CN217820777U - Electric leakage indicating device of electrical equipment - Google Patents
Electric leakage indicating device of electrical equipment Download PDFInfo
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- CN217820777U CN217820777U CN202220500656.XU CN202220500656U CN217820777U CN 217820777 U CN217820777 U CN 217820777U CN 202220500656 U CN202220500656 U CN 202220500656U CN 217820777 U CN217820777 U CN 217820777U
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- electric leakage
- leakage
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- indication
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Abstract
The utility model provides an electrical equipment's electric leakage indicating device, includes casing, electric leakage indication post, spring, electro-magnet, push rod and electric leakage detection control circuit, electric leakage indication post slidable mounting is in the indication post guide way in the casing, and electric leakage indication post's one end is exposed from the electric leakage indication hole, and the other end is equipped with the trip, spring mounting is on electric leakage indication post, and the elasticity of spring makes electric leakage indication post outwards remove, electro-magnet and push rod are installed in the casing and the axis of the two is perpendicular with electric leakage indication post, and the one end of push rod is connected with the armature of electro-magnet, and the other end is equipped with the dop corresponding with the trip, and the control coil and the electric leakage detection control circuit of electro-magnet are connected. The utility model discloses utilize spring, electro-magnet and push rod to make the position of electric leakage instruction post change when electric leakage trouble takes place for equipment, when electrical equipment dropout, whether the maintenance personal can the reason of snap judgments dropout be electric leakage trouble through the position of observing electric leakage instruction post to equipment maintenance efficiency has been improved.
Description
Technical Field
The utility model relates to an electric leakage indicating device for low pressure electrical equipment belongs to signal device technical field.
Background
At present, many low-voltage electrical equipment are not provided with an electric leakage indicating device, and when the equipment breaks down and causes the breaker to open, maintenance personnel can hardly judge the equipment in time
Whether the cause of the trip is a leakage fault. This causes a certain difficulty in maintenance of the electrical equipment, and reduces the maintenance efficiency of the equipment. Although some low-voltage electrical equipment is provided with a leakage indicator, the existing leakage indicator is generally complex in structure, so that the manufacturing cost is high, and the operation reliability is poor, so that improvement is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the drawback of prior art, provide an electrical equipment electric leakage indicating device that low in manufacturing cost, reliability are high, make maintenance personal can investigate electric leakage trouble fast, improve equipment maintenance efficiency, in addition, it is also supporting with current low pressure electrical equipment easily.
The problem of the utility model is solved with following technical scheme:
the utility model provides an electrical equipment's electric leakage indicating device, includes casing, electric leakage indication post, spring, electro-magnet, push rod and electric leakage detection control circuit, electric leakage indication post slidable mounting is in the indication post guide way in the casing, and electric leakage indication post's one end is exposed from the electric leakage indication hole, and the other end is equipped with the trip, spring mounting is on electric leakage indication post, and the elasticity of spring makes electric leakage indication post outwards remove, electro-magnet and push rod are installed in the casing and the axis of the two is perpendicular with electric leakage indication post, and the one end of push rod is connected with the armature of electro-magnet, and the other end is equipped with the dop corresponding with the trip, and the control coil and the electric leakage detection control circuit of electro-magnet are connected.
Above-mentioned electrical equipment's electric leakage indicating device, the spring is pressure spring and its axis is parallel with electric leakage indication post, one side of electric leakage indication post is equipped with the branch pillar, one side that branch post is close to the trip is equipped with the boss, and the one end top of spring is on this boss, and the other end top is on the reference column in the electrical equipment shell.
The electric leakage indicating device of the electrical equipment comprises an electric leakage detection circuit and a control circuit, wherein the control circuit comprises a control chip, a rectifier bridge, a silicon controlled rectifier, an energy storage capacitor and a pre-charging resistor, the electric leakage detection circuit measures the zero sequence current of the electrical equipment, the signal output end of the electric leakage detection circuit is connected with the electric leakage signal input end of the control chip, the alternating current input end of the rectifier bridge is connected with the power voltage of the electrical equipment, one end of a control coil of an electromagnet is connected with the direct current output end of the rectifier bridge, the other end of the control coil of the electromagnet is charged for the energy storage capacitor through the pre-charging resistor and is grounded through the silicon controlled rectifier, the positive electrode of the energy storage capacitor is connected with the power end of the control chip, and the gate electrode of the silicon controlled rectifier is connected with the output end of the control chip.
