CN201083783Y

CN201083783Y - Three phase electric energy meter preventing electricity theft

Info

Publication number: CN201083783Y
Application number: CNU2007200385029U
Authority: CN
Inventors: 陆寒熹; 沈辉; 邵全宇
Original assignee: LINYANG ELECTRONICS CO Ltd JIANGSU
Current assignee: Jiangsu Linyang Electronics Co., Ltd.
Priority date: 2007-07-05
Filing date: 2007-07-05
Publication date: 2008-07-09
Anticipated expiration: 2017-07-05

Abstract

The utility model provides a three phase steeling electricity prevention electricity meter, comprising a base shell, a meter cover, a circuit board, a current transformer, a public junction box and an insulation wiring pipe, etc., wherein the top end surface of the base shell is provided with a wiring hole, an inner cavity of the base shell is provided with the public junction box, the insulation wiring pipe is arranged between the public junction box and the wiring hole, the current transformer is inserted into the insulation wiring pipe; the inlet wire of the electricity meter passes through the insulation wiring pipe by the wiring hole to be connected with the public junction box, the outlet wire of the electricity meter is directly connected with the public junction box. The utility model has the advantages of effectively preventing the steeling electricity, lowering cost and improving the performance of products.

Description

Anti electric larceny three phase electric energy meters

Technical field

The utility model relates to a kind of assembly structure of electric energy meter, wears formula on especially a kind of, and inlet wire, outlet be in the electric energy meter both sides, the anti electric larceny three phase electric energy meters of a shared terminal box.

Background technology

Electric energy meter be a kind of be the instrument of purpose with the metering, it by the electric current in the load and voltage sample to data obtain corresponding electric weight by relevant circuit computing.The three-phase electric energy meter current sample obtains by current transformer, if with end of incoming cables and the direct short circuit of leading-out terminal, and the obstructed excess current mutual inductor of electric current, three-phase electric energy meter can not get current sampling data, thus accumulation is less than electric weight; Same voltage sample is to obtain by brace and electric current binding post short circuit, if brace and electric current binding post are disconnected, three-phase electric energy meter can not get the voltage sample data, also accumulates less than electric weight; Three-phase electric energy meter stealing at present mainly is to adopt above-mentioned two kinds of methods.Traditional three-phase electric energy meter end of incoming cables and leading-out terminal great majority are in the same side, provide advantage to electricity filching person, very near because inlet wire is separated by with outlet, easily the direct short circuit of leading-out terminal is followed in the end of incoming cables, and wiring position lead is more, is not easy to find direct short circuit phenomenon.Though the mode of connection that present minority three-phase electric energy meter has also adopted the end of incoming cables to separate with leading-out terminal, but because the ammeter inlet wire does not pass current transformer and just inserts the end of incoming cables, in the three-phase electric energy meter outside with end of incoming cables and leading-out terminal direct short-circuit, still can make the obstructed excess current mutual inductor of electric current, still can implement stealing.

Summary of the invention

The purpose of this utility model is the weak point that overcomes existing three-phase electric energy meter, provides to wear formula on a kind of, and inlet wire, outlet be in the electric energy meter both sides, the anti electric larceny three phase electric energy meters of a shared connection terminal.

The purpose of this utility model is achieved in that it comprises drain pan, the table lid, circuit board, current transformer, circuit board is fixed in the drain pan inner chamber, the table lid is fixed on the drain pan, it is characterized in that: the top end face at described drain pan is provided with entrance hole, be provided with public terminal box in the bottom of described drain pan inner chamber, between described public terminal box and described entrance hole, be provided with the insulation penetration pipe, described current transformer is through on the described insulation penetration pipe, the fixedly ammeter outlet and from the ammeter inlet wire of above-mentioned insulation penetration pipe of described public terminal box, described public terminal box is provided with terminal cap.

The voltage sample end of described public terminal box directly connects with the electric current binding post is inner.

Described public terminal box adopt press insert type fixedly ammeter into and out of line, clamp mutually by binding post lower surface and pressing line frame inboard lower surface and to fix ammeter into and out of line.

Be embedded in the drain pan centring ring behind the described insulation penetration pipe one end cover O-ring seal, the other end by above-mentioned public terminal box gland in above-mentioned drain pan inner chamber.

Described current transformer is fixed on the above-mentioned insulation penetration pipe by O type elastic ring.

The beneficial effects of the utility model are: can stop electricity filching behavior effectively, reduce cost, wiring is reliable.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is an outside drawing of the present utility model.

Fig. 2 is the A-A cut-open view of Fig. 1.

Fig. 3 is the front elevation that Fig. 1 removes terminal cap.

Fig. 4 is the B-B cut-open view of Fig. 3.

