Adjustable electric shock protection intelligent electric energy meter

Abstract

The application relates to an adjustable electric shock protection intelligent electric energy meter, and relates to an intelligent electric energy meter which aims at solving the problems of poor sensitivity of the existing electric shock protection device and inability to restore power supply in time. The counter inductance is oppositely arranged with the current transformer, the number of turns of the counter inductance is the same as that of the primary coil of the current transformer, and the winding directions are opposite; the common end of the relay switch is connected with the fire wire, the relay switch is connected with the counter inductance, the counter inductance is connected with the electric energy meter body; the primary coil of the current transformer is connected with the zero wire, and the current transformer is connected with the electric energy meter body; the electric shock protector is used for converting the trigger signal output by the current transformer into a control signal, and the control signal is used for controlling the relay, so that the intelligent electric energy meter is cut off from the fire wire; the adjusting button is arranged on the electric shock protector and is used for adjusting the control signal of the electric shock protector. The application has the advantages of improving the sensitivity of the electric shock reaction and being capable of restoring power supply in time.

Description

TECHNICAL FIELD

[0001] The application relates to an intelligent electric energy meter. BACKGROUND

[0002] The intelligent electric energy meter is a terminal device of a power grid, which has a bidirectional multi-rate metering function, a user terminal control function and an anti-theft function in addition to a basic power consumption metering function; in order to ensure the safety of the intelligent electric energy meter, a touch electric protection device is arranged on the existing intelligent electric energy meter; after the existing touch electric protection device is triggered, power supply needs to be restored manually, and the power supply recovery time is not timely, which influences the normal use of household power supply; meanwhile, the touch electric protection device is used to protect the human body from electric shock when the intelligent electric energy meter has a touch electric fault; the triggering condition of the existing touch electric protection device is that the current duration of the human body exceeds a certain value, that is, the existing touch electric protection device does not trigger a protection action in the moment of electric shock, and therefore the sensitivity of the existing touch electric protection device is poor. SUMMARY

[0003] The application aims to solve the problems of poor sensitivity and untimely power supply recovery of the existing touch electric protection device, and provides an adjustable touch electric protection intelligent electric energy meter.

[0004] The adjustable touch electric protection intelligent electric energy meter comprises a base and an electric energy meter body.

[0005] The base is of a rectangular structure, and the electric energy meter body is arranged on the base.

[0006] The intelligent electric energy meter further comprises a relay, a counter inductance, a current transformer and a touch electric protector.

[0007] The relay, the counter inductance, the current transformer and the touch electric protector are arranged on the base respectively, the counter inductance and the current transformer are arranged oppositely, the number of turns of the counter inductance is the same as that of the primary coil of the current transformer, and the winding directions are opposite.

[0008] The common end of the relay switch is connected with the fire wire of 220V mains, the normally closed contact of the relay switch is connected with one end of the counter inductance, and the other end of the counter inductance is connected with the fire wire input end of the electric energy meter body.

[0009] One end of the primary coil of the current transformer is connected with the zero wire of 220V mains, and the other end of the primary coil of the current transformer is connected with the zero wire input end of the electric energy meter body.

[0010] The electric shock protector is used for converting a trigger signal output by a current transformer into a control signal, and controlling a relay by using the control signal, so that the intelligent electric energy meter is cut off from a 220V mains live wire; and the electric shock protector is provided with a first trigger end, a second trigger end, a first control end and a second control end, the first trigger end of the electric shock protector is connected with one end of a secondary coil of the current transformer, and the second trigger end of the electric shock protector is connected with the other end of the secondary coil of the current transformer; the first control end of the electric shock protector is connected with one end of a relay coil, and the second control end of the electric shock protector is connected with the other end of the relay coil.

[0011] The electric shock protector is provided with an adjusting button, and the control signal output by the first control end and the second control end of the electric shock protector is adjusted by the adjusting button.

[0012] Further, the electric shock protector 7 comprises resistors R1 to R9, capacitors C1 to C3, an amplifier T1, a comparator L1, a slide rheostat RP, diodes D1 to D8, transistors Q1 to Q3, a controller U1, switches K1 to K4 and a loudspeaker H1.

