CN102354869B - Electricity leakage protection plug with alarm device - Google Patents
Electricity leakage protection plug with alarm device Download PDFInfo
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- CN102354869B CN102354869B CN 201110239307 CN201110239307A CN102354869B CN 102354869 B CN102354869 B CN 102354869B CN 201110239307 CN201110239307 CN 201110239307 CN 201110239307 A CN201110239307 A CN 201110239307A CN 102354869 B CN102354869 B CN 102354869B
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Abstract
The invention discloses an electricity leakage protection plug with an alarm device. The plug can not only prevent electric shock accidents caused by electrical appliance faults, but also prevent electric shock accidents caused by accidental electrification of ground wires. The plug is characterized in that a ground wire electrification detection circuit is connected between a phase wire and a null wire and a ground wire at the power supply end of the plug and comprises a rectifying, voltage-reducing and voltage-stabilizing circuit, a voltage comparing circuit, an alarm indicator lamp and a photoelectrical coupling circuit. Through comparison between the ground wire voltage and the preset reference voltage, the plug can carry out operation and alarm indications of trip and outage once the ground wire carries a dangerous voltage.
Description
Technical field
The present invention relates to Electrical Safety resist technology field, especially relate to a kind of band warning device leakage protecting plug.
Background technology
It is the leakage protecting plug that a kind of ground wire of CN1142618C can open and close that Chinese patent literature discloses publication number, not only be provided with the zero sequence current mutual inductor that phase line and zero line all pass on this leakage protecting plug, also be provided with the ground wire electrified detection inductor that ground wire passes, therefore it not only can detect between load end phase line and the zero line and have or not residual current, when occurring residual current between phase, the zero line and reaching the threshold values that presets (for example: 10mA), it will be threaded off immediately, cuts off phase line, zero line and ground wire; And when the ground protection system exception causes the ground wire accident charged; it can also detect the load end ground wire the zero accident electric current; (for example: 10mA), it also can be threaded off immediately, cuts off phase line, zero line and ground wire when ground wire unexpected electric current occurs and reaches the threshold values that presets.
Hence one can see that, existing leakage protecting plug in the unexpected precondition that can thread off when charged of the electric leakage of load end fault or ground wire exactly: must have between load end phase, the zero line and must have a mind to extrinsic current on residual current or the load end ground wire and flow through.So just there is following defective in existing leakage protecting plug: during use; no matter be when ground protection system ground wire disappearance (for example: the virtual connection of socket ground wire causes without ground connection) or the electric leakage of leakage protecting plug load end consuming device insulation fault; or when ground protection system exception (for example: phase line, earth short) causes the ground wire accident charged; dangerous voltage on the exposed metal parts band of consuming device is caused in the capital; but they all do not consist of loop of electric leakage, thereby also do not produce the unexpected electric current of residual current or ground wire.Although consuming device exposed metal parts have been with dangerous voltage, existing leakage protecting plug can not threaded off in this case automatically; Only have when people or livestock touch these band power on the exposed metal parts time, just form loop of electric leakage through people or livestock, thereby produce residual current or the unexpected electric current of ground wire leakage protecting plug is threaded off and phase line, zero line, ground wire disconnection in 0.1S.Although in time threading off, it has protected the life security of people or livestock; but existing leakage protecting plug be in this case must be first by people or livestock get an electric shock produce residual current or the unexpected electric current of ground wire and flow through the people or livestock after; it could be threaded off phase line, zero line, ground wire are disconnected, so existing leakage protecting plug still can cause the electric shock of people or livestock.
Summary of the invention
The object of the present invention is to provide a kind of leakage protecting plug that can overcome above-mentioned existing leakage protecting plug defective, electric leakage or ground wire not only can occur in load end phase, zero line road and meet accident and can all disconnect phase line contact, zero line contact and ground wire contact in time when charged in it; And can also be when the ground protection system ground connection disappearance (for example: the virtual connection of socket ground wire causes without ground connection) and the electric leakage of leakage protecting plug load end consuming device occur and causes on the electric appliance casing band dangerous voltage; or ground protection system abnormal is when causing the situation of ground tape dangerous voltage; people or livestock just can be threaded off before touching consuming device automatically; in time phase line, zero line and ground wire are disconnected, for people provide more reliable leakage protecting plug and Electrical Safety guarantee.
