CN2543258Y - Leakage current actuating protector with temp. control - Google Patents
Leakage current actuating protector with temp. control Download PDFInfo
- Publication number
- CN2543258Y CN2543258Y CN 02216111 CN02216111U CN2543258Y CN 2543258 Y CN2543258 Y CN 2543258Y CN 02216111 CN02216111 CN 02216111 CN 02216111 U CN02216111 U CN 02216111U CN 2543258 Y CN2543258 Y CN 2543258Y
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- controllable silicon
- parallel
- protective device
- amplifier
- rectifier
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Abstract
The utility model relates to a leakage current actuating protector with temperature control. The utility model comprises a leakage protector consisting of a zero current transformer (ZCT), a release ZK, an IC amplifier, a rectifier DC and a test T circuit, a dynatron base in an overtemperature control circuit is connected with a resistor in series and is connected with a collector in parallel to be connected with a power supply positive pole of the amplifier, the dynatron base is connected with a thermo-sensitive element in serial and then is connected with an emitter in parallel connected with a resistor in series to be connected with a power supply negative pole of the amplifier, a capacitor is connected in parallel between the base and the emitter, a cathode of a controllable silicon SCR is connected with a negative pole of the rectifier DC, an anode is connected with a positive pole of the rectifier DC, a trigger electrode of the controllable silicon SCR is connected with a dynatron emitter, and a dielectric capacitor C is connected in parallel between the negatives of the controllable silicon SCR and the dynatron. The utility model has the advantages that the utility model has an improved overtemperature control method, has more safety and reliability by an external temperature control circuit, prevents the circuit break or fire accidents caused by the damage of plugs and sockets due to the high temperature of plugs and sockets, and ensures the safety of electrical appliances, users and environment.
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 Chinese patent 95214539 disclosed a kind of belt sensors; comprise by zero-sequence transformer LLH; circuit breaker ZK; amplifier; the earth leakage protective device that the test loop is formed; 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 of Chinese patent 002480011 disclosed 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 zero-sequence transformer, the amplifier original paper of former leakage protection circuit, still can not overcome zero-sequence transformer, amplifier in the former leakage protection circuit undesired, just can not realize the shortcoming of overtemperature prote.
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 a kind of residual current operated protective device with the independent temperature circuit is provided.
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 instrument transformer ZCT; release ZK; the IC amplifier; rectifier DC; the earth leakage protective device that test T forms in the loop; it is characterized in that the transistor base series resistance amplifier power supply positive pole of linking in parallel in the overtemperture control circuit with collector electrode; behind the transistor base series thermal-sensitive element with the emitter series resistance after the amplifier power supply negative pole of linking in parallel; go back shunt capacitance between base stage and emitter; the controllable silicon SCR negative electrode connects the negative pole of rectifier DC; anode connects the positive pole of rectifier DC; the trigger electrode of controllable silicon SCR links to each other with transistor emitter, and with its negative electrode between a dielectric capacitance C in parallel.Because the temperature-sensitive element and the resistance that connect on the transistor base its essence is the voltage that is used to control between base stage, emitter and collector, so the temperature-sensitive character of temperature-sensitive element is when changing, and the position of temperature-sensitive element and resistance is commutative.
The residual current operated protective device of aforesaid band temperature control; also comprise the sensor circuit that links to each other with controllable silicon SCR; one of at least one transducer is terminated at any utmost point in the current supply circuit, and the other end of transducer is connected respectively and inserted the controllable silicon SCR trigger electrode after the resistance R.Transducer can be bimetal leaf hydraulic pressure switch, liquid switch, thermistor or smoke alarm, as long as transducer or alarm that its resistance can be suddenlyd change under non-normal working all can use.
The residual current operated protective device of aforesaid band temperature control, the temperature control plug separates with residual current operated protective device, is with temperature-sensitive element in the plug, and temperature-sensitive element lead-in wire and power line all have the sleeve pipe of heatproof.The overtemperature at plug place can not influence the residual current operated protective device element like this, can prolong the life-span of residual current operated protective device.
