CN214750501U - Prevent to take accuse device CT circuit that bursts - Google Patents

Abstract

The utility model discloses a circuit for preventing charge control device CT from bursting, which belongs to the field of power equipment charge control devices, and comprises a charge control electric energy meter, wherein a three-phase four-wire electronic electric energy meter is fixedly arranged at the inner end of the charge control electric energy meter, and is characterized in that a protection circuit 502 is arranged, so that when the charge control device is assembled and replaced with the meter, if a wiring error occurs, the wiring error can be displayed through a display lamp, the circuit and the CT from being burnt and cracked can not occur after the power on and the power on of the equipment, meanwhile, when the wiring is correct after the meter is assembled and replaced, the protection circuit 502 does not influence the normal work of the equipment, the protection circuit 502 automatically disconnects a circuit power supply circuit and indicates that a corresponding circuit has faults before the wiring error causes the short circuit fault CT from being burst, the assembly of the protection circuit 502 can avoid the circuit and the electric power device from being burnt and cause major safety accidents, is beneficial to safety production and guarantees the personal safety of field construction personnel.

Description

Prevent to take accuse device CT circuit that bursts

Technical Field

The utility model relates to a power equipment takes accuse device field, and more specifically says, relates to a prevent to take accuse device CT circuit that bursts.

Background

The charge control electric energy meter (suitable for low-voltage users) is an intelligent single meter which has the functions of electric energy metering, charge control charging, electric quantity freezing, balance alarming and the like and can realize remote automatic acquisition of electric quantity information data. When the cost control device of the electric power equipment is not installed, the electric energy meter needs to be additionally installed at the position where the electric energy meter is not installed, and the cost control device needs to be installed and replaced.

However, when a meter is installed, a worker is easy to have the situation that the voltage and current lines in the lines are connected in a wrong way, a protection device is not added in a secondary side line power supply line of the conventional charge control device, and when the equipment is electrified to work under the situation that the wiring errors are not eliminated, the problems of secondary side line burnout, CT burst, line burnout, accident caused by line burnout, personal safety and the like occur. Therefore, a circuit for preventing the cost control device CT from bursting is provided to solve the problem.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

Problem to exist among the prior art, an object of the utility model is to provide a prevent to take accuse device CT circuit that bursts, characterized by is through setting up protection circuit, if appear the wiring mistake and show through the display lamp when making to take accuse device dress table to trade the table, and can not appear burning out the circuit after the electricity power on equipment is started, the condition that CT bursts, simultaneously when the dress table, trade behind the table wiring after correct back, protection circuit does not influence equipment normal work, protection circuit will break off circuit power supply circuit and indicate that there is the trouble in corresponding circuit by oneself before the wiring mistake causes short-circuit fault CT to burst and takes place, the circuit can be avoided in protection circuit's assembly, electric power device burns out and causes major safety accident to take place, be of value to safety in production and guarantee site constructor's personal safety.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a prevent expense accuse device CT circuit that bursts, includes expense accuse electric energy meter, expense accuse electric energy meter inner fixed mounting has three-phase four-wire electronic type electric energy meter, expense accuse electric energy meter inner fixed mounting has special change collection terminal, three-phase four-wire electronic type electric energy meter lower extreme electric connection has three-phase four-wire electric energy measurement to unite the terminal box, three-phase four-wire electric energy measurement unite terminal box lower extreme fixed mounting has first fault indication device, first fault indication device establishes ties has second fault indication device, second fault indication device establishes ties has third fault indication device, expense accuse electric energy meter inner fixed mounting has high-voltage vacuum circuit breaker, high-voltage vacuum circuit breaker below fixed mounting has small-size auxiliary relay, small-size auxiliary relay below fixed mounting has change over switch.

Furthermore, the lower end of the first fault indicating device is also electrically connected with a current transformer, and the current transformer is electrically connected with the high-voltage vacuum circuit breaker in a connecting mode, so that fault current information can be provided conveniently when a circuit fault occurs.

Furthermore, first fault indication device includes the fault indicator lamp, fault indicator lamp electric connection has protection circuit, and second fault indication device and third fault indication device and first fault indication device phase-match are convenient for discern the trouble according to the pilot lamp.

Furthermore, high-pressure vacuum circuit breaker electric connection has the separating brake pilot lamp, and high-pressure vacuum circuit breaker still is connected with the combined floodgate pilot lamp, is convenient for carry out combined floodgate and separating brake operation according to the pilot lamp.

