ReturnTo Theme-Group-Choice | Onelevelup |
2G033 | Locating faults | |
G01R31/08 -31/11 |
G01R31/08-31/11 | AA | AA00 WHAT IS HANDLED |
AA01 | AA02 | AA03 | AA04 | AA05 | AA07 | AA08 | AA09 | ||
. Electric lines | . . Three-phase AC | . . . Cross bonds | . . Electric lines for electric trains having autotransformers | . . DC transmission cables | . Communication cables | . . Communication cables having interrupters | . . Optical communication cables | |||||
AB | AB00 TYPE OF INFORMATION |
AB01 | AB02 | AB03 | AB04 | AB05 | AB07 | |||||
. Fault position | . Faulty sector | . Direction of fault | . Faulty system | . Faulty phase | . Faulty equipment | |||||||
AC | AC00 TYPE OF FAULT |
AC01 | AC02 | AC03 | AC04 | AC05 | AC06 | AC08 | AC09 | |||
. Faulty connections | . Grounding | . . Leakage by underground cables | . Short-circuits | . Discharge | . Excessive current or lightning strikes to steel towers or wires | . Faulty insulation | . Contact, crosstalk | |||||
AD | AD00 METHODS OF LOCATING |
AD01 | AD02 | AD03 | AD04 | AD05 | AD07 | AD08 | AD09 | AD10 | ||
. Surge detection | . . Type A (i.e., detecting surges at one end) | . . Type B, type E (i.e., generating pulses at the other end) | . . Type D (i.e., synchronized counting at both ends) | . . Type P (i.e., constant generation of reference pulses) | . Pulse reflection | . . Generation of continuous pulses | . . Variants that start automatically using surges and the like | . . Variants that correlate sent and received signals | ||||
AD11 | AD12 | AD13 | AD14 | AD15 | AD16 | AD18 | AD19 | AD20 | ||||
. Measuring impedance, (e.g., capacitance, inductance) | . . Measuring using bridges | . . Using phase differences between voltage and current | . . (Digital formulas) produced using sampling data | . . Using information at both ends | . . Using information before and after faults | . Arranging multiple detectors along a line | . Locating while in motion | . Impressing signals for detection | ||||
AD21 | AD22 | AD23 | AD24 | AD25 | AD27 | AD28 | AD30 | |||||
. Detecting either voltage or current | . Variants using characteristics of entire systems | . Using cable characteristics, (e.g., stationary waves) | . Variants using detecting cables | . Variants using undamaged lines | . Increasing faults to make detection easier | . Generating surges at fault points by impressing high voltage | . Detection using pressure changes, acoustics, or heat generation | |||||
AE | AE00 LOCATING SIGNALS, IMPRESSED SIGNALS |
AE01 | AE02 | AE03 | AE04 | AE05 | AE06 | AE07 | AE09 | |||
. Surges | . Pulses | . Noise | . Arcing, discharges | . High frequency signals | . AC electromagnetic fields (i.e., commercial frequencies) | . Potential distribution, current distributions) | . DC high voltage | |||||
AF | AF00 MEASURED QUANTITIES |
AF01 | AF02 | AF03 | AF04 | AF05 | ||||||
. Peak values | . Time | . Phase | . Frequency | . Zero-phase current | ||||||||
AG | AG00 PURPOSE, OTHERS |
AG01 | AG02 | AG04 | AG05 | AG06 | AG08 | AG09 | AG10 | |||
. Controlling detection levels | . Variants using switching surges | . Correcting for time delays | . Eliminating unwanted reflection, masking | . Correcting distortions | . Eliminating the effects of charging current, ground current | . Eliminating unwanted signals, noise | . Probe construction | |||||
AG11 | AG12 | AG13 | AG14 | AG15 | ||||||||
. Having multiple counters, locating apparatuses | . Locating in live lines | . Using optical cables | . Signal processing | . Variants characterized by mechanical construction |