CN204694756U - There is the single-phase socket detecting device of audible alarm - Google Patents

Abstract

Have a single-phase socket detecting device for audible alarm, it is characterized in that: pilot lamp LD is connected to after connecting with resistance R1 between phase terminal L and zero terminal N, when socket voltage is normal, LD is luminous.Hummer H is connected between zero terminal N and ground wire terminal E, and when socket is normal, its two ends no-voltage, if L and N connects instead, L and E connects inverse time hummer and obtains the electric warning that pipes.Be connected to capacitor C between L and E, when socket does not connect E line, it becomes series circuit to be connected between L and N with hummer H-shaped, and hummer obtains the electric warning that pipes.R2 is the discharge resistance of C, the electric charge of the timely bleed off capacitor internal of energy.Be connected to after resistance R3 connects with switch S between L and E, leakage switch can be detected whether normal.Its advantage is: pilot lamp is bright but the loud explanation socket of hummer is normal; When L and N connect instead, L and E connect instead and do not connect E line time, hummer all can pipe warning, and its circuit design science is simple, and acoustic-optic indicator is intuitively accurate.

Description

There is the single-phase socket detecting device of audible alarm

Technical field

The utility model relate to a kind of can directly show single-phase socket voltage whether normal, ground wire whether connect effectively and the whether wrong socket detector with audible alarm of phase sequence, belong to electrical applications field.

Background technology

In China, be arranged on the socket in all buildings, according to the requirement of " building electric engineering construction quality accident specification ", all will detect it.Existing detecting device, or only have light to show various wiring state, or only have when phase line L and zero line N connect instead, phase line L and ground wire E connects inverse time buzzer warning, and hummer is not reported to the police when not connecing E line, no matter or whether wiring is correct, its hummer is all reported to the police, and just sounding is different, is not easily distinguishable.

Summary of the invention

In order to intuitively can show single-phase socket supply voltage whether ground wire that is normal, test socket fast whether effectively connect and phase sequence whether wrong, the utility model is that an a kind of light emitting diode LD of design gives instruction lamp, a hummer H does acoustic alarm, coordinate with resistance R1, R2, electric capacity C, test socket voltage and wiring whether normal, and often open microswitch S by one and coordinate with resistance R3, the whether normal electric device of test socket loop leakage switch.

Whether the utility model solves the scheme that its technical matters takes: be connected to after being connected with resistance R1 by pilot lamp LD between phase line L and zero line N, normal in order to show socket voltage.Be connected to hummer H between zero line N and ground wire E, L, N line for working as socket connects instead and L, E line connects the warning that pipes inverse time.Be connected to electric capacity C between L and E line, when not connecing E line, be equivalent to be connected between phase line L and zero line N after it is connected with hummer, hummer obtains the electric warning that pipes.Resistance R2 is the discharge resistance of electric capacity C, and the two is connected in parallel.Whether resistance R3 is connected to after connecting with microswitch S between L and E line, turn on-switch S, and be namely connected between L and E after R3 and C parallel connection, its loop current should be more than or equal to 30mA, normal for detecting leakage switch.

The beneficial effects of the utility model are: when socket voltage is normal and phase sequence is correct, and pilot lamp is luminous, and hummer is sound not; When L and N line connect instead, L and E line connect instead and do not connect E line time hummer all to pipe warning, intuitively accurately, get twice the result with half the effort.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the utility model is described further.

Accompanying drawing is circuit theory diagrams of the present utility model, and E is ground wire terminal, and N is zero terminal, and L is phase terminal.Pilot lamp LD coordinates with resistance R1, and between display socket L and N, whether voltage is normal; Hummer H is connected between N and E, its two ends no-voltage when socket is normal, and connect inverse time when L and N meets anti-or L and E, its both end voltage is 220V, and pipe warning; Capacitor C is connected between L and E, and as the unearthed line E of socket, be equivalent to be connected between L and N after it is connected with hummer, hummer obtains the electric warning that pipes; R2 is the discharge resistance of C; Be connected to after resistance R3 connects with switch S between L and E, whether the leakage switch for test socket loop is effectively sensitive.H selects AD22B-22SM, AC220V hummer, and measured current is 17mA; LD selects the red high brightness LED of diameter 3 ~ 5mm; C selects CBB22-224J630V capacitor; R1, R2, R3 select 1/8W, resistance is respectively 120K Ω, the common carbon resister of 220K Ω, 15K Ω, and S selects miniature without self-locking normal open switch.

Embodiment

Insulcrete arranges ground wire terminal E, zero terminal N and phase terminal L, and with insulated conductor, its corresponding inserted sheet with commercially available common 10A three-pin plug is communicated with.Be connected between L and N after being connected with resistance R1 by pilot lamp LD, when normal by seizure socket, LD is luminous.Hummer H is connected between N and E, and when socket is normal, its two ends no-voltage, connect inverse time when L and N meets anti-or L and E, its both end voltage is 220V, and pipe warning.Between L and E, be connected to capacitor C, when socket does not connect E line, for hummer provides a current path, be namely equivalent to be connected between L and N after it is connected with hummer, hummer its two ends actual measurement voltage after capacitor dividing potential drop is about 120V, and can normally pipe warning.Because C is connected between L and E, its electric current should be less than 30mA, otherwise the leakage switch of receptacle loop can trip, and C selects 0.22uF, and its measured current is 15mA.R2 is discharge resistance, for departing from the electric charge of bleed off capacitor internal in time after power supply when the utility model, when avoiding user to touch L, E inserted sheet of three-pin plug " fiber crops electricity ".Be connected to after resistance R3 connects with switch S between L and E, when the leakage switch in test socket loop, connect S, namely be equivalent to resistance R3 in parallel with capacitor C, its actual measurement total current is 31mA, if leakage switch does not trip, illustrate that its N and E line that is malfunctioning or socket connects instead, should process immediately.Except three-pin plug, will all electronic package of insulcrete be comprised in insulation crust, to ensure safety.This shell should leave sound transmission aperture near hummer place, and what the luminous end of pilot lamp LD should expose to this shell is convenient to observation place.

Prove through on-the-spot actual use, respond well.

Claims (1)

1. there is a single-phase socket detecting device for audible alarm, it is characterized in that: between zero terminal N and ground wire terminal E, be connected to hummer H, between phase terminal L and ground wire terminal E, be connected to capacitor C.