Westinghouse ammeter Type PY5

Serial No.1977611

Westinghouse ammeter Type PY5 Moving iron instrument for alternating current [25-135Hz]. The unit has an integral multi tap current transformer connected to front panel terminals for 5/20/50/100/200 Amps full scale deflection. Claimed accuracy is half of one percent. Westinghouse Electric & manufacturing Company, Newark New Jersey USA, date April 1944.

This is one of many instruments collected by Jack Davidson C Eng FIEE which I have been given by Dr Graham Winbolt

Close up view of scale

Interior of the instrument

Instrument with cover in place