INVESTIGATING FLUID TIGHTNESS OF SUBMERSIBLE PUMPS

摘要

1349131 Pumps A BLUM 16 Feb 1973 [18 Feb 1972] 7654/73 Heading F1A [Also in Division G1] The invention relates to an electric submersible motor-pump having the motor and pump in two compartments separated by an oil chamber with an electrode mounted therein as described in German Specification 1265855. The leakage indicating glow lamps of the prior Specification are replaced by a low voltage semi-conductor switching circuit, wherein the probe electrode is connected in base bias circuit of transistor controlling a thyristor to switch on a leakage indicator lamp.