CN209231444U - External leakage-current alarm module - Google Patents
External leakage-current alarm module Download PDFInfo
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- CN209231444U CN209231444U CN201821867517.0U CN201821867517U CN209231444U CN 209231444 U CN209231444 U CN 209231444U CN 201821867517 U CN201821867517 U CN 201821867517U CN 209231444 U CN209231444 U CN 209231444U
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Abstract
The utility model discloses a kind of external leakage-current alarm modules, including insulation crust, control circuit board and connecting terminal, zero sequence transformer is equipped with outside insulation crust, control circuit board is equipped with main control chip, main power circuit, circuit is arranged in delay setting circuit and leakage current, connecting terminal is connect with main power circuit, main power circuit is connected by the first regulator rectifier circuit with the power pins of main control chip, there is the sample circuit being connected with the sampling pin of main control chip on control circuit board, sample circuit is connected with zero sequence transformer, main control chip passes through photoelectric coupled circuit, first ghyristor circuit is connected with relay, relay is connected with external alarm interface, first ghyristor circuit is also connected with leakage current indicator light, delay setting circuit and leakage current setting circuit are electrically connected with main control chip.Leakage-current alarm module in the utility model is designed using outlet structure, structurally reasonable, using stabilization, has good using effect.
Description
Technical field
The utility model belongs to electric leakage protection technology field, and in particular to a kind of external leakage-current alarm module.
Background technique
Earth leakage protective device (or leakage switch) is indispensable protective device in electrical equipment, is primarily used in electricity
It plays a protective role when leak current fault occurring for gas equipment and to the person electric shock for having fatal risk.Existing earth leakage protective device
The mostly built-in control circuit board that leaks electricity, and external alarm, are connect with external alarm by control circuit board, realize electric leakage
Warning function, because earth leakage protective device inner space is smaller, after electric leakage control panel is mounted on earth leakage protective device inside, inner space
Very compact complexity, and earth leakage protective device internal temperature raising when working, after component is influenced by high temperature on control circuit board
Performance is unstable, and then influences the stability in use and service life of entire earth leakage protective device.
Summary of the invention
The purpose of the utility model is to provide a kind of structurally reasonable external leakage-current alarm modules.
Realizing the technical solution of the utility model aim is:
A kind of external leakage-current alarm module, including insulation crust, the control circuit board being arranged in the insulation crust
With the connecting terminal being connected on insulation crust with the control circuit board is set, outside the insulation crust be equipped with zero sequence
Mutual inductor, the control circuit board are equipped with main control chip, main power circuit, delay setting circuit and leakage current setting electricity
Road, the connecting terminal are connect with the main power circuit, the main power circuit by the first regulator rectifier circuit with it is described
The power pins of main control chip are connected, and have on the control circuit board and are connected with the sampling pin of the main control chip
Sample circuit, the sample circuit are connected with the zero sequence transformer, and the main control chip passes through photoelectric coupled circuit, first controllably
Silicon circuit is connected with relay, and the relay is connected with external alarm interface, and first ghyristor circuit also connects
Leakage current indicator light is connect, the delay setting circuit and leakage current setting circuit are electrically connected with the main control chip.
Further, further include the second ghyristor circuit being connected with the main control chip and with the described second silicon-controlled electricity
The tripping driving circuit that road is connected；
It further include auxiliary power circuit, the second voltage regulator circuit being connected with the auxiliary power circuit and described second
The touch-switch that voltage regulator circuit is connected, the touch-switch are connected with the power end of the relay.
Further, delay setting circuit include three gear regulating switches, first capacitor, the second capacitor, third capacitor and
First resistor, the first capacitor and three gear one contact series of regulating switches, the second capacitor keep off the of regulating switches with three
Two contact series, one end of the first resistor are connected to the other end on the tie point of first capacitor and the second capacitor and are grounded,
The third contact of three gear regulating switches passes through third capacitance connection on the tie point of a capacitor and the second capacitor and three gears are adjusted
The third contact of section switch is connected with the delay pin of main control chip.
Further, the leakage current setting circuit includes three gear regulating switches, first resistor, second resistance and third electricity
Resistance, three pins of the three gears regulating switch are connected to master control after connecting respectively with first resistor, second resistance, 3rd resistor
On the reference voltage pin of chip.
Further, model SN54133, M54133 of the main control chip or LW54133 chip.
The utility model has the effect of positive: the utility model it is structurally reasonable, using the external side of control circuit board
Control panel is not mounted on inside earth leakage protective device by formula, the leakage-current alarm module is mounted in earth leakage protective device side when installation,
So that earth leakage protective device interior layout is more succinct reasonable, the cumbersome behaviour of installation control circuit board inside earth leakage protective device is eliminated
Make, and avoid interference effect of the control circuit board by earth leakage protective device internal high temperature, improves control circuit board and power on
The service life of sub- component is conducive to the stability in use and service life that improve complete machine, which can be
Alarm signal is issued when leaking electricity, in order to which user knows in time.
