Chapter 12 - Cable Testing and Maintenance
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 arrangem
Operating Principles (Radar)- 6 minutes
Defines duct-lay cable and describes the strategy commonly used to locate phase-to-ground faults in circuits that use duct-lay cable. Defines pipe-type cable and describes the strategy commonly used to locate phase-to-ground faults in circuits that use pipe-type cable.
Wave Pattern Identification (Radar)- 13 minutes
Identifies and explains the purpose of the controls on a typical test set for tracer current equipment. Explains how each of the following pickups and detectors is used to locate a fault in duct-lay cable: pickup coil and galvanometer, and picks and galvanometer.
Controls and Instrumentation(Radar)- 7 minutes
Explains how to perform the following preliminary steps before testing a circuit that uses duct-lay cable: interpret the system diagram, ensure that the circuit is isolated and grounded so that work can be done on it, and connect the cables on the test set so the set can be used to test for the existence of a fault.
Testing a Section of Cable (Radar)- 15 minutes
Shows how to locate a phase-to-ground fault with tracer current equipment in a circuit that uses duct-lay cable.
