HV Insulator tester

Whether made of porcelain, glass, or composite (silicone), the quality of an insulator is a key factor in the robustness of an electrical installation. Failures due to defective insulators are costly. Live-line work requires insulators to be in good condition to ensure the safety of linemen and high-voltage workers. A critical failure can lead to long-term damage as well as material and financial losses. Pollution, salt fog, dust, wear, impacts, or micro-defects can dramatically degrade the quality of an insulator.

Unlike detections using infrasound or hotspot measurement, this method is not dependent on the shooting angle. Moreover, measuring the electric field makes it possible to detect fault trends or floating faults that traditional methods do not identify. POSITRON testers are the only devices capable of detecting faults in composite insulators.

TECHNIKELEC^® markets the POSITRON^® high voltage insulator testers. Based on a unique electric field measurement technology, these testers are currently the only known devices capable of real-time diagnostics of the integrity and aging state of your composite and silicone electrical insulators, in addition to traditional glass and porcelain insulators. They measure the alternating electric field surrounding porcelain and composite insulators. The field is proportional to the voltage across the insulator and drops at the location of a conductive fault. The electric field is read and stored for each disc and insulator string.

POSITRON insulator testers are available in 3 models :

• PID-PORCELAINE: tester for high-voltage line insulators made of glass and porcelain,
• PID-COMPOSITE: tester for high-voltage line insulators made of composite or silicon,
• PID-UNIV-Substation: versatile multiform insulator tester for substations and HV substations, in glass, porcelain and silicone.

Thus, before any work is carried out on a substation in the vicinity of live insulators, you have a preliminary diagnostic tool enabling you to identify insulators with faults and at risk of failure.