CN212063475U - Novel residual current circuit breaker - Google Patents
Novel residual current circuit breaker Download PDFInfo
- Publication number
- CN212063475U CN212063475U CN202020940692.9U CN202020940692U CN212063475U CN 212063475 U CN212063475 U CN 212063475U CN 202020940692 U CN202020940692 U CN 202020940692U CN 212063475 U CN212063475 U CN 212063475U
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- circuit breaker
- residual current
- tripping device
- detection control
- control circuit
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Abstract
The utility model discloses a novel residual current circuit breaker, which comprises a zero sequence transformer, a detection control circuit, a tripping device and a mechanical mechanism, wherein the zero sequence transformer is powered by mains supply and used for detecting the residual current of the circuit breaker; the tripping device adopts an electromagnetic tripping device; the electronic switch is connected with the detection control circuit and is simultaneously connected to the tripping device; a high-resistance divider resistor is connected in series with a passage of the mains supply. The utility model has the advantages of it is following and effect: the circuit can work normally without a power circuit, thereby simplifying the number of electronic elements and the wiring layout; meanwhile, the safety of the circuit breaker can be effectively improved.
Description
Technical Field
The utility model relates to a circuit breaker technical field, in particular to novel residual current circuit breaker.
Background
The earth leakage breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a predetermined time.
The existing residual current circuit breaker has the following problems: on one hand, an electronic release is generally adopted in the residual current circuit breaker, and meanwhile, a silicon controlled rectifier is configured as a switch to achieve the purpose of final release; however, this requires a corresponding power supply circuit to be configured in the circuit, so as to adapt the voltages of the electronic release and the thyristor; this results in the disadvantages of high cost, multiple circuit elements and complex circuit. On the other hand, in order to reduce the impact, such a residual current circuit breaker is generally provided with a varistor for voltage protection, which is also called a linear resistor or a varistor. However, the varistor has an aging process caused by a large amount of discharge, and is used as a vulnerable component, so that the varistor has the hidden danger of fire hazard of the circuit breaker caused by continuous temperature rise after being damaged.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel residual current circuit breaker to solve the problem that the background art center exists.
The above technical purpose of the present invention can be achieved by the following technical solutions: a novel residual current circuit breaker comprises a zero sequence transformer, a detection control circuit, a tripping device and a mechanical mechanism, wherein the zero sequence transformer is powered by mains supply and used for detecting the residual current of the circuit breaker;
the tripping device adopts an electromagnetic tripping device;
the electronic switch is connected to the electromagnetic release at the same time, and when the detection control circuit obtains leakage current, the electronic switch is conducted, and the current flows into the electromagnetic release through the electronic switch to generate electromagnetic force to execute release action;
and a voltage division resistor is connected in series with the path of the commercial power.
The further setting is that: the resistance value of the divider resistor is between 200K and 2M ohm.
The further setting is that: and a diode for voltage reduction is also connected in series on the path of the commercial power.
The further setting is that: the type of the diode is 1N 4007.
The beneficial effects of the utility model reside in that:
1. the utility model discloses replace the electron release among the current electric leakage circuit breaker into the electromagnetism release, and do not use the silicon controlled rectifier as the switch, but use electronic switch to make whole circuit need not to adopt power supply circuit also normally to work, simplified electronic component quantity and wiring overall arrangement, in order to reach reduce cost and improve production efficiency's advantage.
2. The thyristor used in the existing circuit breaker has the characteristic of always conducting once conducting unless the voltage between the anode and the cathode is reduced, so that most of the leakage circuit breakers in the market cannot be reversely wired in and out, and if the circuit breaker is reversely wired, after the circuit breaker is tripped, the circuit can continue to supply power, the circuit breaker can be burnt out due to continuous power supply, and even a fire disaster is generated. The event can not the reverse connection in current electric leakage circuit breaker, and the utility model discloses in replace into electronic switch with the silicon controlled rectifier, can effectually avoid above-mentioned condition, even the reverse connection just can also normally work under the continuous electric leakage current, the wiring is convenient and safe more.
3. The utility model discloses in not using piezo-resistor, but adopting the divider resistance of high resistance value to realize the step-down, carrying out follow-up power supply after through the step-down, so can improve the security of this circuit breaker on the basis that improves impulse voltage resistance ability.
