Synthetic Testing Techniques

The complication of additional equipment and controls required for synthetic testing necessitates special care in circuit arrangement, switching device design, and instrumentation. Detailed methods developed by the authors for ensuring accuracy and security of control and consistency of operation are described. These methods include the use of a special trigatron, phase shifting of the trigatron gap current, a high accuracy current transformer, D-C voltage control, magnetic current zero anticipation, light pipe coupling, integrating filters, and inductive compensation of measuring shunts and voltage dividers.