Flame-proof low-voltage power distribution cabinet

Abstract

The utility model relates to a flame-proof low-voltage power distribution cabinet, which is characterized by comprising a metering chamber, a wire inlet chamber and a wire outlet chamber, the metering chamber is provided with an electric energy meter and a load control terminal; the wire inlet chamber is provided with a three-phase copper bar which is connected to the intelligent frame circuit breaker; the wire outlet chamber is provided with a three-phase copper bar which is connected to the molded case circuit breaker; the wire outlet end of the intelligent frame circuit breaker is connected to the molded case circuit breaker through a three-phase copper bar. The load control terminal is connected to the intelligent frame circuit breaker; the three-phase copper bar of the wire inlet chamber is connected to a wire inlet cable, the three-phase copper bar of the wire outlet chamber is connected to a wire outlet cable, and the three-phase copper bar connects the wire inlet cable, the intelligent frame circuit breaker, the molded case circuit breaker and the wire outlet cable to form a main loop. The power distribution cabinet integrates a load control metering three-remote function, a comprehensive protection function and a fire alarm automatic power cut-off function of a special transformer user, the occupied space is reduced, the safety of the power distribution cabinet is improved, and the power distribution cabinet is flame-proof and explosion-proof, and is convenient to install and operate.

Description

Technical Field

[0001] The utility model belongs to the field of low-voltage side power consumption, and particularly relates to a flame-proof low-voltage power distribution cabinet. Background Technique

[0002] Low-voltage power distribution cabinets are mainly low-voltage complete switchgear and control equipment, also known as low-voltage switch cabinets. The rated current of low-voltage power distribution cabinets is 50Hz alternating current, and the rated voltage is 380V. The power distribution system is used for power conversion and control of power, lighting, and distribution. Low-voltage complete equipment is widely used in the power distribution, electrical drive, and automatic control equipment of the low-voltage system of power plants. For special transformer users with a transformer capacity of (100kVA - 315kVA), the low-voltage side electrical equipment needs to be equipped with switch cabinets with four functions: negative control metering cabinet (high supply and low metering), low-voltage incoming line cabinet, low-voltage capacitor cabinet, and low-voltage outgoing line cabinet. Existing such switch cabinets are costly, occupy a large area when installed on the ground, and sometimes require the construction of a power distribution room, resulting in waste of resources. At the same time, there are safety hazards when special transformer users use power distribution cabinets. Sometimes, electrical components will spark due to leakage, overcurrent, and short circuit. Especially at high temperatures, electrical components are more likely to catch fire.

[0003] Therefore, for a large number of special transformer users, when solving the problem of simplifying the low-voltage side power distribution cabinet equipment, the floor area of the combined power distribution cabinet is relatively reduced, and the cost is relatively reduced. At the same time, it is necessary to consider improving the performance of the low-voltage side electrical equipment and solving the safe use problem of the power distribution equipment to avoid the explosion and combustion problems caused by electrical component leakage, overcurrent, and short circuit. Summary of the Invention

[0004] The problem to be solved by the utility model is that the functional cabinets configured for the low-voltage side electrical equipment of existing special transformer users have a large floor area, large volume, occupy a large space, high cost, and are prone to safety problems such as fuse failures and explosions during phase loss. A flame-proof low-voltage power distribution cabinet is provided, which integrates the negative control metering three-remote function, comprehensive protection function, and fire alarm automatic power-off function of special transformer users, greatly reducing the floor area and occupied space, improving the safety of the power distribution cabinet against fire and explosion, being convenient for installation, and convenient for use and operation.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a flame-proof low-voltage power distribution cabinet, characterized in that: the power distribution cabinet includes a metering room, an incoming line room, and an outgoing line room;

[0006] The metering room installs an electric energy meter and a negative control terminal, and a seal is added;

[0007] The incoming line room is equipped with three-phase copper bars connected to an intelligent frame circuit breaker, and the intelligent frame circuit breaker is connected to an ammeter;

[0008] The outgoing line chamber is equipped with three-phase copper bars connected to the molded case circuit breaker; the outgoing end of the intelligent frame circuit breaker is connected to the molded case circuit breaker by three-phase copper bars, and the molded case circuit breaker is connected to the ammeter.

[0009] The negative control terminal is connected to the intelligent frame circuit breaker.

[0010] The three-phase copper bars in the incoming line chamber are connected to the incoming line cable, and the three-phase copper bars in the outgoing line chamber are connected to the outgoing line cable. The other ends of the three-phase copper bars in the outgoing line chamber are lapped at the lower end of the molded case circuit breaker; the three-phase copper bars connect the incoming line cable, the intelligent frame circuit breaker, the molded case circuit breaker, and the outgoing line cable to form the main circuit.

