CN201345535Y - Protective device preventing buzzer burning out - Google Patents

Abstract

The utility model relates to a protective device preventing a buzzer burning out, which is mainly used for transformer stations and relates to a signal reversion circuit. The protective device preventing a buzzer burning out is characterized in that the protective device comprises a time relay 1SJ and a second intermediate relay 2ZJ, one end of a coil of the time relay 1SJ is connected with a negative signal bus -XM, the other end of the coil of the time relay 1SJ is in series connection with a fourth normally open contact 1ZJ(4) of a first intermediate relay 1ZJ and then is connected with a positive signal bus +XM, one end of a coil of the second intermediate relay 2ZJ is connected with the negative signal bus -XM, the other end of the coil of the second intermediate relay 2ZJ is in series connection with a normally open contact 1SJ(1) of the time relay 1SJ and then is connected with the positive signal bus +XM, and a normally close contact 2ZJ(1) of the second intermediate relay 2ZJ is in series connection between a second normally open contact 1ZJ(2) of the first intermediate relay 1ZJ and a release button YJA. The utility model protects the buzzer and prevents the buzzer burning out.

Description

Prevent the protective device that buzzer burns

Technical field

The utility model relates to a kind of protective device that prevents that buzzer from burning, and is mainly used in transformer station.

Background technology

Transformer station adopts the electromagnetic type relaying protection, and the incident that buzzer often occurs burning is depended merely on the light signal indication, does not reach the purpose that timely prompting person on duty in time handles fault.If buzzer burns out, can not in time remind the operations staff that fault is handled, and influence equipment and power grid security.

Existing transformer station audible signal(l)ing device adopts JC-2 type electromagnetic type pulse relay (or claiming JC-2 type pulse relay), and its signal circuit as shown in Figure 1.When fault, pulse relay 1XMJ action, its normally opened contact 1XMJ ₁Closed auxiliary relay 1ZJ, the first normally opened contact 1ZJ of auxiliary relay 1ZJ of starting ₁The closed binding post 2 of connecting pulse relay returns it; The second normally opened contact 1ZJ of auxiliary relay 1ZJ ₂Closure makes auxiliary relay 1ZJ self-sustaining, the 3rd normally opened contact 1ZJ of auxiliary relay 1ZJ ₃Make buzzer send acoustic signal, have only manually, could remove sound equipment, otherwise buzzer is switched on for a long time and burnt out by the YJA involution.By the run duration of the said goods and timely involution limiting factor, cause the buzzer operating time long and make it burn out (be conduction time long be the main cause that burns out).

Summary of the invention

The purpose of this utility model is to provide a kind of protective device that prevents that buzzer from burning, and this protective device can shield to buzzer.

To achieve these goals, the technical solution of the utility model is: prevent the protective device that buzzer burns, relate to the signal return loop; The signal return loop comprises resistance R 1, pulse relay 1XMJ, the first auxiliary relay 1ZJ, experiment button 1YA, disengage button YJA, buzzer FM, the secondary signal binding post T2 of pulse relay 1XMJ links to each other with negative signal bus-XM, and the sub-T1 of first signal terminal of pulse relay 1XMJ links to each other with positive signal bus+XM after connecting with experiment button 1YA, resistance R 1 again; The first normally opened contact 1ZJ of the binding post 2 of pulse relay 1XMJ and the first auxiliary relay 1ZJ ₁Link to each other with positive signal bus+XM again after the series connection; One end of the coil of the first auxiliary relay 1ZJ links to each other with negative signal bus-XM, the normally opened contact 1XMJ of the other end of the coil of the first auxiliary relay 1ZJ and pulse relay 1XMJ ₁Link to each other with positive signal bus+XM again after the series connection; The second normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₂With the normally opened contact 1XMJ that removes after the button YJA series connection again with pulse relay 1XMJ ₁In parallel; First terminals of buzzer FM link to each other with negative signal bus-XM, the 3rd normally opened contact 1ZJ of second terminals of buzzer FM and the first auxiliary relay 1ZJ ₃Link to each other with positive signal bus+XM again after the series connection;

