Summary
This 49-minute DVD explains the basic principles of using capacitive discharge equipment and voltage gradient equipment to locate faults in direct-buried cable. It demonstrates the use of capacitive discharge equipment to locate a fault in primary cable, and the use of voltage gradient equipment to locate a fault in secondary cable. It shows some of the considerations involved in locating faults.
Training Sessions
Introduction to Cable Fault Location - 6 minutes
Explains what a ground fault is. Lists the essential components contained in fault-locating equipment for URD cable.
Capacitor Discharge Test Unit - 8 minutes
Identifies and explains the purpose of the controls on a typical capacitor discharge test unit. Explains how each of the following tests provides information that is used to determine the location of a fault in URD cable: high potential (hipot) test and capacitor (cap) discharge test.
Locating a Fault in Primary URD Cable, Part 1 - 9 minutes
Explains how to perform the following preliminary steps before testing a primary URD cable: interpret the system diagram, ensure that the cable is dead so that it can be worked on, and connect the cables on a capacitor discharge test unit so that the unit can be used to test a section of cable in which a fault is suspected.
Locating a Fault in Primary URD Cable, Part 2 - 8 minutes
Describes how one type of pickup and detector arrangement can be used with a capacitor discharge test unit. Pinpoints the location of a fault with the capacitor discharge test unit and the pickup and detector arrangement.
Voltage Gradient Equipment - 8 minutes
Explains how voltage gradient equipment can be used to locate a fault in a section of secondary URD cable. Identifies and explains the purpose of the controls on a typical voltage gradient transmitter, pickup, and detector.
Locating a Fault in Secondary URD Cable - 10 minutes
Describes how to perform the following preliminary steps before testing a primary URD cable: interpret the system diagram, ensure that the cable is dead so that it can be worked on, and connect the test leads on a voltage gradient transmitter so that a section of secondary URD cable can be tested. Pinpoints the location of a fault using the voltage gradient pickup and detector arrangement.
