CN203503552U - Electromagnetic electrothermal relay - Google Patents

Electromagnetic electrothermal relay Download PDF

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Publication number
CN203503552U
CN203503552U CN201320590791.9U CN201320590791U CN203503552U CN 203503552 U CN203503552 U CN 203503552U CN 201320590791 U CN201320590791 U CN 201320590791U CN 203503552 U CN203503552 U CN 203503552U
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China
Prior art keywords
contact
normally
sheet
thermal relay
switch
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Active
Application number
CN201320590791.9U
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Chinese (zh)
Inventor
周军
范康林
陈梦军
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State Grid Corp of China SGCC
State Grid Sichuan Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Sichuan Electric Power Co Ltd
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Priority to CN201320590791.9U priority Critical patent/CN203503552U/en
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Abstract

The utility model relates to the relay field and more specifically refers to an electromagnetic electrothermal relay which comprises a normally open contact (1), a normally closed contact (2), a metal contact sheet (3) and bimetallic sheets (11); one end of the metal contact sheet (3) is fixedly hinged in an electrothermal relay through a shaft (5), and the other end is movably arranged between the normally open contact (1) and the normally closed contact (2); the other end is in contact with the normally closed contact (2) through the stretching of a return spring (4); the normally closed contact (2) and the metal contact sheet (3) are in series connection with a main circuit; an electromagnet (7) is arranged on a same side of the metal contact sheet (3) with the normally open contact (1) and is in series connection with a control loop series connected by power supply (8), protective resistor (9) and switches (10). One end of each bimetallic sheet (11) is arranged in a main circuit. The electromagnetic electrothermal relay has greatly improved anti-interference performance and sensitivity.

