CN201904515U - Power socket with leakage current measuring protective device - Google Patents
Power socket with leakage current measuring protective device Download PDFInfo
- Publication number
- CN201904515U CN201904515U CN2010206429554U CN201020642955U CN201904515U CN 201904515 U CN201904515 U CN 201904515U CN 2010206429554 U CN2010206429554 U CN 2010206429554U CN 201020642955 U CN201020642955 U CN 201020642955U CN 201904515 U CN201904515 U CN 201904515U
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- leakage current
- protective device
- circuit
- serial communication
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Abstract
The utility model discloses a power socket with a leakage current measuring protective device. The leakage current measuring protective device comprises an A (alternating)/D (direct) converter, a CPU (central processing unit) computing unit, a serial communication controlling module and a serial communication network which are connected sequentially and a mutual inductor. An input end and an output end of the mutual inductor are respectively connected with equipment to be detected and the A/D converter, and an input end and an output end of an alarm unit are respectively connected with an output end of the CPU computing unit and an input end of a circuit controlling unit. The power socket with the leakage current measuring protective device is convenient in installation and small in size. The alarm unit alarms and the circuit controlling unit is disconnected with the equipment to be detected if leakage current exceeds alarm threshold, and the circuit controlling unit resets to be connected with the equipment to be detected when the leakage current is lower than the alarm threshold, so that the power socket is fine in protective effect on the equipment to be detected. Since the leakage current measuring protective device comprises the serial communication controlling module and the serial communicate network, and function of communicating can be realized.
Description
Technical field
The utility model belongs to the power technology field, relates to a kind of supply socket of measuring protective device with leakage current particularly.
Background technology
All there is leakage current to some extent in various household electric appliances; and ordinary wall socket does not have the detection defencive function of leakage current, if this electric current is excessive, will cause electric energy loss and device damage; cause fire when serious, cause personnel and property to come to harm.Take place for fear of this situation, the form that people adopt instrument transformer (electric leakage instrument transformer) to add complicated checkout equipment is usually measured supply line in the building, and trouble is installed like this, and the volume of device is excessive, and the protection effect is undesirable.
The utility model content
Technology of the present utility model is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of easy for installation, volume is little, protection is effective, have the supply socket that the band leakage current of communication function is measured protective device.
Technical solution of the present utility model is: this band leakage current is measured the supply socket of protective device; its leakage current is measured protective device and is comprised instrument transformer and the A/D converter, CPU arithmetic element, serial communication control module, the serial communication network that connect successively; the input of instrument transformer, output connect Devices to test, A/D converter respectively, and the input of alarm unit is connected the output of CPU arithmetic element and the input of line control unit respectively with output.
Because itself having leakage current, this supply socket measures protective device, so easy for installation, volume is little.This supply socket obtains the leakage current of Devices to test by instrument transformer; convert to then digital quantity and with alarm threshold value relatively; if leakage current surpasses alarm threshold value; alarm unit is just reported to the police and line control unit cuts off and being connected of Devices to test; when leakage current during less than alarm threshold value line control unit reset again and being connected of Devices to test, so effective to the protection of Devices to test.Because this device comprises serial communication control module, serial communication network, so can realize communication function.
Description of drawings
Fig. 1 is the circuit theory diagrams that leakage current of the present utility model is measured protective device.
Embodiment
Below the technical solution of the utility model is described in further detail.
Fig. 1 is the circuit theory diagrams that leakage current of the present utility model is measured protective device.This band leakage current is measured the supply socket of protective device; its leakage current is measured protective device and is comprised instrument transformer 1 and the A/D converter 5, CPU arithmetic element 6, serial communication control module 7, the serial communication network 8 that connect successively; the input 11 of instrument transformer 1, output 12 connect Devices to test (not shown in figure 1), A/D converter 5 respectively, and the input of alarm unit 9 is connected the output of CPU arithmetic element 6 and the input of line control unit 10 respectively with output.This supply socket obtains the leakage current of Devices to test by instrument transformer, convert to then digital quantity and with alarm threshold value relatively, if leakage current surpasses alarm threshold value, serial communication control module 7 sends comparative result to testing staff by serial communication network 8.
