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CN-224233352-U - Power supply special for meter

CN224233352UCN 224233352 UCN224233352 UCN 224233352UCN-224233352-U

Abstract

The utility model relates to a special power supply for a meter, which comprises a cabinet body, wherein a mutual inductor for accessing alternating current is arranged in the cabinet body, the mutual inductor is respectively and electrically connected with an input end of a rectifier and an input end of a switching circuit, the rectifier is electrically connected with an energy accumulator, the energy accumulator comprises a battery pack A and a battery pack B which are independently powered, the voltage of the battery pack A is higher than that of the battery pack B, the charging capacity of the battery pack A is lower than that of the battery pack B, the battery pack A and the battery pack B are respectively and electrically connected with an inverter, and the inverter is electrically connected with the other input end of the switching circuit.

Inventors

  • LI JINRU
  • LI HUILONG
  • SHEN CHAOYING
  • GU HONGLEI
  • ZHANG LIANG

Assignees

  • 李慧龙

Dates

Publication Date
20260512
Application Date
20250529

Claims (10)

  1. 1. A special power supply for a meter is characterized by comprising a cabinet body (1), wherein a mutual inductor (4) connected with alternating current is arranged in the cabinet body (1), and the mutual inductor (4) is electrically connected with an input end of a rectifier (5) and an input end of a switching circuit (7) respectively; The rectifier (5) is electrically connected with the energy accumulator (6); the energy accumulator (6) comprises a battery group A (11) and a battery group B (12) which are independently powered; The voltage of the battery pack A (11) is higher than the voltage of the battery pack B (12); The charge capacity of the battery pack A (11) is lower than that of the battery pack B (12); The battery group A (11) and the battery group B (12) are respectively and electrically connected with an inverter (13); The inverter (13) is electrically connected with the other input end of the switching circuit (7); The switching circuit (7) is electrically connected with a meter (8) and a concentrator (9).
  2. 2. The special power supply for the meter according to claim 1, wherein the transformer (4) is connected to the low-voltage side of the transformer; The mutual inductor (4) comprises a current mutual inductor or a voltage mutual inductor; the concentrator (9) collects data of the meter (8) and uploads the data to the remote end (10).
  3. 3. The special power supply for the meter according to claim 2, wherein the output end of the selection switch (18) is electrically connected with the inverter (13), and the inverter (13) is electrically connected with the switching circuit (7).
  4. 4. The special power supply for the meter according to claim 3, wherein an output end of the battery pack B (12) is electrically connected with the battery pack A (11) through the diode D3; the energy accumulator (6) is electrically connected with the battery management system BMS; the battery pack A (11) is electrically connected with the controller (16) and the communication module (17) through the normally closed switch (15); the controller (16) is electrically connected with the remote end (10) through the communication module (17).
  5. 5. The power supply special for the meter according to claim 4, wherein the controller (16) is electrically connected with a relay (19) at the output end of the transformer (4), and the output end of the relay (19) is electrically connected with the input end of the rectifier (5) and one input end of the switching circuit (7).
  6. 6. The power supply for a meter according to claim 5, wherein the controller (16) is electrically connected to the selection switch (18) for switching the battery pack A (11) or the battery pack B (12).
  7. 7. The power supply special for the meter according to claim 5, wherein the selection switch (18) comprises a triode Q1, resistors RZ1, R2 and R3, a zener diode DZ3; The output end VCC1 of the battery pack A (11) is divided into two paths after passing through a resistor R3, one path is grounded through a resistor RZ1, and the other path is connected with the base electrode of a triode Q1; The output end VCC2 of the battery pack B (12) is connected with the collector electrode of the triode Q1; The emitter of the triode Q1 is electrically connected with the input end of the inverter (13) through a resistor R2; the output terminal VCC2 is electrically connected to the input terminal of the inverter (13) through the zener diode DZ 3.
  8. 8. The special power supply for the meter according to claim 5, wherein a hinge (14) is provided on the cabinet body (1) and is connected with the door plate (2); a lateral compression bar (3) is arranged on the door plate (2); The side compression bar (3) is arranged on a movable page of the hinge (14); a normally closed switch (15) is arranged in the cabinet body (1); When the cabinet body (1) is closed, the side pressure rod (3) is pressed on the normally closed switch (15) so that the normally closed switch (15) is opened; When the cabinet body (1) is opened, the side pressure rod (3) releases the normally closed switch (15), so that the normally closed switch (15) is closed.
  9. 9. The power supply special for the meter according to claim 5, wherein the switching circuit (7) is a manual switch switching circuit or an automatic switch switching circuit.
  10. 10. The special power supply for the meter according to claim 5, wherein the energy accumulator (6) is electrically connected with a photovoltaic panel.

