JPH0567149U - Electrical equipment protection device - Google Patents
Electrical equipment protection deviceInfo
- Publication number
- JPH0567149U JPH0567149U JP619192U JP619192U JPH0567149U JP H0567149 U JPH0567149 U JP H0567149U JP 619192 U JP619192 U JP 619192U JP 619192 U JP619192 U JP 619192U JP H0567149 U JPH0567149 U JP H0567149U
- Authority
- JP
- Japan
- Prior art keywords
- movable contactor
- contact
- bimetal movable
- bimetal
- overcurrent
- 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.)
- Withdrawn
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
(57)【要約】
【目的】保守が面倒でなく、しかも誤動作を防止できる
電気機器用保護装置を提供する。
【構成】電源１から電気機器２に通電する閉ループ３
に、バイメタル可動接触子４とこのバイメタル可動接触
子４に通常の電流が流れている時にこのバイメタル可動
接触子４が接触している第１の固定接点５とを直列に接
続する。バイメタル可動接触子４に過電流が流れてこの
バイメタル可動接触子４が変形した時に接触する第２の
固定接点６には、この過電流を抑制するインピーダンス
７を介して電気機器２に通電する保護回路８を接続す
る。
(57) [Abstract] [Purpose] To provide a protective device for electric equipment, which does not require troublesome maintenance and can prevent malfunction. [Structure] Closed loop 3 for energizing electric equipment 2 from power supply 1
Then, the bimetal movable contactor 4 and the first fixed contact 5 with which the bimetal movable contactor 4 is in contact when a normal current is flowing through the bimetal movable contactor 4 are connected in series. The second fixed contact 6 that comes into contact when the bimetal movable contactor 4 is deformed by the overcurrent flowing through the bimetal movable contactor 4 is protected by energizing the electric device 2 through the impedance 7 that suppresses this overcurrent. The circuit 8 is connected.
Description
【０００１】[0001]
本考案は、過電流から電気機器を保護する電気機器用保護装置に関するもので ある。 The present invention relates to a protective device for electric equipment that protects electric equipment from overcurrent.
【０００２】[0002]
従来、過電流に対する電気機器の保護は、ヒューズ又はノーヒューズブレーカ ーで行っていた。 Conventionally, fuses or no-fuse breakers have been used to protect electrical equipment against overcurrent.
【０００３】[0003]
しかしながら、ヒューズの場合は、過電流時に溶断したヒューズを交換しなけ ればならず、保守が面倒になる問題点がある。その上、使用雰囲気等により、事 故でないのに自然断線し、誤動作の原因になる問題点がある。 However, in the case of a fuse, there is a problem that maintenance must be troublesome because the fuse that has blown out must be replaced when the overcurrent flows. In addition, depending on the usage environment, there is a problem that the wire will spontaneously break even if it is not due to malfunction, which may cause malfunction.
【０００４】 一方、ノーヒューズブレーカーの場合は、事故でもないのに誤動作し、２次電 圧がなくなり、保護リレー等の誤動作を誘発する問題点がある。On the other hand, in the case of the no-fuse breaker, there is a problem that the malfunction occurs even though it is not an accident, the secondary voltage disappears, and the malfunction of the protection relay or the like is induced.
【０００５】 本考案の目的は、保守が面倒でなく、しかも誤動作を防止できる電気機器用保 護装置を提供することにある。An object of the present invention is to provide a protective device for an electric device, which does not require troublesome maintenance and can prevent malfunction.
【０００６】[0006]
上記の目的を達成する本考案の構成を説明すると、本考案の電気機器用保護装 置は、電源から電気機器に通電する閉ループにバイメタル可動接触子と該バイメ タル可動接触子に通常の電流が流れている時に該バイメタル可動接触子が接触し ている第１の固定接点とが直列に接続され、該バイメタル可動接触子に過電流が 流れて該バイメタル可動接触子が変形した時に接触する第２の固定接点に該過電 流を抑制するインピーダンスを介して前記電気機器に通電する保護回路が設けら れていることを特徴とする。 To explain the configuration of the present invention that achieves the above-mentioned object, the protective device for electric equipment of the present invention is characterized in that a bimetal movable contactor and a normal current flow through the bimetal movable contactor in a closed loop for energizing the electric equipment from a power source. A second fixed contact, which is in contact with the bimetal movable contact while flowing, is connected in series when an overcurrent flows in the bimetal movable contact and the bimetal movable contact is deformed. The fixed contact is provided with a protection circuit for energizing the electric device through the impedance for suppressing the overcurrent.
【０００７】[0007]
このような電気機器用保護装置は、通常はバイメタル可動接触子が第１の固定 接点に接触していて、これらバイメタル可動接触子及び第１の固定接点を介して 電源から電気機器に通電する。 In such a protective device for an electric device, the bimetal movable contact is usually in contact with the first fixed contact, and the electric device is energized through the bimetal movable contact and the first fixed contact.