According to the electric leakage indicating device of the electrical equipment, the electric leakage detection circuit comprises the zero sequence mutual inductor, the current detection resistor and the coupling resistor, the annular iron core of the zero sequence mutual inductor is sleeved on the power line, two ends of the secondary coil are respectively connected with two ends of the current detection resistor, and output voltages at two ends of the current detection resistor are connected with the electric leakage signal input end of the control chip through the coupling resistor.
In the leakage indicating device of the electrical equipment, the current detection resistor is connected in parallel with the bidirectional clamping diode and the high-frequency bypass capacitor.
In the electric leakage indicating device of the electrical equipment, the electric leakage signal input end of the control chip is connected with the anti-interference capacitor.
The electric leakage detection control circuit further comprises an electric leakage test button and a test resistor, a test coil is wound on the annular iron core of the zero sequence transformer, and the test coil is connected with the electric leakage test button and the test resistor in series and then connected with the power supply voltage of the electric equipment.
Advantageous effects
The utility model discloses utilize spring, electro-magnet and push rod to make the position of electric leakage instruction post change when equipment takes place electric leakage trouble, when equipment is threaded off, whether the maintenance personal can the reason of snap judgments dropout be electric leakage trouble through the position of observing electric leakage instruction post to equipment maintenance efficiency has been improved. Furthermore, the utility model discloses still have advantages such as simple structure is compact, simple to operate, low cost, action are reliable.
Drawings
The present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a state of the leakage indication portion in fig. 1 after a leakage fault;
fig. 3a and 3b are front and left views of the leakage indication pillar, respectively;
FIG. 4 is a schematic structural view of the push rod;
fig. 5 is a schematic layout view of a leakage indicating hole, an indicating post guide groove and a push rod guide groove in a housing;
fig. 6 is an electrical schematic diagram of the present invention.
In the drawings, the reference numerals denote: 1. leakage indicating post, 2, spring, 3, electromagnet, 4, push rod, 5, circuit board, 6, zero sequence mutual inductor, 7, casing, 8, leakage indicating hole, 9, leakage test button hole, 10, indicating post guide way, 11, push rod guide way, 12, reference column, 21, branch pillar, 22, trip, 31, push rod trip hole, 32, dop, U1, control chip, T, leakage test button, Q1, rectifier bridge, SCR1, silicon controlled rectifier, E1, energy storage capacitor, D1, bidirectional clamping diode, C1, high frequency bypass capacitor, C2, anti-interference capacitor, R1, pre-charge resistor, R2, test resistor, RP, coupling resistor, RL, current detection resistor, L, the control coil of electromagnet.
Detailed Description
The utility model discloses to prior art's drawback, provide an electrical equipment's electric leakage indicating device, mainly be applied to low pressure power switch system, have simple structure, assembly efficiency is high, and is with low costs, advantages such as reliability height.
Referring to fig. 1-6, the structure of the present invention is schematically illustrated, and the present invention mainly includes a leakage indicating post 1, a spring 2, an electromagnet 3, a push rod 4, and a leakage detecting control circuit.
Referring to fig. 3a, fig. 3b, fig. 4 and fig. 5, the casing of the present invention is provided with a leakage indicating hole 8, and an indicating column guide slot 10 is arranged inside the casing, the leakage indicating hole 8 and the indicating column guide slot 10 guide the movement of the leakage indicating column 1, and the leakage indicating hole 8 is also used for observing the position of the leakage indicating column 1; the branch pillar 21 is arranged on one side of the electric leakage indication pillar 1, the boss is arranged on the branch pillar and used for installing the spring 2, and the clamping hook 22 is arranged at one end, located in the shell, of the electric leakage indication pillar 1 and used for clamping the push rod 4.