Technical solution proposed by the invention is as follows:
A kind of band warning device leakage protecting plug; comprise shell and latch; phase line 6; zero line 5; ground wire 7; the zero sequence current mutual inductor 15 that phase line 6 and zero line 5 all pass; the test loop; electromagnetic trip and locker; this electromagnetic trip and locker comprise solenoid 11 and drive circuit 34 thereof; contact; spring; push rod resets; described drive circuit 34 is mainly by rectification circuit 12; controllable silicon 13 forms; the phase line 6 of described power end; be connected with ground wire electrified detection warning circuit 33 between zero line 5 and the ground wire 7; this ground wire electrified detection circuit 33 is by rectification decompression voltage regulator 23; voltage comparator circuit 29; alarm lamp and photoelectric coupling circuit form; the power end of photoelectric coupling circuit is connected with rectification circuit 12 outputs, and photoelectric coupled circuit output end is connected with the trigger electrode of controllable silicon 13.
When the leakage protecting plug with warning device accessed power end, ground wire electrified detection circuit 33 was just started working, and voltage comparator circuit 29 can compare the reference voltage of ground wire 7 voltages and setting.Charged and reach when setting threshold values when ground wire 7, voltage comparator circuit 29 can make light-emitting diode 30 conductings light, and make luminous tube conducting in the photoelectrical coupler, thereby make the also conducting of phototriode in the photoelectrical coupler, trigger the controllable silicon 13 of drive circuit 34, make solenoid 11 actions, disconnect phase, zero-sum ground wire, realized outage, light-emitting diode 30 is lighted warning always simultaneously, and reminding user will be got rid of the hidden danger of ground wire electrification as early as possible.
Characteristics of the present invention be except same can detect have or not residual current between load phase, the zero line and detect ground wire whether charged, and between phase, zero line with ground wire break down respectively or simultaneously Shi Douhui move immediately mutually, zero, outside ground wire all disconnects; The power end that also is leakage protecting plug of the present invention also is connected with the ground wire electrified detection circuit.When causing the ground wire accident, the ground protection system exception is with upper dangerous voltage; or ground protection system earth disappearance; or consuming device electric leakage is when causing on exposed metal parts and the ground tape dangerous voltage; it can detect and report to the police automatically; leakage protecting plug is threaded off automatically, phase line, zero line, ground wire are disconnected.Thereby realized people or livestock touch these with on before the exposed metal parts of dangerous voltage, just phase line, zero line, ground wire are disconnected entirely.
Compared with prior art, the present invention has following remarkable result:
(1) band warning device leakage protecting plug of the present invention is owing to be connected with the ground wire electrified detection circuit at power end; in use; in case the electric leakage of the consuming device fault on leakage protecting plug load end phase, the zero line; or the ground protection system exception is when causing the ground wire accident to be with dangerous voltage; the metal parts that consuming device exposes and leakage protecting plug ground wire all can be with dangerous voltage; the ground wire electrified detection circuit just can detect at once, and enforcement is reported to the police and trigger control circuit is cut off the electricity supply and held phase line, zero line and ground wire.Needn't touch and flow through residual current by people or livestock and could thread off afterwards.
(2) band warning device leakage protecting plug of the present invention is owing to be connected with the ground wire electrified detection circuit at power end; in use; when in case ground protection system ground wire disappearance (the socket ground wire is without ground connection) and load end consuming device do not have ground connection yet; the ground wire electrified detection circuit just can detect at once, and enforcement is reported to the police and trigger control circuit is cut off the electricity supply and held phase line, zero line and ground wire.The reminding user ground wire is unusual.
(3) band warning device leakage protecting plug of the present invention is owing to be connected with the ground wire electrified detection circuit at power end; in use; exceed the safe voltage threshold values that presets when lower (such as 24V, or) as long as ground wire electrification is pressed, leakage protecting plug of the present invention just can be threaded off and report to the police.
