SU416779A1 - - Google Patents

Description

one

This invention relates to electrical measuring technology.

The known devices for testing vacuum relays, which contain measuring blocks (measuring circuits with test items and ignition pulse generators), a software block with a master oscillator, a power supply unit, voltage and current meters, have insufficient reliability in detecting failures when the pulses are applied to the input and spontaneous surfs.

In order to increase the reliability and automation of the test process, the proposed device is spabge with regisgratsin blocks of spontaneous breakdowns and registration of failures made in the form of a mismatch valve, a static trigger and a trigger status indicator with the executive relay, as well as a coincidence circuit, a pickup sensor and a firing sensor. momentum. The pickup sensor is connected to the main input of the mismatch valve spontaneous breakdown unit, with the prohibitance input of the spit valve mismatch of the malfunction registration unit and the first input of the coincidence circuit, and the firing pulse formation sensor - with the input of the prohibition of the mismatch valve spontaneous registration unit

2

of breakdowns, with the main input of the failure valve of the failure detection unit and the second input of the coincidence circuit. The outputs of the registration of spontaneous breakdowns and failures with the help of the contacts of the executive relays are connected to the program block.

FIG. 1 shows the block diagram of the proposed device. in fig. G - complete electric circuit;:. Ms I1: gl block.

The device with::; - bursts a progrg.mny unit with a master oscillator 1, power supply unit 2, 3 voltage and current meters, 1: measuring units 4-b, blocks 7-9 for recording self-breakdowns, blocks 10-12 registration 11esrab; 1tupyv and coincidence schemes 13- i 5.

A software unit with a master oscillator is a known circuit (it can be performed, for example, on spider finders with a set of executive relays and signal lamps, with a pulse counter, an electric motor equipped with a contact device) and cures the tested relay 6 under voltage, to which the charge) accumulative capacitors 17 from the power supply 2, periodic start of the ignition pulse generators 18, the inclusion in a certain sequence of the measuring blocks 4-b and execution for

of a given number of inclusions, disconnection of one or another measuring contras from power supply in the event of unwelcome or spontaneous breakdown of the tested relay and device stop with the issuance of light and sound signals, after the entire test program has been fulfilled.

RT-meters for voltage and current, in which quality kilovoltmeters are used. voltage dividers and oscilloscopes, monitor voltage and current testing in measuring units 4-6.

Each measuring unit contains a pulse generator 18 and a measuring circuit IS.

The ignition pulse generator 18 consists of a storage capacitor 20, the discharge circuit of which includes a current transformer 21, an impulse formation sensor 22, a pulse inductance 23, a capacitor 24 with inductance 25 and a pulse transformer 26, the secondary winding of which is connected to a vacuum electrode. spark relay 16.

Measuring koptur 19 vypolpen of the storage capacitor 17 and the test relay 16 with inductance and resistance. On the day of the discharge of the capacitor, on the Rogovsky pickup sensor 27.

To the measuring unit, through the device, the device 28 of the sensor 22 and the device of the device 29 of the sensor 27 and the switches, the unit 7 of the registration of emergency breakdowns and the unit 10 of the registration of failures, each of which is made of a valve 30 of faults, a static trigger 31 and an indicator, are formed. The oracle of the state of the trigger 32, as well as the circuit,; and the coincidence 13, is made in the internal power unit coincident 33, the forming unit 34, and the pmiuls counter 35. 1.-1nDicators of the coaxial trigger 32 are connected to the actuating relay 1 by contacts of the program unit 1.

The device works as follows. When supplying the supply voltage, the storage capacitors 20 of the generator i8 of igniting pulses and storage capacitors G / of the measuring kopturs 19 are charged from the power supply 2. When switching on the irogram unit 1, I set the generator of this block at certain time intervals that ensures the operation of the generators by igniting their pulses from the measuring blocks 4-6 in the determined sequence. In this case, the forced time between two actuations of one measuring unit (naprmer, 4) is used to conduct switchings on other measuring units (5 and 6).

When the switching element is switched on, the accumulator capacitor 20 of the corresponding measuring unit is discharged through elements 23-26 of the ignition pulse generator, impediment and secondary cover of the transformer 26 forming the ignition pulse. At the same time, the ignition pulse forming sensor 22, through the forming device 28, sends a signal to the input of the inhibitor; a lazy fault of the mismatch valve 30 of the regenter-7 unit of self-arising breakdowns on the OS;

block 8 is a registry of pesrabatyvapy and a coincidence 33.

The storage capacitor 7, charged from the power supply 2, is discharged through the test relay 16 when it is triggered in

moment G1o.ta; and ol pulse of the igniter impeaters 18. At the same time, the sensor 27 triggers via the option: (ira; other device 29 sends a signal to the main input of the mismatch valve of the spontaneous breakdown registration unit 7, pas prohibition input 5-30 of the mismatch of the registration unit 8 failures and on the scheme is the same 33.

If there are impulses from the sensors 22 and 27 (which corresponds to the normal operation of the relay and the ignition pulse), there are no pulses at the output of the non-dispatch valve 30, the output pulses are generated at the output of the coincident circuit 33, counting counter meters 35.

In the case of spontaneous sampling of the tested relay, a pulse appears only at the output of the response sensor 27. This pulse passes through the gate 30 of the wake block of the spontaneous breakdown recording unit 7 (since there is no signal at the input of the indicated voltage) and the trigger 31 turns off the actuator of the state indicator of the trigger 32 turns on the alarm of the spontaneous world and the switch of the program block 1 is disconnected. terminated. In the case of 1 test, the test relay

when the ignition pulses are applied at the output of the response sensor 27, the pulse is absent, the pulse from the ignition pulse sensor 22 also goes through the mismatch valve 30 of the non-operating recording unit 8

(since there is no signal on the input of the prohibition of the point of inconsistency) and Ti.irrep 31 overturns it, through the actuator of the state indicator of the trigger a failure is activated

and, as in the case of spontaneous breakdown, the further testing of the rejected relay is discontinued. Both during sand processing and during sa: a continuous breakdown, the signal will appear only on one pass from the circuit 33 inputs.

coincidence, and the count of the number will not work.

When a given program is executed, unit 1 stops the test device with the light and sound sigilization turned on.

Subject of invention

A device for testing vacuum spark relays, comprising a software unit with a master oscillator, a power supply unit, voltage and current meters and measuring units consisting of a measuring circuit and an ignition pulse generator, characterized in that it is equipped with detection units to increase reliability spontaneous breakdowns and registration of failures, made in the form of a mismatch valve, a static trigger and a trigger status indicator with the executive relay, as well as a coincidence circuit, sensor operation of the ignition generator and the sensor; the trigger sensor is connected to the input of the mismatch of the spontaneous breakdown registration unit, the mismatch valve prohibitance input and the first input of the coincidence circuit, and the ignition pulse formation input of the valve prohibit switch spontaneous breakdowns, with the main input of the non-coincidence valve of the failure detection unit and the second input of the coincidence circuit; the outputs of the spontaneous breakdown and non-operation recording units are connected to the program unit via the contacts of the executive relays.