| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily monitor existence of gas in an oil-impregnated vacuum type OLTC device. <P>SOLUTION: A failed gas alarm system includes: a gas sensor constituted so that fluid connection is performed to an oil valve in an oil-impregnated vacuum type on-load tap changeover unit (OLTC), and for monitoring a gas level in oil in the oil valve; and a 2-level alarm system electrically connected to the gas sensor, in which the 2-level alarm system includes a visual alarm indicator constituted so as to provide a visual alarm in response to reception of display showing that the gas level in the oil exceeds a threshold. <P>COPYRIGHT: (C)2013,JPO&INPIT |
