SU1536363A1 - Device for control of sequence of switchings of power supply sources - Google Patents

Abstract

The invention relates to electrical engineering and can be used to control and control power sources when it is necessary to turn them on and off in a strictly defined sequence. The purpose of the invention is to enhance the functionality by ensuring the power supply is turned off in the reverse order of turn-on sequence. The essence of the invention is that the device containing N power sources, N switching relays, N control relays and a switch, additionally introduces J-1 diodes and connections between the relays, which block the switching relays and the required order of power supply deactivation. 1 il.

Description

The invention relates to electrical engineering and can be used to control and control power sources when it is necessary to turn them on and off in a strictly defined sequence.

The purpose of the invention is to expand the functionality of the device by ensuring the power supply is turned off in the reverse-turn-on sequence.

The drawing shows the circuit diagram of the proposed device for four power sources (in general, there can be any number of them).

The device contains power supplies 1-4, switching relays 5-8, controlling relays 9-12, switch 13, diodes 14-16. The inputs of each i-ro (l) source 1-4 of the power supply are connected to terminals 17 of the primary source of alternating voltage via normally open contacts of the 1st switching relay 5-8, respectively, and the first terminals of the windings of the switching relay 5-8 are connected to the negative pole of the primary source 18 constant voltage. The terminals of the windings of the control relays 9-12 are connected to the outputs of the power supply units 1–4, respectively. The cathode of the first diode 14 is connected to the second terminal of the winding of the first switching relay 5 and through the first closing contacts of the second control relay 10 is connected to the positive pole of the primary constant-voltage source 18. The cathode of the j-ro (2 j 4) diode is connected to the anode of the (j-1) -th diode, respectively, through the second make contacts (j-l) -ro control

with

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a second relay winding j-ro switching relay and through the first closing contact (j + 1) -ro control relay with a positive pole of the primary source 8 constant voltage. The anode of the diode 16 is connected via the second closing contacts of the control relay AND to the second output of the coil of the switching relay 8 | And through the switch 13 it is connected to the positive pole of the primary source 18 of constant voltage.

The device works as follows.

In the initial state, all contacts of all relays and switch 13 are open. To turn on the device, close the switch 13. When closed, the switch 13 must first start operating the power supply 1. The relay 5 operates and supplies alternating voltage to the source 1. Then the control relay 9 is activated and switches on the switching relay 6, which in turn turns on the power supply 2. When the power supply 2 is turned on, the control relay 10S is activated, which blocks the switching off of the switching relay 5 and turns on the following switching relay 7 ". Thus, all switching relays 5-8, sources 1-4 of power supply and control relays 9-12,

If one of the power supplies fails, for example, 1, there is no voltage at its output and the corresponding control relay 9 is turned off. This leads to the successive disconnection of the switching relay 6-8 and the power supply sources 2-4.

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When the switch 13 is opened, the switching relay 8 is first disconnected, since the shutdown of all other switching relays 5-7 is blocked, the power supply 4 and the control relay 12 are turned off. The switching off lock of the switching relay 7 is removed, which causes the power supply 3 to turn off and then all power supplies and relays.

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Thus, when the switch 13 is closed, the power supply sources are sequentially turned on in sequences 1, 2, 3, and 4, and when the switch 13 is opened, the power supply is turned off in the reverse order of switching on.

Claims (1)

Claims An apparatus for controlling a power supply sequence comprising n power sources whose outputs are connected to the load terminals, n switching relays, n control relays, and a switch, the inputs of the 1st (1 i 1 n) power source are connected via make contacts The 1st switching relay to the terminals of the primary source of alternating voltage, the first terminals of the windings of the switching relays are connected to the negative pole of the primary source of direct voltage , the outputs of the 1st control relay of the 1st power supply are connected to the outputs of the 1st power supply, characterized in that, in order to extend the functionality by ensuring the power supply is turned off in the reverse sequence. on, it additionally contains p-1 diodes connected in series, with the cathode of the first diode connected to the second terminal of the winding of the first switching relay and connected through the first closing contacts of the second control relay to the positive pole of the primary constant voltage source, cathode j-ro ( 2 Ј з Јп-1) of the diode is connected to the anode (diode, through the second closing contacts (j - l) -ro of the control relay with the second output of the winding j-ro of the switching perfe and through the first closing contacts (jH) -fo of the controlling relay with positive n By the voltage of the primary DC source, the anode of the (nl) -ro diode is connected via the second make contacts of the (p-5) th control relay to the second output winding of the n-th switching relay and through the switch with the positive source of the primary source wives ,, § I I I 7 i i i i z 13 17 18