CS218479B1 - Connection for feeding the control circuit of the switch - Google Patents

Description

(54) Connection to power the switch control circuit

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a circuit for powering a control circuit of a switch, in particular an electromagnetic input drive, comprising a positive and negative pole operating supply network with a main and auxiliary circuit breaker, a positive and negative pole backup supply network. and second conductor, operation and standby control and interlocking kits, control and interlocking set, operation and standby trip coils, NO coils and auxiliary relays with coils, normally open, normally open and / or normally open contacts.

Previously, the power supply circuit and back-up power supply have been used for powering the switch control circuit, with the power-off trip coils connected to the power supply, the power-off trip coils connected to the back-up power supply, and the power-supply coils connected to the power supply network. eg according to the author's certificate No. 212 090.

The disadvantage of the described circuit for powering the switch control circuit was that when the mains power supply was lost, the switch could not be operated with the exception of one complete * trip using the backup * trip trip coils until the fault was rectified. In the case of an arc short circuit, it was not possible to provide either a reclosing * function or a simple switch on of the switch. Connection of the backup control limited the operational capability of the switch.

These disadvantages are overcome by the circuitry for supplying the control circuit of the switch according to the invention, characterized in that a coil of the first auxiliary relay is connected between the positive and negative poles of the operational power supply network after the operational power supply circuit breaker. Its break contact is connected in series with the auxiliary make contact of the mains circuit breaker in the coil lead of the second auxiliary * relay, connected between the positive pole * and the negative pole of the backup mains network behind its circuit breaker.

This second auxiliary relay has a normally closed contact between the positive pole of the operational power supply network and a first normally closed mains conductor, and a further normally closed contact is connected between the negative pole of the operational power supply network and the second normally closed mains conductor. One make contact of this second auxiliary relay is connected between the positive pole of the backup power supply network and the first make-up network conductor and another make contact is connected between the negative pole of the backup power supply network and the second make-up network conductor.

The third auxiliary relay may have a set of movable change-over contacts, fixed make contacts and fixed open contacts instead of normally open contacts and normally open contacts]! contacts connected so that the movable change-over contacts are connected to the first conductor and to the second conductor of the closing network, the fixed break contacts are connected to the positive and negative poles of the operating supply network behind the circuit breaker of the mains supply and the fixed closing contacts are connected to the positive and negative pole of the backup power supply network behind the circuit breaker.

An example of a practical embodiment of the invention is shown in Figures 1 and 2.

FIG. 1 shows a circuit for powering a switch control circuit having a power supply network 1 with a positive pole 3 and a negative pole 4 protected by a circuit breaker 5 of the power supply network 1 with a pair of main contacts 8, 7 and auxiliary make contact 8 and a backup supply network 2 with a positive pole 9 and a negative pole 10 protected by a circuit breaker 28. The switching network is formed by a first wire 11 and a second wire 12. The electromagnetic input drive comprises tripping coils 13 of operation tripping, tripping coils 14 of backup tripping and closing coils 15. of the operating cut-out are connected directly to the negative pole 4 of the operating supply network 1, their inlets 17 are connected to the positive pole 3 of the operating supply network 1 via the operating cut-off control unit 18 containing contacts and auxiliary relays with coils. to the negative pole 4 of the operating supply network 1. The output 21 of the trip coils 14 of the backup trip is connected directly to the negative pole 10 of the backup supply 2, their supply 20 is connected to the positive pole 9 of the backup supply 2 via the trip control and blocking set 22. comprising contacts and auxiliary relays with coils whose common terminal 23 is connected to the negative pole 10 of the backup power supply network 2. The terminals 24 of the ignition coils 15 are connected directly to the second conductor 12 of the power supply network. the control and blocking arrays 26, comprising contacts and auxiliary relays with coils, the common terminal 27 of which is connected to the second wire 12 of the arming network.

A coil of the first auxiliary relay 29 is connected between the positive pole 3 and the negative pole 4 of the operating supply 1 after the circuit breaker 5 of the operating supply 1. Its break contact 30 is connected in series with the auxiliary make contact 8 Auxiliary relay 32 connected between the positive pole 9 and the negative pole 10 of the backup power supply network 2 behind the circuit breaker 28. The second auxiliary relay 32 has one break contact 33 connected between the positive pole 3 of the operating supply network 1 and the first the negative pole 4 of the operating supply network 1 and the second conductor 12 of the closing network. One make contact 35 of the second auxiliary relay 32 is connected between the positive pole 9 of the back-up power supply network 2 and the first start-up network conductor 11 and a second make contact 38 of the second auxiliary relay 32 is connected between the negative pole 10 of the backup power supply network 2 and the second start-up network conductor.