(4) of the present inventionly also can automatically thread off when the phase line of power end and the zero line reversal connection with the warning device leakage protecting plug; can not reset; only have just coming into operation after the correction of the wiring state of supply socket phase line and zero line; forcibly standard the user side supply socket wiring requirement that must meet national regulation connect, in case there is potential safety hazard when using.
On the earth leakage protective that is applicable to various household electrical appliance with the warning device leakage protecting plug of the present invention.
Description of drawings
Fig. 1 is the band warning device leakage protecting plug electrical principle schematic diagram of the embodiment of the invention 1, rectification decompression voltage regulator resistance step-down among the figure, and voltage comparator circuit is inputted manner of comparison with the amplifying circuit negative pole.
Fig. 2 is the band warning device leakage protecting plug electrical principle schematic diagram of the embodiment of the invention 2, rectification decompression voltage regulator capacitance decompression among the figure, and voltage comparator circuit is inputted manner of comparison with the amplifying circuit positive pole.
Fig. 3 is another band warning device leakage protecting plug electrical principle schematic diagram of the embodiment of the invention 2, and the signal output part of photoelectric coupling circuit is connected with the amplifying circuit signal input part of drive circuit among the figure.
Embodiment
By following embodiment the present invention is further elaborated.
Embodiment 1
Referring to shown in Figure 1, a kind of band warning device leakage protecting plug is mainly by forming with lower member: plug body and phase, zero, phase line 6, zero line 5, ground wire 7, phase line 8, zero line 9, ground wire 10, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4, solenoid 11, spring and the push rod that resets, test loop, drive circuit 34, zero sequence current mutual inductor 15 and the ground wire electrified detection circuit 33 of load end of three utmost point latches, power end form.Drive circuit 34 is by rectification circuit 12, and controllable silicon 13, diode 17, amplifying circuit 14 and the 8th resistance 16 form.Ground wire electrified detection circuit 33 is comprised of rectification decompression voltage regulator 23, voltage comparator circuit 29, light-emitting diode 30, photoelectrical coupler 31, the 7th resistance 32 and the 8th resistance 16.Rectification decompression voltage regulator 23 is comprised of the 1st diode 18, the 1st resistance 19, the 2nd resistance 20, voltage stabilizing didoe 21 and the 1st electric capacity 22.Voltage comparator circuit 29 is comprised of the 4th resistance 24, the 5th resistance 26, the 6th resistance 27, the 2nd diode 25 and amplifying circuit 28.
In the present embodiment, be connected with rectification decompression voltage regulator 23 between the phase line 6 of power end, zero line 5 and the ground wire 7.The phase line 6 of power end is connected with the positive pole of the 1st diode 18, the negative pole of the 1st diode 18 is connected with an end of the 1st resistance 19, the negative pole that the other end of the 1st resistance 19 and an end of the 2nd resistance 20 are connected with voltage stabilizing didoe and the positive pole of the 1st electric capacity 22 are connected, and the negative pole anodal and the 1st electric capacity 22 that the other end of the 2nd resistance 20 is connected with voltage stabilizing didoe is connected with the zero line 5 of power end.Power supply is by after 18 rectifications of the 1st diode, the 1st resistance 18 and 20 step-downs of the 2nd resistance, voltage stabilizing didoe 23 voltage stabilizings and 22 filtering of the 1st electric capacity, the positive pole of the 1st electric capacity 22 is as the output head anode of rectification decompression voltage regulator 23, the negative pole of the 1st electric capacity 22 provides power supply as the negative pole of output end of rectification decompression voltage regulator 23 to voltage comparator circuit 29.
