Protective device for higher harmonic filter
专利汇可以提供Protective device for higher harmonic filter专利检索，专利查询，专利分析的服务。并且PURPOSE: To enable one to detect any small trouble and to protect the device rapidly and exactly by comparing two signals, which are detected from currents flowing in the divided harmonic filters and are proportional to currents in the resonance frequency band of the respective filters, with each other.
CONSTITUTION: The higher harmonic filter units 8 to 10 of required degrees are connected to the common bus 7 through the breakers 11 to 13, these units, which are designed such as to resonate to the n-th degree harmonic, are divided into components in terms of capacity as shown in 8a and 8b, for example. Also the currents flowing in the respective filters 8a, 8b are fed to the regulatable output devices 18a, 18b, which convert the secondary current into an arbitrary output signal and regulate it, through the current transformers 17a, 17b. Both signals are compared with each other in the band-pass filter 19, the protective relay 20 is operated to open the breaker 6 when the difference between both the signals is over the setting range. By this way, any small trouble can be exactly detected.
COPYRIGHT: (C)1979,JPO&Japio，下面是Protective device for higher harmonic filter专利的具体信息内容。
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