JPS5823132A - Method of self-holding relay - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-holding circuit 1 for a relay using a thyristor and a diode. FIG. 1 is a circuit explanatory diagram showing a conventional self-holding circuit. 1.2.3 are alarm contacts, and each relay is closed when a failure occurs and remains closed until recovery.O4, 5.6 is a lap contact type auxiliary relay, and 7.8 .9 is auxiliary relay 7, 8.9
This is a wrap contact. l0ti wrap contact 7.8.9
The auxiliary relay S 11 is a self-holding contact of the auxiliary relay 10, and 12 Fi is a push button switch for holding and releasing the line. PN indicates the positive and negative electrodes of the power source, respectively. In this circuit, each alarm contact is provided with 5 auxiliary relays,
The wrap contact converts the continuous signal into a pulse signal I of approximately meθC, and the auxiliary relay IO is operated by the signal C2 to maintain self-holding. In order to restore the auxiliary relay lO, push button switch 12 is pressed to release the hold.

Even if other contacts subsequently close, the auxiliary relay 10 is held by repeating the same operation. In this circuit, each alarm contact l.

In contrast to 2.3, wrap contact type auxiliary relays 4, 5, and 6 are required.In addition, the more ridges the alarm contact has, the more auxiliary relays such as #1 are required.

In such a case, C'-- not only requires space, but also increases the number of mechanical parts, which may cause a failure.

The present invention is based on the above-mentioned circumstances, and is an auxiliary relay with wrap contacts - the two contact parts are thyristors.

It is an object of the present invention to provide a self-holding circuit which is composed of a diode and a resistor, and is characterized in that the space is narrowed, and at the same time, an auxiliary relay is omitted and the circuit is made stationary.

An embodiment according to the present invention will be described with reference to FIG. In the figure (-), 1 and 2.3 are alarm contacts, which close when the g! cable operates and do not open until it returns.1
4, 15.16 is a current limiting resistor, 17°18.19
are thyristors that operate when each alarm contact 1, 2.3 is closed, and 20, 21, and 22 are diodes for preventing wraparound. 23 and -24 are thyristor bias adjustment resistors, 25 is an auxiliary relay that operates when contacts 1 and 2.3 are closed, 10 is an auxiliary relay that maintains itself when the auxiliary relay 25 is activated, and 13 is an auxiliary relay 25. 11 is the a contact of the auxiliary relay 10, 2
5. , 254 are four contacts of the auxiliary relay 25, 12 is a push-button switch for releasing the self-holding of the auxiliary relay 10, and PN indicates the positive and negative electrodes of the electrical terminal, respectively. With this C2 configuration, when any of the alarm contacts, for example alarm contact 1, closes, the resistor 14. Current flows through diode 20, activating the auxiliary relay. When the auxiliary relay 5 operates, its contact 25a causes the auxiliary relay 10 to operate, and at the same time, the resistor O is activated.

The bias current determined by 24 is applied to each thyristor 17, 18, 19+- through contact 254.
join. At this time, only the thyristor 17 becomes conductive.

Then, since the voltage at point A decreases, the 12 auxiliary relay 25 returns to its original state. Even if the auxiliary relay 25 returns, the auxiliary relay 10
maintains itself at its contact point 11. Here, alarm contact 1
If the alarm contacts 2 and 3 continue to close even if the self-holding of the auxiliary relay IO is released using the push button switch 12, if the other alarm contacts 2 and 3 continue to close, the above-mentioned operation will be repeated. The auxiliary relay 10 is made to self-hold. Further, the thyristor which has become conductive due to the above operation operates as long as the contacts 1, 2, and 3 are closed, and when the contacts open, the thyristor immediately returns to the I: non-conducting state.

If you create an alarm circuit with this kind of configuration (two-way alarm circuit), it will have the same function as the conventional one: On the other hand, the circuit can be made stationary and can be easily assembled while improving reliability. A circuit can be configured without using many auxiliary relays.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an alarm circuit composed of a conventional self-holding circuit [2], and Fig. 2 is a clear diagram of an alarm circuit composed of a self-holding circuit C2, which shows an embodiment of the present invention. 0 1, 2.3 Alarm contact 10 Auxiliary relay 12 Push button switch [3 Alarm 17, 18.19 Sai!j SuI'io, 21
．． 22 diodes 25 auxiliary relay No. 111I Fig. 2

Claims (1)

[Claims] In a self-holding circuit that receives multiple pieces of information through contact input,
By reducing the number of auxiliary relays as much as possible, the circuit can be restored even if the information input contacts are closed in succession, and even if another information input contact is newly closed while the previous contact is closed, the previous contact A self-holding method for a relay, which is characterized by being self-holding and resettable in the same way as in the case of .