JPH0345064U

JPH0345064U -

Info

Publication number: JPH0345064U
Application number: JP10512689U
Authority: JP
Priority date: 1989-09-06
Filing date: 1989-09-06
Publication date: 1991-04-25

Description

[Brief explanation of drawings]

第１図及び第２図はこの考案の一実施例を示す
図で、第１図は回転電機コイルの防湿装置を示す
接続図、第２図は回転電機のコイルを示す側面図
、第３図は従来の回転電機のコイルを示す側面図
である。１……ステータコイル、７，８……検出素子（
電極）、１１……交流電源、１３……回転電機、
１６……比較器、１７……設定器、１８……警報
器、１９……リレー、１９ａ……常開接点、２０
……切替スイツチ、２１……変圧器。なお、図中
、同一符号は同一または相当部分を示す。 Figures 1 and 2 are diagrams showing one embodiment of this invention, in which Figure 1 is a connection diagram showing a moisture proof device for a rotating electric machine coil, Figure 2 is a side view showing a coil of a rotating electric machine, and Figure 3 is a diagram showing an embodiment of this invention. 1 is a side view showing a coil of a conventional rotating electric machine. 1... Stator coil, 7, 8... Detection element (
electrode), 11...AC power supply, 13...rotating electric machine,
16... Comparator, 17... Setting device, 18... Alarm, 19... Relay, 19a... Normally open contact, 20
...changeover switch, 21...transformer. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A detection element that detects a decrease in insulation resistance value on the surface of a coil end of the rotating electrical machine, a changeover switch that is connected between a power source and the rotating electrical machine to operate or stop the rotating electrical machine, and a switch between the coil of the rotating electrical machine and the changeover switch. a normally open contact connected between the coils and closed in response to a detection signal from the detection element; a transformer connected in series with the normally open contact to lower the power supply voltage applied to the coil than during operation; A moisture-proofing device for a coil of a rotating electrical machine, characterized in that the coil is heated when the insulation resistance of the coil decreases while the rotating electrical machine is stopped.