CN2055256U - Three-phase device for electricity illegal-use-proof - Google Patents

Abstract

The utility model relates to a special device for electricity illegal use prevention, which is composed of an electricity illegal use preventing wire and an electricity illegal use preventing monitor. The utility model is installed on a power supply line, when an electricity illegal use phenomenon does not occur, a power supply is normal, the power supply is stopped when the electricity illegal use phenomenon occurs, and thereby, the utility model monitors and controls the electricity illegal use phenomenon and guarantees that the electrical energy of a power supply department can not be illegally used. Low voltage and low current are used in a control circuit. The utility model has the advantages of little power consumption and reliable performance, is mainly suitable for three phase power, and can also be used for single phase power.

Description

Three-phase device for electricity illegal-use-proof

Three-phase anti-tamper device relates to power supply or power distribution equipment, is used for preventing that some illegal users from stealing electric energy and causing damage to power supply department outside gauging table.

Mostly there is not anti-electricity-theft device in the existing feed circuit.Though having begun the someone studies; and the applicant also provided a kind of product that the multi-functional power protector of DYBS-1 type of anti-stealing electricity function is arranged last year to market; but this product mainly is made up of electronic circuit and shielding line; power-steeling preventing effect not satisfactory (for example peelable open shielding line stealing); and only be applicable to single-phase electricity, powerless for some three-phase electricity users' electricity filching behavior.

For a kind of effectively (at least can not the power stealing of strip off line skin) anti-electricity-theft device that is used for three-phase electricity is provided, the utility model adopts following structure: thief-proof electric wire is received the anti-electric theft monitoring device as incoming line, common supply lines is connected in the watch-dog output terminal as output line, powers to electrical appliance.The circuit of watch-dog is made of gauging table, transformer, AC relay, power transmission line and additional wire.Three phase lines 1,2,3 of incoming line, by relay contact 6-1,6-2,6-3 receive the input end of gauging table 7.The output of gauging table picks out three phase lines 1 ', 2 ', 3 ', and these lines are the output terminal of watch-dog just.Transformer 8 elementary is connected on any two phase lines 2 ', 3 ' of output line, and secondary three ends are respectively to 4,5 power supplies of two relays, and its to ends of 4 power supplies by additional wire 9.The normally closed contact 4-1 of relay 4 and the normally opened contact 5-1 of relay 5 are connected in the control circuit of relay 6, the two ends of relay 6 respectively by contact 4-1 or 5-1 and with any two phase lines 2,3 at contact 6-2, link to each other behind the 6-3.Relay 6 is magnetic force three-phase breakers (switch), this relay contact normality has two stable states, open or close, only electric current by the time its contact 6-1,6-2,6-3 opens or keeps out state constant by closing to become, contact 6-1,6-2,6-3 are connected on three phase lines 1 of input, on 2,3.Whole watch-dog circuit (comprising terminals) be installed in one lock and the fuse clips of seal in, want to change wiring or change contact 6-1,6-2, the original state of 6-3 must be torn watch-dog seal breakdown fuse clips open.

By foregoing circuit as can be known when the three-phase electricity input monitoring device, if contact 6-1,6-2,6-3 is preset at the state of closing, and between output terminal phase line 2 ', 3 ' pressure reduction is arranged, transformer work, relay 4,5 is activated, contact 4-1 is for opening state, and 5-1 is for closing state, and relay 6 only has an end to be connected with phase line 3, there is not electric current, contact 6-1,6-2,6-3 keeps closed state, normal power supply is in case when having people's stealing that additional wire 9 is cut off, the loop of relay 4 is cut off, contact 4-1 closure, the two ends of relay 6 are connected on two phase lines 2,3, and electric current is by drawing back contact 6-1,6-2,6-3.After this if the initial state of breakdown fuse clips change contact just can not powered again.Adopt relay 5 in order to distinguish stealing and power failure.

Thief-proof electric wire is by the power transmission line 1(2 that is in the center, 3) and gather in its additional wire 9 formations on every side, insulating material 10 be full of between 9 on line 1 and line and line 9 each sections.

Adopt the utility model can prevent stealing effectively, as long as the foreskin attempt stealing of people's strip off power transmission line is arranged, watch-dog will be stopped power supply immediately, and again can't power before opening fuse clips change contact initial state.Relay 6 often is in off position (no current state) and relay 4, the 5th, the little electric current of low-voltage, little power consumption, the utility model can be used for three-phase electricity, do not consider to can be used for single-phase electricity (performance is more reliable than similar products) worth doing yet, only need single-phase electricity phase line and zero line be used as that two phase lines 2,3 are treated and gauging table make into single-phase just.

Description of drawings: Fig. 1 is a circuit diagram of the present utility model; Fig. 2 is the structural map of the thief-proof electric wire of embodiment.

Most preferred embodiment: be an anti-electricity-theft device that is used for three-phase electricity, gauging table 7 is a three-phase kilowatt-hour meter, and the elementary of transformer is 380V, secondary 12 and 36V, and relay 6 is 380V, and 5 is 12V, and 4 is 36V.Thief-proof electric wire is to have many fine rules to constitute around there is a thick line a kind of centre, and the stranded conductor that fixes with rubber, middle thick line is a power transmission line, the end to end single line that on circuit, forms of fine rule on every side, as additional wire, such structure makes has the people to attempt stealing strip off line skin so that must cut off additional wire when power transmission line is exposed and cause that watch-dog is operated a switch and stop power supply.

Claims (3)

1, a kind of three-phase anti-tamper device is made of power transmission line and control circuit, it is characterized in that control circuit is an anti-electric theft monitoring device, and the circuit of watch-dog is made of gauging table, step-down transformer, high-voltage relay and two low-voltage relays at least; Two power transmission lines connect reducing transformer, and reducing transformer connects low-voltage relay, and the low-voltage relay contact is connected in the high-voltage relay loop, and the high-voltage relay contact is connected on the input supply lines; Whole watch-dog circuit comprises that terminals are installed in and locks and add in the fuse clips of seal.

2, a kind of thief-proof electric wire of anti-electricity-theft device adapted, it is characterized in that by power transmission line, be distributed in the additional wire around the power transmission line and be full of power transmission line and additional wire between and insulating material between each section additional wire constitute.

3, thief-proof electric wire according to claim 2 has a thick line in the middle of it is characterized in that, is several strands of fine rules of a lead on the end to end formation electricity on every side, and by the stranded conductor of insulating material sealing.

Images