Compared with prior art, advantage of the present utility model is to have 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 take place damaging electrical equipment or plug, socket high temperature burns out the preceding charged human casualty accident that causes of earth connection, guarantees electrical equipment, user and environmentAL safety.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model;
Fig. 2 is the circuit diagram of the utility model embodiment;
Fig. 3 is the structural representation of the utility model embodiment.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Existing earth leakage protective device is made up of circuit breaker ZK, zero instrument transformer ZCT, IC amplifier, rectifier DC, the test T loop of band reset switch; as shown in Figure 1; the utility model increases self overtemperture control circuit 1 and electrical equipment overheat controller 2 on original leakage current protection device, the triode SG base series resistor R in self overtemperture control circuit 1
1The IC amplifier power supply positive pole of linking in parallel with collector electrode, triode SG base stage series thermal-sensitive element R
2Back and emitter series resistance R
3IC amplifier negative pole is linked in back parallel connection, shunt capacitance C between base stage and emitter
1, the controllable silicon SCR negative electrode connects the negative pole of rectifier DC, anode connects the positive pole of rectifier DC, the trigger electrode of controllable silicon SCR links to each other with triode SG emitter, and with its negative electrode between a dielectric capacitance C in parallel
2, the overheat controller 2 of electrical equipment is any utmost point that is terminated in the current supply circuit of transducer 3, resistance R of other end series connection of transducer 3
4The controllable silicon SCR trigger electrode is inserted in the back.The overheat controller 2 of electrical equipment has utilized original controllable silicon SCR circuit.If temperature-sensitive element R
2Temperature-sensitive character when changing, temperature-sensitive element R
2With resistance R
1Commutative position is as Fig. 2.
As shown in Figure 3, temperature control plug 4 can separate with residual current operated protective device 7, band temperature-sensitive element 5 in the plug 4, and temperature-sensitive element 5 lead-in wires and power line all have the sleeve pipe 6 of heatproof.The overtemperature at plug 4 places can not influence the residual current operated protective device element like this, can prolong the life-span of residual current operated protective device.
Claims (3)
1; a kind of residual current operated protective device with temperature control; comprise by zero instrument transformer LLH; circuit breaker ZK; amplifier; rectifier DC; the earth leakage protective device that the test loop is formed; it is characterized in that: the amplifier power supply output of linking in parallel of the triode series resistance in the overtemperture control circuit with collector electrode; behind the transistor base series thermal-sensitive resistance with the emitter series resistance after the amplifier out of linking in parallel; go back shunt capacitance between base stage and emitter; the controllable silicon SCR negative electrode connects the negative pole of rectifier DC; anode connects the positive pole of rectifier DC; the trigger electrode of controllable silicon SCR links to each other with transistor emitter, and with its negative electrode between a dielectric capacitance C in parallel.
2, the residual current operated protective device of band temperature control as claimed in claim 1; it is characterized in that: also comprise the sensor circuit that links to each other with controllable silicon SCR; one of at least one transducer is terminated at any utmost point in the current supply circuit, and the other end of transducer is connected respectively and inserted the controllable silicon SCR trigger electrode behind the resistance.
3, the residual current operated protective device of band temperature control as claimed in claim 1 or 2 is characterized in that: the temperature control plug separates with residual current operated protective device, is with temperature-sensitive element in the plug, and temperature-sensitive element lead-in wire and power line all have the sleeve pipe of heatproof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216111 CN2543258Y (en) | 2002-03-12 | 2002-03-12 | Leakage current actuating protector with temp. control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02216111 CN2543258Y (en) | 2002-03-12 | 2002-03-12 | Leakage current actuating protector with temp. control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2543258Y true CN2543258Y (en) | 2003-04-02 |
Family
ID=33695150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02216111 Expired - Fee Related CN2543258Y (en) | 2002-03-12 | 2002-03-12 | Leakage current actuating protector with temp. control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2543258Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386934C (en) * | 2004-10-25 | 2008-05-07 | 广东珠江开关有限公司 | Intelligent leakage releaser |
-
2002
- 2002-03-12 CN CN 02216111 patent/CN2543258Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386934C (en) * | 2004-10-25 | 2008-05-07 | 广东珠江开关有限公司 | Intelligent leakage releaser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030402 Termination date: 20110312 |