It is characterized in that: protective device comprises time relay 1SJ, the second auxiliary relay 2ZJ; one end of the coil of time relay 1SJ links to each other with negative signal bus-XM, the 4th normally opened contact 1ZJ of the other end of the coil of time relay 1SJ and the first auxiliary relay 1ZJ ₄Link to each other with positive signal bus+XM again after the series connection; One end of the coil of the second auxiliary relay 2ZJ links to each other with negative signal bus-XM, the normally opened contact 1SJ of the other end of the coil of the second auxiliary relay 2ZJ and time relay 1SJ ₁Link to each other with positive signal bus+XM again after the series connection; The normally-closed contact 2ZJ of the second auxiliary relay 2ZJ ₁Be connected on the second normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₂And between the disengage button YJA.

The beneficial effects of the utility model are: increase a time relay 1SJ in existing signal return loop, increase by a relay 2ZJ that merely hits; Guarantee in the maximum duration of buzzer (delaying time 9 seconds), to automatically terminate sound equipment, prevent that buzzer from burning, and played protective effect to buzzer.

Description of drawings

Fig. 1 is the circuit theory diagrams in existing signal return loop;

Fig. 2 is circuit theory diagrams of the present utility model;

Embodiment

As shown in Figure 2, prevent the protective device that buzzer burns, relate to the signal return loop; The signal return loop comprises the first fuse 1RD, the first fuse 2RD, resistance R 1, pulse relay 1XMJ, the first auxiliary relay 1ZJ, experiment button 1YA, disengage button YJA, buzzer FM, positive signal bus+XM is provided with the first fuse 1RD, negative signal bus-XM is provided with the second fuse 2RD, the secondary signal binding post T2 of pulse relay 1XMJ (adopting existing JC-2 type pulse relay) links to each other with negative signal bus-XM, the sub-T1 of first signal terminal of pulse relay 1XMJ and experiment button 1YA, link to each other with positive signal bus+XM again after resistance R 1 series connection; The first normally opened contact 1ZJ of the binding post 2 of pulse relay 1XMJ and the first auxiliary relay 1ZJ ₁Link to each other with positive signal bus+XM again after the series connection; One end of the coil of the first auxiliary relay 1ZJ links to each other with negative signal bus-XM, the normally opened contact 1XMJ of the other end of the coil of the first auxiliary relay 1ZJ and pulse relay 1XMJ ₁Link to each other with positive signal bus+XM again after the series connection; The second normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₂With the normally opened contact 1XMJ that removes after the button YJA series connection again with pulse relay 1XMJ ₁In parallel; First terminals of buzzer FM link to each other with negative signal bus-XM, the 3rd normally opened contact 1ZJ of second terminals of buzzer FM and the first auxiliary relay 1ZJ ₃Link to each other with positive signal bus+XM again after the series connection;

Protective device comprises time relay 1SJ, the second auxiliary relay 2ZJ, and an end of the coil of time relay 1SJ links to each other with negative signal bus-XM, the 4th normally opened contact 1ZJ of the other end of the coil of time relay 1SJ and the first auxiliary relay 1ZJ ₄Link to each other with positive signal bus+XM again after the series connection; One end of the coil of the second auxiliary relay 2ZJ links to each other with negative signal bus-XM, the normally opened contact 1SJ of the other end of the coil of the second auxiliary relay 2ZJ and time relay 1SJ ₁Link to each other with positive signal bus+XM again after the series connection; The normally-closed contact 2ZJ of the second auxiliary relay 2ZJ ₁Be connected on the second normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₂And between the disengage button YJA.

