BES9032 RCD tester, also known as leakage switch detector, leakage protector tester, residual current action protector detector, residual current action protector tester, is a necessary testing instrument for engineering quality supervision stations and construction companies. Measure the operating time and operating current of the leakage switch. It is mainly used to test the leakage current, leakage non-operating current and leakage operating time of the leakage protector. It can be widely used in power supply department, agricultural power department, leakage protector manufacturer, labor security inspection department in construction, mining, machine tool and other industries, as well as electricians.