A 1000VA VOLTAGE STABILISER WITH DELAYED RESTART

Authors

  • J. T. AGEE Department of Electrical Engineering, University Of Botswana, P. Bag 0061 Gaborone, Botswana. Author
  • M. GARBA Electrical Engineering Programme, Abubakar Tafawa Balewa University, P M B 0248, Bauchi, Nigeria. Author

Abstract

A domestic voltage stabiliser with delayed re-start capability was designed, implemented and tested. The system was built around an autotransformer having six output tapings. Reliable tap changing for voltage stabilisation was effected using a digital logic controller, interfaced to mechanical relays. Specific features of the stabilser include the ability for the user to program the time that should elapse, after a voltage transient, before the stabiliser can restart; and the over-voltage and under-voltage protection circuits which operate at the extremities of 250V and 140V respectively. Experimentation with the voltage stabilizer showed that, for input voltages in the range 160V-250V, the output of the stabiliser varied within tolerances recommended by IEE regulations. Furthermore, restart of the stabiliser could be delayed for up to 15 minutes.

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Published

2006-03-31

Issue

Vol. 41 No. 1 (2006): NSE TECHNICAL TRANSACTION JOURNAL (NSE TT-J)

Section

Articles