New live line tester for porcelain suspension insulators on high-voltage power lines

Until now at Hydro-Quebec, overhead power transmission line porcelain insulators had been tested by the buzz method which simply consists in applying a short-circuit to each insulator in a string and listening for a buzz-like sound indicating a good insulator. However, safety considerations that pre...

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Bibliographic Details
Published in:IEEE transactions on power delivery 1994-01, Vol.9 (1), p.208-219
Main Authors: Vaillancourt, G.H., Bellerive, J.P., St-Jean, M., Jean, C.
Format: Article
Language:English
Subjects:
240303 - Power Transmission Lines & Cables- Overhead Lines- (1990-)
Assembly
AUTOMATION
Dielectrics and electrical insulation
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATORS
HAZARDS
HEALTH HAZARDS
INSPECTION
Insulator testing
Maintenance
MECHANICAL STRUCTURES
PERFORMANCE TESTING
Porcelain
POWER TRANSMISSION AND DISTRIBUTION
Power transmission lines
POWER TRANSMISSION TOWERS
SAFETY
Senior members
System testing
Tellurium
TESTING
Voltage
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Summary:Until now at Hydro-Quebec, overhead power transmission line porcelain insulators had been tested by the buzz method which simply consists in applying a short-circuit to each insulator in a string and listening for a buzz-like sound indicating a good insulator. However, safety considerations that preclude short-circuiting insulators and other disadvantages of that method have led Hydro-Quebec to undertake and complete the development of a new insulator tester. The working principle of this new device is based on the automatic measurement and recording of the electric field along the insulator string which decreases considerably in front of an internally-shorted insulator. The tester is slid along the string while the insulators are counted automatically. The information from tests on up to 200 strings can be stored in the device to be later transferred in a host computer for interpretation and/or permanent storage. The new tester also gives information on voltage distribution along the insulator strings which can be useful for the design of future power transmission lines.< >
ISSN:0885-8977
1937-4208
DOI:10.1109/61.277692