[0013] One end of the resistor R1 is the first trigger end of the electric shock protector.

[0014] The other end of the resistor R1 is connected with the cathode of the diode D1, the anode of the diode D2, the inverting input end of the amplifier T1, the anode of the diode D3 and one end of the resistor R2 at the same time; the non-inverting input end of the amplifier T1 is connected with the anode of the diode D1, the cathode of the diode D2 and one end of the resistor R5 at the same time; the positive power supply end of the amplifier T1 is connected with a +12V power supply output end; the negative power supply end of the amplifier T1 is connected with a -12V power supply output end; and the output end of the amplifier T1 is connected with the anode of the diode D4 and the cathode of the diode D3 at the same time.

[0015] The cathode of the diode D4 is connected with the other end of the resistor R2, one end of the capacitor C1 and one end of the resistor R3 at the same time; the other end of the resistor R3 is connected with one end of the capacitor C2 and one end of the capacitor C3 at the same time.

[0016] The other end of the capacitor C1 is connected with the other end of the capacitor C2 and the other end of the resistor R5 at the same time, and is grounded, and the common end of the three is the second trigger end of the electric shock protector.

[0017] The other end of the capacitor C3 is connected with one end of the resistor R4 and the inverting input terminal of the comparator L1; the non-inverting input terminal of the comparator L1 is connected with the moving terminal of the slide rheostat RP; one fixed terminal of the slide rheostat RP is connected with the output terminal of the +12V power supply; the positive power supply terminal of the comparator L1 is connected with the output terminal of the +12V power supply; the negative power supply terminal of the comparator L1 is connected with the output terminal of the -12V power supply; the output terminal of the comparator L1 is connected with the anode of the diode D5; the cathode of the diode D5 is connected with one end of the resistor R6;

[0018] The model of the controller U1 is PROG-110;

[0019] The pin 1 of the controller U1 is connected with the positive power supply terminal of the loudspeaker H1;

[0020] The pin 5 of the controller U1 is connected with the other end of the resistor R6 and the cathode of the diode D6; the anode of the diode D6 is connected with the other end of the resistor R4 and the other fixed terminal of the slide rheostat RP, and grounded;

[0021] The pin 6 of the controller U1 is connected with the anode of the diode D8;

[0022] The pin 7 of the controller U1 is connected with one end of the switch K1;

[0023] The pin 8 of the controller U1 is connected with one end of the switch K2;

[0024] The pin 9 of the controller U1 is connected with one end of the switch K3;

[0025] The pin 10 of the controller U1 is connected with one end of the switch K4 and one end of the resistor R7; the other end of the resistor R7 is connected with the base of the triode Q3; the emitter of the triode Q3 is grounded; the collector of the triode Q3 is connected with the negative power supply terminal of the loudspeaker H1;

[0026] The pin 19 of the controller U1 is connected with the negative terminal of the +5V power supply, and grounded;

[0027] The pin 20 of the controller U1 is connected with the positive terminal of the +5V power supply;

[0028] The cathode of the diode D8 is connected with one end of the resistor R9 and the base of the triode Q1; the emitter of the triode Q1 is connected with the base of the triode Q2; the emitter of the triode Q2 is connected with the other end of the resistor R9, and grounded; the collector of the triode Q1 is connected with the collector of the triode Q2 and the anode of the diode D7, and the connection terminal of the three is the first control terminal of the electric shock protector;

[0029] The cathode of the diode D7 is connected with one end of the resistor R8;

[0030] The other end of the resistor R8 is connected to the +15V power supply output terminal, and the connection end between the two serves as the second control end of the electric shock protector.

[0031] Furthermore, the comparator L1 is of the type LM33;

[0032] The model of the amplifier T1 is: UA741.

[0033] Furthermore, the delay time of the controller U1 is set to 40 seconds.

[0034] Furthermore, the smart energy meter also includes a fuse;

[0035] The fuse is arranged on the base and is located on the right side of the electric energy meter body;

[0036] The live wire input end of the fuse is connected to the live wire output end of the electric energy meter body; the neutral wire input end of the fuse is connected to the neutral wire output end of the electric energy meter body;

[0037] The two output ends of the fuse are respectively the two output ends of the smart electric energy meter, and the two output ends of the fuse are used to be connected to the two power supply ends of the electrical appliance.