The electric leakage indication column 1 can slide along the electric leakage indication hole 8 and the indication column guide groove 10 under the action of external force, the push rod 4 is installed in the shell and is perpendicular to the electric leakage indication column 1, one end of the push rod 4 is connected with the armature of the electromagnet 3, the other end of the push rod is provided with a clamping head 32, the clamping head 32 can be clamped into a clamping hook 22 at the end part of the electric leakage indication column 1, and the electric leakage indication column 1 cannot move outwards. The spring 2 is installed between the positioning post 12 and the branch post 21 of the leakage indication post 1, and its elastic force makes the leakage indication post 1 move outward. The indication post guide groove 10 can prevent the electric leakage indication post 1 from deflecting, and improve the reliability of the indication part.
The push rod 4 can slide in the push rod guide groove 11 under the thrust action of the electromagnet. The push rod guide groove 11 can prevent the push rod 4 from deflecting, and the reliability of the electric leakage indicating device is improved.
The electromagnet 3 is used for driving the push rod 4 to move, and when the leakage current detection control circuit detects that leakage current exists in the circuit, a control signal is output to the electromagnet 3 to enable the electromagnet 3 to act.
Referring to fig. 6, the utility model discloses a leakage detection control circuit mainly includes control chip U1, zero sequence transformer 6, electric leakage test button T, rectifier bridge Q1, silicon controlled rectifier SCR1, energy storage capacitor E1, two-way clamp diode D1, high frequency bypass electric capacity C1, pre-charge resistance R1, test resistance R2, coupling resistance RP, current detection resistance RL. The zero sequence transformer 6, the bidirectional clamping diode D1, the high-frequency bypass capacitor C1, the coupling resistor RP and the current detection resistor RL are used for detecting leakage current; the rectifier bridge Q1 can convert alternating current into direct current to supply power to the control chip U1 and the electromagnet 3; the thyristor SCR1 is a driving part of the electromagnet 3.
The utility model discloses except that zero sequence mutual inductor 6, electric leakage test button T, other spare parts of electric leakage detection control circuit all install on circuit board 5.
When the low-voltage electrical equipment operates, the input end of the rectifier bridge Q1 obtains 220V alternating voltage, and the output end of the rectifier bridge Q1 charges the energy storage capacitor E1 through the control coil L of the electromagnet and the pre-charging resistor R1. Due to the current limiting function of the precharge resistor R1, the charging current is small, and the electromagnet 3 cannot be operated. When the voltage of the energy storage capacitor E1 reaches the working voltage of the control chip U1, the control chip U1 starts to work. When a circuit has an electric leakage fault, a secondary side coil of the zero sequence transformer 6 generates current, the current is converted into a voltage signal by a current detection resistor RL, then the voltage signal is sent to an electric leakage signal input end of a control chip U1 through a coupling resistor RP, the control chip U1 enables a silicon controlled rectifier SCR1 to be conducted, then a larger direct current flows in a control coil L of an electromagnet, the electromagnet 3 acts, and a maintenance worker is prompted that the reason for tripping the circuit breaker at this time is the electric leakage fault.
The utility model discloses be applied to low voltage power system, its working process is: under normal conditions, the dop 32 of push rod 4 tip is gone into the trip 22 of electric leakage indication post 1 one end, and the outer end of electric leakage indication post 1 is parallel and level with electrical equipment's surface. When electrical equipment has an electric leakage fault, the electromagnet 3 acts under the drive of an electric leakage detection control circuit, the push rod 4 slides along the push rod guide groove 11 under the thrust action of the electromagnet 3, the clamping head 32 at the end part of the push rod 4 moves towards the direction far away from the electric leakage indication column 1, after the clamping head 32 is separated from the clamping hook 22 at the end part of the electric leakage indication column 1, the electric leakage indication column 1 moves towards the outside of the circuit breaker along the electric leakage indication hole 8 and the indication column guide groove 10 under the elastic action of the spring 2 until the clamping hook 22 clamps the thin middle part of the electric leakage indication column 1, at the moment, the outer end of the electric leakage indication column 1 is higher than the outer surface of the electrical equipment, and whether the reason for tripping the low-voltage electrical equipment is the electric leakage fault or not can be judged by observing the position change of the electric leakage indication column 1. After the fault is eliminated, the electric leakage indicating column 1 is pressed down, the push rod 4 automatically resets under the action of the reset spring of the electromagnet 3, and the electric equipment can be reused.
