Integrated multifunctional low-voltage switch cabinet

Abstract

The utility model relates to an integrated multifunctional low-voltage switch cabinet, which comprises a wire inlet chamber, a metering chamber, a capacitance compensation chamber and a wire outlet chamber, the wire inlet chamber is provided with a three-phase copper bar which is connected to the intelligent frame circuit breaker. The metering chamber is provided with an electric energy meter and a load control terminal, and the load control terminal is connected to the intelligent frame circuit breaker. The capacitance compensation chamber is provided with a compensation controller, a compensation knife switch, a compensation alternating current contactor and a capacitor; the wire inlet end of the compensation knife switch 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 three-phase copper bar connects the incoming cable, the intelligent frame circuit breaker, the molded case circuit breaker and the outgoing cable to form a main loop. The integrated switch cabinet integrates comprehensive power distribution and load control metering, automatically alarms to cut off a power supply, controls temperature and dissipates heat, is flame-proof and explosion-proof, is safe, greatly reduces the occupied area and space, and is convenient to install, use and operate after being integrated.

Description

Technical Field

[0001] The utility model belongs to the field of low-voltage power distribution, and particularly relates to an integrated multi-functional low-voltage switch cabinet. Background Art

[0002] For special transformer users whose transformer capacity may be in the range of (100 kVA - 315 kVA), the low-voltage side electrical equipment needs to be equipped with switch cabinets with four functions, namely a negative control metering cabinet (high-voltage supply and low-voltage metering), a low-voltage incoming line cabinet, a low-voltage capacitor cabinet, and a low-voltage outgoing line cabinet. Existing such switch cabinets are costly, occupy a large floor area when installed on the ground, and also require the construction of a distribution room, resulting in waste of resources, with a floor area of at least 5 - 6 square meters. Moreover, the combined cabinet is tall and large, still occupies a relatively large space, is extremely inconvenient to use and operate, and has a relatively high cost; at the same time, the low-voltage distribution cabinets configured on the low-voltage side of users have potential safety hazards, and there are some fault problems such as electric leakage, overcurrent, and short circuit. Especially in high-temperature climates, when operating for a long time, the electrical components heat up, making it more likely to occur safety problems such as combustion.

[0003] Therefore, for a large number of special transformer users, in solving the problem of simplifying the low-voltage side electrical distribution cabinet equipment, reducing the floor area and volume of the distribution cabinet, reducing costs, improving the performance and safety of the low-voltage side electrical equipment, and focusing on the remote control function of the main circuit of the negative control terminal, the function of automatically cutting off the power supply for fire alarm and temperature control heat dissipation is an urgent problem to be solved, which is convenient for wide promotion and use. 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 when installed on the ground, a large volume that occupies space, waste resources, high cost, and are prone to safety problems such as fuse failures and phase loss. The utility model provides an integrated multi-functional low-voltage switch cabinet, which integrates the comprehensive power distribution and negative control metering of special transformer users, automatically alarms and cuts off the power supply and has temperature control heat dissipation, greatly reducing the floor area and space, reducing costs, and being convenient for installation and operation of the integrated distribution cabinet.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: an integrated multi-functional low-voltage switch cabinet, mainly including an incoming line chamber, a metering chamber, a capacitor compensation chamber, and an outgoing line chamber;

[0006] The incoming line chamber is installed with a three-phase copper bar connected to an intelligent frame circuit breaker;

[0007] The metering chamber is installed with an electric energy meter and a negative control terminal, and a seal is added. The negative control terminal is connected to the intelligent frame circuit breaker;

[0008] The capacitor compensation chamber is equipped with a compensation controller, a compensation knife switch, a compensation AC contactor, and compensation capacitors; the incoming line end of the compensation knife switch is connected to the intelligent frame circuit breaker, the outgoing line end of the compensation knife switch is connected to the compensation AC contactor through a three-phase copper busbar, the compensation capacitors are connected to the compensation AC contactor, and the compensation AC contactor is connected to the compensation controller;

[0009] The outgoing line chamber is equipped with a three-phase copper busbar connected to the molded case circuit breaker; the outgoing line end of the intelligent frame circuit breaker is connected to the molded case circuit breaker through a three-phase copper busbar;

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

[0012] The advantages and positive effects of the present utility model are:

[0013] 1. Metering chamber unit: The negative control terminal measures, transmits, and copies the electricity consumption of the electricity meter to achieve remote telemetry; the negative control terminal realizes remote control and remote signaling by accessing the tripping coil and auxiliary contacts of the intelligent frame circuit breaker in the incoming line unit; the negative control terminal remotely transmits the collected electricity 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 electricity load.