Alarm lamp and photoelectric coupling circuit are comprised of light-emitting diode 30, photoelectrical coupler 31, the 7th resistance 32 and the 8th resistance 16.Luminous tube in the photoelectrical coupler 31 is anodal to be connected with the high potential output of voltage comparator circuit 29, luminous tube negative pole in the photoelectrical coupler 31 is connected with the positive pole of light-emitting diode 30, light-emitting diode 30 negative poles are connected with the electronegative potential output of voltage comparator circuit 29, one end of the 8th resistance 16 in the phototriode collector electrode in the photoelectrical coupler 31 and the drive circuit 34 is connected, the other end of the 8th resistance 16 is connected with the cathode output end of rectification circuit 12 in the drive circuit 34, phototriode emitter in the photoelectrical coupler 31 is connected with an end of the 7th resistance 32, the other end of the 7th resistance 32 is connected with rectification road 12 cathode output ends in the drive circuit 34, and the trigger electrode of the controllable silicon 13 in the phototriode emitter in the photoelectrical coupler 31 and the tie point of the 7th resistance 32 and the drive circuit 34 is connected.
In the use, the push rod that resets of leakage protecting plug is pressed, and phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1 and ground wire contact 3 and 4 are connected, and the phase line 8 of load end, zero line 9, ground wire 10 are connected with phase line 6, zero line 5, the ground wire 7 of power end respectively.The zero line 5 of power end is zero with the voltage of ground wire 7 during normal condition, only has phase line 6 charged.Phase line 6 and zero line 5 provide power supply for the rectification decompression voltage regulator 23 of ground wire electrified detection circuit 33, and rectifying and voltage-stabilizing reduction voltage circuit 23 provides power supply and reference voltage for voltage comparator circuit 29.The 2nd diode 25 in the voltage comparator circuit 29 is connected with ground wire 7, and voltage comparator circuit 29 is by judging output high level or low level to the voltage of ground wire 7 and the contrast of reference voltage.
Voltage when ground wire 7 and 10 is zero, or with voltage and do not reach when setting threshold values (such as 24V), the output of amplifying circuit 28 still keeps high level, be connected to light-emitting diode 30 and the photoelectrical coupler 31 not conductings (being that alarm lamp does not work) of 29 liang of outputs of voltage comparator circuit, phototriode in the photoelectrical coupler 31 does not have conducting yet, controllable silicon 13 is not received triggering signal, keep cut-off state, drive circuit 34 does not drive solenoid 11, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 still remains closed.
Non-vanishing and institute is with voltage when setting threshold values (such as 24V) when the voltage of ground wire 7 and 10, or ground wire virtual connection and when causing without ground connection, the output of amplifying circuit 28 then transfers low level to, the light-emitting diode 30 and photoelectrical coupler 31 conductings that are connected to 29 liang of outputs of voltage comparator circuit (are that alarm lamp is lighted, the prompting user ground wire electrification), also immediately conducting of phototriode in the photoelectrical coupler 31, triggering signal is delivered to the trigger electrode of controllable silicon 13, make it become conducting state by cut-off state, drive circuit 34 drives solenoid 11 actions, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 will disconnect immediately.
Electric leakage and ground protection system exception cause ground wire 7 and 10 accident is charged when occuring simultaneously when the phase line 8 of load end, consuming device on the zero line 9 break down, owing to residual current occurs by zero sequence current mutual inductor 15, amplifying circuit 14 in the drive circuit 34 is delivered to by diode 17 on the trigger electrode of controllable silicon 13 after can amplifying processing from the induced signal of zero sequence current mutual inductor 15; Simultaneously, also be added on the trigger electrode of controllable silicon 13 from the triggering signal of ground wire electrified detection circuit 33.As long as one of them signal arrives first, or two signal arrive simultaneously the trigger electrode of controllable silicon 13, can both make controllable silicon 13 conductings, drive circuit 34 drives solenoid 11 actions, and phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 will disconnect immediately.
When the zero utmost point of Power supply socket connects instead with the utmost point mutually, when namely the zero line 5 of power end and phase line 6 were by reversal connection, zero line 5 was charged, and phase line 6 and ground wire 7 are no-voltage.Rectification decompression voltage regulator 23 in the ground wire electrified detection circuit 33 is in the negative half period work of the sinusoidal alternating current of power end, the voltage of ground wire 7 is higher than the reference voltage of voltage comparator circuit 29 at this moment, then amplifying circuit 28 outputs are low level, the light-emitting diode 30 and photoelectrical coupler 31 conductings that are connected to 29 liang of outputs of voltage comparator circuit (are that alarm lamp is lighted, the prompting user power end zero connects instead mutually), also immediately conducting of phototriode in the photoelectrical coupler 31, triggering signal is delivered to the trigger electrode of controllable silicon 13, make it become conducting state by cut-off state, drive circuit 34 drives solenoid 11 actions, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 will disconnect immediately.