[0038] Furthermore, the relay, offset inductor, current transformer and electric shock protector are located on the left side of the electric energy meter body; and the electric shock protector is arranged between the relay and the electric energy meter body; the offset inductor and current transformer are arranged on the side of the relay away from the incoming line end.

[0039] The working principle of the present invention is as follows: Under normal operating conditions, current is output from the live wire (L) end of the 220V mains electricity, passes through the common terminal of the relay, the normally closed contact terminal of the relay, the offset inductor, and the live wire input terminal of the electric energy meter body, enters the electric energy meter body, is output from the live wire output terminal of the electric energy meter body, reaches the load terminal RL, and then flows back to the neutral wire (N) end of the 220V mains electricity through the electric energy meter body and the primary coil of the current transformer. The primary coil of the current transformer and the offset inductor are equal in size and wound in opposite directions. Therefore, the electromotive force generated by the offset inductor exactly offsets the electromotive force generated by the primary coil of the current transformer. At this time, the secondary coil of the current transformer has no induced electromotive force, and the electric shock protector does not operate.

[0040] When the human body touches the smart electric energy meter and gets electric shock, the human body is equivalent to a resistance, which will share the current through the counter inductance, that is, the current through the counter inductance will be greater than the current through the primary coil of the current transformer, at this time, the secondary coil of the current transformer generates an induced electromotive force, which will cause the electric shock protector to enter the working state, thereby generating a control signal, which acts on both ends of the coil of the relay, so that the relay is triggered, and the switch of the relay is switched from the normally closed state to the normally open state, so that the human body quickly escapes from the electric shock.

[0041] The current transformer and the counter inductance are arranged oppositely, so that the sensitivity of the smart electric energy meter to electric shock is greatly improved. When the human body just touches electric shock, the induced electromotive force generated by the secondary coil of the current transformer triggers the switch of the relay to switch from the normally closed state to the normally open state, so that the human body quickly escapes from the electric shock, that is, the working principle of the electric shock protector is instantaneous. At the same time, the adjustment button arranged on the electric shock protector (7) can randomly adjust the sensitivity of electric shock, and the minimum electric shock current reaches 0.1 mA. Moreover, the electric shock protector is provided with a delay automatic recovery function, which can recover in time after automatic power-off, thereby solving the problem that power supply cannot be recovered in time after automatic power-off. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A perspective structural schematic view of the adjustable electric shock protection smart electric energy meter according to the first embodiment;

[0043] Figure 2 A working principle circuit diagram of the adjustable electric shock protection smart electric energy meter according to the first embodiment, wherein the resistor RL is a load (electric appliance) connected to the user circuit. DETAILED DESCRIPTION

[0044] Embodiment I: in combination with Figure 1 and Figure 2 The adjustable electric shock protection smart electric energy meter according to the embodiment is described as follows. The smart electric energy meter comprises a base 1 and an electric energy meter body 2.

[0045] The base 1 is of a rectangular structure, and the electric energy meter body 2 is arranged on the base 1.

[0046] The smart electric energy meter further comprises a relay 4, a counter inductance 5, a current transformer 6 and an electric shock protector 7.

[0047] The relay 4, the counter inductance 5, the current transformer 6 and the electric shock protector 7 are arranged on the base 1 respectively, and the counter inductance 5 and the current transformer 6 are arranged oppositely, and the number of turns of the counter inductance 5 is the same as that of the primary coil of the current transformer 6, and the winding directions are opposite.

