JPS59132337U - motor protection relay - Google Patents
motor protection relayInfo
- Publication number
- JPS59132337U JPS59132337U JP2525783U JP2525783U JPS59132337U JP S59132337 U JPS59132337 U JP S59132337U JP 2525783 U JP2525783 U JP 2525783U JP 2525783 U JP2525783 U JP 2525783U JP S59132337 U JPS59132337 U JP S59132337U
- Authority
- JP
- Japan
- Prior art keywords
- detection circuit
- signal
- motor
- load current
- outputs
- 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
- Protection Of Generators And Motors (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ブロック図、第２図
はこの考案のモータ保護継電器の一実施例のブロック図
である。
１・・・・・・変流器、２・・・・・・過電流検出回路
、３・・・・・・欠相検出回路、５・・・・・・積分回
路、６・・・・・・オア素子、７・・・・・・出力回路
、１０・・・・・・始動検出回路、１１・・・・・・ノ
ット素子、１２・・・・・・アンド素子。なお、図中同
一符号は同一または相当部分を示す。FIG. 1 is a block diagram of a conventional motor protection relay, and FIG. 2 is a block diagram of an embodiment of the motor protection relay of this invention. 1...Current transformer, 2...Overcurrent detection circuit, 3...Open phase detection circuit, 5...Integrator circuit, 6... ...OR element, 7...Output circuit, 10...Start detection circuit, 11...Knot element, 12...AND element. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
値以上の場合に過電流信号を出力する過電流検出回路、
上記負荷電流がモータ定格電流に対する所定の基準値を
越えたとき１．モータが始動しているとみなすとともに
この始動から所定時間経過後に始動信号を出力する始動
検出回路、上記始動信号が出力されている間は上記過電
流検出回路の動作を禁止状態となしかつ上記始動信号が
出力されていないときには上記過電流検出回路の動作が
可納状態となす手段、上記負荷電流より欠相を一定時間
検出すると欠相トリップ信号を出力する欠相検出回路を
備えてなるモータ保護継電器。a current transformer that detects a load current; an overcurrent detection circuit that outputs an overcurrent signal when the load current is equal to or higher than a predetermined reference value;
When the load current exceeds a predetermined reference value for the motor rated current: 1. A start detection circuit that assumes that the motor has started and outputs a start signal after a predetermined period of time has elapsed since the start; and a start detection circuit that prohibits the operation of the overcurrent detection circuit while the start signal is being output, and the start of the motor. A motor protection device comprising means for making the operation of the overcurrent detection circuit normal when no signal is output, and an open phase detection circuit that outputs an open phase trip signal when an open phase is detected from the load current for a certain period of time. relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2525783U JPS59132337U (en) | 1983-02-23 | 1983-02-23 | motor protection relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2525783U JPS59132337U (en) | 1983-02-23 | 1983-02-23 | motor protection relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59132337U true JPS59132337U (en) | 1984-09-05 |
Family
ID=30156247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2525783U Pending JPS59132337U (en) | 1983-02-23 | 1983-02-23 | motor protection relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59132337U (en) |
-
1983
- 1983-02-23 JP JP2525783U patent/JPS59132337U/en active Pending
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