In Fig. 2, the second auxiliary relay 32 is replaced by a third auxiliary relay 37, which has a plurality of movable changeover contacts 38, 39, fixed break contacts 40, 41 and fixed break contacts 42, 43 instead of break contacts 33, 34 and make contacts 35, 38. The movable changeover contacts 38, 39 are connected to the first conductor 11 and the second conductor 12 of the switching network. The fixed break contacts 42, 43 are connected to the positive pole 3 and the negative pole 4 of the operating supply network 1 after the circuit breaker 5 of the operating supply network 1. The fixed make contacts 40, 41 are connected to the positive terminal 9 and negative pole 10 of the backup supply network 2 28.

In case of loss of voltage in the operating supply network

1, for example by interrupting the lead wire or by short-circuiting the lead wire, the coil of the first auxiliary relay 29 is de-energized, whose break contact 30 then moves to the on position shown. If the circuit breaker 5 of the mains supply 1 remains switched on, its auxiliary make contact 8 is also switched on and the coil of the second auxiliary relay 32 energizes. This opens the normally open contacts 33, 34 and the normally open contacts 35, 38 and the first conductor 11 and the second conductor 12 are switched from the operating mains 1 to the backup mains 2, leaving the basic functions of the switch unlimited. In the case of FIG. 2, the coil is energized by the first auxiliary relay 29 and switched on. its normally open contact 30 reaches the excitation of the coil of the third auxiliary relay 37. Its movable changeover contacts 38 and 39 connected to the first conductor 11 and second conductor 12 of the switching network change position, thereby breaking their contact with the fixed opening contacts 40 and 41 with the positive pole 3 with the negative pole 4 of the operating supply network lacquer making contact with the fixed make contacts 42, 43 connected to the positive pole 9 and the negative pole 10 of the backup supply network

2.

The basic functions of the switch will also remain unlimited. In the event that the loss of voltage in the mains supply 1 occurs as a result of the operation of the circuit breaker 5 of the mains supply 1, its auxiliary make contact 8 is in the open state shown, the auxiliary relay coil 32, 37 does not energize. the switching on does not switch to the backup power supply 2, the function of the circuit breaker 28 does not occur due to the same cause as the function of the circuit breaker 5 of the operating supply network 1 and the switch can be switched off by the backup control and blocking set 26. If the standby trip coils 14 operate by the standby control and blocking set 26 for reasons other than the loss of voltage in the operating power line 1, eg when the wire is broken in the circuit of the trip coils 13 of the trip, the coil of the first auxiliary relay 29 remains. energized, its break contact 3B is open, the coil of the second and third auxiliary relays 32, 37 does not energize and the first wire 11 and second wire 12 of the power supply network will not be switched to the backup network 2. .

Claims (2)

pRedmKt A circuit for supplying a switch control circuit, in particular with an electromagnetic input drive, comprising a positive and negative pole operating supply network with a circuit breaker having main contacts and at least one auxiliary make contact, a positive and negative pole backup supply network as well. a circuit breaker, a first conductor and a second conductor switching network, and auxiliary relays with coils with make contacts, break contacts and / or changeover contacts, the electromagnetic input drive having tripping coils for tripping with terminals connected directly to the negative pole of the power supply network and Positive pole of the operating supply network via the operating control and interlocking kit, the backup trip coil with terminals connected directly to the negative pole of the backup supply network and with the connections connected to the positive terminal of the back-up power supply by means of the back-up control and blocking set, the ignition coil with the leads connected to the first power supply line through the control and blocking set and the terminals connected directly to the second power supply network; a relay with terminals connected directly to the negative pole or second conductor of the respective network, characterized in that between the positive pole (3) and the negative pole (4) of the operating supply network (1j after the circuit breaker (5) of the operating supply network) relays (29), OF THE INVENTION whose break contact (30) is connected in series with the auxiliary make contact (8) of the circuit breaker (5J) of the mains supply (1) in the coil lead (31) of the second auxiliary relay (32) connected between the positive (9) and negative (10) ) a back-up power supply network (2) behind a circuit breaker (28j) having an NC contact (33, 34) connected between the positive pole (3) of the operating supply network (1j) and the first switch-on network (11) as well as between the negative pole (4) a power supply network (11) and a second power supply network conductor (12), and a make contact (35, 36) connected between the positive terminal (9) of the backup power supply network (2) and the first power supply network conductor (11), 10) a back-up power supply network (2) and a second power supply network conductor (12). 2. The circuit for powering the switch control circuit according to claim 1, wherein the third auxiliary relay (37) has a plurality of movable changeover contacts (38, 39) instead of the break contacts (33, 34) and the make contacts (35, 36). fixed make contacts (40, 41) and fixed make contacts (42, 43) connected so that the movable make contacts (38, 39) are connected to the first conductor (11) and the second conductor (12) of the closing network, fixed make contacts ( 42, 43) are connected to the positive pole (3) and negative pole (4) of the operating supply network (1) after the circuit breaker (5) of the operating supply network (1) and the fixed make contacts (40, 41) are connected to the positive 9) and the negative pole (10) of the backup power supply network (2) behind the circuit breaker (28).