Embodiment 2
Referring to shown in Figure 2, a kind of band warning device leakage protecting plug is mainly by forming with lower member: plug body and phase, zero, phase line 6, zero line 5, ground wire 7, phase line 8, zero line 9, ground wire 10, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4, solenoid 11, spring and the push rod that resets, test loop, drive circuit 34, zero sequence current mutual inductor 15 and the ground wire electrified detection circuit 33 of load end of three utmost point latches, power end form.Drive circuit 34 is comprised of rectification circuit 12, controllable silicon 13, diode 17, amplifying circuit 14 and the 9th resistance 16.Ground wire electrified detection circuit 33 is comprised of rectification decompression voltage regulator 23, voltage comparator circuit 29, light-emitting diode 30, photoelectrical coupler 31, the 7th resistance 32 and the 8th resistance 16.Rectification decompression voltage regulator 23 is comprised of the 1st diode 18, the 3rd resistance 35, the 2nd electric capacity 36, voltage stabilizing didoe 21 and the 1st electric capacity 22.Voltage comparator circuit 29 is comprised of the 4th resistance 24, the 5th resistance 26, the 6th resistance 27, the 2nd diode 25 and amplifying circuit 28.
In the present embodiment, be connected with rectification decompression voltage regulator 23 between the phase line 6 of power end, zero line 5 and the ground wire 7.The phase line 6 of power end is connected with the positive pole of the 1st diode 18, the negative pole of the 1st diode 18 is connected with an end of the 3rd resistance 25, the 3rd resistance 25 and the 2nd electric capacity 36 are connected in parallel, the other end of the 3rd resistance 25 is connected with the negative pole of voltage stabilizing didoe 21 and the positive pole of the 1st electric capacity 22, and the negative pole anodal and the 1st electric capacity 22 of voltage stabilizing didoe 21 is connected with the zero line 5 of power end.After power end passes through 18 rectifications of the 1st diode and 36 step-downs of the 2nd electric capacity, voltage stabilizing didoe 21 voltage stabilizings and 22 filtering of the 1st electric capacity, the positive pole of the 1st electric capacity 22 is as the output head anode of rectification decompression voltage regulator 23, the negative pole of the 1st electric capacity 22 provides power supply as the negative pole of output end of rectification decompression voltage regulator 23 to voltage comparator circuit 29.
Alarm lamp and photoelectric coupling circuit are comprised of light-emitting diode 30, photoelectrical coupler 31, the 7th resistance 32 and the 8th resistance 16.Luminous tube in the photoelectrical coupler 31 is anodal to be connected with the high potential output of voltage comparator circuit 29, luminous tube negative pole in the photoelectrical coupler 31 is connected with the positive pole of light-emitting diode 30, light-emitting diode 30 negative poles are connected with the electronegative potential output of voltage comparator circuit 29, one end of the 8th resistance 16 in the phototriode collector electrode in the photoelectrical coupler 31 and the drive circuit 34 is connected, the other end of the 8th resistance 16 is connected with the cathode output end of rectification circuit 12 in the drive circuit 34, phototriode emitter in the photoelectrical coupler 31 is connected with an end of the 7th resistance 32, the cathode output end of the rectification circuit 12 in the other end of the 7th resistance 32 and the drive circuit 34 is connected, and the trigger electrode of the controllable silicon 13 in the phototriode emitter in the photoelectrical coupler 31 and the tie point of the 7th resistance 32 and the drive circuit 34 is connected.