[0048] The common terminal of the relay 4 switch is connected with the firewire of 220V mains, the normally closed contact of the relay 4 switch is connected with one end of the cancellation inductor 5, the other end of the cancellation inductor 5 is connected with the firewire input terminal of the electric energy meter body 2; the relay 4 is a normally closed relay;

[0049] One end of the primary coil of the current transformer 6 is connected with the zero line of 220V mains, the other end of the primary coil of the current transformer 6 is connected with the zero line input terminal of the electric energy meter body 2;

[0050] The electric shock protector 7 is used for converting the trigger signal output by the current transformer 6 into a control signal, and controlling the relay 4 by using the control signal, so that the intelligent electric energy meter cuts off the connection with the firewire of 220V mains; and the electric shock protector 7 is provided with a first trigger terminal, a second trigger terminal, a first control terminal and a second control terminal, the first trigger terminal of the electric shock protector 7 is connected with one end of the secondary coil of the current transformer 6, the second trigger terminal of the electric shock protector 7 is connected with the other end of the secondary coil of the current transformer 6; the first control terminal of the electric shock protector 7 is connected with one end of the coil of the relay 4, the second control terminal of the electric shock protector 7 is connected with the other end of the coil of the relay 4;

[0051] The electric shock protector 7 is provided with an adjusting button, and the control signal output by the first control terminal and the second control terminal of the electric shock protector 7 is adjusted by the adjusting button.

[0052] In the normal working state, the current is output from the firewire (L) terminal of 220V mains, sequentially passes through the common terminal of the relay 4, the normally closed contact terminal of the relay 4, the cancellation inductor 5, the firewire input terminal of the electric energy meter body 2, enters the electric energy meter body 2, is output from the firewire output terminal of the electric energy meter body 2, reaches the load terminal RL, and then flows back to the zero line (N) terminal of 220V mains through the electric energy meter body 2 and the primary coil of the current transformer 6; wherein the primary coil of the current transformer 6 and the cancellation inductor 5 are equal in size and opposite in winding direction, so that the electromotive force generated by the cancellation inductor 5 exactly offsets the electromotive force generated by the primary coil of the current transformer 6, at this time, the secondary coil of the current transformer 6 has no induced electromotive force, and the electric shock protector 7 does not work;

[0053] When the human body touches the intelligent electric energy meter and is electric shocked, the human body is equivalent to a resistance and will share the current passing through the cancellation inductor 5, that is, the current passing through the cancellation inductor 5 will be greater than the current passing through the primary coil of the current transformer 6, at this time, the secondary coil of the current transformer 6 generates an induced electromotive force, which causes the electric shock protector 7 to enter the working state, thereby generating a control signal, the control signal acts on both ends of the coil of the relay 4, so that the relay 4 is triggered, and the switch of the relay 4 is converted from the normally closed state to the normally open state, so that the human body quickly escapes from the electric shock.

[0054] In the embodiment, the upper surface of the electric shock protector 7 is provided with a scale on the right side of the adjusting button, and the scale is provided with current values of the electric shock protector 7 entering the working state; the adjusting range of the adjusting button is 0.01 mA to 20 mA.

[0055] In the preferred embodiment, the electric shock protector 7 comprises resistors R1 to R9, capacitors C1 to C3, an amplifier T1, a comparator L1, a sliding rheostat RP, diodes D1 to D8, transistors Q1 to Q3, a controller U1, switches K1 to K4, and a loudspeaker H1.

[0056] One end of the resistor R1 is a first triggering end of the electric shock protector 7.

[0057] The other end of the resistor R1 is connected to the cathode of the diode D1, the anode of the diode D2, the inverting input end of the amplifier T1, the anode of the diode D3, and one end of the resistor R2; the non-inverting input end of the amplifier T1 is connected to the anode of the diode D1, the cathode of the diode D2, and one end of the resistor R5; the positive power supply end of the amplifier T1 is connected to the +12V power supply output end; the negative power supply end of the amplifier T1 is connected to the -12V power supply output end; and the output end of the amplifier T1 is connected to the anode of the diode D4 and the cathode of the diode D3.

[0058] The cathode of the diode D4 is connected to the other end of the resistor R2, one end of the capacitor C1, and one end of the resistor R3; the other end of the resistor R3 is connected to one end of the capacitor C2 and one end of the capacitor C3.

[0059] The other end of the capacitor C1 is connected to the other end of the capacitor C2 and the other end of the resistor R5, and is grounded, and the common end of the three is a second triggering end of the electric shock protector 7.

