CN201145702Y - Combined junction box for electric energy metering - Google Patents

Abstract

The utility model discloses a joint junction box for electric energy measurement, which comprises a box body and a box cover. The box body is provided with a three-phase or four-phase power supply connection part and a neutral line connection terminal which are insulated from each other, and each phase power supply connection part is provided with mutual A group of voltage connection terminals, a group of current input connection terminals and a current output connection terminal separated by insulation, a group of current input connection terminals and a group of voltage connection terminals. The two connecting blocks of the current input terminal, the outgoing connection block of the voltage terminal and the current output terminal are respectively provided with test jacks. The wiring mode of the junction box of the utility model corresponds completely to the wiring of the electric energy meter, which simplifies the line connection, the installation and wiring are neat and simple, and the operation of on-site calibration or electrification of the electric energy meter is simple and will not cause misconnection.

Description

Combined junction box for electric energy metering

technical field

The utility model relates to an electric energy metering combined junction box used by a power supply department.

Background technique

The electric energy metering joint junction box currently used by the power supply department has been used for more than 20 years. Its structure includes two parts: the box body and the box cover. The box body is equipped with separate and independent current and voltage terminals. Each group of phase wire current terminals There are three mutually independent terminals with two slidable connecting pieces. The existing combined junction box for electric energy measurement mainly has the following deficiencies in the use process: first, the wirings are misplaced and arranged, which is intricate and irregular, and wiring errors are prone to occur. The second is that some of the connecting pieces need to be connected during normal power-on use, while the other part of the connecting piece needs to be disconnected; but when the power supply department needs to perform on-site calibration or replace the electric energy meter, it is necessary to slide the connecting piece to change the power-on state, which is very troublesome to operate . The 3rd, because the voltage copper wire is relatively soft, it is easy to cause damage and fracture after being compressed by the compression screw and used for a long time and comes off, which can cause casualties in severe cases. Fourth, after the on-site inspection is completed, it often happens that the operator does not reset the connecting piece due to negligence, which leads to the leakage of electricity in the power supply department and causes economic losses.

Contents of the invention

The technical problem to be solved by the utility model is to propose a joint wiring for electric energy metering with tidy installation and wiring, corresponding wiring mode with electric energy meter wiring, easy operation of on-site calibration or electrified meter replacement without causing misconnection, safe and reliable voltage wiring box.

In order to solve the above-mentioned technical problems, the electric energy metering joint junction box of the utility model includes a box body and a box cover, and the box body is provided with three-phase or four-phase power supply wiring parts and a neutral wire terminal insulated from each other, and each phase power supply The wiring part is provided with a group of voltage connection terminals, a group of current input connection terminals and a current output connection terminal which are insulated and separated from each other. Connected by connecting pieces, the two connecting blocks of the set of current input terminals, the outgoing connection block of the voltage terminal and the current output terminal are respectively provided with test jacks.

The electric energy metering combined junction box is provided with a wire clamping device at the incoming line of the voltage terminal.

In the combined electrical energy metering junction box above, a protruding stopper is provided in the box cover at a position corresponding to the tail of the connecting piece in the box body.

In the electric energy metering combined junction box, the wire inlet hole of the current input terminal is larger than the wire inlet hole of the voltage connection terminal.

Because the utility model adopts the above-mentioned technical structure, when in use, the outlet connection block of the voltage terminal is connected with the voltage input connection of the electric energy meter, and the outgoing connection block of the current input terminal is connected with the current input of the electric energy meter. The current output is connected to the current output terminal of the junction box, and its wiring mode is completely corresponding to the wiring of the electric energy meter, which simplifies the line connection, and the installation and wiring are neat and simple. At the same time, the operation of on-site calibration or electrified energy meter replacement is simple and will not cause misconnection. A wire clamping device is installed at the incoming line of the voltage terminal. After a long time of use, the voltage incoming line will not break and fall off, so as to avoid electric shocks and personal injury accidents. When the operator does not reset the connecting piece after construction, the box cover cannot be closed due to the restriction of the raised stopper set in the box cover, thereby reminding the operator to perform the reset operation. The wire inlet hole of the voltage terminal is smaller than the wire inlet hole of the current input terminal, which can prevent the wrong connection of the voltage and current inlet and outlet wires during installation.

