JPS58143436U - motor protection relay - Google Patents
motor protection relayInfo
- Publication number
- JPS58143436U JPS58143436U JP3932082U JP3932082U JPS58143436U JP S58143436 U JPS58143436 U JP S58143436U JP 3932082 U JP3932082 U JP 3932082U JP 3932082 U JP3932082 U JP 3932082U JP S58143436 U JPS58143436 U JP S58143436U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- unbalance rate
- protection relay
- determination circuit
- motor protection
- 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
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来のモータ保護継電器の概略構成図、第２図
は本考案に係るモータ保護継電器の概略構成図である。
各図中、同一部材には同一符号を付し、１０は変流器、
１２は過電流検出装置、１４は不平衡率判定回路、１４
ａは起動時不平衡率判定回路、１４ｂは運転時不平衡率
判定回路、１８はリレー回路、２２は起動時間設定器、
１２ａは過電流検出回路、１２ｂは時間設定回路、２０
はアンド回路、１６はオア回路、２４は／ット回路であ
る。
補正 昭５７． ７．２６ −
実用新案登録藷求の範囲を次のように補正する。
０実用新案登録請求の範囲
（１） 三相モータ主回路の負荷電流を検出する麦流
° 器と、前記変流−によって検出された負荷電流が
所定時間継続して設定基準値をｉえたときに、 過電
流信号を出力する過電流検出装置と、前記変流器によっ
て検出された負荷電流の不平衡率−を演算し該不平衡率
が設定基準値を越えたとき不平衡信号を出力する不平衡
率判定回路と、前記過電流信号と不平衡信号との少なく
とも一方が出力されたときに主回路を開放するリレー回
゛路と、を含むモータ保護継電器において、モータの起
動後所定時間起動信号を出力する起動時間設定器を有し
該起動時間設定器の起動信号比ることを特徴とするモー
タ保護継電器。
（２）１実用新案登録請求の範囲（１）記載のモータ保
護ｉ電器において、不平衡率判定回路は鰻定基準値が高
く設定された起動待不平衡率判定回路と設定基準値が低
く設定された運転時不平衡率判定回路とから成り、起動
時間設定器の起動信号出力中は負荷電流の不平衡率を起
動待不平衡率判定回路によｐて判定し前記起動時間設定
器の−起動信号停止後は運転時不平衡率判定回路によっ
てそれぞれ判定する三とを特徴とするモータ保護継電器
。FIG. 1 is a schematic configuration diagram of a conventional motor protection relay, and FIG. 2 is a schematic configuration diagram of a motor protection relay according to the present invention. In each figure, the same members are given the same symbols, and 10 is a current transformer;
12 is an overcurrent detection device, 14 is an unbalance rate determination circuit, 14
a is a startup unbalance rate determination circuit, 14b is an operation unbalance rate determination circuit, 18 is a relay circuit, 22 is a startup time setter,
12a is an overcurrent detection circuit, 12b is a time setting circuit, 20
is an AND circuit, 16 is an OR circuit, and 24 is an /et circuit. Correction 1984. 7.26 - The scope of the request for utility model registration shall be amended as follows: 0 Scope of Utility Model Registration Claims (1) When the load current detected by the current transformer and the current transformer that detects the load current of the three-phase motor main circuit exceeds the set standard value for a predetermined period of time. an overcurrent detection device that outputs an overcurrent signal; and an overcurrent detection device that calculates an unbalance rate of the load current detected by the current transformer and outputs an unbalance signal when the unbalance rate exceeds a set reference value. A motor protection relay that includes an unbalance rate determination circuit and a relay circuit that opens the main circuit when at least one of the overcurrent signal and the unbalance signal is output, A motor protection relay comprising a starting time setting device that outputs a signal and comparing the starting signal of the starting time setting device. (2) 1 Utility Model Registration In the motor protection appliance described in claim (1), the unbalance rate determination circuit has a start-up unbalance rate determination circuit with a high eel standard value and a low set standard value. and a running unbalance rate determination circuit, and while the startup time setter is outputting the startup signal, the startup unbalance rate determination circuit determines the unbalance rate of the load current. A motor protection relay characterized in that after the start signal is stopped, each determination is made by an unbalance rate determination circuit during operation.
Claims (2)
、前記変流器によって検出された負荷電流が所定時間継
続して設定基準値を越えたときに過電流信号を出力する
過電流検出装置と、前記変流器によって検出された負荷
電流の不平衡率を演算し該不平衡率が設定基準値を越え
たとき不平衡信号を出力する不平衡率判定回路と、前記
過電流信号と不平衡信号との少くとも一方が出力された
ときに主回路を開放するリレー′回路と、を含むモータ
保護継電器において、モータの起動後所定時間起動信号
を出力する起動時間設定器を有し該起動時間設定器の起
動信号出力中は前記設定基準値を高く設定し前記起動時
間設定器の起動信号停止後は設定基準値を低く設定する
ことを特徴とするモータ保護継電器。(1) A current transformer that detects the load current of the three-phase motor main circuit, and an overcurrent signal that outputs an overcurrent signal when the load current detected by the current transformer exceeds a set reference value for a predetermined period of time. a current detection device; an unbalance rate determination circuit that calculates an unbalance rate of the load current detected by the current transformer and outputs an unbalance signal when the unbalance rate exceeds a set reference value; and the overcurrent A motor protection relay that includes a relay circuit that opens the main circuit when at least one of a signal and an unbalanced signal is output, and that has a start time setting device that outputs a start signal for a predetermined period of time after the motor starts. A motor protection relay characterized in that the setting reference value is set high while the starting signal from the starting time setting device is being output, and the setting reference value is set low after the starting signal from the starting time setting device is stopped.
継電器において、不平衡率判定回路は設定基準値が高く
設定された起動時不平衡率判定回路と設定基準値が低く
設定された運転時不平衡率判定回路とから成り、起動時
間設定器の起動信号出力中は負荷電流の不平衡率を起動
時不平衡率判定回路によって判定し前記起動時間設定器
の起動信号停止後は運転時不衡率判定回路によってそれ
ぞれ判定することを特徴とするモータ保護継電器。。(2) Scope of Utility Model Registration Claim (1) In the motor protection relay described in (1), the unbalance rate determination circuit includes a startup unbalance rate determination circuit with a high set standard value and an operation time with a low set standard value. The unbalance rate determination circuit determines the unbalance rate of the load current while the start signal from the start time setter is being output, and after the start signal from the start time setter has stopped, the unbalance rate of the load current is determined by the start time setter. A motor protection relay characterized in that each determination is made by an unbalance rate determination circuit. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3932082U JPS58143436U (en) | 1982-03-19 | 1982-03-19 | motor protection relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3932082U JPS58143436U (en) | 1982-03-19 | 1982-03-19 | motor protection relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58143436U true JPS58143436U (en) | 1983-09-27 |
Family
ID=30050610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3932082U Pending JPS58143436U (en) | 1982-03-19 | 1982-03-19 | motor protection relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58143436U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4331239Y1 (en) * | 1968-05-23 | 1968-12-18 |
-
1982
- 1982-03-19 JP JP3932082U patent/JPS58143436U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4331239Y1 (en) * | 1968-05-23 | 1968-12-18 |
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