Detailed description of the invention
In order to be more likely to be clearly understood the content of the utility model, below according to specific embodiment and combine attached
Figure, is described in further detail the utility model, in which:
Fig. 1 is the structural block diagram of the utility model；
Fig. 2 is the physical circuit figure of the utility model.
Specific embodiment
1 and Fig. 2 is illustrated the specific structure in the utility model with reference to the accompanying drawings of the specification:
A kind of external leakage-current alarm module, including insulation crust, the control circuit board being arranged in the insulation crust
With the connecting terminal being connected on insulation crust with the control circuit board is set, outside the insulation crust be equipped with zero sequence
Mutual inductor 1, the control circuit board are equipped with main control chip 2, main power circuit 3, delay setting circuit 10 and leakage current and set
Circuits 11, the connecting terminal are connect with the main power circuit 3, and the main power circuit 3 connects the negative of earth leakage protective device
End is carried, the main power circuit 3 is connected by the first regulator rectifier circuit 4 with the power pins of the main control chip 2, described
There is the sample circuit 5 being connected with the sampling pin of the main control chip 2, the sample circuit 5 and institute on control circuit board
It states zero sequence transformer 1 to be connected, the main control chip 2 is connected by photoelectric coupled circuit 6, the first ghyristor circuit 7 with relay 8
It connects, the relay 8 is connected with external alarm interface, and first ghyristor circuit 7 is also connected with leakage current indicator light
17, the delay setting circuit 10 and leakage current setting circuit 11 are electrically connected with the main control chip 2.Above-mentioned leakage-current alarm mould
When block is installed and used, it is assembled in earth leakage protective device side, and connecting terminal will be connected by conducting wire and connect with main power source, together
When the connection of external alarm interface warning device (such as buzzer siren) pass through zero sequence transformer pair during installing and using
It inputs main power source, that is, earth leakage protective device load end and carries out sample detecting, the leakage current that main control chip 2 calculates main circuit is big
It is small, then allow the leakage current in main power source to compare with preset leakage current value in main control chip 2, when leaking electricity in main power source
When electric current reaches the 70%~90% of presetting leakage current value, main control chip drives photoelectric coupled circuit, and rear-guard is connected in photoelectric coupled circuit
Dynamic first ghyristor circuit, is attracted relay, and then triggers external alarm, while leakage current indicator light is bright.It leaks electricity hidden
Suffer from after releasing, so that leakage current indicator light is in OFF state by touch-switch (product reset key).
It further include being connected with the main control chip 2 in the present embodiment as the further improvement of above-described embodiment
Second ghyristor circuit 12 and the tripping driving circuit 13 being connected with second ghyristor circuit, the tripping driving circuit
Connect the trip action mechanism in earth leakage protective device；It and further include auxiliary power circuit 14 and the auxiliary power circuit 14
The second voltage regulator circuit 15 being connected, the touch-switch 16 being connected with second voltage regulator circuit 15, the touch-switch with
The power end of the relay 8 is connected, and the auxiliary power circuit 14 connects the end of incoming cables of earth leakage protective device, and by main power source
Circuit and the second voltage regulator circuit disconnect.Make the leakage-current alarm module have alarm after foregoing circuit structure is added and protects electric leakage
The function of device tripping is protected, specific working mode is as follows: sample detecting, master control are carried out by 1 pair of input main power source of zero sequence transformer
Chip calculates the leakage current size of main circuit, and the leakage current and preset leakage current value then allowed in main power source is done pair
Than, when leakage current reaches 70%~90% of presetting leakage current value in control chip 2 in main power source, main control chip work
It is as follows to make state: a) main control chip 2 drives photoelectric coupled circuit 6, drives the first ghyristor circuit 7 after optocoupler conducting, makes in route
After relay 8 is attracted, conducting rectifies the control signal that the second voltage regulator circuit 15 comes through auxiliary power circuit, and then triggers external
Alarm, while leakage current indicator light is bright；B) main control chip 2 drives the second ghyristor circuit 12, to drive earth leakage protective
The trip action mechanism of device makes earth leakage protective device thread off, and reaches the function of shutdown main power source.
Further, in the present embodiment, the delay setting circuit 10 includes three gear regulating switch K1-B, first capacitor
C1-B, the second capacitor C2-B, third capacitor C3-B and first resistor R9-B, the first capacitor is with three gear regulating switch K1-B's
Second contact series of one contact series, the gear regulating switch of the second capacitor C2-B and three, the one of the first resistor R9-B
End is connected to the other end on the tie point of first capacitor and the second capacitor and is grounded, and the third contacts of three gear regulating switches pass through the
Three capacitor C3-B be connected on the tie point of first capacitor and the second capacitor C2-B and the third contact of three gear regulating switches and
The delay pin of main control chip 2 is connected, and 10 structure of circuit is arranged by using above-mentioned delay, in practical application, passes through three gears
Regulating switch K1-B adjusts the capacitance of patch capacitor on control circuit board, obtains simultaneously output drive signal by main control chip 2, from
And change the time of trip action delay, usually setting delay adjustable extent is 0.04ms-2s.