[0060] The other end of the capacitor C3 is connected to one end of the resistor R4 and the inverting input end of the comparator L1; the non-inverting input end of the comparator L1 is connected to the moving end of the sliding rheostat RP; one fixed end of the sliding rheostat RP is connected to the +12V power supply output end; the positive power supply end of the comparator L1 is connected to the +12V power supply output end; the negative power supply end of the comparator L1 is connected to the -12V power supply output end; the output end of the comparator L1 is connected to the anode of the diode D5; and the cathode of the diode D5 is connected to one end of the resistor R6.

[0061] The model of the controller U1 is PROG-110.

[0062] The 1st pin of the controller U1 is connected to the positive power supply end of the loudspeaker H1.

[0063] The pin 5 of the controller U1 is connected with the other end of the resistor R6 and the cathode of the diode D6; the anode of the diode D6 is connected with the other end of the resistor R4 and the other fixed end of the slide rheostat RP, and grounded;

[0064] The pin 6 of the controller U1 is connected with the anode of the diode D8;

[0065] The pin 7 of the controller U1 is connected with one end of the switch K1;

[0066] The pin 8 of the controller U1 is connected with one end of the switch K2;

[0067] The pin 9 of the controller U1 is connected with one end of the switch K3;

[0068] The pin 10 of the controller U1 is connected with one end of the switch K4 and one end of the resistor R7; the other end of the resistor R7 is connected with the base of the triode Q3; the emitter of the triode Q3 is grounded; the collector of the triode Q3 is connected with the negative power supply end of the loudspeaker H1;

[0069] The pin 19 of the controller U1 is connected with the negative pole of the +5V power supply, and grounded;

[0070] The pin 20 of the controller U1 is connected with the positive pole of the +5V power supply;

[0071] The cathode of the diode D8 is connected with one end of the resistor R9 and the base of the triode Q1; the emitter of the triode Q1 is connected with the base of the triode Q2; the emitter of the triode Q2 is connected with the other end of the resistor R9, and grounded; the collector of the triode Q1 is connected with the collector of the triode Q2 and the anode of the diode D7, and the connection end of the three is the first control end of the electric shock protector 7;

[0072] The cathode of the diode D7 is connected with one end of the resistor R8;

[0073] The other end of the resistor R8 is connected with the output end of the +15V power supply, and the connection end of the two is the second control end of the electric shock protector 7.

[0074] In the embodiment, the moving end of the slide rheostat RP is the adjusting button; the resistor R1, the diode D1, the diode D2, the amplifier T1, the diode D3 and the resistor R2 constitute a half-wave rectifier circuit, the capacitor C1, the capacitor C2 and the resistor R3 constitute a filter circuit, the comparator L1 and the slide rheostat RP constitute an electric shock identification circuit; the capacitor C3 and the resistor R4 constitute a differential circuit; the diode D5, the diode D6 and the resistor R6 constitute a level shift circuit;

[0075] When the voltage inputted into the inverting input end of the comparator L1 is greater than the voltage inputted into the circuit by the slide rheostat RP, that is, when the voltage inputted into the inverting input end of the comparator L1 is greater than the voltage inputted into the non-inverting input end of the comparator L1, the comparator L1 outputs a low level, at this time, when the P1 port of the controller U1 is a low level, the P2 port of the controller U1 outputs a high level, at this time, the triode Q1 and the triode Q2 are both in the conducting state, the electric shock protector 7 generates a control signal; after the delay time of the controller U1 elapses, the P2 port of the controller U1 outputs is transformed into a low level, at this time, the triode Q1 and the triode Q2 are both in the cut-off state, the electric shock protector 7 does not act, and the relay 4 returns to the normally closed state, that is, the power supply is restored in time.

[0076] In the preferred embodiment, the model of the comparator L1 is LM33.

[0077] The model of the amplifier T1 is UA741.

[0078] In the preferred embodiment, the delay time of the controller U1 is set to 40 seconds.

[0079] In the embodiment, the power-off time of 40 seconds is enough for the electric shock person to get rid of the smart electric energy meter, and the power supply can be restored in time and automatically.

[0080] In the preferred embodiment, the smart electric energy meter further comprises a fuse 3.

[0081] The fuse 3 is arranged on the base 1 and located at the right side of the electric energy meter body 2.

[0082] The firewire input end of the fuse 3 is connected with the firewire output end of the electric energy meter body 2, and the zero line input end of the fuse 3 is connected with the zero line output end of the electric energy meter body 2.

