Insulator Tester

Test dielectric strength of porcelain insulators, using testing apparatus.

What does an Insulator Tester do?

Tests dielectric strength of porcelain insulators, using testing apparatus: Fastens one hooked end of insulator to metal rod of testing set and connects other hook to grounded wire. Turns dial on test set to specified voltage. Presses button to produce voltage and observes meters on test set to verify dielectric strength of insulator. Discards defective insulators.