JPH0170168U

JPH0170168U -

Info

Publication number: JPH0170168U
Application number: JP1987165572U
Authority: JP
Priority date: 1987-10-29
Filing date: 1987-10-29
Publication date: 1989-05-10

Description

[Brief explanation of the drawing]

第１図はこの考案の電力計測装置の一実施例を
示すブロツク図、第２図は要部を詳細に示すブロ
ツク図、第３図は他の実施例を示すブロツク図、
第４図はさらに他の実施例を示す要部概略ブロツ
ク図。１……給電系統、２……カレントトランス、４
……実効値化処理回路、５……積算処理回路、６
……電力値判別回路、８……力率設定回路、９…
…微調整回路、１０……電圧設定回路。 FIG. 1 is a block diagram showing one embodiment of the power measuring device of this invention, FIG. 2 is a block diagram showing main parts in detail, and FIG. 3 is a block diagram showing another embodiment.
FIG. 4 is a schematic block diagram of main parts showing still another embodiment. 1...Power supply system, 2...Current transformer, 4
... Effective value conversion processing circuit, 5 ... Integration processing circuit, 6
...Power value discrimination circuit, 8...Power factor setting circuit, 9...
...Fine adjustment circuit, 10...Voltage setting circuit.

Claims

[Claims for Utility Model Registration] 1. Current detection means for detecting the current corresponding to the fundamental wave, fundamental wave voltage setting means, fundamental wave power factor setting means, and integrating means for integrating the output signals from the current detection means. and processing means for generating a power measurement result signal by inputting the output signal from the fundamental wave voltage setting means, the fundamental wave power factor setting means, and the integrating means. 2. The power measuring device according to claim 1, wherein the current detection means includes a current transformer, a waveform shaping section, and an amplification section. 3. The power measuring device according to claim 2, wherein the current detection section also has an effective value conversion section. 4 Claim 2 or 3 of the above utility model registration claim in which the waveform shaping section has a low-pass filter
The power measuring device described in section. 5. The power measuring device according to claim 1, wherein the fundamental voltage setting means is set to a value corresponding to the fundamental voltage of the power source type to be measured. 6. The power measuring device according to claim 5, wherein the value corresponding to the set fundamental wave voltage is a value corresponding to an effective value. 7. The electric power according to any one of claims 1, 5, or 6 of the above utility model registration claim, wherein the fundamental wave voltage setting means is integrally incorporated in the integrating means or the processing means. Measuring device. 8. The power measuring device according to claim 1, wherein the fundamental wave power factor setting means sets a power factor corresponding to the measurement path. 9. The power measuring device according to claim 8, wherein the fundamental wave power factor setting means includes power factor adjusting means for changing the set power factor. 10. The power measuring device according to claim 1, wherein the integrating means includes an averaging circuit and a voltage controlled oscillator that receives an output voltage signal from the averaging circuit. 11. The power measuring device according to claim 10, wherein the processing device includes a counter that outputs a count signal when the number of pulses output from the voltage controlled oscillator reaches a predetermined value.