In the use, the push rod that resets of leakage protecting plug is pressed, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1 and ground wire contact 3 and 4 are connected, and the phase line 8 of load end, zero line 9, ground wire 10 are connected with phase line 6, zero line 5, the ground wire 7 of power end respectively.The zero line 5 of power end is zero with the voltage of ground wire 7 during normal condition, only has phase line 6 charged.Phase line 6 and zero line 5 provide power supply for the rectification decompression voltage regulator 23 in the ground wire electrified detection circuit 33, and rectifying and voltage-stabilizing reduction voltage circuit 23 provides power supply and reference voltage for voltage comparator circuit 29.The 2nd diode 25 in the voltage comparator circuit 29 is connected with ground wire 7, and voltage comparator circuit 29 is by judging output low level or high level to the voltage of ground wire 7 and the contrast of reference voltage.
Voltage when ground wire 7 and 10 is zero, or with voltage and do not reach when setting threshold values (such as 24V), the output of amplifying circuit 28 still keeps low level, be connected to light-emitting diode 30 and the photoelectrical coupler 31 not conductings (being that alarm lamp does not work) of 29 liang of outputs of voltage comparator circuit, phototriode in the photoelectrical coupler 31 does not have conducting yet, controllable silicon 13 is not received triggering signal, keep cut-off state, drive circuit 34 does not drive tripping coil 11, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 still remains closed.
Non-vanishing and institute is with voltage when setting threshold values (such as 24V) when the voltage of ground wire 7 and 10, or ground wire virtual connection and when causing without ground connection, the output of amplifying circuit 28 then transfers high level to, the light-emitting diode 30 and photoelectrical coupler 31 conductings that are connected to 29 liang of outputs of voltage comparator circuit (are that alarm lamp is lighted, the prompting user ground wire electrification), the phototriode of photoelectrical coupler 31 is immediately conducting also, triggering signal is delivered to the trigger electrode of controllable silicon 13, make it become conducting state by cut-off state, drive circuit 34 drives solenoid 11 actions, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 will disconnect immediately.
When the phase line 8 of load end, consuming device on the zero line 9 break down electric leakage when causing ground wire 7 and 10 unexpected charged whiles all to occur with the ground protection system exception, owing to residual current occurs by zero sequence current mutual inductor 15, amplifying circuit 14 in the drive circuit 34 is delivered to by diode 17 on the trigger electrode of controllable silicon 13 after can amplifying processing from the induced signal of zero sequence current mutual inductor 15; Simultaneously, also be added on the trigger electrode of controllable silicon 13 from the triggering signal of ground wire electrified detection circuit 33.As long as one of them signal arrives first, or two signal arrive simultaneously the trigger electrode of controllable silicon 13, can both make controllable silicon 13 conductings, drive circuit 34 drives solenoid 11 actions, and phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 will disconnect immediately.
When the zero utmost point of Power supply socket connects instead with the utmost point mutually, when namely the zero line 5 of power end and phase line 6 were by reversal connection, zero line 5 was charged, and phase line 6 and ground wire 7 are no-voltage.Rectification decompression voltage regulator 23 in the ground wire electrified detection circuit 33 is in the negative half period work of the sinusoidal alternating current of power end, the voltage of ground wire 7 is higher than the reference voltage of voltage comparator circuit 29 at this moment, then amplifying circuit 28 outputs are high level, the light-emitting diode 30 and photoelectrical coupler 31 conductings that are connected to 29 liang of outputs of voltage comparator circuit (are that alarm lamp is lighted, the prompting user power end zero connects instead mutually), immediately conducting of phototriode in the photoelectrical coupler 31, triggering signal is delivered to the trigger electrode of controllable silicon 13, make it become conducting state by cut-off state, drive circuit 34 drives solenoid 11 actions, phase line contact 2-2 and 1-2, zero line contact 2-1 and 1-1, ground wire contact 3 and 4 will disconnect immediately.
