Search

CN-122025392-A - Open-circuit-preventing low-voltage combined transformer

CN122025392ACN 122025392 ACN122025392 ACN 122025392ACN-122025392-A

Abstract

The invention discloses an open-circuit-preventing type low-voltage combined transformer, which particularly relates to the technical field of transformers, and comprises a shell, wherein a mounting plate is arranged in the shell, a current transformer, a voltage transformer and an open-circuit protector are fixedly arranged at the top of the mounting plate, a plurality of equally-spaced connection ports are arranged at the tops of two sides of the shell, the utility model discloses a mounting panel, including mounting panel, connecting plate and connecting plate are fixed to the mounting panel rear end has been seted up a plurality of equidistant round holes that distribute, and every round hole front end inner wall is all fixed and is equipped with compression spring, compression spring rear end is fixed and is equipped with the connecting plate, the same spread groove with connecting plate quantity has been seted up to the casing rear end inner wall, the connecting plate is fixed inside the spread groove. According to the invention, the current transformer, the voltage transformer and the open-circuit protector are integrated on the mounting plate, so that the high-voltage danger generated by secondary open-circuit of the transformer circuit is effectively avoided, the running safety of equipment is improved, meanwhile, the mounting plate can be pulled, and is pushed by the compression spring, the disassembly and the installation are convenient, and the element overhaul and the element replacement are greatly facilitated.

Inventors

  • FU DONGDONG

Assignees

  • 保定瑞科电气科技有限公司

Dates

Publication Date
20260512
Application Date
20260204

Claims (9)

  1. 1. The anti-open-circuit low-voltage combined transformer comprises a shell (1) and is characterized in that a mounting plate (2) is arranged in the shell (1), a current transformer (3), a voltage transformer (4) and an open-circuit protector (5) are fixedly arranged at the top of the mounting plate (2), and a plurality of equally-spaced connecting ports (6) are formed at the tops of two sides of the shell (1); The rear end of the mounting plate (2) is provided with a plurality of equidistant round holes (7), the inner wall of the front end of each round hole (7) is fixedly provided with a compression spring (8), the rear end of each compression spring (8) is fixedly provided with a connecting plate (9), the inner wall of the rear end of the shell (1) is provided with connecting grooves (10) the number of which is the same as that of the connecting plates (9), and the connecting plates (9) are fixed in the connecting grooves (10); the top of the front end of the shell (1) is provided with a mounting groove (11), and a start-stop control mechanism (12) is fixedly arranged in the mounting groove (11).
  2. 2. The anti-open-circuit low-voltage combined transformer according to claim 1, wherein the start-stop control mechanism (12) comprises a circuit switch (121) fixed in a mounting groove (11), a poking plate (122) is arranged at the front end of the circuit switch (121), a circular groove (123) is arranged at the top of the mounting groove (11), a motor (124) is fixedly arranged in the circular groove (123), the top of the motor (124) penetrates through the top of the shell (1) and extends to the outer side of the shell (1), a rotating rod (125) is fixedly arranged at the bottom of an output shaft of the motor (124), a poking rod (126) is fixedly arranged at the bottom of the rotating rod (125), and the poking plate (122) is rotationally poked by the poking rod (126).
  3. 3. The open-circuit-preventing low-voltage combined transformer according to claim 1, wherein sliding grooves (13) are formed in two sides of the bottom of the mounting plate (2), sliding blocks (14) matched with the sliding grooves (13) are fixedly arranged on the inner wall of the bottom of the shell (1), and the sliding blocks (14) are arranged in the sliding grooves (13).
  4. 4. The open-circuit-preventing low-voltage combined transformer according to claim 1, wherein a groove (15) is formed in the center of the front end of the mounting plate (2), and a handle (16) is fixedly arranged in the groove (15).
  5. 5. The anti-open-circuit low-voltage combined transformer according to claim 1, wherein an access hole (17) is formed in the front end of the shell (1), a baffle plate (18) is hinged inside the access hole (17), the baffle plate (18) is locked with the shell (1) through a lock, a controller (19) is fixedly embedded in the front end of the baffle plate (18), and the controller (19) is provided with a display screen and a remote communication module.
  6. 6. The open-circuit prevention type low-voltage combined transformer according to claim 5, wherein a current sensor (20) and a voltage sensor (21) which are distributed front and back are clamped at the top of the mounting plate (2), and a temperature sensor (22) is fixedly embedded in the inner wall of the baffle plate (18).
  7. 7. The anti-open-circuit low-voltage combined transformer according to claim 1, wherein a clamping interface (23) is formed at the rear end of the shell (1) and is used for being clamped with a guide rail, radiating ports (24) are formed in two sides of the shell (1) and the inner wall of the clamping interface (23), a filter screen (25) is fixedly arranged in each radiating port (24), a radiating fan (26) is fixedly arranged in the radiating ports (24) located on two sides of the shell (1), and the radiating fan (26) is arranged on the inner side of the filter screen (25).
  8. 8. The open-circuit-preventing low-voltage combined transformer according to claim 1, wherein an adjusting groove (27) is formed in the bottom of the shell (1), a reinforcing block (28) is arranged in the adjusting groove (27), two symmetrically distributed fastening bolts (29) are connected with the bottom of the reinforcing block (28) in a threaded mode, and the top ends of the fastening bolts (29) are abutted to the inner wall of the adjusting groove (27).
  9. 9. The open-circuit-preventing low-voltage combined transformer according to claim 8, wherein a plurality of equally-spaced fixing grooves (30) are formed in the front end of the shell (1) and the front end of the reinforcing block (28), and fixing holes (31) are formed in the inner wall of each fixing groove (30).

