ABSTRACT:
This work entails design, construction, packaging and evaluation of a prototype automatic a.c. voltage stabilizer using parallel cascaded relays. The unit was cascaded to provide more switching contacts on the auto-transformer. The overall system design is a compact assembly encased in a portable metal box with handle which can operate on 90v minimal input voltage. In this paper, a parallel cascaded relay what is essential was implemented in the design of voltage stabilizer damp power system oscillation so that electrical power supplied to appliances remains constant over a range of values. This new approach of parallel cascading the switching relays to provide considerable of voltage was implement and tested. The result obtained from testing with variable a.c. source shows that the voltage stabilizer which was implemented with parallel cascaded relays gives efficiency of 15% increase when compared with our conventional voltage stabilizers.