In the present embodiment, leakage current setting circuit 11 include three gear regulating switch K2-B, first resistor R10-B,
Second resistance R11-B and 3rd resistor R12-B, three pins of the three gears regulating switch respectively with first resistor R10-B, the
It is connected on the reference voltage pin of main control chip 2 after two resistance R11-B and 3rd resistor R12-B series connection.By using above-mentioned
11 structure of circuit is arranged in leakage current, is adjusted in practical applications by three gear regulating switch K2-B to presetting leakage current
Value, usual adjustable extent are set as 30-1000 milliamperes.
Three gear regulating switches described in the present embodiment can be three gear toggle switches, be also possible to three gear rotary switches.
The main control chip 2 in the present embodiment can be selected model SN54133, M54133 in the market or LW54133's
Chip, phase can be had by directly being bought after being connected after above-mentioned main control chip 2 according to mode described in this embodiment from the market
Function is answered, is not required to carry out quadratic programming exploitation.
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.And the obvious changes or variations that these connotations for belonging to the utility model are extended out still fall within it is practical
Novel protection scope.
Claims (5)
1. a kind of external leakage-current alarm module, including insulation crust, the control circuit board being arranged in the insulation crust and
The connecting terminal being connected on insulation crust with the control circuit board is set, it is mutual that zero sequence is equipped with outside the insulation crust
Sensor, it is characterised in that: the control circuit board is equipped with main control chip, main power circuit, delay setting circuit and electric leakage electricity
Stream setting circuit, the connecting terminal are connect with the main power circuit, and the main power circuit passes through the first rectifying and voltage-stabilizing electricity
Road is connected with the power pins of the main control chip, has the sampling pin with the main control chip on the control circuit board
The sample circuit being connected, the sample circuit are connected with the zero sequence transformer, the main control chip by photoelectric coupled circuit,
First ghyristor circuit is connected with relay, and the relay is connected with external alarm interface, and described first is silicon-controlled
Circuit is also connected with leakage current indicator light, and the delay setting circuit and leakage current setting circuit are electrically connected with the main control chip
It connects.
2. external leakage-current alarm module according to claim 1, it is characterised in that: further include and the main control chip phase
Second ghyristor circuit of connection and the tripping driving circuit being connected with second ghyristor circuit；
It further include auxiliary power circuit, the second voltage regulator circuit being connected with the auxiliary power circuit and second pressure stabilizing
The touch-switch that circuit is connected, the touch-switch are connected with the power end of the relay.
3. external leakage-current alarm module according to claim 1 or 2, it is characterised in that: circuit is arranged in the delay
It (10) include three gear regulating switch (K1-B), first capacitor (C1-B), the second capacitor (C2-B), third capacitor (C3-B) and first
Resistance (R9-B), a contact series, the second capacitor (C2-B) and three of the first capacitor and three gears regulating switch (K1-B)
Second contact series of regulating switch are kept off, one end of the first resistor (R9-B) is connected to first capacitor (C1-B) and second
The other end is grounded on the tie point of capacitor (C2-B), and the third contact of three gears regulating switch (K1-B) passes through third capacitor (C3-
B it) is connected on the tie point of first capacitor (C1-B) and the second capacitor (C2-B) and the third of three gears regulating switch (K1-B) is a
Contact is connected with the delay pin of main control chip (2).
4. external leakage-current alarm module according to claim 1 or 2, it is characterised in that: the leakage current setting electricity
Road includes three gears regulating switch (K2-B), first resistor (R10-B), second resistance (R11-B) and 3rd resistor (R12-B), institute
State three pins of three gear regulating switches (K2-B) respectively with first resistor (R10-B), second resistance (R11-B), 3rd resistor
It is connected on the reference voltage pin of main control chip (2) after 3rd resistor (R12-B) series connection.
5. external leakage-current alarm module according to claim 1, it is characterised in that: the model of the main control chip
SN54133, M54133 or LW54133 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821867517.0U CN209231444U (en) | 2018-11-13 | 2018-11-13 | External leakage-current alarm module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821867517.0U CN209231444U (en) | 2018-11-13 | 2018-11-13 | External leakage-current alarm module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209231444U true CN209231444U (en) | 2019-08-09 |
Family
ID=67502822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821867517.0U Active CN209231444U (en) | 2018-11-13 | 2018-11-13 | External leakage-current alarm module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209231444U (en) |
-
2018
- 2018-11-13 CN CN201821867517.0U patent/CN209231444U/en active Active
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