CN201222644Y - Leakage current motion protector with temperature control - Google Patents
Leakage current motion protector with temperature control Download PDFInfo
- Publication number
- CN201222644Y CN201222644Y CNU2008201203501U CN200820120350U CN201222644Y CN 201222644 Y CN201222644 Y CN 201222644Y CN U2008201203501 U CNU2008201203501 U CN U2008201203501U CN 200820120350 U CN200820120350 U CN 200820120350U CN 201222644 Y CN201222644 Y CN 201222644Y
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- diode
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- silicon scr
- rectifier
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Abstract
The utility model relates to a leakage current action protector with the temperature control function, which comprises a zero-sequence current transformer, a tripping coil, an amplifier, a rectifier and a leakage protector which is formed from testing loops, wherein one end of a resistance R3, which is connected with a thermal resistance R in series, is connected with the power supply of a leakage amplifying circuit IC, the other end of the resistance R3 or the end of the resistance R3, which is connected with the thermal resistance R in series, is connected with a resistance R4, one end and the anode of a diode D6, the other ends of the resistance R4 and a capacity C5 are connected with the cathode of the rectifier DC, the other end of the capacity C4 and the cathode of the diode D6 are connected with the triggering electrode of a controlled silicon SCR in a leakage protecting circuit, a capacity C2 is connected with a diode D5 in parallel, and the anode of the diode D5 is connected with the anode of the amplifying circuit, the cathode of the diode D5 is connected with the triggering electrode of the controlled silicon SCR, and a capacity C3 is connected between the triggering electrode of the controlled silicon SCR and the cathode of the rectifier DC. The utility model has the advantages of good safety, reasonable structure and low cost.
Description
Technical field
The utility model relates to a kind of electric security protector device, particularly relates to a kind of temperature controlled residual current operated protective device of being with.
Background technology
The residual current operated protective device of existing band temperature control utilizes original residual current operated protective device circuit; residual current operated protective device as a kind of belt sensor; comprise the earth leakage protective device of forming by zero-sequence transformer L L H, circuit breaker Z K, amplifier, test loop; be installed in and be connected on the current supply circuit after test loop at least one transducer and the zero-sequence transformer on electrical equipment or the equipment and resistance are connected in series, and in specification, disclose the test button two ends that the two ends that are installed in the transducer in the plug are connected in parallel on leakage protecting plug.Though this residual current operated protective device can open circuit when the plug overtemperature; start the leakage protecting plug action; cut off working power; prevent accident; but can only under former leakage protection circuit zero-sequence transformer, the normal situation of amplifier, could realize; in case zero-sequence transformer, amplifier in the former leakage protection circuit are undesired, just can not realize overtemperature prote.The leakage plug that also has other band overtemperature prote; form by plug and leakage protection circuit; it is by instrument transformer; tripping coil; the controllable silicon impact-absorbing element; leakage protection circuit is formed; the temperature control protection electric circuit is set in leakage protection circuit; the temperature control protection electric circuit still utilizes the zero-sequence transformer of former leakage protection circuit; the amplifier original paper; still can not overcome the zero-sequence transformer in the former leakage protection circuit; amplifier is undesired; just can not realize the shortcoming of overtemperature prote, and the cost of the residual current operated protective device of existing band temperature control is also higher.
Summary of the invention
Technical problem to be solved in the utility model is that the leakage current actuator that is to overcome present band overtemperture control can only be utilized the original paper of original residual current operated protective device and the not high shortcoming of reliability; and provide a kind of residual current operated protective device, and save cost with the independent temperature circuit.
The utility model solves the problems of the technologies described above the technical scheme that is adopted:
A kind of residual current operated protective device with temperature control, comprise by zero sequence current mutual inductor, tripping coil, the earth leakage protective device that amplifier, rectifier, test loop are formed is characterized in that: the end after resistance R 3 and the thermistor R series connection is connected with the power supply of the amplifying circuit IC that leaks electricity; The other end after resistance R 3 or resistance R 3 and the thermistor R series connection is connected with the end of resistance R 4, capacitor C 4, C5 and the positive pole of diode D6; The other end of resistance R 4, capacitor C 5 is connected with the negative pole of rectifier DC; The negative pole of the other end of capacitor C 4 and diode D6 is connected the trigger electrode of controllable silicon SCR in the leakage protection circuit; Increase capacitor C 2, diode D5 between the output of earth leakage protective device amplifying circuit IC and the controllable silicon SCR trigger electrode, capacitor C 2 and two utmost point D5 parallel connections, the positive pole of back diode D5 in parallel is connected with the positive pole of amplifying circuit IC; The negative pole of diode D5 is connected with the trigger electrode of controllable silicon SCR, is connected capacitor C 3 between the negative pole of the trigger electrode of controllable silicon SCR and rectifier DC.
Compared with prior art, advantage of the present utility model is:
1, improved the overtemperture control method, by the temperature-control circuit that adds, make it more reliable and secure, prevent to damage plug, socket because of plug, socket high temperature, cause and open circuit or fire, thereby avoid generation breaking-up electrical equipment or plug, socket high temperature to burn out the preceding charged human casualty accident that causes of earth connection, guarantee electrical equipment, user and environmentAL safety.
2, whole residual current operated protective device is simple in structure, and cost is low.
Description of drawings
Fig. 1 is the circuit diagram of the utility model embodiment.