[0014] 2. Incoming line chamber unit: The intelligent frame circuit breaker monitors and protects the user's outgoing line electrical equipment in real time, provides protection functions such as overcurrent, short circuit, over- and under-voltage, provides real-time protection for the electrical equipment at the user's end, and provides real-time current data for the user to view the magnitude of the electricity load.

[0015] 2. Outgoing line chamber unit: The molded case circuit breaker reasonably distributes the magnitude of the electricity load current of the electrical equipment in each outgoing line circuit of the user, the indicator lamp feedbacks the on-off operation status of the molded case circuit breaker in 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.

[0016] 3. Capacitor compensation unit: The compensation controller automatically issues on / off control signals according to the magnitude of the user's load current and the change of the power factor, controls the AC contactor to disconnect and close, and the compensation capacitor emits capacitive current to balance the inductive current on the user's power consumption side, so as to compensate and improve the power factor to meet the requirements. The capacitor compensation function is controlled by the knife switch in the capacitor compensation chamber to be put into and withdrawn from operation. At the same time, warning temperature and forced heat dissipation temperature are set on the temperature controller of the compensation capacitor.

[0017] 4. An integrated multi-functional low-voltage switchgear of the present utility model: Since it adopts a distribution cabinet integrating an incoming line chamber, a metering chamber, a capacitor compensation chamber, and an outgoing line chamber, the incoming line cable, intelligent frame circuit breaker, molded case circuit breaker, and outgoing line cable are connected to form a main circuit, which balances the inductive current on the user's power consumption side, compensates and improves the power factor to meet the requirements, plays a role in protecting against overload and short circuit, and has the function of automatically cutting off the power supply for fire alarm. At the same time, the capacitor compensation chamber monitors the capacitor temperature and has an automatic heat dissipation function, conducts overvoltage protection, avoids equipment damage, and is safe to use, thus replacing the existing combined distribution cabinet, reducing costs, having a small floor area, effectively controlling the fault range of the combined distribution cabinet, being convenient to install and operate, and being convenient to widely promote a large number of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic side view of the structural circuit of an integrated multi-functional low-voltage switchgear of the present utility model.

[0019] 1 - Incoming line chamber, 2 - Electric energy meter, 3 - Negative control terminal, 4 - Metering chamber, 5 - Intelligent frame circuit breaker, 6 - Molded case circuit breaker, 7 - Outgoing line chamber, 8 - Compensation capacitor, 9 - Compensation AC contactor, 10 - Capacitor compensation chamber, 11 - Compensation knife switch, 12 - Compensation controller, 13 - Three-phase copper bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described in detail below in conjunction with specific embodiments.

[0021] As Figure 1 shown, an integrated multi-functional low-voltage switchgear, the switchgear is composed of four chambers: an incoming line chamber 1, a metering chamber 4, a capacitor compensation chamber 10, and an outgoing line chamber 7. The incoming line chamber 1, the metering chamber 4, and the outgoing line chamber 7 are in the front half part of the cabinet body, and the capacitor compensation chamber 10 is in the rear half part of the cabinet, with a floor area less than 1 - 2 ㎡.

[0022] One electric energy meter 2 and one negative control terminal 3 are installed in the metering chamber 4, and seals are added. An observation window is installed on the cabinet body on one side of the metering chamber 4. The electric energy meter 2 in the metering chamber 4 displays the real-time load power consumption of the user, and the negative control terminal 3 remotely reads the power consumption of the electric energy meter 2 through transmission to achieve remote telemetry.

[0023] In the incoming line chamber 1, a three-phase copper busbar 13 is installed to connect to the intelligent frame circuit breaker 5, and the negative control terminal 3 is connected to the intelligent frame circuit breaker 5. The intelligent frame circuit breaker 5 monitors the user load current and voltage in real time, provides protection functions such as overcurrent, short circuit, over- and under-voltage, and provides real-time protection for the electrical equipment at the user end. On the cabinet body of the incoming line chamber 1, incoming line instrument buttons and indicator lights are installed. The buttons control the opening and closing of the intelligent frame circuit breaker 5, and the indicator lights feedback the current opening and closing operation status of the intelligent frame circuit breaker 5.

[0024] The control module of the negative control terminal 3 realizes remote control and remote signaling by accessing the trip coil and auxiliary contacts of the intelligent frame circuit breaker 5 in the incoming line chamber 1. The negative control terminal 3 collects, receives, and sends data. The negative control terminal 3 remotely transmits the data of the watt-hour meter 2 and the status quantity of the intelligent frame circuit breaker 5 collected through the wireless network to the monitoring platform of the power company to realize remote meter reading and remote control of the user's electricity load.

