CN205646771U - Electric power harmonic detection device - Google Patents

Abstract

The utility model discloses an electric power harmonic detection device, including first inductance to third inductance, first rectifier, the second rectifier, electric capacity, the stabilivolt, the silicon controlled rectifier, a button switch, the 2nd button switch and contactor, first inductance to the 3rd inductance coils suit is on power cable, when having the current conveyance among the power cable, use inductance generate current, the electric current exports the thyristor control end to after first rectifier rectification, when the electric power harmonic is too big, when the electric current reaches the firing point of silicon controlled rectifier, the controlled silicon is conducted, make the control switch of second rectifier output current be brought into contact ware disconnection contactor, compared with the prior art, the utility model discloses an electric power harmonic on the inductance influence electricity line of force cable, when the humorous intensity of wave of the electric power that produces was too big, the automatic control contactor made electric power automatic disconnection to reach the purpose that detects with the protection, convenient to use has the value of popularization and application.

Description

A kind of electric harmonic detection device

Technical field

This utility model relates to a kind of electricity force checking device, particularly relates to a kind of electric harmonic detection device.

Background technology

Owing to AC network active constituent is power frequency single-frequency, the most any composition different from work frequency Harmonic wave can be referred to as.Owing to sinusoidal voltage stresses on nonlinear load, fundamental current is distorted generation Harmonic wave.Predominant non-linearity is loaded with UPS, Switching Power Supply, commutator, converter, inverter etc..Existing skill In art, for the electric harmonic test result inaccuracy of three-phase power, and do not automatically control open circuit Function, accordingly, there exist room for improvement.

Utility model content

The purpose of this utility model is that provides a kind of electric harmonic detection dress to solve the problems referred to above Put.

This utility model is achieved through the following technical solutions above-mentioned purpose:

This utility model include the first inductance to the 3rd inductance, the first commutator, the second commutator, electric capacity, Stabilivolt, controllable silicon, the first press button, the second press button and catalyst, described first inductance, institute State the second inductance and described 3rd inductance is connected with three cable induction of three phase mains respectively, described first electricity Sense connects to described 3rd inductance series connection, the two ends of described first inductance after series connection to the 3rd inductance and institute Two inputs stating the first commutator connect, and two inputs of described second commutator are respectively by described Second press button and described catalyst be connected to three phase mains the most biphase on, described catalyst normally opened Switch is connected on three phase mains, the cathode output end of described first commutator simultaneously with the first of described electric capacity End, the negative pole of described stabilivolt and described silicon controlled control end and connect, and the negative pole of described first commutator is defeated Go out end simultaneously with the second end of described electric capacity, the positive pole of described stabilivolt, described silicon controlled negative pole, described First end of the first press button and the negative pole of described second commutator connect, the positive pole of described second commutator It is connected with the second end of described silicon controlled positive pole and described first press button simultaneously.

The beneficial effects of the utility model are:

This utility model is a kind of electric harmonic detection device, and compared with prior art, this utility model passes through Electric harmonic on inductance induction power cable, when the electric harmonic intensity produced is excessive, automatically controls and connects Tentaculum makes electric power automatically disconnect, thus reaches detection and the purpose of protection, easy to use, has popularization and application Value.

Accompanying drawing explanation

Fig. 1 is circuit structure schematic diagram of the present utility model.

Detailed description of the invention

The utility model is described in further detail below in conjunction with the accompanying drawings:

As shown in Figure 1: this utility model include the first inductance L1 to the 3rd inductance L3, the first commutator DR1, Second commutator DR2, electric capacity C, stabilivolt DW, controllable silicon SCR, the first press button AN1, Two press button AN2 and catalysts, the first inductance L1, the second inductance L2 and the 3rd inductance L3 respectively with Three cable induction of three phase mains connect, and the first inductance L1 to the 3rd inductance series connection connects, after series connection The two ends of the first inductance L1 to the 3rd inductance L3 are connected with two inputs of the first commutator DR1, and second Two inputs of commutator DR2 are connected to three by the second press button AN2 and catalyst KM respectively Phase power supply the most biphase on, the normal open switch KM1 of catalyst is connected on three phase mains, the first commutator The cathode output end of DR1 simultaneously with the first end, the negative pole of stabilivolt DW and the controllable silicon SCR of electric capacity C Control end to connect, the cathode output end of the first commutator DR1 simultaneously with the second end, the stabilivolt of electric capacity C The positive pole of DW, the negative pole of controllable silicon SCR, first end of the first press button AN1 and the second commutator The negative pole of DR2 connects, and the positive pole of the second commutator DR2 positive pole and first with controllable silicon SCR simultaneously is pressed Second end of button switch AN1 connects.

First inductance L1 to the 3rd inductance L3 mounting coil, on power cable, has electric current to lead in power cable Out-of-date, use inductance to produce electric current, electric current exports to controllable silicon SCR after the first commutator DR1 distillation Controlling end, when electric harmonic is excessive, when electric current reaches the firing point of controllable silicon SCR, controllable silicon SCR is led Logical, make the second commutator DR2 output electric current make catalyst KM disconnect the control switch KM1 of catalyst, hands The dynamic switch AN1 that presses the button can disconnect the power supply of power cable, presses the second press button AN2 and then resets.

Electric capacity C is 300uf, stabilivolt DW model is 2CW1, the first commutator DR1 and the second rectification Device DR2 model is IN4001, controllable silicon SCR model is KP1A/800V, the first inductance L1 to Three inductance L3 are 2mm coiling 5 circle and form.

Of the present utility model ultimate principle and principal character and of the present utility model excellent have more than been shown and described Point.Skilled person will appreciate that of the industry, this utility model is not restricted to the described embodiments, above-mentioned reality Execute and principle of the present utility model is simply described, without departing from this utility model spirit described in example and description On the premise of scope, this utility model also has various changes and modifications, and these changes and improvements both fall within In the range of claimed this utility model.This utility model claims scope by appending claims And equivalent defines.

Claims (1)

1. electric harmonic detection device, it is characterised in that: include the first inductance to the 3rd inductance, first Commutator, the second commutator, electric capacity, stabilivolt, controllable silicon, the first press button, the second press button And catalyst, described first inductance, described second inductance and described 3rd inductance respectively with the three of three phase mains Individual cable induction connects, and described first inductance connects to the most described 3rd inductance series connection, described the after series connection The two ends of one inductance to the 3rd inductance are connected with two inputs of described first commutator, described second rectification Two inputs of device are connected to appointing of three phase mains by described second press button and described catalyst respectively Anticipate biphase on, the normal open switch of described catalyst is connected on three phase mains, the positive pole of described first commutator The while of outfan, the first end, the negative pole of described stabilivolt and described silicon controlled with described electric capacity control end even Connecing, the cathode output end of described first commutator is with the second end of described electric capacity, described stabilivolt the most just Pole, described silicon controlled negative pole, the first end of described first press button and the negative pole of described second commutator Connect, the positive pole of described second commutator simultaneously with described silicon controlled positive pole and described first press button Second end connects.