【０００８】 該バイメタル可動接触子に過電流が流れた時には、該バイメタル可動接触子が 変形して第２の固定接点に接触する。この状態になると、該過電流を抑制するイ ンピーダンスを有する保護回路を経て電気機器に通電するようになる。従って、 電気機器を過電流から保護することができる。When an overcurrent flows through the bimetal movable contactor, the bimetal movable contactor is deformed and comes into contact with the second fixed contact. In this state, electric equipment is energized through a protection circuit having an impedance that suppresses the overcurrent. Therefore, the electric device can be protected from overcurrent.
【０００９】[0009]
図１及び図２は、本考案に係る電気機器用保護装置の一実施例を示したもので ある。 1 and 2 show an embodiment of a protective device for electric equipment according to the present invention.
【００１０】 本実施例の電気機器用保護装置は、電源１から電気機器２に通電する閉ループ ３にバイメタル可動接触子４と該バイメタル可動接触子４に通常の電流が流れて いる時に該バイメタル可動接触子４が接触している第１の固定接点５とが直列に 接続されている。バイメタル可動接触子４は、熱膨張率の異なる金属４ａ，４ｂ を積層した構造になっている。The protective device for an electric device according to the present embodiment includes a bimetal movable contactor 4 and a bimetal movable contactor 4 when a normal current is flowing in the closed loop 3 for energizing the electric device 2 from a power source 1. The first fixed contact 5 with which the contactor 4 is in contact is connected in series. The bimetal movable contactor 4 has a structure in which metals 4a and 4b having different thermal expansion coefficients are laminated.
【００１１】 該バイメタル可動接触子４に過電流が流れて該バイメタル可動接触子４が変形 した時に接触する第２の固定接点６には、該過電流を抑制するインピーダンス７ を介して電気機器２に通電する保護回路８が設けられている。The second fixed contact 6 that contacts when the bimetal movable contact 4 is deformed by the overcurrent flowing through the bimetal movable contact 4 is connected to the electric device 2 through the impedance 7 that suppresses the overcurrent. A protection circuit 8 is provided for energizing the.
【００１２】 この場合、バイメタル可動接触子４と第１の固定接点５と第２の固定接点６と によりバイメタルスイッチ９を構成している。In this case, the bimetal movable contactor 4, the first fixed contact 5, and the second fixed contact 6 constitute a bimetal switch 9.
【００１３】 このような電気機器用保護装置では、通常の電流が流れている時には、バイメ タル可動接触子４が第１の固定接点５に接触していて、低インピーダンスの閉ル ープ３から電気機器２に通電する。In such a protective device for an electric device, when the normal current is flowing, the bimovable movable contactor 4 is in contact with the first fixed contact 5, and the low impedance closed loop 3 is removed from the closed loop 3. The electric device 2 is energized.
【００１４】 事故等により、バイメタル可動接触子４に過電流が流れた時には、該バイメタ ル可動接触子４の損失が急激に増大し、該バイメタル可動接触子４の温度が上昇 し、該バイメタル可動接触子４が変形して第２の固定接点６に接触する。これに より過電流が保護回路８を通して流れるように回路が切り替わり、該過電流がイ ンピーダンス７で抑制され、電気機器２の焼損を防止する。When an overcurrent flows through the bimetal movable contact 4 due to an accident or the like, the loss of the bimetal movable contact 4 rapidly increases, the temperature of the bimetal movable contact 4 rises, and the bimetal movable contact 4 increases. The contactor 4 is deformed and comes into contact with the second fixed contact 6. As a result, the circuit is switched so that the overcurrent flows through the protection circuit 8, the overcurrent is suppressed by the impedance 7, and the electric device 2 is prevented from being burnt.
【００１５】 事故等が除去されると、通常の電流が流れるようになり、バイメタル可動接触 子４の温度が低下し、該バイメタル可動接触子４が自動的に第１の固定接点５に 接触され、通常の状態に戻る。When an accident or the like is removed, a normal current starts to flow, the temperature of the bimetal movable contact 4 is lowered, and the bimetal movable contact 4 is automatically brought into contact with the first fixed contact 5. , Return to normal state.
【００１６】 また、万一バイメタル可動接触子４が誤動作したとしても、保護回路８が断線 しないため、ヒューズやノーヒューズブレーカーと異なり、電流が流れるので図 示しない保護リレーの誤動作を防止できる。Further, even if the bimetal movable contact 4 malfunctions, the protection circuit 8 does not break, and unlike the fuse and the no-fuse breaker, a current flows, so that the malfunction of the protection relay not shown can be prevented.
【００１７】 また、これまでのヒューズのようにヒューズの交換や、ノーヒューズブレーカ ーのように復旧を電気機器２の設置場所まで行って行う必要がないため、変電所 の無人化，省人化を図れる。Further, unlike the conventional fuses, it is not necessary to replace the fuses or to perform the restoration to the place where the electric device 2 is installed unlike the no-fuse breaker, which makes the substation unmanned and labor-saving. Can be achieved.
