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Power quality in a university campus the user’s perspective.

A. Moreno-Muñoz
1
, MD. Redel
1
, AL. Prieto
2
, A. Plaza, M. González
1
and J. Luna 1
Departamento de Electrotecnia y Electrónica. Área de Electrónica.
E.P.S. Universidad de Córdoba.
Avenida Menéndez Pidal sn. 14071 Córdoba. SPAIN. Tel +35-57-218373. fax +35-57-218316. email amoreno@uco.es
2
Unidad Técnica. Universidad de Córdoba. Campus de Rabanales
14071 Córdoba. SPAIN.
Abstract.
This paper presents preliminary results from a power quality audit conducted at a university’s campus over last year. Voltage and current were measured at various academic buildings it was found that the main problems for the equipment installed were voltage sags and surges. These phenomena are purely random in nature. The paper examines the causes and effects of power disturbances that affect computer or any other microprocessor based equipment and analyses the auto-protection capabilities of modern power supplies. The convenience of enhanced power supply or
“low-cost customer-side” protection solutions is also discussed. Finally it is addressed the role of the Standards on the protection of electronic equipment and the implications for the final costumer.
Key words.
Power quality survey, commercial and residential installation, servicing sensitive electronic equipment.


Table 1. disturbances on computer-related equipment.
Disturbance type
Figure 1. voltage 5
Figure 3. current 3
Figure 5. voltage and current of operating spectrometer.
Figure 7. neutral current.
Figure 8. anomalies detected at lv buildings entrance over
Figure 10. individual lv transient detected at equipment
Parameter recommended



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