CN202840267U - Primary wiring loop for integrated measuring cabinet - Google Patents

Abstract

The utility model relates to a primary wiring circuit for an integral metering cabinet, which includes an incoming line circuit, a metering circuit, a voltage change lightning protection circuit, an outgoing line circuit, a first bus bar and a second bus bar, and the incoming line circuit and the metering circuit connected to the first bus, the voltage change lightning protection circuit and the outlet circuit are connected to the second bus, and the metering circuit is connected to the voltage change lightning protection circuit. Compared with the prior art, the utility model has the advantages of simple structure, convenient operation and maintenance, safety and reliability, convenient maintenance and the like.

Description

A primary wiring circuit for an integral metering cabinet

technical field

The utility model relates to a primary wiring circuit of electric equipment, in particular to a primary wiring circuit for an integral metering cabinet.

Background technique

In order to improve the industrialization level and maintenance efficiency of power equipment, it is necessary to research and develop an integral high-voltage metering cabinet, which combines the currently used split-type high-voltage metering cabinet with the current and voltage transformer switch cabinets for metering into one. Complete the manufacturing of the shell, the installation of the electrical measuring equipment, and the wiring of the secondary circuit, and deliver it to the site after passing the acceptance. The on-site construction personnel only need to connect the high-voltage side wires of the integral metering cabinet.

At present, there are two main wiring schemes for the metering cabinet: (1) An electric energy metering cabinet is installed at the power inlet, that is, metering cabinet—voltage transformer cabinet—incoming wire cabinet—outlet wire cabinet 1——outlet wire cabinet 2… ;(2) Place the metering cabinet behind the incoming line cabinet, that is, the incoming line cabinet—the metering cabinet—the voltage transformer cabinet—the outgoing line cabinet 1——the outgoing line cabinet 2…. These two primary wiring schemes have certain shortcomings, and it is difficult to meet the needs of line maintenance and integral metering cabinets.

Contents of the invention

The purpose of this utility model is to provide a primary wiring circuit for an integral metering cabinet with simple structure, convenient operation and maintenance, safety and reliability, and convenient maintenance in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A primary wiring circuit for an integral metering cabinet, including an incoming line circuit, a metering circuit, a voltage change lightning protection circuit, an outgoing line circuit, a first bus bar and a second bus bar, and the incoming line circuit and the metering circuit are connected at the first On the bus, the voltage change lightning protection circuit and the outlet circuit are connected to the second bus, and the metering circuit is connected to the voltage change lightning protection circuit.

The incoming line circuit includes a first current transformer, an incoming line circuit breaker, a first capacitor and a first indicator light. One end of the first current transformer is connected to the first bus bar, and the other end is connected to the incoming line circuit breaker in turn. , a first capacitor and a first indicator light, and the first indicator light is grounded.

The metering circuit includes a first fuse, a first voltage transformer, a second current transformer, a second capacitor and a second indicator light, one end of the first fuse is connected to the first bus bar, and the other end is connected to the The first voltage transformer is connected, one end of the second current transformer is connected to the first bus, and the other end is connected to the second capacitor and the second indicator light in turn, and the second indicator light is grounded.

The voltage change lightning protection circuit includes a second fuse, a second voltage transformer and a first surge protector, one end of the second fuse and one end of the first surge protector are respectively connected to the second current The transformer and the second busbar, the other end of the second fuse is connected to the second voltage transformer, and the other end of the first surge protector is grounded.

The outlet circuit includes a second circuit breaker, a third current transformer, a second surge protector, a switch, a third capacitor and a third indicator light, one end of the second circuit breaker is connected to the second bus, and the other end It is connected with one end of the third current transformer, and the other end of the third current transformer is respectively connected with the second surge protector, the switch and the third capacitor, and the third capacitor is connected with the third indicator light, so The second surge protector, the switch and the third indicator light are all grounded.