Claims (6)
1. band warning device leakage protecting plug; comprise shell and latch; phase line (6); zero line (5); ground wire (7); the zero sequence current mutual inductor (15) that phase line (6) and zero line (5) all pass; the test loop; electromagnetic trip and locker; this electromagnetic trip and locker comprise solenoid (11) and drive circuit (34) thereof; contact; spring; push rod resets; the drive circuit (34) of described solenoid (11) is mainly by rectification circuit (12); controllable silicon (13) forms; it is characterized in that: in the phase line (6) of described power end; be connected with ground wire electrified detection circuit (33) between zero line (5) and the ground wire (7); this ground wire electrified detection circuit (33) is by rectification decompression voltage regulator (23); voltage comparator circuit (29); alarm lamp and photoelectric coupling circuit form; the power end of photoelectric coupling circuit is connected with rectification circuit (12) output, and the output of photoelectric coupling circuit is connected with the trigger electrode of controllable silicon (13).
2. band warning device leakage protecting plug according to claim 1; it is characterized in that: the rectification decompression voltage regulator (23) in the described ground wire electrified detection circuit (33) is by the 1st diode (18); the 1st resistance (19); the 2nd resistance (20); voltage stabilizing didoe (21) and the 1st electric capacity (22) form; described the 1st diode (18) is rectifier cell; its positive pole is connected with power end phase line (6); its negative pole is connected with an end of the 1st resistance (19); one end of the other end of the 1st resistance (19) and the 2nd resistance (20); the negative pole of voltage stabilizing didoe (21); the positive pole of the 1st electric capacity (22) connects; the other end of described the 2nd resistance (20); the negative pole anodal and the 1st electric capacity (19) of voltage stabilizing didoe (21) is connected with the zero line (5) of power end; the output head anode of the just very rectification decompression voltage regulator of the 1st electric capacity (22), the negative pole of the 1st electric capacity (22) is the negative pole of output end of rectification decompression voltage regulator.
3. band warning device leakage protecting plug according to claim 1; it is characterized in that: the rectification decompression voltage regulator (23) of described ground wire electrified detection circuit (33) is by the 1st diode (18); the 3rd resistance (35); voltage stabilizing didoe (21); the 2nd electric capacity (36) and the 1st electric capacity (22) form; the 1st diode (18) is rectifier cell; its positive pole is connected with power end phase line (6); its negative pole is connected with an end of the 3rd resistance (35); the 3rd resistance (35) is in parallel with the 2nd electric capacity (36); the other end of the 3rd resistance (35) is connected with the negative pole of voltage stabilizing didoe (21) and the positive pole of the 1st electric capacity (22); the positive pole of voltage stabilizing didoe (21); the negative pole of the 1st electric capacity (22) is connected with the zero line (5) of power end; the output head anode of the just very rectification decompression voltage regulator of the 1st electric capacity (22), the negative pole of the 1st electric capacity (22) is the negative pole of output end of rectification decompression voltage regulator.
4. band warning device leakage protecting plug according to claim 1; it is characterized in that: the voltage comparator circuit (29) of described ground wire electrified detection circuit (33) is by the 4th resistance (24); the 5th resistance (26); the 6th resistance (27); the 2nd diode (25) forms with amplifying circuit (28); be connected with the 4th resistance (24) between the positive source of amplifying circuit (28) and its signal electrode input end; the signal negative input of amplifying circuit (28) is connected with an end of the 5th resistance (26); the other end of the 5th resistance (26) is connected with the negative pole of the 2nd diode (25); the positive pole of the 2nd diode (25) is connected with the ground wire (7) of power end; the positive source of amplifying circuit (28) is connected with the output head anode of rectification decompression voltage regulator (23); the power cathode of amplifying circuit (28) is connected with the negative pole of output end of rectification decompression voltage regulator (23); the positive source of amplifying circuit (28) is connected with an end of the 6th resistance (27); the other end of the 6th resistance (27) is the high potential output of voltage comparator circuit (29), and the output of amplifying circuit (28) is the electronegative potential output of voltage comparator circuit (29).