Description

A kind of electromagnetic type thermal relay
Technical field
The utility model relates to relay field, is specifically related to a kind of electromagnetic type thermal relay.
Background technology
Thermal relay is to produce heat by the electric current that flows into thermal element, makes the bimetal leaf generation deformation of the different coefficients of expansion, when deformation reaches certain distance; just promote connecting rod action, control circuit is disconnected, thereby make contactor dead electricity; main circuit disconnects, and realizes the overload protection of motor.Thermal relay is as the overload protection element of motor, and little with its volume, simple in structure, low cost and other advantages is widely applied aborning.At present, the thermal relay overwhelming majority is on the market all by heater element, bimetal leaf to be heated, and makes bimetal leaf generation deformation, promotes push rod action, control circuit is disconnected, thereby make contactor dead electricity, and main circuit disconnects.This thermal relay is actual usually can not execution due to the fault of push rod in using, and can not make main circuit disconnect, or when some bimetal leaf is due to other factors impacts, in the time of can not normally there is deformation, also can make thermal relay cisco unity malfunction.
Utility model content
The purpose of this utility model is to provide a kind of electromagnetic type thermal relay, solve because sheet metal thermal expansion distortion is not obvious, or push rod breaks down, and causes the sensitive not problem of thermal relay reaction.
For solving above-mentioned technical problem, the utility model by the following technical solutions: a kind of electromagnetic type thermal relay, comprises normally opened contact, normally-closed contact, Metal Contact sheet and bimetal leaf; One end of described Metal Contact sheet is fixedly hinged inner at thermal relay by axle, the other end is movably arranged between normally opened contact and normally-closed contact, and this other end is because the stretching of back-moving spring contacts with normally-closed contact, and described normally-closed contact and Metal Contact sheet are serially connected on main circuit; Be positioned at Metal Contact sheet the same side with normally opened contact and be provided with electromagnet; electromagnet is serially connected in the control loop being composed in series by power supply, protective resistance and switch; described bimetal leaf is that one end is arranged on main circuit; the other end withstands on the movable contact spring of switch, and after temperature distortion, described bimetal leaf drives the movable contact spring of switch closed.
Further technical scheme is, described and normally opened contact is positioned at Metal Contact sheet the same side and is provided with reset button.
Further technical scheme is, described switch has more than two, parallel with one another in control loop, and each switch mates bimetal leaf.
Further technical scheme is, described reset button comprises button shell, contact block and spring, and described button shell covers on contact block, contact block bottom socket spring, and the end of described contact block is near described Metal Contact sheet.
Compared with prior art, the beneficial effects of the utility model are: this electromagnetic type thermal relay is greatly improved in anti-interference, have avoided push rod to break down and cannot move the situation that causes thermal relay cisco unity malfunction, have improved sensitivity.
Accompanying drawing explanation
Fig. 1 is the connection diagram of a kind of electromagnetic type thermal relay of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows an embodiment of a kind of electromagnetic type thermal relay of the utility model: a kind of electromagnetic type thermal relay, comprises normally opened contact 1, normally-closed contact 2, Metal Contact sheet 3 and bimetal leaf 11; One end of described Metal Contact sheet 3 is fixedly hinged inner at thermal relay by axle 5, the other end is movably arranged between normally opened contact 1 and normally-closed contact 2, and this other end is because the stretching of back-moving spring 4 contacts with normally-closed contact 2, and described normally-closed contact 2 and Metal Contact sheet 3 are serially connected on main circuit; Be positioned at Metal Contact sheet 3 the same sides with normally opened contact 1 and be provided with electromagnet 7; electromagnet 7 is serially connected in the control loop being composed in series by power supply 8, protective resistance 9 and switch 10; described bimetal leaf 11 is that one end is arranged on main circuit; the other end withstands on the movable contact spring of switch 10, and after temperature distortion, described bimetal leaf 11 drives the movable contact spring of switch 10 closed.
According to a preferred embodiment of a kind of electromagnetic type thermal relay of the utility model: a kind of electromagnetic type thermal relay, comprises normally opened contact 1, normally-closed contact 2, Metal Contact sheet 3 and bimetal leaf 11; One end of described Metal Contact sheet 3 is fixedly hinged inner at thermal relay by axle 5, the other end is movably arranged between normally opened contact 1 and normally-closed contact 2, and this other end is because the stretching of back-moving spring 4 contacts with normally-closed contact 2, and described normally-closed contact 2 and Metal Contact sheet 3 are serially connected on main circuit; Be positioned at Metal Contact sheet 3 the same sides with normally opened contact 1 and be provided with electromagnet 7, electromagnet 7 is serially connected in the control loop being composed in series by power supply 8, protective resistance 9 and switch 10, described bimetal leaf 11 is that one end is arranged on main circuit, the other end withstands on the movable contact spring of switch 10, and after temperature distortion, described bimetal leaf 11 drives the movable contact spring of switch 10 closed; Described and normally opened contact 1 is positioned at Metal Contact sheet 3 the same sides and is provided with reset button 6, and this reset button 6, for breaking down after maintenance, allows thermal relay reply normal operating conditions again.
According to another preferred embodiment of a kind of electromagnetic type thermal relay of the utility model: a kind of electromagnetic type thermal relay, comprises normally opened contact 1, normally-closed contact 2, Metal Contact sheet 3 and bimetal leaf 11; One end of described Metal Contact sheet 3 is fixedly hinged inner at thermal relay by axle 5, the other end is movably arranged between normally opened contact 1 and normally-closed contact 2, and this other end is because the stretching of back-moving spring 4 contacts with normally-closed contact 2, and described normally-closed contact 2 and Metal Contact sheet 3 are serially connected on main circuit; Be positioned at Metal Contact sheet 3 the same sides with normally opened contact 1 and be provided with electromagnet 7, electromagnet 7 is serially connected in the control loop being composed in series by power supply 8, protective resistance 9 and switch 10, described bimetal leaf 11 is that one end is arranged on main circuit, the other end withstands on the movable contact spring of switch 10, and after temperature distortion, described bimetal leaf 11 drives the movable contact spring of switch 10 closed; Described switch 10 has more than two; parallel with one another in control loop, each switch 10 couplings have bimetal leaf 11, only need wherein the work in combination of one group of bimetal leaf 11 and switch 10; can play the effect of protection main circuit, the reliability and the sensitivity that have improved greatly thermal relay.
According to another preferred embodiment of a kind of electromagnetic type thermal relay of the utility model: a kind of electromagnetic type thermal relay, comprises normally opened contact 1, normally-closed contact 2, Metal Contact sheet 3 and bimetal leaf 11; One end of described Metal Contact sheet 3 is fixedly hinged inner at thermal relay by axle 5, the other end is movably arranged between normally opened contact 1 and normally-closed contact 2, and this other end is because the stretching of back-moving spring 4 contacts with normally-closed contact 2, and described normally-closed contact 2 and Metal Contact sheet 3 are serially connected on main circuit; Be positioned at Metal Contact sheet 3 the same sides with normally opened contact 1 and be provided with electromagnet 7, electromagnet 7 is serially connected in the control loop being composed in series by power supply 8, protective resistance 9 and switch 10, described bimetal leaf 11 is that one end is arranged on main circuit, the other end withstands on the movable contact spring of switch 10, and after temperature distortion, described bimetal leaf 11 drives the movable contact spring of switch 10 closed; Described reset button 6 comprises button shell, contact block and spring, and described button shell covers on contact block, contact block bottom socket spring, and the end of described contact block is near described Metal Contact sheet 3.
Operation principle of the present utility model is: when thermal relay is normally worked, and the bimetal leaf 11 generation deformation of being heated, but deformation deficiency is under normal circumstances so that switch 10 closures, and now Metal Contact sheet 3 is placed on normally-closed contact 2; When there is overload situations in main circuit, electric current in main circuit increases, make the temperature of bimetal leaf 11 continue to rise, larger deformation occurs, bimetal leaf 11 pull switch 10 closures, electromagnet 7 energisings attract Metal Contact sheet 3, now Metal Contact sheet 3 leaves normally-closed contact 2, is placed on normally opened contact 1, and control circuit is disconnected, thereby make contactor dead electricity, main circuit disconnects.After bimetal leaf 11 is cooling, press reset button 6, now iron staff 3 is placed on normally-closed contact 2 again.