Furthermore, an indication lamp allowing switching-on is fixedly installed at the outer end of the change-over switch, and a button switch is further fixedly installed at the outer end of the change-over switch, so that the device can be switched on conveniently.

Furthermore, the connection mode of change over switch lower extreme and special transformer acquisition terminal is electric connection, and special transformer acquisition terminal outer end fixed mounting has small-size auxiliary relay, is convenient for control a plurality of circuits simultaneously.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) this scheme is through setting up protection circuit for if the wiring error appears and can show through the display lamp when taking accuse device dress table to trade the table, and can not appear burning out the circuit after the equipment power-on starts, the condition that CT bursts, simultaneously when the dress table, trade the correct back of wiring after the table, protection circuit does not influence equipment normal work, protection circuit will break off circuit power supply circuit and indicate that there is the trouble in the corresponding circuit by oneself before the wiring error causes short-circuit fault CT to burst to take place, protection circuit's assembly can avoid the circuit, the electric power device burns out and causes major safety accident to take place, be of value to safety in production and guarantee site constructor's personal safety.

(2) The lower end of the first fault indicating device is also electrically connected with a current transformer, and the current transformer is electrically connected with the high-voltage vacuum circuit breaker in a connecting mode, so that fault current information can be provided conveniently when a circuit fault occurs.

(3) First fault indication device includes the fault indicator lamp, and fault indicator lamp electric connection has protection circuit, and second fault indication device and third fault indication device and first fault indication device phase-match are convenient for distinguish the trouble according to the pilot lamp.

(4) The high-voltage vacuum circuit breaker is electrically connected with a switching-off indicator lamp, and the high-voltage vacuum circuit breaker is further connected with a switching-on indicator lamp, so that switching-on and switching-off operations can be conveniently carried out according to the indicator lamp.

(5) An indication lamp allowing closing is fixedly installed at the outer end of the change-over switch, a button switch is further fixedly installed at the outer end of the change-over switch, and the device can be conveniently closed.

(6) The connected mode of change over switch lower extreme and special transformer acquisition terminal is electric connection, and special transformer acquisition terminal outer end fixed mounting has small-size auxiliary relay, is convenient for a plurality of circuits of simultaneous control.

Drawings

Fig. 1 is a schematic diagram of the overall internal circuit structure of the present invention;

fig. 2 is a schematic diagram of the switching circuit structure of the present invention;

fig. 3 is a schematic diagram of an internal circuit structure of the fault indicating device of the present invention.

The reference numbers in the figures illustrate:

1. a charge control electric energy meter; 2. a three-phase four-wire electronic electric energy meter; 3. a special transformer acquisition terminal; 4. a three-phase four-wire electric energy metering combined junction box; 5. a first fault indication device; 501. a fault indicator light; 502. a protection circuit; 6. a second fault indication device; 7. a third fault indication device; 8. a high voltage vacuum circuit breaker; 9. a small-sized intermediate relay; 10. a transfer switch; 11. a brake-off indicator light; 12. a switch-on indicator light; 13. an indication lamp allowing closing; 14. a push button switch; 15. a current transformer.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-3, a circuit for preventing a charge control device CT from bursting includes a charge control electric energy meter 1, a three-phase four-wire electronic electric energy meter 2 is fixedly mounted at the inner end of the charge control electric energy meter 1, a special transformer acquisition terminal 3 is fixedly mounted at the inner end of the charge control electric energy meter 1, a three-phase four-wire electric energy metering combined junction box 4 is electrically connected to the lower end of the three-phase four-wire electronic electric energy meter 2, a first fault indicating device 5 is fixedly mounted at the lower end of the three-phase four-wire electric energy metering combined junction box 4, a second fault indicating device 6 is connected in series with the first fault indicating device 5, a third fault indicating device 7 is connected in series with the second fault indicating device 6, a high-voltage vacuum circuit breaker 8 is fixedly mounted at the inner end of the charge control electric energy meter 1, a small intermediate relay 9 is fixedly mounted below the high-voltage vacuum circuit breaker 8, and a change-over switch 10 is fixedly mounted below the small intermediate relay 9.