[0011] Preferably, buttons and indicator lights are installed on the intelligent frame circuit breaker, and indicator lights are installed on the molded case circuit breaker.

[0012] Preferably, an observation window is installed on the metering chamber.

[0013] The advantages and positive effects of the present utility model are as follows:

[0014] 1. Metering chamber unit: The negative control terminal measurement module copies the electricity consumption of the watt-hour meter to achieve remote telemetry; the negative control terminal realizes remote control and remote signaling by accessing the trip coil and auxiliary contacts of the intelligent frame circuit breaker in the incoming line unit; the negative control terminal remotely transmits the collected watt-hour meter data and the status quantity of the intelligent frame circuit breaker to the monitoring platform of the power company through a wireless network to achieve remote meter reading and remote control of the user's electrical load, and realizes the three-remote function of the negative control terminal branch circuit.

[0015] 2. Incoming line chamber unit: Through the intelligent frame circuit breaker, buttons and indicator lights, it realizes real-time monitoring and voltage, current and short-circuit protection functions for the user's outgoing line electrical equipment, and provides real-time current data for the user to view the magnitude of the electrical load. The outgoing line chamber unit reasonably distributes the load of the user's electrical equipment and provides protection to avoid equipment damage.

[0016] 3. Outgoing line chamber unit: The branch molded case circuit breaker reasonably distributes the magnitude of the electrical load current of the user's each outgoing line circuit electrical equipment. The indicator light feedbacks the on-off operation status of the molded case circuit breaker of each branch outgoing line circuit, and provides leakage, overcurrent and short-circuit protection functions for this branch, and has the function of automatically cutting off the power supply for fire alarm to avoid equipment damage.

[0017] 4. In this anti-combustion low-voltage distribution cabinet of the utility model, an incoming line chamber, a metering chamber, and an outgoing line chamber are adopted. The three-phase copper busbars connect the incoming line cable, intelligent frame circuit breaker, molded case circuit breaker, and outgoing line cable to form a main circuit, which has functions of leakage protection, overcurrent protection, and short-circuit protection. Thus, it replaces the low-voltage side electrical equipment of special transformer users in the existing combined distribution cabinet, reduces costs compared with various existing distribution cabinets, reduces the floor area, occupies less space, effectively controls the fault range of the combined distribution cabinet, automatically cuts off the power supply through fire alarm, avoids equipment damage, and is safe to use, facilitating wide promotion among a large number of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic side structure diagram of an anti-combustion low-voltage distribution cabinet of the utility model;

[0019] Figure 2 Schematic front structure diagram of an anti-combustion low-voltage distribution cabinet of the utility model.

[0020] 1 - Metering chamber, 2 - Electric energy meter, 3 - Negative control terminal, 4 - Incoming line chamber, 5 - Three-phase copper busbar, 6 - Intelligent frame circuit breaker, 7 - Outgoing line chamber, 8 - Molded case circuit breaker, 9 - Ammeter, 10 - Observation window, 11 - Button and indicator light, 12 - Indicator light. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention will be further described in detail below in conjunction with specific embodiments.

[0022] As Figure 1 , 2 shown, there is an anti-combustion low-voltage distribution cabinet. An incoming line chamber 4, a metering chamber 1, an outgoing line chamber 7, etc. are installed inside the distribution cabinet. The incoming line chamber 4, the metering chamber 1, and the outgoing line chamber 7 are in the front half part inside the cabinet body. The incoming line chamber 4 and the metering chamber 1 are at the upper end, and the outgoing line chamber 7 is at the lower end. The capacitor compensation chamber is in the rear half part of the cabinet.

[0023] One electric energy meter 2 and one negative control terminal 3 are installed in the metering chamber 1, and seals are added. An observation window 10 is installed on the cabinet body on one side of the metering chamber 1. The electric energy meter 2 displays the real-time load power of the user. The power and power consumption of the user are calculated based on the load current and voltage magnitude at the user incoming line end. The negative control terminal 3 collects, receives, and sends data.

[0024] The incoming line chamber 4 is installed with three-phase copper busbars 5 connected to an intelligent frame circuit breaker 6. The negative control terminal 3 is connected to the intelligent frame circuit breaker 6. The intelligent frame circuit breaker 6 is connected to an ammeter 9. The intelligent frame circuit breaker 6 monitors the load current and voltage of the user in real time and provides protection functions such as overcurrent protection, short-circuit protection, over- and under-voltage protection, and provides real-time protection for the electrical equipment at the user end; Buttons and indicator lights 11 are installed on the cabinet body of the incoming line chamber 4. The buttons control the opening and closing of the intelligent frame circuit breaker 6, and the indicator lights 12 feedback the current opening and closing operation status of the intelligent frame circuit breaker 6.