【００１８】[0018]
以上説明したように本考案に係る電気機器用保護装置は、通常はバイメタル可 動接触子が第１の固定接点に接触していて、これらを介して電源から電気機器に 通電するが、事故等により該バイメタル可動接触子に過電流が流れた時には、該 バイメタル可動接触子が変形して第２の固定接点に接触し、この状態になると該 過電流を抑制するインピーダンスを有する保護回路を経て電気機器に通電するよ うになる構造としたので、電気機器を過電流から保護することができる。 As described above, in the protective device for an electric device according to the present invention, the bimetal movable contact is normally in contact with the first fixed contact, and the electric power is supplied from the power source to the first fixed contact through the contact. When an overcurrent flows through the bimetal movable contactor, the bimetal movable contactor is deformed and comes into contact with the second fixed contact. In this state, electricity is passed through a protection circuit having an impedance that suppresses the overcurrent. Since the structure is such that the equipment is energized, electrical equipment can be protected from overcurrent.
【００１９】 また、この電気機器用保護装置は、事故等が除去され電流が通常の電流に戻る と、バイメタル可動接触子の温度が低下し、該バイメタル可動接触子が自動的に 第１の固定接点に接触する通常の状態に戻るので、保守に手間がかからない利点 がある。In addition, in this electrical equipment protection device, when an accident or the like is removed and the current returns to a normal current, the temperature of the bimetal movable contact decreases, and the bimetal movable contact automatically moves to the first fixed position. Since it returns to the normal state of contacting the contacts, there is an advantage that maintenance is not required.
【００２０】 また、この電気機器用保護装置は、万一バイメタル可動接触子が誤動作したと しても、保護回路が断線しないため、ヒューズやノーヒューズブレーカーと異な り、保護リレーの誤動作を防止することができる。Further, in this protective device for electric equipment, even if the bimetal movable contactor malfunctions, the protection circuit does not break, so unlike a fuse or a no-fuse breaker, a malfunction of the protection relay is prevented. be able to.
【００２１】 更に、この電気機器用保護装置は、従来のヒューズのようにヒューズの交換や 、ノーヒューズブレーカーのように復旧を電気機器の設置場所まで行って行う必 要がないため、変電所の無人化，省人化を図ることができる。Further, this electric device protection device does not need to replace the fuse like a conventional fuse or to restore the electric device to the installation place like a no-fuse breaker. Unmanned and labor-saving can be achieved.
【図１】本考案に係る電気機器用保護装置の一実施例の
通常の状態を示す回路図である。FIG. 1 is a circuit diagram showing a normal state of an embodiment of a protective device for an electric device according to the present invention.
【図２】図１に示す電気機器用保護装置の過電流が流れ
た状態を示す回路図である。FIG. 2 is a circuit diagram showing a state in which an overcurrent has flowed in the protective device for an electric device shown in FIG.
１…電源、２…電気機器、３…閉ループ、４…バイメタ
ル可動接触子、５…第１の固定接点、６…第２の固定接
点、７…インピーダンス、８…保護回路、９…バイメタ
ルスイッチ。DESCRIPTION OF SYMBOLS 1 ... Power supply, 2 ... Electrical equipment, 3 ... Closed loop, 4 ... Bimetal movable contactor, 5 ... 1st fixed contact, 6 ... 2nd fixed contact, 7 ... Impedance, 8 ... Protection circuit, 9 ... Bimetal switch.
Claims (1)
バイメタル可動接触子と該バイメタル可動接触子に通常
の電流が流れている時に該バイメタル可動接触子が接触
している第１の固定接点とが直列に接続され、該バイメ
タル可動接触子に過電流が流れて該バイメタル可動接触
子が変形した時に接触する第２の固定接点に該過電流を
抑制するインピーダンスを介して前記電気機器に通電す
る保護回路が設けられていることを特徴とする電気機器
用保護装置。1. A bimetal movable contactor and a first fixed contact with which the bimetal movable contactor is in contact with the bimetal movable contactor when a normal current flows through the bimetal movable contactor in a closed loop for energizing an electric device from a power source. A protection that energizes the electric device through a second fixed contact that is connected in series and contacts when the bimetal movable contactor is deformed by the overcurrent flowing through the bimetal movable contactor through an impedance that suppresses the overcurrent. A protective device for electric equipment, which is provided with a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP619192U JPH0567149U (en) | 1992-02-17 | 1992-02-17 | Electrical equipment protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP619192U JPH0567149U (en) | 1992-02-17 | 1992-02-17 | Electrical equipment protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0567149U true JPH0567149U (en) | 1993-09-03 |
Family
ID=11631668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP619192U Withdrawn JPH0567149U (en) | 1992-02-17 | 1992-02-17 | Electrical equipment protection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0567149U (en) |
-
1992
- 1992-02-17 JP JP619192U patent/JPH0567149U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19960606 |