JPS6152430U - - Google Patents
Info
- Publication number
- JPS6152430U JPS6152430U JP13582084U JP13582084U JPS6152430U JP S6152430 U JPS6152430 U JP S6152430U JP 13582084 U JP13582084 U JP 13582084U JP 13582084 U JP13582084 U JP 13582084U JP S6152430 U JPS6152430 U JP S6152430U
- Authority
- JP
- Japan
- Prior art keywords
- comparators
- outputs
- circuit
- phase
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 2
- 230000018199 S phase Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図はこの考案の一実施例に係る欠相検出器
を示す電気的構成図、第２図は上記実施例装置の
検出動作を説明するタイムチヤートであり、同図
Ａは三相健全時、同図ＢはＲ相欠相時、同図Ｃは
Ｓ欠相時および同図ＤはＴ相欠相時のタイムチヤ
ートをそれぞれ示す。
１，２……コンパレータ、３……ＡＮＤ回路、
４……モノマルチバイブータ、ＣＴＲ，ＣＴＴ…
…変流器、Ｍ……三相誘導電動機、ＲＲ，ＲＴ…
…抵抗負荷、Ｖｏ……基準電圧。
Fig. 1 is an electrical configuration diagram showing an open phase detector according to an embodiment of this invention, Fig. 2 is a time chart explaining the detection operation of the above embodiment device, and Fig. A is a three-phase normal state diagram. , Figure B shows a time chart when the R phase is open, Figure C shows a time chart when the S phase is open, and Figure D shows a time chart when the T phase is open. 1, 2...Comparator, 3...AND circuit,
4...Mono multi-vibrator, CTR, CTT...
...Current transformer, M...Three-phase induction motor, RR, RT...
...Resistive load, Vo...Reference voltage.
Claims (1)
それぞれ配置された変流器と、 前記２つの変流器の各二次側電圧と共通基準電
圧とをそれぞれ比較する２つのコンパレータと、 前記２つのコンパレータの各出力の論理積の結
果を出力する論理積回路と、 前記論理積回路の出力パルスに応答して所定時
間幅の単発パルスを発生する単発パルス発生回路
とを備えたことを特徴とする欠相検出器。[Claims for Utility Model Registration] A current transformer arranged in each of two phases of a three-phase power line that supplies power to a three-phase load, a secondary voltage of each of the two current transformers, and a common reference voltage. two comparators that respectively compare the outputs of the two comparators, an AND circuit that outputs the result of the AND of the respective outputs of the two comparators, and a single pulse that generates a single pulse of a predetermined time width in response to the output pulse of the AND circuit. An open phase detector comprising a pulse generating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13582084U JPS6152430U (en) | 1984-09-07 | 1984-09-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13582084U JPS6152430U (en) | 1984-09-07 | 1984-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6152430U true JPS6152430U (en) | 1986-04-09 |
Family
ID=30694305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13582084U Pending JPS6152430U (en) | 1984-09-07 | 1984-09-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6152430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105385U (en) * | 1987-12-28 | 1989-07-17 | ||
| JP2004023878A (en) * | 2002-06-14 | 2004-01-22 | Yaskawa Electric Corp | Converter with power supply phase interruption detection circuit |
-
1984
- 1984-09-07 JP JP13582084U patent/JPS6152430U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01105385U (en) * | 1987-12-28 | 1989-07-17 | ||
| JP2004023878A (en) * | 2002-06-14 | 2004-01-22 | Yaskawa Electric Corp | Converter with power supply phase interruption detection circuit |