CN201964973U

CN201964973U - Electric equipment detector

Info

Publication number: CN201964973U
Application number: CN2010206653723U
Authority: CN
Inventors: 王群英
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2011-09-07
Anticipated expiration: 2020-12-17

Abstract

The utility model relates to an electric equipment detector. Current transformers TL1 and TL2 are respectively arranged at wire outlet ends of an electric transformer, a temperature transducer RT is soaked into an oil tank of the electric transformer, output signals of the temperature sensor RT are input to the input end of a comparator IC2, the current transformer TL1 is connected in series with the current transformer TL2, rectified and filtered signals are input into the other input end of the comparator IC2, the output end of the comparator IC2 is connected to a singlechip IC1, and the level output by the singlechip IC1 is connected with a carrier wave emission circuit consisting of a first 555 time base circuit U1, a second 555 time base circuit U2 and a transformer BT. The electric equipment detector collects oil temperature inside the electric equipment, whether the transformer is in a normal state or not can be judged, warning signals are sent to a duty room through electric carrier waves when the transformer is abnormal, personnel are guided to do corresponding processing on the fault, and the normal operation of the electric equipment is effectively ensured.

Description

A kind of power equipment pick-up unit

Technical field

The utility model relates to a kind of pick-up unit, particularly a kind of power equipment pick-up unit.

Background technology

Power equipment comprises the high-low pressure component equipment, and as isolating switch, transformer etc., power transformer is a high-tension unit, particularly oil-immersed power transformer is extensive use of in China, but when Inside coil short circuit or overload appearred in power equipment, whole transformer meeting abnormal heating caused transformer to damage.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of result is provided simple, practical power equipment pick-up unit.

The technical scheme that the utility model adopted is such: a kind of power equipment pick-up unit, with current transformer TL1, TL2 is installed on the leading-out terminal of power transformer respectively, temperature sensor RT is immersed in the fuel tank of power transformer, the output signal of described temperature sensor RT is input to the input end of comparer IC2, signal behind the current transformer TL1 series current mutual inductor TL2 rectifying and wave-filtering is input to another input end of comparer IC2, output terminal by comparer IC2 is connected to single-chip microcomputer IC1, the level of single-chip microcomputer IC1 output connects relay J 1 through triode Q2, the on-state of ordering by the switch J1-1 of relay J 1 control T and T1, T is connected by the one 555 time base circuit U1 with the output of T1 point, the 2 555 time base circuit U2, the carrier transmit circuit that transformer BT forms sends the carrier wave alerting signal by the high frequency modulated pulse voltage of its production to the carrier wave main frame.

By adopting the aforementioned techniques scheme, the beneficial effects of the utility model are: this device is gathered power equipment interior oil temperature, can judge whether transformer is in normal condition, when transformer is unusual, send alerting signal to duty room by power carrier, instruct personnel that fault is made respective handling, effectively ensure the normal operation of power equipment.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model.

Embodiment

Further specify the utility model below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, a kind of power equipment pick-up unit is installed on the leading-out terminal of power transformer respectively with current transformer TL1, TL2, and temperature sensor RT is immersed in the fuel tank of power transformer, and temperature sensor RT changes with the variation of oil temperature.The output signal of described temperature sensor RT is input to the 3rd pin input end of comparer IC2, when the power transformer energising has load current, current transformer TL1, TL2 has induced voltage respectively, through diode D1 rectification, resistance R 1 current limliting, capacitor C 1 filtering, be input to the 2nd pin of comparer IC2, when the normal oil of power transformer is warm, the A point of the input end of the 2nd pin of comparer IC2 forms the DC voltage of 2-5V, when the 3rd pin input end B point of comparer IC2 is higher than A point current potential, comparer IC2 inside is in rollover states, by its 1st pin output high level, be input to the 24th pin I/O port of single-chip microcomputer IC1 through resistance R 4, export through the processing controls of single-chip microcomputer IC1 internal data, the 3rd pin output noble potential by single-chip microcomputer IC1 makes triode Q2 conducting through resistance R 5 current limlitings, relay J 1 adhesive, switch J1-1 is by transferring normally closed point normal battle to, make T and T1 point be in on-state, the oscillatory circuit of two different frequencies that the one 555 time base circuit U1 and the 2 555 time base circuit U2 form, when T and T1 two terminal shortcircuits (short-circuit type alarm probe signal), the one 555 time base circuit U1 constitutes low-frequency oscillatory network, the electric capacity 1C1 that its oscillation frequency F1 is mainly connected by its output, resistance 1R2 decision, its the 3rd pin output frequency is the low frequency signal of F1, when the 3rd pin of the one 555 time base circuit U1 is exported high level, the high-frequency oscillating circuits work that the 2 555 time base circuit U2 constitutes, the electric capacity 1C3 that its oscillation frequency F2 is mainly connected by its output, resistance 1R4 decision, and oscillation frequency F2 is much larger than F1, be output as the pulse-modulated signal of F2 like this at the 3rd pin of the 2 555 time base circuit U2, this modulation signal passes through by triode Q1, transformer BT, electric capacity 1C5, the driving circuit that electric capacity 1C6 forms produces the high frequency modulated pulse on line of electric force, the high frequency modulated pulse voltage sends the carrier wave alerting signal to the carrier wave main frame, when the carrier wave main frame that is installed in duty room receives carrier signal, after demodulation, alerting signal is sent at the scene, instructs the make respective handling of personnel to fault.

More than show and described ultimate principle of the present utility model and principal character and advantage thereof; the technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the explanation just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications; these changes and improvements all fall in claimed the utility model scope, and the claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. power equipment pick-up unit, it is characterized in that: with current transformer TL1, TL2 is installed on the leading-out terminal of power transformer respectively, temperature sensor RT is immersed in the fuel tank of power transformer, the output signal of described temperature sensor RT is input to the input end of comparer IC2, signal behind the current transformer TL1 series current mutual inductor TL2 rectifying and wave-filtering is input to another input end of comparer IC2, output terminal by comparer IC2 is connected to single-chip microcomputer IC1, the level of single-chip microcomputer IC1 output connects relay J 1 through triode Q2, the on-state of ordering by the switch J1-1 of relay J 1 control T and T1, T is connected by the one 555 time base circuit U1 with the output of T1 point, the 2 555 time base circuit U2, the carrier transmit circuit that transformer BT forms sends the carrier wave alerting signal by the high frequency modulated pulse voltage of its production to the carrier wave main frame.