Energized Insulator Tester

Energized Insulator Tester

 

 

 

 

 

 

Operation
• Sensitive voltmeter measures difference in potential across each insulator in a suspect string
• Comparative readings from satisfactory strings in same operating situation quickly indicate the state of every
insulator in the string being tested
• Meter places minimal load on the phase as it requires only a small leakage current to make a reading
• Two straight steel probes threaded into the tester forks simply contact the metal fittings on both ends of each insulator at the same time
• Mounted on a 1-1⁄4″-dia. Epoxiglas® pole with a universal fitting
• Before each use the tester should be attached to the proper length hot stick for the system voltage involved
• Distribution model’s scale reads up to 11 kV
• Transmission model’s scale reads a maximum of 16 kV
Applications of Energized Insulator Tester
• Without interrupting service, one of these testers quickly can check the condition of each insulator in a string
• Greatly reduces maintenance costs
• Only insulators identified as damaged require replacements
• No need to change entire strings
• Available in two models
• Testers serve specific applications:
o Deadend insulators on distribution systems through 35 kV

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