[0025] In the outgoing line chamber 7, the outgoing line end of the intelligent frame circuit breaker 5 is connected to the molded case circuit breaker 6 through a three-phase copper busbar 13. The molded case circuit breaker 6 reasonably distributes the electricity load of the electrical equipment in each outgoing line circuit of the user and provides overcurrent and short-circuit protection for this branch. On the cabinet body of the outgoing line chamber 7, outgoing line instrument indicator lights are installed to feedback the opening and closing operation status of the molded case circuit breaker 6 in each branch outgoing line circuit.

[0026] In the capacitor compensation chamber 10, a compensation knife switch 11, a compensation controller 12, several compensation AC contactors 9, and several compensation capacitors 8 are installed through a three-phase copper busbar 13. The incoming line end of the compensation knife switch 11 is connected to the intelligent frame circuit breaker 5 through a three-phase copper busbar 13. The compensation knife switch 11 is the main switch for the input and output operation of the capacitor compensation function. The outgoing line end of the compensation knife switch 11 is connected to several compensation AC contactors 9 through a three-phase copper busbar 13. The main contacts of the compensation AC contactor 9 are connected to the compensation capacitor 8. The compensation capacitor 8 emits capacitive current to balance the inductive current on the user's power consumption side. The auxiliary contacts of the compensation AC contactor 9 are connected to the compensation controller 12 and are controlled by it to perform opening and closing. The compensation controller 12 is installed on the cabinet body on one side of the capacitor compensation chamber 10.

[0027] When the integrated power distribution cabinet is working, the incoming line cable of the incoming line chamber 1 is connected to the three-phase copper busbar 13, the three-phase copper busbar 13 of the outgoing line chamber 7 is connected to the outgoing line cable, and the other end of the three-phase copper busbar 13 is lapped on the outgoing line end of the molded case circuit breaker 6. The three-phase copper busbar 13 connects the incoming line cable, the intelligent frame circuit breaker 5, the molded case circuit breaker 6, and the outgoing line cable to form a loop.

[0028] The incoming line terminal of the metering room 4 is connected to the load. The electricity meter 2 displays the user's power load current and power consumption. The power company charges the user's electricity bill through the electricity meter 2. The measurement module of the negative control terminal 3 copies the power consumption of the electricity meter 2 through 485 transmission, realizing remote telemetry data acquisition, reception, and transmission. The control module of the negative control terminal 3 in the incoming line room 1 is connected to the trip coil and auxiliary contacts of the intelligent frame circuit breaker 5 of the incoming line unit, realizing remote control and remote signaling. The negative control terminal 3 remotely transmits the data of the electricity meter 2 and the status quantity of the intelligent frame circuit breaker 5 collected through the 4G wireless network to the monitoring platform of the power company, realizing remote meter reading and remote control of the user's electricity load. The intelligent frame circuit breaker 5 monitors the user's load current and voltage in real time, providing protection functions such as overcurrent, short circuit, over- and under-voltage, etc. The buttons and indicator lights control and feedback the current open and closed states of the intelligent frame circuit breaker 5. The capacitor compensation room 10 collects the user's current and voltage data, calculates the data during the user's electricity consumption, and automatically issues on / off control signals to control the disconnection and closing of the compensation AC contactor 9, balancing the current on the user's electricity consumption side. When the power factor fails to meet the requirements of the power company, compensation capacitors are put in to improve the power factor to meet the requirements of the power company. The outgoing line room 7 reasonably distributes the load of the user's electrical equipment and provides protection to avoid equipment damage.

[0029] 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 limiting 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. An integrated multifunctional low-voltage switch cabinet, characterized in that: The switch cabinet includes an incoming line room, a metering room, a capacitor compensation room, and an outgoing line room; The incoming line room is equipped with a three-phase copper busbar connected to an intelligent frame circuit breaker; The metering room is equipped with an electric energy meter, a load control terminal, and a seal, and the load control terminal is connected to an intelligent frame circuit breaker; The capacitor compensation room is equipped with a compensation controller, a compensation knife switch, a compensation AC contactor, and a compensation capacitor; the inlet end of the compensation knife switch is connected to the intelligent frame circuit breaker, the outlet end of the compensation knife switch is connected to the compensation AC contactor through a three-phase copper busbar, the compensation capacitor is connected to the compensation AC contactor, and the compensation AC contactor is connected to the compensation controller; The outlet room is equipped with a three-phase copper busbar connected to the molded case circuit breaker; the outlet end of the intelligent frame circuit breaker is connected to the molded case circuit breaker through the three-phase copper busbar; 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 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. The integrated multifunctional low-voltage switch 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.

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