5. band warning device leakage protecting plug according to claim 1; it is characterized in that: the voltage comparator circuit (29) of described ground wire electrified detection circuit (33) is by the 4th resistance (24); the 5th resistance (26); the 6th resistance (27); the 2nd diode (25) forms with amplifying circuit (28); be connected with the 4th resistance (24) between the power cathode of amplifying circuit (28) and its signal negative input; the signal electrode input end of amplifying circuit (28) is connected with an end of the 5th resistance (26); the other end of the 5th resistance (26) is connected with the negative pole of the 2nd diode (25); the positive pole of the 2nd diode (25) is connected with the ground wire (7) of power end; the positive source of amplifying circuit (28) is connected with the output head anode of rectification decompression voltage regulator (23); the power cathode of amplifying circuit (28) is connected with the negative pole of output end of rectification decompression voltage regulator (23); the power cathode of amplifying circuit (28) is connected with an end of the 6th resistance (27); the other end of the 6th resistance (27) is the electronegative potential output of voltage comparator circuit (29), and the output of amplifying circuit (28) is the high potential output of voltage comparator circuit (29).
6. band warning device leakage protecting plug according to claim 1 is characterized in that: alarm lamp and photoelectric coupling
Circuit is by light-emitting diode (30), photoelectrical coupler (31), the 7th resistance (32) and the 8th resistance (16) form, luminous tube in the photoelectrical coupler (31) is anodal to be connected with the high potential output of voltage comparator circuit (29), luminous tube negative pole in the photoelectrical coupler (31) is connected with the positive pole of light-emitting diode (30), light-emitting diode (30) negative pole is connected with the electronegative potential output of voltage comparator circuit (29), phototriode collector electrode in the photoelectrical coupler (31) is connected with an end of the 8th resistance (16), the other end of the 8th resistance (16) is connected with rectification circuit (12) cathode output end in the drive circuit (34), phototriode emitter in the photoelectrical coupler (31) is connected with an end of the 7th resistance (32), the cathode output end of the rectification circuit (12) in the other end of the 7th resistance (32) and the drive circuit (34) is connected, and the phototriode emitter in the photoelectrical coupler (31) is connected with controllable silicon (13) trigger electrode of drive circuit (34) with the tie point of the 7th resistance (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110239307 CN102354869B (en) | 2011-08-19 | 2011-08-19 | Electricity leakage protection plug with alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110239307 CN102354869B (en) | 2011-08-19 | 2011-08-19 | Electricity leakage protection plug with alarm device |
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| Publication Number | Publication Date |
|---|---|
| CN102354869A CN102354869A (en) | 2012-02-15 |
| CN102354869B true CN102354869B (en) | 2013-03-27 |
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| CN 201110239307 Active CN102354869B (en) | 2011-08-19 | 2011-08-19 | Electricity leakage protection plug with alarm device |
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| CN104795789B (en) * | 2015-03-20 | 2017-07-28 | 张家港市佰瑞普电器科技有限公司 | A kind of automatic monitoring circuit of earth fault earth leakage protective device |
| US10520529B2 (en) * | 2016-03-23 | 2019-12-31 | Cooper Technologies Company | Adapters for testing electrical equipment |
| CN111864691B (en) * | 2019-04-30 | 2023-04-28 | 上海复旦微电子集团股份有限公司 | Ground fault protection circuit |
| WO2021098871A1 (en) * | 2019-11-24 | 2021-05-27 | 邝继伍 | Electric leakage protection switch |
| CN117538798B (en) * | 2024-01-10 | 2024-03-22 | 国网辽宁省电力有限公司 | Electric leakage detector for power grid transmission line |
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| CN201215851Y (en) * | 2008-05-05 | 2009-04-01 | 钱加灿 | Full functional safe plug |
| CN202183530U (en) * | 2011-08-19 | 2012-04-04 | 刘睿刚 | Electric leakage protection plug with alarming device |
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| US20040070895A1 (en) * | 2002-10-09 | 2004-04-15 | Gershen Bernard J. | Leakage current detection interrupter extension cord with cord diagnostics and/or inadvertent ground-to-neutral detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201215851Y (en) * | 2008-05-05 | 2009-04-01 | 钱加灿 | Full functional safe plug |
| CN202183530U (en) * | 2011-08-19 | 2012-04-04 | 刘睿刚 | Electric leakage protection plug with alarming device |
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