Transformer test control device

Abstract

This transformer test control device permits testing of an electrical transformer as installed on a power pole without connecting any high voltage of the power distribution line to the transformer, thereby significantly enhancing the safety of the lineman during the testing procedure. A test control device for controlling the testing of an electrical transformer combines a visual indicator acting as both a power-on indicator and a fuse tester, a voltmeter, a voltage adjustment control, an operator control switch and a fuse as well as terminals for connecting both to an alternating current electrical supply and to the terminals of the primary coil of a transformer to be tested. Additionally, the test control device includes terminals for connecting the device and a secondary circuit to selected output terminals of the secondary coil of the transformer and additional terminals for receiving and retaining the contact portions of voltmeter test probes. The test control device simplifies the transformer testing and aids the lineman in testing while maintaining high standards for safety practices and, especially, during adverse weather conditions. This device may be embodied to include a dedicated second voltmeter. The test control device may be powered by either normal 120 volt line voltage or the output of a power inverter connected to the electrical system of a truck or other motor vehicle in those areas without readily available 120 volt AC power.

Dependencies are inferred from the claim text.