CN213402211U

CN213402211U - Reactive compensation drawer module for open circuit protection

Info

Publication number: CN213402211U
Application number: CN202022264702.4U
Authority: CN
Inventors: 闻睿; 贾珏
Original assignee: Lexing Electric Wuxi Co ltd
Current assignee: Lexing Electric Wuxi Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-06-08
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses a reactive compensation drawer module for open circuit protection, relating to the technical field of reactive compensation of an electric power system, wherein each drawer module is arranged in an electric cabinet, each drawer module comprises a fixed drawer, a terminal, a current transformer and a microswitch, a handle is arranged on the first side of the fixed drawer, a pulley is arranged at the bottom of the fixed drawer, the terminal is arranged on the second side of the fixed drawer, the drawer module is electrically connected with the electric cabinet through the terminal, the first side and the second side are opposite, the current transformer is arranged inside the fixed drawer, the secondary side of the current transformer is connected with the microswitch in parallel, the microswitch is arranged on the third side of the fixed drawer and is correspondingly installed with a limiting device of the electric cabinet, when the fixed drawer is pulled out from the electrical cabinet, before the terminal is connected with the electrical cabinet and separated, the microswitch is closed in the limiting device, and the current transformer is short-circuited from the outside. The drawer module does not need to cut off the main switch during maintenance, and meanwhile, the secondary side of the current transformer is prevented from being opened, so that the reliability is improved.

Description

Reactive compensation drawer module for open circuit protection

Technical Field

The utility model belongs to the technical field of electric power system reactive compensation technique and specifically relates to a reactive compensation drawer module for open circuit protection.

Background

Reactive compensation is an important energy-saving measure for improving the power factor of an electric load and reducing the loss caused by reactive current in an electric energy transmission line. The existing low-voltage reactive power compensation device mainly comprises an isolating switch, an overload and short-circuit protection switch, a control unit and a reactive power compensation switching unit, and all electrical elements are electrically connected through cables. However, at present, all electrical components are fixedly installed in the electrical cabinet, and when the electrical components are damaged and need to be overhauled, the main switch needs to be switched off, so that the power utilization and power supply quality of a user can be affected; moreover, in high-voltage/low-voltage pre-installed box type transformer substations and combined transformers, due to the space limitation, the replacement of electrical components is time-consuming and labor-consuming, and the maintenance is very inconvenient.

SUMMERY OF THE UTILITY MODEL

The present invention provides a reactive compensation drawer module for open circuit protection, which solves the above problems and needs. The low-voltage reactive power compensation unit can be conveniently and rapidly installed and maintained by using the drawer module, and the main switch does not need to be cut off during maintenance, so that the power utilization and power supply quality of a user are not influenced.

The technical scheme of the utility model as follows:

the utility model provides a reactive compensation drawer module for open circuit protection, each drawer module is installed in the regulator cubicle, every drawer module is including fixed drawer, a terminal, current transformer and micro-gap switch, be equipped with the handle on the first side of fixed drawer, the bottom is equipped with the pulley, the terminal sets up on the second side of fixed drawer, the drawer module passes through terminal and regulator cubicle electrical connection, first side and second side are relative, current transformer sets up the inside at fixed drawer, current transformer's secondary side and micro-gap switch are parallelly connected, micro-gap switch sets up on the third side of fixed drawer, and correspond the installation with the stop device of regulator cubicle, stop device is used for changing micro-gap switch's closed state, when fixed drawer is taken out from the regulator cubicle, before the terminal is connected with the regulator cubicle and is broken away from, micro-gap switch is closed in stop device.

The drawer module further comprises a plurality of groups of reactive compensation switching units arranged in the fixed drawer, each group of reactive compensation switching units comprises a contactor, a reactor and a capacitor, one end of the contactor is connected with the reactor and the capacitor in sequence, the other end of the contactor is connected with one end of a primary side of a current transformer, the other end of the primary side of the current transformer is connected into a main circuit of the electric cabinet, a secondary side of the current transformer and a coil of the contactor are connected with a controller of the electric cabinet through terminals, and the controller controls the switching number of the contactors according to the current of the main circuit collected by the current transformer.

The further technical scheme is that the current transformer is realized based on the model LZBJ 9-10, the microswitch is realized based on the model LXW-515X, and the contactor is realized based on the model GMC-100.

The utility model has the beneficial technical effects that:

the utility model discloses simple structure, convenient to use distributes the electrical components in the low pressure reactive compensation regulator cubicle in each drawer module of telescopic to the switching of the reactive compensation switching unit of control drawer module has been realized through the controller of regulator cubicle, and regulator cubicle and drawer module realize electrical connection through the terminal connector, and compare with prior art need not cut off the main switch, and every drawer module operates alone, and convenience of customers installs fast and maintains; in the drawing process, in order to prevent the secondary side of the current transformer from being opened, the micro switch is arranged to be connected with the secondary side of the current transformer in parallel, when the fixed drawer is drawn out from the electrical cabinet, before the terminal is connected and separated from the electrical cabinet, the micro switch is closed in the limiting device, the current transformer is in short circuit from the outside, and the reliability of the drawer module is improved.

Drawings

Fig. 1 is a top view of a reactive compensation drawer module provided in the present application.