Description of drawings

Fig. 1 is a schematic diagram of the front structure of the electric energy metering joint junction box of the present invention after the box cover is removed;

Fig. 2 is a schematic diagram of the lateral structure of the electric energy metering combined junction box of the present invention.

Detailed ways

As shown in FIG. 2 , the combined electrical energy metering junction box includes a box body 4 and a box cover 10 , and the two are sealed and connected together through a box cover sealing hole 11 .

As shown in Figure 1, the box body 4 is provided with three-phase mutually insulated and separated power connection parts and a neutral line connection terminal 14, and each phase power connection part is provided with a group of voltage connection terminals 2 and a group of current input terminals insulated and separated from each other. Connecting terminal 1 and a current output connecting terminal 3, a group of current input connecting terminal 1 and a group of voltage connecting terminal 2 are connected by a connecting piece 9 between the incoming line connection block and the outgoing line connecting block, and the two connections of a group of current input connecting terminal 1 Test jacks 12, 13, 6, 5 are respectively provided on the block, the outgoing connection block of the voltage terminal 2 and the current output terminal 3. A wire clamping device is provided at the incoming line of the voltage terminal 2, and the clamping device adopts a plastic tapered nut 8. The wire entry hole of the current input terminal 1 is larger than the wire entry hole of the voltage connection terminal 2.

As shown in FIG. 2 , a protruding stopper 7 is provided in the box cover 10 at a position corresponding to the tail of the connecting piece 9 in the box body 4 .

During the initial installation, the current of each phase penetrates through the wire inlet hole of the current input terminal 1 shown in Figure 1, passes through the electric energy meter and comes out from the wire outlet hole of the current output terminal 3, and the voltage passes through the tapered nut 8 of the protective wire Then pass through the incoming connection block of the voltage terminal 2. At the same time, because the wire inlet hole of the tapered nut 8 is small, it can prevent the current wire from being misconnected and inserted. When calibrating the meter, as long as the two plugs of each phase of the standard meter are respectively inserted into the two test jacks 12, 13 on the incoming line connecting block and the outgoing line connecting block of each group of current input terminals 1, and the connecting piece 9 on it is disconnected That's it. When changing the meter due to a fault, short-circuit the current loop of each phase with a short wire, that is, insert the plug into the test hole 12 of the incoming connection block of the current input terminal 1 and the test hole 6 of the current output terminal 3, and connect the voltage terminal The connecting piece 9 of 2 disconnects and just can change table. After the on-site construction is completed, it can be reset, and the lid 10 with the stopper 7 is covered and lead-sealed. If the connecting piece 9 does not reset, the stopper 7 on the lid 10 will run into the connecting piece 9 and cannot be covered, so that the on-site operator can be reminded to ensure the effect of reset.

Claims (4)

1. Electric energy metering joint junction box, including box body and box cover, is characterized in that, the box body is provided with three-phase or four-phase power supply wiring part and a neutral wire terminal which are insulated from each other, and each phase power supply wiring part There are a group of voltage connection terminals, a group of current input connection terminals and a current output connection terminal that are insulated from each other. The two connecting blocks of the set of current input terminals, the outgoing connection block of the voltage terminal and the current output terminal are respectively provided with test jacks. 2. The combined electrical energy metering junction box according to claim 1, characterized in that a wire clamping device is provided at the incoming wire of the voltage terminal. 3. The combined electrical energy metering junction box according to claim 1 or 2, characterized in that a protruding stopper is provided in the box cover at a position corresponding to the tail of the connecting piece in the box body. 4. The combined electric energy metering junction box according to claim 1 or 2, characterized in that the wire inlet holes of the current input terminals are larger than the wire inlet holes of the voltage connection terminals.