CN2453590Y

CN2453590Y - Protective device for anti-fraudulent use of electricity

Info

Publication number: CN2453590Y
Application number: CN 00236411
Authority: CN
Inventors: 周泓; 毛庆勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-26
Filing date: 2000-05-26
Publication date: 2001-10-10
Anticipated expiration: 2010-05-26

Abstract

The utility model relates to a protective device for anti-fraudulent use of electricity. The utility model comprises a relay, a sampling circuit, a thyristor T< 1 >, and a thyristor T< 2 >, wherein, the relay can control power supply fire line to be switched on and off; the sampling circuit is composed of two mutual coils, and a voltage sampling resistor; the thyristor T < 1 > control the relay to turn to a normally open contact state, and a triggering tip of the thyristor T < 1 > is connected with the sampling resistor; the thyristor T< 2 > which is provided with a delaying conduction can make the relay turnover into a normally closed contact state. The utility model has the advantages that the utility model has the functions of preventing various fraudulent use of electricity function within 100 meters in front of a meter, the whole control process is full automatic, and the energy consumption is small.

Description

A kind of anti-electricity-theft protective device

The utility model relates to a kind of anti-electricity-theft protective device.

Stealing electricity phenomenon is a kind of public hazards that are difficult to take precautions against.Quite a few is arranged is that stealing causes to line loss in the annual nationwide integrated power grid.At present the anti-electricity-theft product of some producers' developments is many installs anti-electricity-theft parts in table because itself 26S Proteasome Structure and Function limits, connect complicated, need the change electric energy meter, and some power consumption still.Some simple stealing electricity methods such as described traditional anti-electricity-theft device can only be gone up at table, table back, powerless to more emerging advanced stealing mode.Therefore, means and the device of being badly in need of complete function solves this persistent ailment of stealing.

The purpose of this utility model is to provide a kind of preceding (within 100 meters) stealing of table and table of effectively preventing to go up the anti-electricity-theft protective device of various stealing modes.

The utility model, realize that the key of above-mentioned purpose is: power firestreak is by normally-closed contact, the instrument transformer TA of relay ZJ ₂Primary coil and instrument transformer TA ₁Connect the live wire end of ammeter behind the primary coil; Described instrument transformer TA ₂, TA ₁Secondary coil one end link to each other, and with instrument transformer TA ₂, TA ₁The primary coil corresponding end be connected, the secondary coil other end interconnects by a voltage sampling resistor, the signal of sample resistance is exported an end by just meeting diode D ₁, D ₃Meet a controllable silicon T ₁Trigger end; Described controllable silicon T ₁Be connected on above-mentioned instrument transformer TA ₂, TA ₁Between the normally opened contact of primary and secondary be connected end and above-mentioned relay ZJ; Be connected to another controllable silicon T between the normally opened contact of described relay ZJ and the zero-power line ₂, the magnetic coil of relay ZJ and stealing optical alarm circuit; At relay ZJ normally opened contact and controllable silicon T ₂Trigger end between be connected to one by capacitor C ₄, voltage-stabiliser tube D ₇The delay circuit of forming.

The utility model is compared with traditional anti-electricity-theft device has following effect:

(1) can prevent to show stealing within preceding 100 meters effectively;

(2) can prevent from effectively to show live wire over the ground, shunting, unhook, reversing, overload, zero line break and various electrical burglary stealing electricity phenomenon;

(3) full-automatic, the function of automatically cutting off of this device cuts off user's power supply within two seconds, and luminous warning, and stealing can recover to send about one minute after removing automatically.

(4) this device does not have power consumption, simple installation substantially.

The drawing explanation:

Fig. 1 is the circuit embodiments figure of a kind of antitheft electrical protective device described in the utility model.

The utility model concrete structure and the course of work are seen accompanying drawing: the live wire of power supply by the normally closed contact of relay ZJ, passes instrument transformer TA earlier again ₂After, meet instrument transformer TA ₁, instrument transformer TA ₂, TA ₁An end of secondary coil be connected, the other end of instrument transformer is connected in the anti-electricity-theft device and instrument transformer TA by control line ₁The secondary other end constitute sampled voltage Ui.During operate as normal, Ui＜Uo, control circuit is not worked; When stealing takes place when, Ui＞Uo, T ₁Conducting, relay ZJ coil is connected, the ZJ action, the normally closed contact of ZJ is opened disconnection supply line, T ₁Dead electricity is ended, and the normal opened contact closure is connected live wire, makes the ZJ self-sustaining, simultaneously, and delay circuit work.Behind the time-delay 40-50s, delay circuit triggers T ₂Conducting makes the circuit breaker coil losing electricity, thereby normally closed contact is closed again, and normal opened contact is opened.If electricity filching behavior still exists, then repeat said process; If electricity filching behavior is removed, then continue power supply.

This device input rated voltage: 220VAC ± 15%; Output rated power: electronics load≤3KW, inductive load≤1KW; Output rated current :≤20A or according to customer requirements; Stealing operate time:＜2S; Apparent power ≈ 0; Stealing or overload are removed back telegram in reply automatically.

Claims

1. anti-electricity-theft protective device is characterized in that: the power firestreak power firestreak is by normally-closed contact, the instrument transformer TA of relay ZJ ₂Primary coil and instrument transformer TA ₁Connect the live wire end of ammeter behind the primary coil; Described instrument transformer TA ₂, TA ₁Secondary coil one end link to each other, and with instrument transformer TA ₂, TA ₁The primary coil corresponding end be connected, the secondary coil other end interconnects by a voltage sampling resistor, the signal of sample resistance is exported an end by just meeting diode D ₁, D ₃Meet a controllable silicon T ₁Trigger end; Described controllable silicon T ₁Be connected on above-mentioned instrument transformer TA ₂, TA ₁Between the normally opened contact of primary and secondary be connected end and above-mentioned relay ZJ; Be connected to another controllable silicon T between the normally opened contact of described relay ZJ and the zero-power line ₂, the magnetic coil of relay ZJ and stealing optical alarm circuit; At relay ZJ normally opened contact and controllable silicon T ₂Trigger end between be connected to one by capacitor C ₄, voltage-stabiliser tube D ₇The delay circuit of forming.