Fig. 2 is a schematic structural diagram of the novel electrical cabinet provided in the present application.

Fig. 3 is an electrical connection diagram of the drawer module provided by the present application.

Fig. 4 is a schematic block diagram of the novel electrical cabinet provided in the present application.

Detailed Description

The following describes the embodiments of the present invention with reference to the accompanying drawings.

The application discloses reactive compensation drawer module for open circuit protection combines fig. 1 and fig. 2 to show, and each drawer module is installed in regulator cubicle 1, and every drawer module includes fixed drawer 2, terminal 3, current transformer 4 and micro-gap switch 5, and is optional, and current transformer 4 realizes based on LZBJ 9-10 model, and micro-gap switch 5 realizes based on LXW-515X model. A handle 201 is arranged on a first side of the fixed drawer 2, a pulley (not shown in the figure) is arranged at the bottom of the fixed drawer 2, a terminal 3 is arranged on a second side of the fixed drawer 2, the drawer module is electrically connected with the electric cabinet 1 through the terminal 3, the first side is opposite to the second side, a current transformer 4 is arranged inside the fixed drawer 2, the secondary side of the current transformer 4 is connected with a micro switch 5 in parallel, the micro switch 5 is arranged on a third side of the fixed drawer 2, and is correspondingly arranged with a limiting device (not shown in the figure) of the electrical cabinet 1, the limiting device is used for changing the closing state of the micro switch 5, when the fixed drawer 2 is drawn out from the electrical cabinet 1, before the terminal 3 is connected with the electrical cabinet 1 and separated, the microswitch 5 is closed in the limiting device (namely, is switched to be closed from an open circuit), the current transformer 4 is short-circuited from the outside, the secondary side of the current transformer is prevented from being open, and the reliability of the drawer module is improved. On the contrary, when the fixed drawer 2 is inserted into the electrical cabinet 1, the microswitch 5 slides out of the limiting device and is switched from closed to open, and the current transformer 4 normally collects the current of the main loop at the moment.

The drawer module further includes a plurality of groups of reactive compensation switching units arranged in the fixed drawer 2, and as shown in fig. 3 and 4, each group of reactive compensation switching units includes a contactor 601, a reactor 602, and a capacitor 603, and optionally, the contactor 601 is implemented based on a GMC-100 model. One end of the contactor 601 is sequentially connected with the reactor 602 and the capacitor 603, the other end of the contactor is connected with one end of the primary side of the current transformer 4, the other end of the primary side of the current transformer 4 is connected into a main circuit of the electrical cabinet through the circuit breaker 604, the secondary side of the current transformer and the contactor coil are connected with a controller of the electrical cabinet 1 through the terminal 3, and the controller controls the switching number of the contactors 601 according to the main circuit current collected by the current transformer 4. It should be noted that the main circuit of the electrical cabinet is a conventional circuit, and the circuit connection relationship thereof is not described in detail in this application.

The utility model discloses simple structure, convenient to use distributes the electrical components in the low pressure reactive compensation regulator cubicle in the each drawer module of telescopic to the switching of the reactive compensation switching unit of control drawer module has been realized to the controller through the regulator cubicle, and the regulator cubicle passes through the terminal connector with the drawer module and realizes electrical connection, compares with prior art and need not cut off the main switch, and every drawer module functions alone, and convenience of customers installs fast and maintains.

What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiments. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and scope of the present invention are to be considered as included within the scope of the present invention.

Claims

1. A reactive compensation drawer module for open circuit protection is characterized in that each drawer module is installed in an electrical cabinet, each drawer module comprises a fixed drawer, a terminal, a current transformer and a microswitch, a handle is arranged on a first side of the fixed drawer, a pulley is arranged at the bottom of the fixed drawer, the terminal is arranged on a second side of the fixed drawer, the drawer module is electrically connected with the electrical cabinet through the terminal, the first side and the second side are opposite, the current transformer is arranged in the fixed drawer, a secondary side of the current transformer is connected with the microswitch in parallel, the microswitch is arranged on a third side of the fixed drawer and is installed corresponding to a limiting device of the electrical cabinet, the limiting device is used for changing the closing state of the microswitch, when the fixed drawer is pulled out of the electrical cabinet, before the terminal is connected with and separated from the electrical cabinet, the microswitch is closed in the limiting device to short the current transformer from the outside.

2. The reactive compensation drawer module for open circuit protection according to claim 1, wherein the drawer module further comprises a plurality of groups of reactive compensation switching units arranged in the fixed drawer, each group of reactive compensation switching units comprises a contactor, a reactor and a capacitor, one end of the contactor is sequentially connected with the reactor and the capacitor, the other end of the contactor is connected with one end of a primary side of a current transformer, the other end of the primary side of the current transformer is connected into the main loop of the electrical cabinet, a secondary side of the current transformer and a contactor coil are connected with a controller of the electrical cabinet through the terminal, and the controller controls the switching number of the contactors according to the main loop current collected by the current transformer.

3. The reactive compensation drawer module for open circuit protection according to claim 2, wherein the current transformer is implemented based on model LZZBJ9-10, the micro switch is implemented based on model LXW-515X, and the contactor is implemented based on model GMC-100.