JPH0326240U - - Google Patents
Info
- Publication number
- JPH0326240U JPH0326240U JP8577389U JP8577389U JPH0326240U JP H0326240 U JPH0326240 U JP H0326240U JP 8577389 U JP8577389 U JP 8577389U JP 8577389 U JP8577389 U JP 8577389U JP H0326240 U JPH0326240 U JP H0326240U
- Authority
- JP
- Japan
- Prior art keywords
- motor
- protection device
- current
- detects
- power supply
- 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
- 238000004804 winding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Protection Of Generators And Motors (AREA)
Description
第１図はこの考案の一実施例による電動機保護
装置を示す単線図、第２図は電動機保護装置の電
流に対する動作特性を説明する説明図、第３図は
従来の電動機保護装置を示す単線図、第４図は第
１図の電動機保護装置を説明するロジツク図であ
る。
図において、１……電動機、２……しや断器、
３……計器用変流器、４……過電流継電装置、５
……温度測定素子、６……過負荷／拘束保護継電
装置である。なお、図中同一符号は同一、又は相
当部分を示す。
Fig. 1 is a single line diagram showing a motor protection device according to an embodiment of this invention, Fig. 2 is an explanatory diagram explaining the operating characteristics of the motor protection device with respect to current, and Fig. 3 is a single line diagram showing a conventional motor protection device. , FIG. 4 is a logic diagram illustrating the motor protection device of FIG. 1. In the figure, 1... electric motor, 2... breaker,
3... Instrument current transformer, 4... Overcurrent relay device, 5
. . . Temperature measuring element, 6 . . . Overload/restriction protection relay device. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
用変流器と、この計器用変流器で計測された電流
値が所定の電流・時間特性になつたとき信号を出
力する継電装置と、この継電装置から出力された
信号により動作して上記電動機の電源回路を断つ
しや断器とを備えた電動機保護装置において、上
記電動機の巻線の温度を検出し、該温度が設定さ
れた許容値をこえたとき上記しや断器を動作させ
るとともに、該しや断器の再投入を防止すること
を特徴とする電動機保護装置。 An instrument current transformer that measures the current flowing in the power supply circuit of a motor; a relay device that outputs a signal when the current value measured by the instrument current transformer reaches a predetermined current/time characteristic; A motor protection device that is operated by a signal output from a relay device to disconnect the power supply circuit of the motor, detects the temperature of the windings of the motor, and detects the temperature within the set tolerance. A motor protection device characterized in that when a value exceeds a value, the above-mentioned shutoff switch is activated, and the shutoff switch is prevented from being turned on again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8577389U JPH0326240U (en) | 1989-07-20 | 1989-07-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8577389U JPH0326240U (en) | 1989-07-20 | 1989-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0326240U true JPH0326240U (en) | 1991-03-18 |
Family
ID=31635072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8577389U Pending JPH0326240U (en) | 1989-07-20 | 1989-07-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0326240U (en) |
-
1989
- 1989-07-20 JP JP8577389U patent/JPH0326240U/ja active Pending
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