Claims (4)

1. an electromagnetic type thermal relay, is characterized in that: comprise normally opened contact (1), normally-closed contact (2), Metal Contact sheet (3) and bimetal leaf (11); One end of described Metal Contact sheet (3) is fixedly hinged inner at thermal relay by axle (5), the other end is movably arranged between normally opened contact (1) and normally-closed contact (2), and this other end is because the stretching of back-moving spring (4) contacts with normally-closed contact (2), and described normally-closed contact (2) and Metal Contact sheet (3) are serially connected on main circuit; With normally opened contact (1) is positioned at Metal Contact sheet (3) the same side and is provided with electromagnet (7); electromagnet (7) is serially connected in the control loop being composed in series by power supply (8), protective resistance (9) and switch (10); described bimetal leaf (11) is that one end is arranged on main circuit; the other end withstands on the movable contact spring of switch (10), and after temperature distortion, described bimetal leaf (11) drives the movable contact spring of switch (10) closed.
2. a kind of electromagnetic type thermal relay according to claim 1, is characterized in that: described and normally opened contact (1) is positioned at Metal Contact sheet (3) the same side and is provided with reset button (6).
3. a kind of electromagnetic type thermal relay according to claim 1, is characterized in that: described switch (10) has more than two, parallel with one another in control loop, and each switch (10) coupling has bimetal leaf (11).
4. a kind of electromagnetic type thermal relay according to claim 1, it is characterized in that: described reset button (6) comprises button shell, contact block and spring, described button shell covers on contact block, contact block bottom socket spring, the end of described contact block is near described Metal Contact sheet (3).
CN201320590791.9U 2013-09-24 2013-09-24 Electromagnetic electrothermal relay Active CN203503552U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320590791.9U CN203503552U (en) 2013-09-24 2013-09-24 Electromagnetic electrothermal relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320590791.9U CN203503552U (en) 2013-09-24 2013-09-24 Electromagnetic electrothermal relay

Publications (1)

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CN203503552U true CN203503552U (en) 2014-03-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103489709A (en) * 2013-09-24 2014-01-01 国家电网公司 Electromagnetic type thermal relay
CN104319202A (en) * 2014-11-04 2015-01-28 大连理工常熟研究院有限公司 Control device for leakage protector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103489709A (en) * 2013-09-24 2014-01-01 国家电网公司 Electromagnetic type thermal relay
CN104319202A (en) * 2014-11-04 2015-01-28 大连理工常熟研究院有限公司 Control device for leakage protector

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