[0083] The two output ends of the fuse 3 are respectively two output ends of the smart electric energy meter, and the two output ends of the fuse 3 are used for being connected with two power supply ends of an electric appliance.

[0084] In the embodiment, the fuse 3 is added to prevent the load short circuit of the household circuit.

[0085] In the preferred embodiment, the relay 4, the counter inductance 5, the current transformer 6 and the electric shock protector 7 are located at the left side of the electric energy meter body 2, the electric shock protector 7 is arranged between the relay 4 and the electric energy meter body 2, and the counter inductance 5 and the current transformer 6 are arranged at the side of the relay 4 away from the incoming line end.

[0086] In the embodiment, the above arrangement can save the overall space of the smart electric energy meter, and facilitates wiring and separates the incoming line to the left and right sides.

[0087] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An adjustable electric shock protection smart energy meter, the smart energy meter comprising a base (1) and an energy meter body (2); The base (1) is a rectangular structure, and the electric energy meter body (2) is arranged on the base (1); It is characterized by: The smart electric energy meter also includes a relay (4), a counteracting inductor (5), a current transformer (6) and an electric shock protector (7); The relay (4), the offset inductor (5), the current transformer (6) and the electric shock protector (7) are respectively arranged on the base (1), and the offset inductor (5) and the current transformer (6) are arranged opposite to each other, and the number of turns of the offset inductor (5) is the same as the number of turns of the primary coil of the current transformer (6), and the winding directions are opposite; The common end of the relay (4) switch is connected to the live wire of the 220V mains electricity, the normally closed contact of the relay (4) switch is connected to one end of the offset inductor (5), and the other end of the offset inductor (5) is connected to the live wire input end of the electric energy meter body (2); One end of the primary coil of the current transformer (6) is connected to the neutral line of the 220V commercial power, and the other end of the primary coil of the current transformer (6) is connected to the neutral line input end of the electric energy meter body (2); The electric shock protector (7) is used to convert the trigger signal output by the current transformer (6) into a control signal, and use the control signal to control the relay (4) so ​​that the smart electric energy meter is disconnected from the 220V mains live wire; and the electric shock protector (7) is provided with a first trigger end, a second trigger end, a first control end and a second control end, the first trigger end of the electric shock protector (7) is connected to one end of the secondary coil of the current transformer (6), and the second trigger end of the electric shock protector (7) is connected to the other end of the secondary coil of the current transformer (6); the first control end of the electric shock protector (7) is connected to one end of the relay (4) coil, and the second control end of the electric shock protector (7) is connected to the other end of the relay (4) coil; An adjustment button is provided on the electric shock protector (7), and the control signals outputted by the first control terminal and the second control terminal of the electric shock protector (7) are adjusted by the adjustment button; When a human body touches the smart energy meter and is electrocuted, the human body is equivalent to a resistor and will share the current passing through the offset inductor (5), that is, the current passing through the offset inductor (5) will be greater than the current passing through the primary coil of the current transformer (6). At this time, the secondary coil of the current transformer (6) generates an induced electromotive force, which causes the electric shock protector (7) to enter a working state, thereby generating a control signal. The control signal acts on the two ends of the coil of the relay (4), causing the relay (4) to be triggered, and the switch of the relay (4) is converted from a normally closed state to a normally open state, so that the human body is quickly free from electric shock.

