SU1220006A1 - Power supply system with check and protection - Google Patents

Abstract

The invention makes it possible to increase the reliability and speed of protection of the power supply system with control and protection. In addition, it provides automatic recovery after the disappearance of an unacceptable change in the output voltage of the stabilizers and disconnecting the power from the system after a certain time if the indicated voltage changes do not disappear. This is achieved by the fact that when the output voltage changes above the norm, the actuating element 12 of the protection unit 4 is activated. At the same time, through the matching unit 8, a signal is sent to the block 9 with a time delay and the node 9 starts to generate pulses. If the voltage deviation is long-lasting, the shut-off element 1 is triggered and the system is turned off. The delay time is determined by the location of the tripping body in the on state. state, and the pulse duration of the node 9 determines whether the shut-off element 1 is in the off state. silt from € (L 05

Description

The invention relates to electrical engineering j, in particular, to systems for controlling electrical quantities, and can be used in power supply devices for radioelectronic equipment

The purpose of the invention is to improve the reliability and speed of protection while ensuring automatic recovery after disappearing an unacceptable change in excess voltage of stabilizers and ensuring disconnection of power from cHCTetaJ after a certain time while the stabilizing voltage of stabilizer does not disappear.

The drawing shows a functional electrical circuit of the power supply system with control and protection.

The device contains disconnecting organ 1 with contact 1 {1: 1m actuator connected by one output to the input supply terminal, block 2 of constant voltage regulators; block 3 of control, block 4 atshnty, and the control block is made in two groups of diodes 5 and 6 and dividers 7 directions, block 8 matching j junction block 9 with a time delay and block 10 one-shot. The output 11 of the negotiation unit 8 is the output of the fault control signal. The protection unit consists of a semiconductor actuator 12 and has first 13 and second 14 control inputs and a control output 15,

The device works as follows.

In the normal mode, the contacts of the shut-off element are closed, the actuating element 12 of the protection block 4 is in the open state, and at that, they have no effect on the operation of the stabilizer block 2

When increasing or increasing: singing more than HopNjb of one or several output voltages of stabilizers 2 by means of divider 7 and groups of diodes 5 and 6, respectively, control inputs 13 or 14 receive a triggering signal (2nd element 12 of protection block 4). The matching unit 8 also receives a signal from output 15, as a result of which a signal is sent to node 9, pos20006 2

the latter, with some delay in time, begins to generate impulses. If the output deviation is short-term, after its disappearance, 5, the actuator 12 will return to the initial state, i.e. will open again. If the time deviation of the output voltages is greater than the tripping time

body

then the last one works and

disconnects the power from the block 4 protection and, accordingly, block 2 stabilizers. The delay time determines the onset of the shutdown of the organ in the on-off state, and the pulse duration of the node 9 determines the location of the shut-off organ 1 in the locked state,

So 5 from node 9 through

The one-vibrator unit 10 is supplied to the disconnecting organ 1 by a sustained signal and the disconnecting organ 1 is discharged for the time determined by the duration of the signal. This removes the power supply.

Hgaprina with input block 4 protection. After that, the shut-off device I is turned on, the voltage is fed to the input of the protection unit and the device is triggered. If a

while eliminating the cause of the power failure of the voltage stabilizer unit 2, the operation of the entire device is fully restored. If this did not happen. that

A device shuts down again. The block 10 one-shot produces a count of the number of inclusions of the device. Upon reaching the specified number of inclusions ()

The system-ter-Dji power supply device is disconnected from the mains through the block 10 of the one-shot and the block: - protection. The shut-off element 1 in this case remains in the activated

At the same time, when opening the approval block, terminal 11 will signal a malfunction of the power supply system-jb,

Thus, the introduced means allow to increase the reliability of protection to its speed 5 and also to provide automatic recovery after disappearance.

unacceptable changes in the output voltages and to ensure the power supply to the system is disconnected after a certain time, while non-disappearing unacceptable changes in the output voltages of the stabilizers.

Claims (1)

Invention Formula The power supply system with control and protection, containing a block of voltage regulators, a shut-off element with a contact actuator included in the power bus and connected by one output to the input supply lead, and a control unit whose input cables are connected separately to the common bus to the output the conclusions of the stabilizers, characterized in that, in order to increase the reliability and speed of the protection while ensuring automatic recovery after unacceptable changes in the output voltage of the stabilizers and ensuring disconnection of the power supply from the system after a certain time if the output voltage of the stabilizers does not change, the protection block with a semiconductor actuator connected between the other output of the actuator of the shut-off element and the supply terminal of the regulator Compiled by O. Ovs ednikov N. Tupitsa Tehred L. Proofreader L. Pilipenko Order 1323/54 Circulation 836 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Ra vice embankment, 4/5 Branch PPP Patent, Uzhgorod, st. Project, 4 20006 bilizator OB, with two control inputs and one control output, a matching unit, a block with a time delay and a single vibrator block, and the control unit is designed as voltage dividers for the number of stabilizers connected separately with respect to the common bus to the input terminals of the specified block, and 10 two groups of separation diodes, in one of which the combined cathodes are connected to the first control input of the protection unit, and in the other - the combined anodes are connected to the second 15 to the control input of the protection unit, and the other outputs of the diodes in each group are individually connected to the middle terminals of the indicated voltage dividers, while the control output of the protection block is connected to the control input of the matching unit, the power output of which is connected to the indicated other output the actuating element of the shut-off organ, and the output, which is the output of the malfunction control signal, is connected to the output of the blocking unit with a time delay, the output of which is connected to the input of the one-vibrator unit, the output of which A po 30 of the common bus is connected to the control input of the shut-off organ.