发明名称 |
TEMPERATURE PICKUP FOR OIL-FILLED VESSELS AND TEMPERATURE MEASUREMENT METHOD |
摘要 |
A temperature pickup for an oil-filled transformer or tap changer has within a resistance thermometer standard housing, the circuitry for duty-factor-modulated output of a measurement signal, interference circuitry which can slur the resulting wave form and an interface circuit which subjects the output signal to polarity reversal to produce an output symmetrical with respect to ground potential. This enables zero crossings to be detected and the time lapse between zero crossings or passages to be ascertained and the temperature calculated from the duty-factor ratio.
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申请公布号 |
CA2271564(A1) |
申请公布日期 |
1999.11.14 |
申请号 |
CA19992271564 |
申请日期 |
1999.05.13 |
申请人 |
MASCHINENFABRIK REINHAUSEN GMBH |
发明人 |
STADELMAYER, MANFRED;VIERECK, KARSTEN |
分类号 |
H01F27/12;G01D5/246;G01D21/00;G01K7/00;G01K7/01;H01F27/00;H03K9/08;(IPC1-7):G01K13/00;G01K1/00;G01K1/02 |
主分类号 |
H01F27/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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