Distribution box capable of quickly recovering power supply by using emergency power supply system

Abstract

The utility model discloses a distribution box capable of quickly recovering power supply by using an emergency power supply system, which comprises a box body, and a wire inlet unit, a feeder unit, a metering unit, a reactive compensation unit and an emergency power supply unit are arranged in the box body. The emergency power supply unit comprises an emergency power supply connector socket, and is connected with the main busbar by using a copper bar so as to be connected with the feeder unit; the reactive compensation unit comprises a compensation circuit breaker and an intelligent capacitor, the distribution box is improved, the whole distribution box is reasonable in structural design, safe and reliable, and meanwhile, under the condition that a transformer breaks down and cannot supply power, a generator car can be used for being quickly and conveniently connected into the distribution box to continuously supply power for downstream important load equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a distribution box which can use an emergency power supply system to quickly restore power supply. Background Art

[0002] With the increasing demand for electricity, the performance and quality of distribution boxes have more stringent standards. The current distribution box structure is generally equipped with an incoming line unit, a feeder unit, and a metering unit, which only has the functions of power distribution, metering, protection, and control. When encountering an upstream power supply system failure, the current distribution box does not have the function of emergency power supply and cannot continue to provide power to downstream electrical equipment. Utility Model Content

[0003] The purpose of the utility model is to solve the above technical problems and provide a distribution box that can use an emergency power supply system to quickly restore power supply. The structure design is reasonable and can meet the user's requirements for rapid power restoration.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is:

[0005] A distribution box capable of quickly restoring power supply using an emergency power supply system, comprising a box body, in which an incoming line unit, a feeder unit, and a metering unit are arranged, the incoming line unit is connected to the feeder unit through a main busbar, and further comprising a reactive power compensation unit and an emergency power supply unit;

[0006] The emergency power supply unit includes an emergency power supply connector socket, which is fixedly arranged in a separate box cavity. Four emergency power supply connector sockets are fixed on the installation panel in the box, and are connected to the four main busbars A, B, C, and N respectively using copper bars, and then connected to the feeder unit;

[0007] The reactive power compensation unit includes a compensation circuit breaker and an intelligent capacitor. The main busbar is connected to the compensation circuit breaker through a copper busbar, and the lower port of the compensation circuit breaker is connected to multiple intelligent capacitors through a busbar and a conductor.

[0008] The reactive power compensation unit also includes a lightning arrester, which is connected to the incoming line end of the compensation circuit breaker to protect against lightning strikes and mainly protect the reactive power compensation part.

[0009] The smart capacitor is an existing technology equipment, with a self-healing low-voltage power capacitor as the main body and an intelligent measurement and control processor as the control center. It uses microelectronic software and hardware technology to achieve zero-crossing control of thyristors and delay the switching of the contacts of mechanical magnetic latching relays, and realizes the zero-crossing switching technology of low-voltage power capacitors using a mechanical magnetic latching relay and a thyristor-controlled thyristor composite switching circuit, thereby performing power factor compensation for 0.4kV low-voltage lines.

[0010] The incoming line unit contains a 630A electronic molded case circuit breaker I, and the feeder unit contains three molded case circuit breakers II with residual current protection. The lower end of the incoming line unit is connected to the main busbar through a copper busbar, and the main busbar is connected to the feeder unit through a copper busbar.

[0011] The low-voltage side of the transformer is connected to the incoming line unit molded case circuit breaker I. The electric energy passes through the incoming line unit, flows through the main busbar and feeder unit, and is then transmitted to the downstream electrical equipment.

[0012] The metering unit includes an electric energy meter and a meter collector, which performs the functions of electric energy metering and centralized meter reading by measuring the voltage and current signals of the main bus.

[0013] The box is also equipped with fuses and surge protectors. The surge protectors are connected to the main busbar and mainly protect the feeder units and downstream electrical equipment.

[0014] The connector socket is equipped with a protective cover, which is pressed by a spring with a hinge to prevent dust and splashing water from entering. The protective cover is selected in four colors: red, yellow, blue and green according to the different phases to prevent the plug and socket from being inserted incorrectly. The protective cover and the socket are installed separately. The socket is universal, allowing plugs and sockets of different current levels to be plugged into each other.

[0015] The beneficial effects of the utility model are as follows: by improving the distribution box, the entire distribution box structure is reasonably designed, safe and reliable, and at the same time, when the transformer fails to supply power, the distribution box can be quickly and conveniently accessed by a generator truck to form a continuous power supply for downstream important load equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the back structure of an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the front structure of an embodiment of the utility model.

[0018] 1- box, 2- molded case circuit breaker II, 3- main busbar, 4- socket, 5- compensation circuit breaker, 6- intelligent capacitor, 7- lightning arrester, 8- molded case circuit breaker I, 9- meter collector, 10- energy meter, 11- fuse, 12- surge protector. DETAILED DESCRIPTION

[0019] As attached Figure 1 and attached Figure 2 A distribution box that can use an emergency power supply system to quickly restore power supply is shown, which includes a box body 1, in which an incoming line unit, a feeder unit, and a metering unit are arranged. The incoming line unit is connected to the feeder unit through a main busbar 33, and also includes a reactive power compensation unit and an emergency power supply unit;

[0020] The emergency power supply unit includes an emergency power supply connector socket 4, which is fixedly arranged in a separate box cavity. Four emergency power supply connector sockets 4 are fixed on the installation panel in the box, and are respectively connected to the four main busbars 3 of A, B, C, and N using copper bars, and then connected to the feeder unit;

[0021] The reactive power compensation unit comprises a compensation circuit breaker 5 and an intelligent capacitor 6. The main busbar 3 is connected to the compensation circuit breaker 5 through a copper busbar, and the lower port of the compensation circuit breaker 5 is connected to a plurality of intelligent capacitors 6 through a busbar and a conductor.

