Boxes with / Without Svl