CN105203801A - United junction box for electrical energy measuring - Google Patents

Abstract

The invention discloses a united junction box for electrical energy measuring. The united junction box comprises a junction box body and a wiring board arranged in the junction box body, and the wiring board is provided with U-V-W phase voltage wiring blocks, U-V-W phase current wiring blocks and null line wiring blocks; every two U-V-W phase current wiring blocks are arranged at the two sides of the corresponding U-V-W phase voltage wiring block. According to the united junction box for electrical energy measuring, voltage connection straps are arranged between every two current connection straps and correspond to electric energy meters, wire intersection after wiring is completed is avoided, wires can be checked in a visualized mode, and an accident is prevented from occurring.

Description

Combined junction box for electric energy metering

technical field

The invention relates to the technical field of power systems, in particular to an electric energy metering joint junction box.

Background technique

The combined junction box for electric energy measurement is widely used in the power industry. It can be used to connect meters or instruments to the secondary circuit in operation to complete the test or calibration of various projects. The main function of the joint junction box in the secondary circuit of the electric energy metering device is to connect the secondary line from the transformer to the terminal of the joint junction box in series and parallel, and then connect it to the terminal of the electric energy meter.

Under normal circumstances, the settings of the voltage connecting piece and the current connecting piece of the combined electric energy metering junction box are unreasonable, and there is no one-to-one correspondence between the dropped wires from the electric energy meter to the wiring hole of the junction box, and the voltage line and the current line form a cross, which is easy to be miswired.

Contents of the invention

In order to solve the above technical problems, the present invention provides a joint junction box for electric energy metering. The voltage connection piece is arranged between the current connection pieces, corresponding to the electric energy meter, which avoids crossing of wires after wiring, intuitively checks the line, and effectively prevents accidents.

For this reason, technical scheme of the present invention is as follows:

A joint junction box for electric energy metering, comprising a junction box body and a junction board arranged in the junction box body, the junction board is provided with U, V, W phase voltage and current junction blocks and a neutral line junction block; the U, V The current junction blocks of the W phase are arranged on both sides of the voltage junction block.

The voltage connection block includes upper and lower connection pieces and a short connecting piece connecting the upper and lower connection pieces.

The distance between the screw holes used to fix the shorting pieces on the upper and lower lugs of the voltage junction block is equal to the distance between the screw holes between the two current junction blocks. In the running state, the shorting piece is connected to the upper and lower lugs of the voltage wiring block, the voltage loop is connected, and the current loop is disconnected. In the maintenance state, the shorting piece connects two current junction blocks, the voltage loop is disconnected, and the current loop is turned on.

The voltage connecting piece of the electric energy metering combined junction box is arranged between the current connecting pieces, corresponding to the electric energy meter, avoiding crossing of wires after wiring, intuitive checking of wires, and effectively preventing accidents.

Description of drawings

Fig. 1 is a schematic structural view of the electrical energy metering combined junction box provided by the present invention.

Detailed ways

The structure of the present invention will be described in detail below in conjunction with the drawings and embodiments.

As shown in Figure 1, a joint junction box for electric energy metering includes a junction box body and a junction board 30 arranged in the junction box body, and the junction board 30 is provided with U, V, W phase voltage and current junction blocks and a neutral line Junction block: The current junction blocks 10 of the U, V, and W phases are arranged on both sides of the voltage junction block 20 . The voltage junction block 20 includes an upper 6, a lower lug 7 and a shorting lug 5 connecting them. The distance between the screw holes 2 and 3 for fixing the shorting piece 5 on the upper and lower lugs 6 and 7 of the voltage connection block 20 is equal to the distance between the screw holes 1 and 4 in the middle of the two current connection blocks 10 . In the running state, the shorting piece 5 is connected to the upper and lower wiring pieces 6, 7 of the voltage wiring block 20, the voltage loop is connected, and the current loop is disconnected. Under the maintenance state, the shorting piece 5 is connected to two current junction blocks 10, the voltage loop is disconnected, and the current loop is turned on. At this time, the maintenance personnel can perform operations such as meter replacement.

The structure of the electric energy metering joint junction box corresponds to the electric energy meter, which avoids the intersection of wires after wiring, and the inspection of wires is intuitive, effectively preventing accidents.

Claims (3)

1. A combined junction box for electric energy metering, comprising a junction box body and a junction board (30) arranged in the junction box body, said junction board (30) being provided with U, V, W phase voltage and current junction blocks and zero line A junction block; it is characterized in that: the current junction blocks (10) of the U, V, and W phases are arranged on both sides of the voltage junction block (20). 2. The joint junction box for electric energy metering according to claim 1, characterized in that: the voltage junction block (20) includes an upper (6), a lower lug (7) and short wires connecting the upper and lower lugs (6, 7). Tab (5). 3. The combined junction box for electric energy metering according to claim 1, characterized in that: the screw holes for fixing the shorting piece (5) on the upper and lower lugs (6, 7) of the voltage junction block (20) The distance (2, 3) is equal to the distance between the screw holes (1, 4) in the middle of the two current junction blocks (10); in the running state, the shorting piece (5) is connected to the upper and lower wiring of the voltage junction block (20) Sheets (6, 7); under the overhaul state, the shorting sheet (5) connects two current junction blocks (10).