Fig. 2 is the circuit diagram of another embodiment of the utility model.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, existing earth leakage protective device is made up of the test loop of tripping coil ZR, zero instrument transformer LLH, IC amplifier, rectifier D1-D4, strip resistance R2 and switch SW, the utility model increases earth leakage protective device self overtemperture control circuit on original leakage current protection device, the end after resistance R 3 and the thermistor R series connection is connected with the power supply (tie point of resistance R 1, electrochemical capacitor C1 positive pole and IC power supply) of electric leakage amplifying circuit IC; The other end after resistance R 3 and the thermistor R series connection is connected with the end of resistance R 4, capacitor C 4, C5 and the positive pole of diode D6; The other end of resistance R 4, capacitor C 5 is connected with the negative pole of rectifier DC; The negative pole of the other end of capacitor C 4 and diode D6 is connected the trigger electrode of controllable silicon SCR in the leakage protection circuit; Increase capacitor C 2, diode D5 between the output of earth leakage protective device amplifying circuit IC and the controllable silicon SCR trigger electrode, capacitor C 2 and two utmost point D5 parallel connections, the positive pole of back diode D5 in parallel is connected with the positive pole of amplifying circuit IC; The negative pole of diode D5 is connected with the trigger electrode of controllable silicon SCR, is connected capacitor C 3 between the negative pole of the trigger electrode of controllable silicon SCR and rectifier DC.
Above-mentioned thermistor R is installed between the pin of the interior live wire L of leakage protecting plug and the zero line N utmost point.
When the bearing power of leakage protecting plug is very big; if the live wire L pin of leakage protecting plug or the live wire L utmost point or the loose contact of the zero line N utmost point of zero line N pin and supply socket; the live wire L utmost point or zero line N utmost point meeting this moment is generated heat rapidly and is caused temperature sharply to raise; the thermistor R temperature that is installed between the pin of live wire L and the zero line N utmost point in the leakage protecting plug also increases; the resistance value of thermistor R is diminished (thermistor is a negative temperature coefficient) rapidly; the supply voltage of amplifier IC also diminishes along with the resistance value of thermistor R and raises through the voltage after partial of resistance R 3 and thermistor R and resistance R 4; voltage after partial arrives the trigger electrode of controllable silicon SCR through diode D6; when the voltage of controllable silicon SCR trigger electrode is increased to its trigger voltage value; the controllable silicon SCR conducting that is triggered; earth leakage protective device tripping operation outage, thus the pin that guarantees earth leakage protective device is can Yin Wendu not too high and damage.
The effect of above-mentioned diode D5, D6 is to control between the output voltage of the output voltage of earth leakage protective device integrated circuit (IC) and overtemperature prote circuit not fall to fail mutually, thereby avoids influencing trigger voltage; The effect of capacitor C 2, C3, C4, C5 is to improve the product antijamming capability, and the stability of product is effectively ensured.
If actual conditions change, temperature-sensitive element R inserts the position changeableization of diode D6, as shown in Figure 2.
Claims (1)
1, the residual current operated protective device of band temperature control, comprise by zero sequence current mutual inductor, tripping coil, the earth leakage protective device that amplifier, rectifier, test loop are formed is characterized in that: the end after resistance R 3 and the thermistor R series connection is connected with the power supply of the amplifying circuit IC that leaks electricity; The other end after resistance R 3 or resistance R 3 and the thermistor R series connection is connected with the end of resistance R 4, capacitor C 4, C5 and the positive pole of diode D6; The other end of resistance R 4, capacitor C 5 is connected with the negative pole of rectifier DC; The negative pole of the other end of capacitor C 4 and diode D6 is connected the trigger electrode of controllable silicon SCR in the leakage protection circuit; Increase capacitor C 2, diode D5 between the output of earth leakage protective device amplifying circuit IC and the controllable silicon SCR trigger electrode, capacitor C 2 and two utmost point D5 parallel connections, the positive pole of back diode D5 in parallel is connected with the positive pole of amplifying circuit IC; The negative pole of diode D5 is connected with the trigger electrode of controllable silicon SCR, is connected capacitor C 3 between the negative pole of the trigger electrode of controllable silicon SCR and rectifier DC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201203501U CN201222644Y (en) | 2008-06-25 | 2008-06-25 | Leakage current motion protector with temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201203501U CN201222644Y (en) | 2008-06-25 | 2008-06-25 | Leakage current motion protector with temperature control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201222644Y true CN201222644Y (en) | 2009-04-15 |
Family
ID=40576146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201203501U Expired - Lifetime CN201222644Y (en) | 2008-06-25 | 2008-06-25 | Leakage current motion protector with temperature control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201222644Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449635A (en) * | 2014-05-28 | 2016-03-30 | 益而益(集团)有限公司 | Electric leakage protector with overtemperature protection device |
-
2008
- 2008-06-25 CN CNU2008201203501U patent/CN201222644Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449635A (en) * | 2014-05-28 | 2016-03-30 | 益而益(集团)有限公司 | Electric leakage protector with overtemperature protection device |
| CN105449635B (en) * | 2014-05-28 | 2018-12-28 | 益而益(集团)有限公司 | Earth leakage protective device with over-temperature protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yuyao Jiarong Electronic Appliance Co., Ltd. Assignor: Qian Jiacan Contract record no.: 2011330000342 Denomination of utility model: Leakage current motion protector with temperature control Granted publication date: 20090415 License type: Exclusive License Record date: 20110425 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090415 |
|
| CX01 | Expiry of patent term |