What is the purpose of an insulation tester?

The purpose of an insulation tester is to check the integrity of insulation in electrical wiring. Insulation testers apply a high voltage to the insulation of electrical cables and components to measure how well the insulation is performing. This process helps to identify any weaknesses, damage, or deterioration that could lead to electrical leakage, shorts, or even potential hazards such as electrical shocks or fires. A well-functioning insulation system is crucial for the safe and reliable operation of electrical systems, making this testing an essential practice in electrical maintenance and safety protocols.

The other options involve different aspects of electrical testing and measurement but do not relate directly to the primary function of an insulation tester. Voltage measurement pertains to assessing the operating conditions of a circuit rather than the integrity of its insulation. Assessing load capacity focuses on the amount of current a line can carry safely, while determining the age of electrical components does not specifically involve measuring the condition or performance of insulation.