The utility model is improved at existing signal return loop, in existing signal return loop, add a time relay 1SJ, an one relay 2ZJ that merely hits, when by test button 1YA or after having an accident, connect through a resistance R 1 between+XM and the SYM suddenly, pulse relay 1XMJ action, its normally opened contact 1XMJ ₁Closure makes the first auxiliary relay 1ZJ excitation.The 3rd normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₃The closed buzzer FM that connects sends the sound, the first normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₁The closed binding post 2 of connecting pulse relay returns it, the 4th normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₄Closure relay 1SJ turn-on time, time relay 1SJ connects the second auxiliary relay 2ZJ through setting time-delay, and the second auxiliary relay 2ZJ is by being serially connected with the normally-closed contact 2ZJ of 1ZJ self-holding circuit ₁, 1ZJ is disconnected, thereby automatically terminate the buzzer sounding, prevent that buzzer from burning, and played protective effect to buzzer.

The components and parts table

Sequence number	Symbol	Title	Explanation
				1	1RD、2RD	Fuse	Protective effect
2	R1	Resistance	Metering function
				3	1XMJ	Pulse relay	Start the central signal control loop
4	1ZJ	First auxiliary relay	Enlarge contact rating
				5	FM	Buzzer	Sound equipment
6	1SJ	The time relay	Time-lag action
				7	2ZJ	Second auxiliary relay	Enlarge contact rating
8	1YA	The experiment button	The experiment effect
				9	+XM/-XM	The signal bus	Positive-negative power
10	YJA	Disengage button	Disengage button
				11	1ZJ 1/1ZJ 2/1ZJ 3/1ZJ 4	The normally opened contact of 1ZJ	Contact
12	2ZJ 1	The normally-closed contact of 2ZJ	Contact
				13	1XMJ 1	The normally opened contact of 1XMJ pulse relay	Contact
14	1SJ 1	The normally opened contact of 1SJ	Contact

Claims (1)

1. prevent the protective device that buzzer burns, relate to the signal return loop; The signal return loop comprises resistance R 1, pulse relay 1XMJ, the first auxiliary relay 1ZJ, experiment button 1YA, disengage button YJA, buzzer FM, the secondary signal binding post T2 of pulse relay 1XMJ links to each other with negative signal bus-XM, and the sub-T1 of first signal terminal of pulse relay 1XMJ links to each other with positive signal bus+XM after connecting with experiment button 1YA, resistance R 1 again; The first normally opened contact 1ZJ of the binding post 2 of pulse relay 1XMJ and the first auxiliary relay 1ZJ ₁Link to each other with positive signal bus+XM again after the series connection; One end of the coil of the first auxiliary relay 1ZJ links to each other with negative signal bus-XM, the normally opened contact 1XMJ of the other end of the coil of the first auxiliary relay 1ZJ and pulse relay 1XMJ ₁Link to each other with positive signal bus+XM again after the series connection; The second normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₂With the normally opened contact 1XMJ that removes after the button YJA series connection again with pulse relay 1XMJ ₁In parallel; First terminals of buzzer FM link to each other with negative signal bus-XM, the 3rd normally opened contact 1ZJ of second terminals of buzzer FM and the first auxiliary relay 1ZJ ₃Link to each other with positive signal bus+XM again after the series connection;

It is characterized in that: protective device comprises time relay 1SJ, the second auxiliary relay 2ZJ; one end of the coil of time relay 1SJ links to each other with negative signal bus-XM, the 4th normally opened contact 1ZJ of the other end of the coil of time relay 1SJ and the first auxiliary relay 1ZJ ₄Link to each other with positive signal bus+XM again after the series connection; One end of the coil of the second auxiliary relay 2ZJ links to each other with negative signal bus-XM, the normally opened contact 1SJ of the other end of the coil of the second auxiliary relay 2ZJ and time relay 1SJ ₁Link to each other with positive signal bus+XM again after the series connection; The normally-closed contact 2ZJ of the second auxiliary relay 2ZJ ₁Be connected on the second normally opened contact 1ZJ of the first auxiliary relay 1ZJ ₂And between the disengage button YJA.

Images