4. The utility model adopts the electromagnetic release to match with the electronic switch, the power of the electromagnetic release is very high, the full magnetic work can be realized, and the working current of the circuit is very small and is far less than 0.5 mA; so that the whole residual current circuit breaker is under the working condition of low power and works more safely.
5. The voltage reduction is realized by arranging the diode in the utility model.
Drawings
Fig. 1 is a circuit diagram of an embodiment.
In the figure: 1. a zero sequence transformer; 2. a detection control circuit; 3. an electronic switch; 4. an electromagnetic release; 5. a mechanical mechanism; 6. a voltage dividing resistor; 7. and a diode.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to the attached drawing 1, a novel residual current circuit breaker comprises a zero sequence transformer 1 which is powered by mains supply and is used for detecting the residual current of the circuit breaker, a detection control circuit 2 which is powered by mains supply and is connected with the zero sequence transformer 1 to obtain the residual current detected by the zero sequence transformer, a tripping device which is connected with the detection control circuit 2 and executes tripping action when the tripping device obtains the residual current, and a mechanical mechanism 5 which is connected with the tripping device to perform tripping. The detection control circuit 2 and the mechanical mechanism 5 in the above-described structure are conventional in the art and may be a knowledge that a person skilled in the art of circuit breakers should grasp.
The tripping device adopts an electromagnetic tripping device 4; the electronic switch 3 is connected with the detection control circuit 2, the electronic switch 3 is connected to the electromagnetic trip 4, when the detection control circuit 2 obtains leakage current, the electronic switch 3 is conducted, and the current flows into the electromagnetic trip 4 through the electronic switch 3 to generate electromagnetic force to execute tripping action. The utility model discloses in, electronic switch 3 adopts miniwatt silicon controlled rectifier, electronic circuit to constitute electronic switch, relay, opto-coupler etc. all can.
The high-resistance divider resistor 6 is connected in series with the passage of the commercial power, and the resistance of the divider resistor 6 is between 200K and 2M ohm. The voltage dividing resistor 6 is preferably a resistor having a large package size.
A diode 7 for voltage reduction is also connected in series on the path of the commercial power, and the model of the diode 7 is 1N 4007. The diode 7 has advantages of unidirectional conductivity and high withstand voltage.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (4)
1. A novel residual current circuit breaker comprises a zero sequence transformer (1) which is powered by mains supply and is used for detecting the residual current of the circuit breaker, a detection control circuit (2) which is powered by mains supply and is connected with the zero sequence transformer (1) to obtain the residual current detected by the zero sequence transformer, a tripping device which is connected with the detection control circuit (2) and executes tripping action when the detection control circuit obtains the residual current, and a mechanical mechanism (5) which is connected with the tripping device to perform tripping; the method is characterized in that:
the tripping device adopts an electromagnetic tripping device (4);
the electromagnetic tripping device is characterized by further comprising an electronic switch (3) connected with the detection control circuit (2), wherein the electronic switch (3) is simultaneously connected to the electromagnetic tripping device (4), and when the detection control circuit (2) obtains leakage current, the electronic switch (3) is conducted, and the current flows into the electromagnetic tripping device (4) through the electronic switch (3) to generate electromagnetic force to execute tripping action;
and a high-resistance voltage dividing resistor (6) is connected in series with a path of the mains supply.
2. A novel residual current circuit breaker according to claim 1, characterized in that: the resistance value of the divider resistor (6) is between 200K and 2M ohm.
3. A novel residual current circuit breaker according to claim 1, characterized in that: and a diode (7) for voltage reduction is also connected in series on the path of the commercial power.
4. A novel residual current circuit breaker according to claim 3, characterized in that: the type of the diode (7) is 1N 4007.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020940692.9U CN212063475U (en) | 2020-05-28 | 2020-05-28 | Novel residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020940692.9U CN212063475U (en) | 2020-05-28 | 2020-05-28 | Novel residual current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212063475U true CN212063475U (en) | 2020-12-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020940692.9U Active CN212063475U (en) | 2020-05-28 | 2020-05-28 | Novel residual current circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212063475U (en) |
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2020
- 2020-05-28 CN CN202020940692.9U patent/CN212063475U/en active Active
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