The purpose of this guide is to help users of SVCs carry out a field test program prior to placing an SVC into service. The major elements of a commissioning program are identified so that users can formulate a specific plan that is suited to their own SVC. Such a test program should cover the following: a) Equipment tests within the SVC system b) Tests of the various subsystems that comprise the SVC system c) Commissioning tests for the complete SVC system d) Acceptance testing of the complete SVC system It should be recognized that there are many ways in which a particular SVC may be commissioned, and also that it is not the purpose of this guide to endorse a specific procedure to the exclusion of otherre methods. Depending on the purpose of the SVC design (transmission type or smaller size used for other purposes) some tests may not be required. In particular, some control system tests may be included in the factory tests. Also, acceptance tests may be integrated into any of the categories listed above.