Aalto university
school of electrical engineering HELSINKI FINLAND
Abstract of the
master's thesis
Author: Esa Nummijoki
Title: Automatic Test System for Type Tests
of the Uninterruptible Power Supply
Date: 27.3.2012 Language: English
Number of pages:10+59
Department of Electrical Engineering
Professorship: Industrial Electronics Code: S-81
Supervisor: Prof. Seppo J. Ovaska
Instructor: M.Sc. (Tech.) Risto Karola
Testing is an essential part of product development. In UPS product development,
di erent tests are made every day. Testing requires large variety of measurement
instruments and other equipment such as large load systems and di erent kind of
test con gurations. Signi cant number of performed tests are based on the UPS
type tests de ned in the IEC-62040 standard.
Testing consumes a lot of time and that way also resources. To solve this problem,
an automatic test system for type tests is considered. The aim of this thesis was
to clarify the need for the automatic test system, and clarify requirements needed
to realize it.
The work was done by reviewing the type tests and di erent parts of an automatic
test system. In addition, an experimentation was made, resulting a prototype.
The prototype is able to automatically perform an indicative e ciency test for
the UPS. Furthermore, a possibility to automate the most complex type test, a
dynamic output performance test, was examined. This examination resulted a
description of the test process and LabVIEW programs, supporting the execution
of the test. However, the conclusion was that it is not sensible to automate
the test, due to the fact that it is not often performed and automating the test
requires a lot of time and resources.
The review and the experimentation proved that realization of an automatic test
system, able to perform all the type tests, requires large amount of time and
resources. Due to this, the automatic test system for type tests is not the best
solution to reduce the time and resources consumed by testing.
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