Description

Power supply special for meter Technical Field The utility model relates to a special power supply for a meter. Background The power supply is stopped at the non-agricultural-row time of the agricultural-row transformer or intermittently, the background cannot be adjusted in time, the collection fails after the power failure of the concentrator or the ammeter, the statistical result of the background system is affected, and the management line loss does not reach the standard. And the high-voltage side of the transformer is powered by a voltage transformer, and the power is supplied to the concentrator and the meter after power supply conversion. For example patent cn201910425337.X. The prior art has the defects that 1) the high-voltage device is arranged, and the manufacturing cost is high. 2) The safety is low, and after the high-voltage device is broken down, secondary breakdown damage can be caused to the low-voltage device, and hidden danger exists for personal safety (a user does not know that the risk exists). 3) The voltage transformer is installed on the high-voltage side, power failure installation is needed, installation is inconvenient, and an operation ticket is needed to be opened. 4) The problem of data uploading during short-time power failure of the farm transformer cannot be guaranteed. Disclosure of utility model Based on the problems, the utility model discovers that the common power supply is used in the improvement process, but the risk of potential safety hazard of equipment and personal electric shock is caused by electricity stealing. The technical problem to be solved by the utility model is to provide a special power supply for a meter in general. In order to solve the problems, the utility model adopts the following technical scheme: A special power supply for a meter comprises a cabinet body, wherein a mutual inductor connected with alternating current is arranged in the cabinet body, and the mutual inductor is electrically connected with an input end of a rectifier and an input end of a switching circuit respectively; The rectifier is electrically connected with the energy accumulator; the energy accumulator comprises a battery pack A and a battery pack B which are independently powered; the voltage of the battery pack a is higher than the voltage of the battery pack B; The charge capacity of the battery pack A is lower than that of the battery pack B; the battery pack A and the battery pack B are respectively and electrically connected with an inverter; The inverter is electrically connected with the other input end of the switching circuit; the switching circuit is electrically connected with the meter gauge and the concentrator. As a further improvement of the above technical scheme: The transformer is connected to the low-voltage side of the transformer; the mutual inductor comprises a current mutual inductor or a voltage mutual inductor; The concentrator collects data of the meter and uploads the data to the remote end. The output end of the selection switch is electrically connected with the inverter which is electrically connected with the switching circuit. The output end of the battery pack B is electrically connected with the battery pack A through a diode D3; the energy accumulator is electrically connected with the battery management system BMS; The battery pack A is electrically connected with the controller and the communication module through the normally-closed switch; the controller is electrically connected with the far end through the communication module. The controller is electrically connected with the relay at the output end of the transformer, and the output end of the relay is electrically connected with the input end of the rectifier and one input end of the switching circuit. The controller is electrically connected with the selection switch and is used for switching the battery pack A or the battery pack B. The selection switch comprises a triode Q1, resistors RZ1, R2 and R3, a zener diode DZ3; The output end VCC1 of the battery pack A is divided into two paths after passing through a resistor R3, one path is grounded through a resistor RZ1, and the other path is connected with the base electrode of a triode Q1; The output end VCC2 of the battery pack B is connected with the collector electrode of the triode Q1; The emitter of the triode Q1 is electrically connected with the input end of the inverter through a resistor R2; The output VCC2 is electrically connected to the inverter input via a zener diode DZ 3. A door plate is connected to the cabinet body through a hinge; A side compression bar is arranged on the door plate; the side compression bar is arranged on the movable page of the hinge; a normally closed switch is arranged in the cabinet body; when the cabinet body is closed, the side pressure rod is pressed on the normally closed switch, so that the normally closed switch is opened; when the cabinet body is opened, the side pressure rod is lo