Among the figure: 1. pressing line frame; 2. public terminal box; 3. insulation penetration pipe; 4.O type elastic ring; 5. current transformer; 6. drain pan; 7. O-ring seal; 8. centring ring; 9. entrance hole; 10. circuit board; 11. table lid; 12. voltage sample end; 13. electric current binding post; 14. terminal cap.

Embodiment

As shown in Figure 2, circuit board 10 is installed in the inner chamber of drain pan 6, table covers 11 and is installed on the drain pan 6, the top end face of ammeter drain pan 6 is provided with ammeter entrance hole 9, the intracavity bottom of drain pan 6 is provided with public terminal box 2, between public terminal box 2 and entrance hole 9, be provided with insulation penetration pipe 3, be installed with current transformer 5 on it, the ammeter inlet wire passes insulation penetration pipe 3 from entrance hole 9 and inserts public terminal box 2, and the ammeter outlet directly inserts public terminal box 2, and ammeter is advanced, outlet separately, make the ammeter inlet wire pass current transformer earlier simultaneously, even with the end of incoming cables and the leading-out terminal short circuit of ammeter, electric current still by the current transformer sampling, has strengthened anti-stealing electricity function.On the public terminal box 2 terminal cap 14 is housed.

Voltage sample end 12 on the public terminal box 2 directly connects with electric current binding post 13 inside, and the used brace of cancellation conventional voltage sampling directly changes interior connection into, has strengthened anti-electricity-theft ability.

Four screws of row are the inlet wire gib screw on the public terminal box 2, and four screws of following row are the outlet gib screw, and inlet wire terminal box and outlet terminal box are merged into a single whole, and the mode that existing inlet wire terminal box of cancellation and outlet terminal box are separated has reduced cost.Public terminal box 2 fixing cords adopt press insert type, promptly utilizing the rotation of screw to drive pressing line frame 1 moves up and down, by clamping wire about binding post lower surface and the pressing line frame 1 inboard lower surface, by this mode that compresses, make the lead pressurized even, contact resistance is little, significantly reduces burning out of connection terminal, and compatible little line footpath lead, easy-to-connect; Stamp out horizontal straight burr at the inboard lower surface of pressing line frame, prevent that lead from pulling out.Simultaneously, for preventing pressing line frame 1 play up and down when the wiring not, be provided with step with the trip bolt cooperation place in public terminal box 2.

For preventing to insulate penetration pipe play about in the of 3, behind the top cover O-ring seal 7 of insulation penetration pipe 3, be embedded in the centring ring 8, the other end by public terminal box 2 glands in the inner chamber of drain pan 6.Public terminal box 2 is pushed forward into the bottom of drain pan 6 by the gathering sill of drain pan 6, again by two sides screens be fixed on the drain pan 6.

For preventing current transformer 5 play on insulation penetration pipe 3, set up O type elastic ring 4 in the both sides of current transformer, fixed current mutual inductor so not only, but regulated at will position also.

Claims

1. anti electric larceny three phase electric energy meters, comprise drain pan (6), table lid (11), circuit board (10), current transformer (5), circuit board (10) is fixed in drain pan (6) inner chamber, table lid (11) is fixed on the drain pan (6), it is characterized in that: the top end face at described drain pan (6) is provided with entrance hole (9), bottom at described drain pan (6) inner chamber is provided with public terminal box (2), between described public terminal box (2) and described entrance hole (9), be provided with insulation penetration pipe (3), described current transformer (5) is through on the described insulation penetration pipe (3), fixedly ammeter outlet and from the ammeter inlet wire of above-mentioned insulation penetration pipe (3) of described public terminal box (2), described public terminal box (2) is provided with terminal cap (14).

2. anti electric larceny three phase electric energy meters according to claim 1 is characterized in that: the voltage sample end (12) of described public terminal box (2) directly connects with electric current binding post (13) inside.

3. anti electric larceny three phase electric energy meters according to claim 1 and 2, it is characterized in that: described public terminal box (2) adopt press insert type fixedly ammeter into and out of line, clamp mutually by binding post lower surface and the inboard lower surface of pressing line frame (1) and to fix electric energy into and out of line.

4. anti electric larceny three phase electric energy meters according to claim 1 and 2, it is characterized in that: be embedded in the drain pan centring ring (8) behind described insulation penetration pipe (3) the one ends cover O-ring seals (7), the other end by above-mentioned public terminal box (2) gland in above-mentioned drain pan (6) inner chamber.

5. anti electric larceny three phase electric energy meters according to claim 3, it is characterized in that: be embedded in the drain pan centring ring (8) behind described insulation penetration pipe (3) the one ends cover O-ring seals (7), the other end by above-mentioned public terminal box (2) gland in above-mentioned drain pan (6) inner chamber.

6. anti electric larceny three phase electric energy meters according to claim 1 and 2 is characterized in that: described current transformer (5) is fixed on the insulation penetration pipe (3) by O type elastic ring (4).