[0022] The reactive power compensation unit further comprises a lightning arrester 7, which is connected to the incoming line end of the compensation circuit breaker 5 to prevent lightning strikes and mainly protect the reactive power compensation part.

[0023] The intelligent capacitor 6 is a prior art device, with a self-healing low-voltage power capacitor as the main body and an intelligent measurement and control processor as the control center. It adopts microelectronic software and hardware technology to realize zero-crossing control of the thyristor, delay switching of the contacts of the mechanical magnetic latching relay, and realize the zero-crossing switching technology of the low-voltage power capacitor by the mechanical magnetic latching relay and the thyristor-controlled thyristor composite switch circuit, thereby performing power factor compensation for the 0.4kV low-voltage line.

[0024] The incoming line unit includes a 630A electronic molded case circuit breaker Ⅰ8, and the feeder unit includes three molded case circuit breakers Ⅱ2 with residual current protection. The lower end of the incoming line unit is connected to the main busbar 3 through a copper busbar, and the main busbar 3 is connected to the feeder unit through a copper busbar.

[0025] The low-voltage side of the transformer is connected to the incoming line unit molded case circuit breaker Ⅰ8. The electric energy passes through the incoming line unit, flows through the main busbar 3 and the feeder unit, and is then transmitted to the downstream electrical equipment.

[0026] The metering unit comprises an electric energy meter 10 and a meter collector 9, and performs the functions of electric energy metering and centralized meter reading by measuring the voltage signal and current signal of the main bus.

[0027] The box is also provided with a fuse 11 and a surge protector 12. The surge protector is connected to the main busbar 3 and mainly protects the feeder unit and downstream electrical equipment.

[0028] The emergency power connector adopts a single-pole split structure and uses the MC-type industrial connector of the well-known French brand Staubli. A latch locking structure is used between the plug and the socket 4 to prevent accidental disconnection of the connector. The plug is inserted or unplugged under no-load conditions. The conductor contact part between the plug and the socket 4 adopts a finger contact structure to ensure stable and reliable connection of the conductor. When the upstream power supply system fails and cannot provide power to the downstream electrical equipment, open the cabinet door and connect the matching plug on the emergency generator car to the socket 4 on the distribution box to realize temporary power supply from the emergency generator car to the downstream equipment through the JP cabinet.

[0029] The connector socket 4 is equipped with a protective cover, which is pressed by a spring with a hinge to prevent dust and splashing water from entering. The protective cover is selected in four colors: red, yellow, blue and green according to the different phases to prevent the plug and socket 4 from being inserted into the wrong position. The protective cover and the socket 4 are installed separately. The socket 4 is universal, allowing plugs of different current levels to be plugged into the socket 4.

[0030] The above is only a preferred embodiment of the present utility model. It should be pointed out that for ordinary technicians in the technical field, several improvements can be made without departing from the principle of the present utility model. These improvements should also be regarded as within the scope of protection of the present utility model without paying creative labor.

Claims

1. A distribution box that can use an emergency power supply system to quickly restore power supply, which includes a box body, in which an incoming line unit, a feeder unit, and a metering unit are arranged, and the incoming line unit is connected to the feeder unit through a main busbar, characterized in that: It also includes reactive power compensation unit and emergency power supply unit; The emergency power supply unit includes an emergency power supply connector socket, which is fixedly arranged in a separate box cavity. Four emergency power supply connector sockets are fixed on the installation panel in the box, and are connected to the four main busbars A, B, C, and N respectively using copper bars, and then connected to the feeder unit; The reactive power compensation unit includes a compensation circuit breaker and an intelligent capacitor. The main busbar is connected to the compensation circuit breaker through a copper busbar, and the lower port of the compensation circuit breaker is connected to multiple intelligent capacitors through a busbar and a conductor.

2. The power distribution box capable of quickly restoring power using an emergency power supply system according to claim 1 is characterized in that: The reactive power compensation unit also includes a lightning arrester, and the lightning arrester is connected to the incoming line terminal of the compensation circuit breaker.

3. The power distribution box capable of quickly restoring power using an emergency power supply system according to claim 1 is characterized in that: The incoming line unit contains a 630A electronic molded case circuit breaker I, and the feeder unit contains three molded case circuit breakers II with residual current protection. The lower end of the incoming line unit is connected to the main busbar through a copper busbar, and the main busbar is connected to the feeder unit through a copper busbar.

4. The power distribution box capable of quickly restoring power using an emergency power supply system according to claim 1 is characterized in that: The metering unit includes an electric energy meter and a meter collector, which performs the functions of electric energy metering and centralized meter reading by measuring the voltage and current signals of the main bus.

5. The power distribution box capable of quickly restoring power using an emergency power supply system according to claim 1 is characterized in that: The box is also provided with a fuse and a surge protector.

6. The power distribution box capable of quickly restoring power using an emergency power supply system according to claim 1, characterized in that: The connector socket is equipped with a protective cover, which is selected from four colors of red, yellow, blue and green according to the different phases. The protective cover and the socket are installed in a split type.

Images