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IEEE 1234
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IEEE 1234 2007 Edition, May 17, 2007 Guide for Fault-Locating Techniques on Shielded Power Cable Systems
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Description / Abstract:
The introduction of cables with extruded dielectric insulation
and of modern splicing technology has imposed new conditions and
restrictions on cable fault locating. The use of excessive high
voltages and energies during ac, dc, and surge testing of
service-aged power cable systems with extruded dielectric
insulation may overstress insulation, creating defects that become
faults after the cables are returned to service.
This guide is intended to be applied to medium-voltage distribution cables. Medium-voltage distribution systems generally operate at system voltages above 1 kV and up to 34.5 kV nominal.
The end user of the cable circuit should evaluate the necessity for verifying the integrity of extruded dielectric insulated cables, and, if they are in critical service, proceed to perform the high-voltage/energies testing. If not detected during dielectric tests, defects in dielectric materials may result in cable failures during the transient voltage surge episodes while in service.
Purpose
This guide is intended to provide trouble-shooting and testing personnel with information to quickly identify a faulted cable section and/or locate a cable fault with minimum risk of further damaging serviceable cables, terminations, and equipment.
This guide is intended to be applied to medium-voltage distribution cables. Medium-voltage distribution systems generally operate at system voltages above 1 kV and up to 34.5 kV nominal.
The end user of the cable circuit should evaluate the necessity for verifying the integrity of extruded dielectric insulated cables, and, if they are in critical service, proceed to perform the high-voltage/energies testing. If not detected during dielectric tests, defects in dielectric materials may result in cable failures during the transient voltage surge episodes while in service.
Purpose
This guide is intended to provide trouble-shooting and testing personnel with information to quickly identify a faulted cable section and/or locate a cable fault with minimum risk of further damaging serviceable cables, terminations, and equipment.