2. The adjustable electric shock protection smart energy meter according to claim 1, characterized in that: The electric shock protector (7) includes resistors R1 to R9, capacitors C1 to C3, an amplifier T1, a comparator L1, a sliding rheostat RP, diodes D1 to D8, transistors Q1 to Q3, a controller U1, switches K1 to K4, and a speaker H1; One end of the resistor R1 is a first triggering end of the electric shock protector (7); The other end of the resistor R1 is simultaneously connected to the cathode of the diode D1, the anode of the diode D2, the inverting input of the amplifier T1, the anode of the diode D3, and one end of the resistor R2; the non-inverting input of the amplifier T1 is simultaneously connected to the anode of the diode D1, the cathode of the diode D2, and one end of the resistor R5; the positive power supply end of the amplifier T1 is connected to the +12V power output end; the negative power supply end of the amplifier T1 is connected to the -12V power output end; the output end of the amplifier T1 is simultaneously connected to the anode of the diode D4 and the cathode of the diode D3; The cathode of the diode D4 is simultaneously connected to the other end of the resistor R2, one end of the capacitor C1, and one end of the resistor R3; the other end of the resistor R3 is simultaneously connected to one end of the capacitor C2 and one end of the capacitor C3; The other end of the capacitor C1 is simultaneously connected to the other end of the capacitor C2 and the other end of the resistor R5, and is grounded, and the common end of the three is the second trigger end of the electric shock protector (7); The other end of the capacitor C3 is connected to one end of the resistor R4 and the inverting input end of the comparator L1; the non-inverting input end of the comparator L1 is connected to the moving end of the sliding rheostat RP; a fixed end of the sliding rheostat RP is connected to the +12V power output end; the positive power supply end of the comparator L1 is connected to the +12V power output end; the negative power supply end of the comparator L1 is connected to the -12V power output end; the output end of the comparator L1 is connected to the anode of the diode D5; and the cathode of the diode D5 is connected to one end of the resistor R6; The model of the controller U1 is PROG-110; Pin 1 of the controller U1 is connected to the positive power supply terminal of the speaker H1; Pin 5 of the controller U1 is connected to the other end of the resistor R6 and the cathode of the diode D6 at the same time; the anode of the diode D6 is connected to the other end of the resistor R4 and the other fixed end of the sliding resistor RP at the same time, and is grounded; Pin 6 of the controller U1 is connected to the anode of the diode D8; Connect pin 7 of controller U1 to one end of switch K1; Connect pin 8 of controller U1 to one end of switch K2; Connect pin 9 of controller U1 to one end of switch K3; Pin 10 of the controller U1 is connected to one end of the switch K4 and one end of the resistor R7; the other end of the resistor R7 is connected to the base of the transistor Q3; the emitter of the transistor Q3 is grounded; the collector of the transistor Q3 is connected to the negative power supply terminal of the speaker H1; Pin 19 of the controller U1 is connected to the negative terminal of the +5V power supply and grounded; Pin 20 of the controller U1 is connected to the positive terminal of the +5V power supply; The cathode of the diode D8 is simultaneously connected to one end of the resistor R9 and the base of the transistor Q1; the emitter of the transistor Q1 is connected to the base of the transistor Q2; the emitter of the transistor Q2 is connected to the other end of the resistor R9 and is grounded; the collector of the transistor Q1 is simultaneously connected to the collector of the transistor Q2 and the anode of the diode D7, and the connection end of the three is the first control end of the electric shock protector (7); The cathode of diode D7 is connected to one end of resistor R8; The other end of the resistor R8 is connected to the +15V power supply output end, and the connection end between the two is the second control end of the electric shock protector (7).

3. The adjustable electric shock protection smart energy meter according to claim 2, characterized in that: The model of the comparator L1 is: LM33; The model of the amplifier T1 is: UA741.

4. The adjustable electric shock protection smart energy meter according to claim 1, characterized in that: The delay time of controller U1 is set to 40 seconds.

5. The adjustable electric shock protection smart energy meter according to claim 1, characterized in that: The smart electric energy meter also includes a fuse (3); The fuse (3) is arranged on the base (1) and is located on the right side of the electric energy meter body (2); The live wire input end of the fuse (3) is connected to the live wire output end of the electric energy meter body (2); the neutral wire input end of the fuse (3) is connected to the neutral wire output end of the electric energy meter body (2); The two output ends of the fuse (3) are respectively the two output ends of the smart electric energy meter, and the two output ends of the fuse (3) are used to be connected to the two power supply ends of the electrical appliance.

6. The adjustable electric shock protection smart energy meter according to claim 1, characterized in that: The relay (4), the offset inductor (5), the current transformer (6) and the electric shock protector (7) are located on the left side of the electric energy meter body (2); and the electric shock protector (7) is arranged between the relay (4) and the electric energy meter body (2); and the offset inductor (5) and the current transformer (6) are arranged on a side of the relay (4) away from the incoming line terminal.

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