Compared with the prior art, the utility model has the following advantages:

1) The utility model has simple structure, convenient operation and maintenance, improves the overall benefit, meets the power distribution requirements of the integral metering cabinet, and is convenient for maintenance;

2) The utility model also has the advantages of being safe and reliable, emphasizing environmental protection, saving resources, and lower cost.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1, a primary wiring circuit for an integral metering cabinet includes an incoming line circuit 1, a metering circuit 2, a voltage change lightning protection circuit 3, an outgoing line circuit 4, a first bus bar 5, and a second bus bar 6. The line circuit 1 and the metering circuit 2 are connected to the first bus 5 , the voltage change lightning protection circuit 3 and the outlet circuit 4 are connected to the second bus 6 , and the metering circuit 2 is connected to the voltage change lightning protection circuit 3 .

The incoming line circuit 1 includes a first current transformer 11, an incoming line circuit breaker 12, a first capacitor 13 and a first indicator light 14. One end of the first current transformer 11 is connected to the first bus bar 5, and the other end is sequentially connected to the incoming line breaker. 12, the first capacitor 13 and the first indicator light 14, the first indicator light 14 is grounded.

The metering circuit 2 includes a first fuse 21, a first voltage transformer 22, a second current transformer 23, a second capacitor 24 and a second indicator light 25, one end of the first fuse 21 is connected to the first bus bar 5, and the other One end is connected to the first voltage transformer 22, one end of the second current transformer 23 is connected to the first bus 5, and the other end is connected to the second capacitor 24 and the second indicator light 25 in sequence, and the second indicator light 25 is grounded.

The voltage change lightning protection circuit 3 includes a second fuse 31, a second voltage transformer 32 and a first surge protector 33, and one end of the second fuse 31 and one end of the first surge protector 33 are respectively connected to the second current The transformer 23 and the second bus bar 6 , the other end of the second fuse 31 is connected to the second voltage transformer 32 , and the other end of the first surge protector 33 is grounded.

The outlet circuit 4 includes a second circuit breaker 41, a third current transformer 42, a second surge protector 43, a switch 44, a third capacitor 45 and a third indicator light 46, and one end of the second circuit breaker 41 is connected to the second bus 6 , the other end is connected with one end of the third current transformer 42, the other end of the third current transformer 42 is respectively connected with the second surge protector 43, the switch 44 and the third capacitor 45, the third capacitor 45 is connected with the third indicator light 46, the second surge protector 43, the switch 44 and the third indicator light 46 are all grounded.

Claims (5)

1. A primary wiring circuit for an integral metering cabinet, characterized in that it includes an incoming line circuit, a metering circuit, a voltage change lightning protection circuit, an outgoing line circuit, a first busbar and a second busbar, and the described incoming line circuit and The metering circuit is connected to the first bus, the voltage change lightning protection circuit and the outlet circuit are connected to the second bus, and the metering circuit is connected to the voltage change lightning protection circuit. 2. A primary wiring circuit for an integral metering cabinet according to claim 1, wherein the incoming line circuit includes a first current transformer, an incoming line circuit breaker, a first capacitor and a first An indicator light, one end of the first current transformer is connected to the first bus, and the other end is sequentially connected to the incoming circuit breaker, the first capacitor and the first indicator light, and the first indicator light is grounded. 3. A primary wiring circuit for an integral metering cabinet according to claim 1, wherein said metering circuit comprises a first fuse, a first voltage transformer, a second current transformer, a second Two capacitors and a second indicator light, one end of the first fuse is connected to the first bus bar, the other end is connected to the first voltage transformer, one end of the second current transformer is connected to the first bus bar, and the other end is connected to the first bus bar Connect the second capacitor and the second indicator light in sequence, and the second indicator light is grounded. 4. A primary wiring circuit for an integral metering cabinet according to claim 3, characterized in that the voltage change lightning protection circuit includes a second fuse, a second voltage transformer and a first surge protection circuit One end of the second fuse and one end of the first surge protector are respectively connected to the second current transformer and the second bus bar, and the other end of the second fuse is connected to the second voltage transformer, The other end of the first surge protector is grounded. 5. A primary wiring circuit for an integral metering cabinet according to claim 1, wherein the outlet circuit includes a second circuit breaker, a third current transformer, a second surge protector, switch, a third capacitor and a third indicator light, one end of the second circuit breaker is connected to the second bus bar, the other end is connected to one end of the third current transformer, and the other end of the third current transformer is respectively connected to the first Two surge protectors, a switch and a third capacitor, the third capacitor is connected to the third indicator light, and the second surge protector, switch and third indicator light are all grounded.

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