Description

Open-circuit-preventing low-voltage combined transformer Technical Field The invention relates to the technical field of transformers, in particular to an open-circuit-preventing low-voltage combined transformer. Background The low-voltage combined transformer is an electric device for a low-voltage power system, combines the functions of a plurality of transformers, realizes the measurement and protection of parameters such as current, voltage and the like, is widely applied to a low-voltage power distribution system, has the function of preventing secondary side open circuit and a combined structure, and is used for electric energy metering, measurement and relay protection. Based on the law of electromagnetic induction, when primary side current passes through a primary winding of a current transformer, an alternating magnetic field is generated in an iron core, and the magnetic field induces electromotive force in a secondary winding, so that secondary current is generated, the secondary current and the primary current are in proportion, the value of the secondary current is far smaller than that of the primary current, and the primary current can be indirectly known by measuring the secondary current. The voltage transformer converts primary side high voltage into secondary side low voltage by utilizing an electromagnetic induction principle, the secondary voltage is in direct proportion to the primary voltage, a low voltage signal proportional to the primary side voltage is provided for a measuring instrument, a relay protection device and the like, secondary leads are led out in a concentrated mode, wiring complexity is reduced, wiring error probability is reduced, and maintenance and overhaul are facilitated. For example, the invention can realize simultaneous injection of a plurality of products at one time by combining a middle frame and the injection mould, thereby improving the production efficiency, and the universal backboard can be matched with a plurality of auxiliary moulds for installation, so that other low-voltage transformer moulds can be replaced at any time to continue injection production, the switching time of different types of product moulds is reduced, and the production efficiency is improved. Traditional combination formula mutual-inductor structure is fixed, and interior component installs and maintains inconveniently, and heat dispersion is limited, and does not possess long-range or automatic start-stop control function generally, is difficult to satisfy intelligent distribution system's demand. Based on the structure, the open-circuit-preventing type low-voltage combined transformer is compact in structure, safe, reliable and convenient to maintain. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides the open-circuit-preventing low-voltage combined transformer, and the current transformer, the voltage transformer and the open-circuit protector are integrated on the mounting plate, so that the high-voltage danger generated by secondary open circuit of a transformer circuit is effectively avoided, the safety of equipment operation is improved, meanwhile, the mounting plate can be pulled, and the mounting plate is pushed by the compression spring, so that the dismounting and the mounting are convenient, the element overhaul and the element replacement are greatly facilitated, and the problems in the background art are solved. In order to achieve the purpose, the invention provides the technical scheme that the open-circuit-preventing low-voltage combined type transformer comprises a shell, wherein an installation plate is arranged in the shell, a current transformer, a voltage transformer and an open-circuit protector are fixedly arranged at the top of the installation plate, a plurality of equally-spaced connection ports are formed in the tops of two sides of the shell, a plurality of equally-spaced round holes are formed in the rear end of the installation plate, compression springs are fixedly arranged on the inner wall of the front end of each round hole, connection plates are fixedly arranged at the rear ends of the compression springs, connection grooves with the same number as the connection plates are formed in the inner wall of the rear end of the shell, the connection plates are fixedly arranged in the connection grooves, an installation groove is formed in the top of the front end of the shell, and a start-stop control mechanism is fixedly arranged in the installation groove. In a preferred embodiment, the start-stop control mechanism comprises a circuit switch fixed in a mounting groove, a poking plate is arranged at the front end of the circuit switch, a circular groove is arranged at the top of the mounting groove, a motor is fixedly arranged in the circular groove, the top of the motor penetrates through the top of the shell and extends to the outer side of the shell, a rotating rod is fixedly arranged at the bottom