[0025] The outgoing line chamber 7 is equipped with three-phase copper bars 5 and molded case circuit breakers 8; the outgoing ends of the intelligent frame circuit breakers 6 are connected to the molded case circuit breakers 8 through the three-phase copper bars 5. The molded case circuit breakers 8 are connected to ammeters 9, and the molded case circuit breakers 8 are connected to the three-phase copper bars 5 and then to the electrical equipment to form an outgoing line loop. The molded case circuit breakers 8 reasonably distribute the electrical loads of the electrical equipment in each outgoing line loop of the user, and provide leakage, overcurrent, and short-circuit protection for this branch to avoid equipment damage. The molded case circuit breakers 8 have the function of automatically cutting off the power supply in case of fire alarm. In case of fire, the power supply at the outgoing ends of each branch loop is automatically cut off to prevent combustion. The ammeters 9 feedback the magnitudes of the electrical load currents in each outgoing line loop; indicator lights 12 are installed on the molded case circuit breakers 8, and the indicator lights 12 feedback the on-off operating states of the molded case circuit breakers 8 in each outgoing line loop.

[0026] When the fire-proof low-voltage power distribution cabinet is working, the three-phase copper bars 5 in the incoming line chamber 4 are connected to the power supply cable, and the three-phase copper bars 5 in the outgoing line chamber 7 are connected to the outgoing line cable and are lapped on the outgoing ends of the molded case circuit breakers 8; the three-phase copper bars 5 connect the incoming line cable, the intelligent frame circuit breaker 6, the molded case circuit breaker 8, and the outgoing line cable to form a main circuit. The negative control terminal 3 is connected to the intelligent frame circuit breaker 6, and the watt-hour meter 2 is connected to the negative control terminal 3.

[0027] At the user incoming line end of the metering chamber 1, a load is connected. The watt-hour meter 2 displays the user power load current and the power consumption. The power company charges the user's electricity bill based on the power consumption of the user on the watt-hour meter 2. The measurement module of the negative control terminal 3 copies the power consumption of the watt-hour meter 2 through 485 transmission to realize remote telemetry data acquisition, reception, and transmission; the control module of the negative control terminal 3 in the incoming line chamber 4 is connected to the trip coil and auxiliary contacts of the incoming line unit intelligent frame circuit breaker 6 to realize remote control and remote signaling; the negative control terminal 3 remotely transmits the data of the watt-hour meter 2 and the status quantities of the intelligent frame circuit breaker 6 collected through the 4G wireless network to the monitoring platform of the power company to realize remote meter reading and remote control of the user's electrical load. The intelligent frame circuit breaker 6 monitors the user load current and voltage in real time, and has the functions of voltage and current short-circuit protection for the frame circuit breaker to provide real-time protection for the electrical equipment at the user end. The buttons control the opening and closing of the intelligent frame circuit breaker 6, and the indicator lights 12 feedback the current opening and closing states of the intelligent frame circuit breaker 6; the outgoing line chamber 7 reasonably distributes the loads of the user's electrical equipment, the indicator lights 12 feedback the on-off operating states of the molded case circuit breakers 8 in each outgoing line loop, and provide leakage, overcurrent, and short-circuit protection functions for this branch, and have the function of automatically cutting off the power supply in case of fire alarm to prevent combustion and avoid equipment damage.

[0028] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope covered by this patent.

Claims

1. A flameproof low-voltage distribution cabinet, characterized in that: The power distribution cabinet includes a metering room, an incoming line room, and an outgoing line room; The metering room is equipped with an electric energy meter, a load control terminal, and a seal; The incoming line room is equipped with a three-phase copper busbar connected to an intelligent frame circuit breaker, and the intelligent frame circuit breaker is connected to an ammeter; The outlet room is equipped with a three-phase copper busbar connected to a molded case circuit breaker; the outlet end of the intelligent frame circuit breaker is connected to the molded case circuit breaker by a three-phase copper busbar, and the molded case circuit breaker is connected to an ammeter; The load control terminal is connected to the intelligent frame circuit breaker; The three-phase copper busbar in the incoming line room is connected to the incoming cable, the three-phase copper busbar in the outgoing line room is connected to the outgoing cable, and the other end of the three-phase copper busbar in the outgoing line room is overlapped on the lower end of the molded case circuit breaker; the three-phase copper busbar connects the incoming cable, the intelligent frame circuit breaker, the molded case circuit breaker, and the outgoing cable to form a main circuit.

2. A flameproof low-voltage distribution cabinet according to claim 1, characterized in that: The intelligent frame circuit breaker is equipped with a button and an indicator light, and the molded case circuit breaker is equipped with an indicator light.

3. A flameproof low-voltage distribution cabinet according to claim 1, characterized in that: An observation window is installed on the metering chamber.

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