Referring to fig. 1-3, the lower end of a first fault indicating device 5 is further electrically connected with a current transformer 15, the current transformer 15 is electrically connected with a high voltage vacuum circuit breaker 8 in a manner of providing fault current information when a circuit fault occurs, the first fault indicating device 5 includes a fault indicating lamp 501, the fault indicating lamp 501 is electrically connected with a protection circuit 502, and a second fault indicating device 6 and a third fault indicating device 7 are matched with the first fault indicating device 5 to distinguish the fault according to the indicating lamp, the high voltage vacuum circuit breaker 8 is electrically connected with a trip indicating lamp 11, the high voltage vacuum circuit breaker 8 is further connected with a switch-on indicating lamp 12 to perform switch-on and switch-off operations according to the indicating lamp, a switch-on permitting indicating lamp 13 is fixedly installed at the outer end of a transfer switch 10, a button switch 14 is also fixedly installed at the outer end of the transfer switch 10 to perform switch-on operations on the device conveniently, the connection mode of change over switch 10 lower extreme and special change acquisition terminal 3 is electric connection, and special change acquisition terminal 3 outer end fixed mounting has small-size auxiliary relay 9, is convenient for control a plurality of circuits simultaneously.

Referring to fig. 1-3, when the input voltage of the device enters the circuit, the current passes through the protective tube for the operation of the subsequent circuit, when the subsequent circuit is short-circuited due to meter replacement and wiring error, the protective tube disconnects the power supply circuit, at this time, there is a voltage difference between the two ends of the protective tube, and the current drives the indicator lamp through the indicator lamp to light and indicate that the circuit of the disconnected power supply circuit is abnormal, then according to the indication of the corresponding indicator lamp, after checking and correcting the error circuit, the electrical circuit recovers the normal power supply, and the corresponding fault indicator lamp is not on, so as to complete a series of operations using the device, through setting the protection circuit 502, if the wiring error occurs during the meter installation and the table replacement of the cost control device, the circuit can not be burned and the CT is not burst after the device is powered on, and meanwhile, after the wiring is correct after the meter installation and the table replacement, the protection circuit 502 does not affect the normal operation of the device, when a short-circuit fault CT burst caused by a wiring error occurs, the protection circuit 502 automatically disconnects a circuit power supply loop and indicates that a fault exists in a corresponding circuit, the protection circuit 502 is assembled to avoid the circuit and the power device from being burnt and cause major safety accidents, and the safety production is facilitated and the personal safety of field construction personnel is guaranteed.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims (6)

1. A circuit for preventing cost control device CT burst comprises a cost control electric energy meter (1), and is characterized in that: the inner end of the charge control electric energy meter (1) is fixedly provided with a three-phase four-wire electronic electric energy meter (2), the inner end of the charge control electric energy meter (1) is fixedly provided with a special transformer acquisition terminal (3), the lower end of the three-phase four-wire electronic electric energy meter (2) is electrically connected with a three-phase four-wire electric energy metering combined junction box (4), a first fault indicating device (5) is fixedly arranged at the lower end of the three-phase four-wire electric energy metering combined junction box (4), the first fault indicating device (5) is connected with a second fault indicating device (6) in series, the second fault indicating device (6) is connected with a third fault indicating device (7) in series, the inner end of the charge control electric energy meter (1) is fixedly provided with a high-voltage vacuum circuit breaker (8), a small-sized intermediate relay (9) is fixedly arranged below the high-voltage vacuum circuit breaker (8), a transfer switch (10) is fixedly arranged below the small intermediate relay (9).

2. The circuit of claim 1, wherein the circuit for preventing the cost control device CT from bursting comprises: the lower end of the first fault indicating device (5) is also electrically connected with a current transformer (15), and the current transformer (15) is electrically connected with the high-voltage vacuum circuit breaker (8).

3. The circuit of claim 1, wherein the circuit for preventing the cost control device CT from bursting comprises: first fault indication device (5) are including fault indicator lamp (501), fault indicator lamp (501) electric connection has protection circuit (502), and second fault indication device (6) and third fault indication device (7) and first fault indication device (5) phase-match.

4. The circuit of claim 1, wherein the circuit for preventing the cost control device CT from bursting comprises: the high-voltage vacuum circuit breaker (8) is electrically connected with a switching-off indicator lamp (11), and the high-voltage vacuum circuit breaker (8) is further connected with a switching-on indicator lamp (12).

5. The circuit of claim 1, wherein the circuit for preventing the cost control device CT from bursting comprises: an indication lamp (13) allowing closing is fixedly installed at the outer end of the change-over switch (10), and a button switch (14) is also fixedly installed at the outer end of the change-over switch (10).

6. The circuit of claim 1, wherein the circuit for preventing the cost control device CT from bursting comprises: the lower end of the change-over switch (10) is electrically connected with the special transformer acquisition terminal (3), and a small intermediate relay (9) is fixedly mounted at the outer end of the special transformer acquisition terminal (3).

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