Test stand for testing contacts of switches in a fixed household electrical installations

Description of a computerized test stand designated for switching testing of contacts in switches used in fixed household and similar installations. Testing device has a mechanical drive, adapted for testing of key-driven (actuator) switches, and an electronic measurement system adapted for simultaneous testing of 5 switches. The stand´s software enables to execute the statistical measurements of different electrical and mechanical quantities during testing of the switching ability. Current and voltage waveforms are recorded in the computer´s memory and after the test they may be analysed and described in detail. The measuring system enables to designate the number, duration and arc energy of the contacts´ bounces during switching on and arc duration and energy during switching the current off. Readings are then tabulated and may be presented in the graphical form.