Claims (7)
1. The utility model provides an electrical equipment's electric leakage indicating device, characterized by, including casing, electric leakage indication post (1), spring (2), electro-magnet (3), push rod (4) and electric leakage detection control circuit, in indication post guide way (10) of electric leakage indication post (1) slidable mounting in the casing, the one end of electric leakage indication post (1) is exposed from electric leakage indication hole (8), and the other end is equipped with trip (22), install on electric leakage indication post (1) spring (2), and the elasticity of spring (2) makes electric leakage indication post (1) outwards move, electro-magnet (3) and push rod (4) are installed in the casing and the axis of the two is perpendicular with electric leakage indication post (1), and the one end of push rod (4) is connected with the armature of electro-magnet (3), and the other end is equipped with dop (32) corresponding with trip (22), and control coil (L) and electric leakage detection control circuit of electro-magnet are connected.
2. The leakage indicator of electrical equipment according to claim 1, wherein the spring (2) is a compression spring and has an axis parallel to the leakage indicating column (1), a branch column (21) is provided on one side of the leakage indicating column (1), a boss is provided on one side of the branch column (21) close to the hook (22), one end of the spring (2) abuts against the boss, and the other end abuts against the positioning column (12) in the housing of the electrical equipment.
3. The leakage indicator of electrical equipment according to claim 1 or 2, wherein the leakage detection control circuit comprises a leakage detection circuit and a control circuit, the control circuit comprises a control chip (U1), a rectifier bridge (Q1), a silicon controlled rectifier (SCR 1), an energy storage capacitor (E1), and a pre-charge resistor (R1), the leakage detection circuit measures a zero sequence current of the electrical equipment, a signal output end of the leakage detection circuit is connected with a leakage signal input end of the control chip (U1), an alternating current input end of the rectifier bridge (Q1) is connected with a power supply voltage of the electrical equipment, one end of a control coil (L) of the electromagnet is connected with a direct current output end of the rectifier bridge (Q1), the other end of the control coil charges the energy storage capacitor (E1) through the pre-charge resistor (R1) and is grounded through the silicon controlled rectifier (SCR 1), an anode of the energy storage capacitor (E1) is connected with a power supply terminal of the control chip (U1), and a gate of the silicon controlled rectifier (SCR 1) is connected with an output end of the control chip (U1).
4. The leakage indicator of electrical equipment according to claim 3, wherein the leakage detection circuit comprises a zero sequence transformer (6), a current detection Resistor (RL) and a coupling Resistor (RP), wherein an annular iron core of the zero sequence transformer (6) is sleeved on the power line, two ends of the secondary coil are respectively connected with two ends of the current detection Resistor (RL), and output voltages at two ends of the current detection Resistor (RL) are connected with a leakage signal input end of the control chip (U1) through the coupling Resistor (RP).
5. The leakage indicator according to claim 4, wherein a bidirectional clamping diode (D1) and a high-frequency bypass capacitor (C1) are connected in parallel to the current detection Resistor (RL).
6. The leakage indicator of electrical equipment according to claim 5, wherein the leakage signal input terminal of the control chip (U1) is connected with an anti-interference capacitor (C2).
7. The leakage indicator of electrical equipment according to claim 6, wherein the leakage detection control circuit further comprises a leakage test button (T) and a test resistor (R2), the toroidal core of the zero sequence transformer (6) is wound with a test coil, and the test coil is connected in series with the leakage test button (T) and the test resistor (R2) and then connected to the power supply voltage of the electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220500656.XU CN217820777U (en) | 2022-03-09 | 2022-03-09 | Electric leakage indicating device of electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220500656.XU CN217820777U (en) | 2022-03-09 | 2022-03-09 | Electric leakage indicating device of electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217820777U true CN217820777U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220500656.XU Active CN217820777U (en) | 2022-03-09 | 2022-03-09 | Electric leakage indicating device of electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217820777U (en) |
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2022
- 2022-03-09 CN CN202220500656.XU patent/CN217820777U/en active Active
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