FAA L830 Transformer Qualification

4.2 Tests. The following tests shall be conducted on three random samples
to prove compliance with this specification. Unless otherwise specified,
all tests shall be made at room temperature (approximately 25° C. ± 5° C.),
using a suitable sine wave power source with primary current maintained at the
specified values by means of an auto-transformer. If it is necessary for water
bath temperature to be substantially different from limits set above, the
proper temperature coefficient for the compound being used may be applied
when computing insulation resistance values. It will be the manufacturer’s
responsibility to furnish proof that the coefficient used is correct.

Proof shall be in the form of a certified test report furnished by the
manufacturer . Joints between transformer leads, and between transformer
leads and test leads, will not be taped during any of the dielectric or
insulation resistance tests required by paragraphs 4.2.3 and 4.3.2 herein.
All test lead connectors shall be checked with a "go," "no go" prior to use
to assure proper watertight seal.