Several different tests may be performed on power-factor correction capacitors
to determine their suitability for service. From these, users may select
tests that they deem practical and necessary. Factors that infl uence the
selection of tests may be the type of banks, such as substation banks or distribution
lines, electrical arrangements, failure rate experiences, and others.
NEMA Standards Publication CP1-1977, Section 6.06, “Field Test on Capacitor
Units,” listed the two options: (1) checking new capacitor units before placing
in service and (2) after they have been placed in service. For historical
perspective, the requirements for checking the capacitor units before placing
them in service were the following