Preferably, in order to prevent this device of the excessive damage of leakage current, also comprise the amplitude limiter circuit 3, the amplifying circuit 4 that are electrically connected successively, the output of the input termination instrument transformer 1 of amplitude limiter circuit 3.
Preferably, alarm unit 9 comprises filter circuit and optical alarm circuit.Optical alarm circuit comprises red, yellow, green three indicator lights, wherein red light is represented to report to the police, and amber light is represented communication fault, and green light is represented normally.
Preferably, line control unit 10 comprises cut off the electricity supply circuit and reset circuit.
Preferably, the model of CPU arithmetic element is A96F902SO18.
Operation principle of the present utility model is: at first, in order to know certainty of measurement of the present utility model, the input 11 of instrument transformer 1 is connect simulation experiment circuit, promptly import the known magnitude of current, and the output 12 of instrument transformer 1 inserts amplitude limiter circuits 3, and the magnitude of current that will be by this device acquisition and the known magnitude of current compare learns certainty of measurement of the present utility model; Then, input 11 reception of instrument transformer 1 are surveyed the circuit of electric equipment, and the output 12 of instrument transformer 1 inserts amplitude limiter circuit 3, the leakage current of electric equipment to be measured so just passes through amplitude limiter circuit 3 successively, amplifying circuit 4, obtain digital signal behind the A/D converter, carry out filtering then, alarm threshold value relatively, if leakage current surpasses setting threshold, serial communication control module 7 sends comparative result to testing staff by serial communication network 8, and report to the police by warning circuit light, cut off the electricity supply by line control unit then, do not surpass threshold value then reset circuit if check leakage current once more.
The utility model can be widely used in the measurement of the leakage current amount of various electric equipments, is particularly useful for fire-fighting domain.Because itself having leakage current, this supply socket measures protective device, so easy for installation, volume is little.This supply socket obtains the leakage current of Devices to test by instrument transformer; convert to then digital quantity and with alarm threshold value relatively; if leakage current surpasses alarm threshold value; alarm unit is just reported to the police and line control unit cuts off and being connected of Devices to test; when leakage current during less than alarm threshold value line control unit reset again and being connected of Devices to test, so effective to the protection of Devices to test.Because this device comprises serial communication control module, serial communication network, so can realize communication function.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; every foundation technical spirit of the present utility model all still belongs to the protection range of technical solutions of the utility model to any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1. the supply socket of band leakage current measurement protective device; it is characterized in that: leakage current is measured protective device and is comprised instrument transformer (1) and the A/D converter (5), CPU arithmetic element (6), serial communication control module (7), the serial communication network (8) that connect successively; the input (11) of instrument transformer (1), output (12) connect Devices to test, A/D converter (5) respectively, and the input of alarm unit (9) is connected the output of CPU arithmetic element (6) and the input of line control unit (10) respectively with output.
2. band leakage current according to claim 1 is measured the supply socket of protective device, it is characterized in that: also be provided with amplitude limiter circuit (3), amplifying circuit (4) successively between the output (12) of instrument transformer (1) and A/D converter (5).
3. band leakage current according to claim 2 is measured the supply socket of protective device, and it is characterized in that: alarm unit (9) comprises filter circuit and optical alarm circuit.
4. band leakage current according to claim 3 is measured the supply socket of protective device, and it is characterized in that: line control unit (10) comprises cut off the electricity supply circuit and reset circuit.
5. band leakage current according to claim 4 is measured the supply socket of protective device, and it is characterized in that: the model of CPU arithmetic element is A96F902SO18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206429554U CN201904515U (en) | 2010-12-02 | 2010-12-02 | Power socket with leakage current measuring protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206429554U CN201904515U (en) | 2010-12-02 | 2010-12-02 | Power socket with leakage current measuring protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201904515U true CN201904515U (en) | 2011-07-20 |
Family
ID=44275108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206429554U Expired - Fee Related CN201904515U (en) | 2010-12-02 | 2010-12-02 | Power socket with leakage current measuring protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201904515U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989721A (en) * | 2010-12-02 | 2011-03-23 | 饶学进 | Power socket with leakage current measurement protector |
-
2010
- 2010-12-02 CN CN2010206429554U patent/CN201904515U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989721A (en) * | 2010-12-02 | 2011-03-23 | 饶学进 | Power socket with leakage current measurement protector |
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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: 20110720 Termination date: 20121202 |