SU603019A1 - Stand for testing relay devices - Google Patents

Description

(54) STAND FOR CHECK

RELAY DEVICES

The invention relates to the field of electrical engineering, in particular, to devices for automatically controlling the operability of the installation and the correctness of operating relays.

Known stand control distribution boxes USKM-15OS13. This stand contains a program input unit connected to the control and display unit and through the corresponding DSh1 and DSP decoders with a switch that connects the control object to one of the inputs of the comparison circuit, the second input is connected to the program input unit through the VSH reference decoder. The control results are sent to the digital printing machine TsPM-1 and to the control and display unit, allowing or prohibiting further work of the stand. The self-control unit is connected to the control unit and the switch.

The drawbacks of the test bench lie in the low reliability of the verification of the item being monitored, since the test bench is self-controlled not in the process of the test bench, but before the start of control tests.

and after their completion, which ultimately reduces the performance of the stand:

a large number of episodes, a hitch on one output terminal of stand-4, the relay from the boiler / bus is in the switch cell, and two in the comparison circuit cell, a large number of contacts (two-twenty) per output terminal CTJ | H .

Also known is a stand for testing burdocks, in which the indicated disadvantages are partially eliminated (the comparison circuit cell is made on a zener diode and a diode) 2.

This bench contains a switching unit, to the inputs of which the tested product is connected, a control unit, a decoder and signaling elements, and between the switching units and the decoder there is a comparison unit, made on diodes and zener diodes, the cathodes of which are pairwise combined and connected to a negative terminal through a signal box. nutrition To the anodes of the Zener diodes is connected a reference signal generator, p anooy of the ropes are connected to the switching side,

Oinako and in this circuit there is no self-monotropy during the work of the stand, which reduces the consistency of checking the control of the output, and the output of the tende also has a large number of ten turnips).

The chain to increase the reliability of the verification of controlled items. In the prepaired stand for checking the burdock devices, an additional decoder is inserted, connected to the input of the program, the control object and the switch, and the measurement side, and the fault lock is inserted into the measurement unit.

FIG. 1 is a block diagram of a prepaxam bench; FIG. 2 is a simplified schematic diagram.

The block diagram consists of block 1 of input 20 of the program, connected to the side 2 of control and through the corresponding 3n 4 decoders to the switch 5 and the side of the comparison, the side 7 of the measurement object 8. The decoder 9 is connected to the side of the 35 input of the program , the control object 8, the switch 5 and the measurement side 7, one of the outputs of which is connected to the comparison unit 6 through the decoder 10.

Ia simplified schema30

(Fig. 2) all output points of the object of the tilt 8 through the normally closed contacts ll-ljfll-n, the relay blocking with its contacts l3-l-irl3, and the contacts 1 14-T1 of the relay IS-ltlS-n, 35 blocking contacts 16 -1 rilS-T 5gcell 17-1 fi 17-ti switch 5, connected with anodes of zener diodes 18-1-18-11, the cathodes of which are connected to the cathodes of diodes 19 1 -: ;; 19-TI and 2O-1-g-, 2ОT1 40 bulbs, respectively, of unit 6 comparison. Measuring The complete circuit 7. is connected to the control object 8 and the switch 5 through contacts 21-1 21-t1 of the decoder 9 and to the comparison circuit 6 through the contacts 22-1-g of the decoder 1O and contains a fault latch 23 and an ohmmeter (megger) 24, which are connected to the corresponding peshifrator 9 and 1O through the contacts 25-1, 25-2 and 26-1, 26-2. The unit (| deactivation of malfunctions 23 contains a self-exciting multivibrator 27, the outputs of which are connected through diodes 28 and 29 to the first inputs of the AO and 31 amplifiers and to the inputs of the decoders 9 and 1O through the keys 32 and 33, the control outputs of which are red through pulse shapers 34 and

35 connected to the outputs of the multivibrator n other ways amps. From the outputs

36 and 37 take signals, characterized by -

The state of the monitored mounting and measuring circuit.

Stand for testing relay devices works as follows. In the initial state, all contacts of the decoders 9 and 10 are open, the multivibrator 27 generates. When the fault-fixing elements are in good condition, the outputs 36 and 37 appear to be pulsed signals taken from the right and left outputs of the multivibrator through the amplifiers 30 and 31, respectively. With one type of malfunction, the amplifiers of the ES and 31 ip when the multivibrator fails, when there are single signals at the same time on its inputs, constant signals appear on outputs 36 and 37. With a different nature of the malfunctioning of the amplifiers 30 and 31, or when the multivibrator fails, when its outputs simultaneously have the signals O at the outputs 36 and 37 there are no signals. In this way, a check is made of the elements of the fault lock in the initial position.

To check the circuit in the control object 8 connected to, for example, to the 2O-1 and 2O-I-1 pads, the program recorded on punched tape is closed by pins 22-1 and 22-2 (decoder 1O, 21-1 (or 21-2 ) Take (Rotor 19 and pins 25-1 and 25-2, A single signal from the right output of the multivibrator is fed to the input of the amplifier 31, check its performance and to the input of the driver 35, which produces a pulse of less duration than the pulse width of the multivibrator, fed to the input of the key 33, lock it. Then through the light bulbs 20-1 and 20-2, diodes 19-1 and 19-2, closed contacts 2 2-1 and 22-2 of the decoder 10, the closed contacts 25-2 of the measuring unit, the public key 32 is fed to the input of the amplifier 30. At the output 36, a signal with a duration equal to the pulse width of the driver 35 is output. Thus, the condition of the chain of elements from URHT. Of the input of the amplifier ZO. After the pulse of the imaging device 35 ends, the key 33 and the signal O from the left output of the multivibrator through the diode 29, key 33, contacts 25-1 of the measuring unit 7, contacts 21 (or 22-2) of the decoder 9, tested circuit and closed contacts 11-1, 14-1,. cells 17-1 and the same contacts of the cells 17-2 of the switching unit 5 through the zener diodes 18-1 and 18-2 go to the cathodes of the diodes 19-1 to 19-2, locking them. The same signal through, diop 29 records your league in clause 31 on the air input. Then, with a healthy circuit at output 36, the signal will be absent. If the tested circuit in the control object 8 is interrupted, then the diop 19-2 (epi 19-1) with contacts 21-2 closed with signal O from the multivibrator will not be closed and Uf ,, through the circuit 20-2, diode 19- 2, contacts 25-2 of the malfunction block 7, the key 32 arrives at the input of the receiver 30, at the output 36 a signal appears. Similarly, when a single signal appears at the left output of the multivibrator, the operability of the AOR amplifier, the operability of the element chain from to the input of the amplifier 31, the health of the Zener diodes 18-1 and 18-2 of the comparator unit and the control of the circuit to be monitored absence or presence of closure. The processing of the pulse signals from the outputs 36 and 37 to determine the location and character of the malfunction is carried out by known methods, for which you can additionally use the signals from the outputs of the multivibrator and the formation of pulses. Measurement of resistance in the contouring of the object is carried out by an ohmmeter (megger) 24- according to the appropriate command, at which contacts 26-1 and 26-2 of the measuring unit 7, which connect the measuring device to the control object, close. At any point of the object. Control .8 with kYSYyta. A: relay devices for operation can be supplied plus or minus a power source of 27 V. A power source of 27 V is supplied as follows. According to the okmanda recorded on a punched tape, from the decoder 3 a signal is sent to the relay 12-1-turnips is triggered and through its contacts 13-1 it becomes on the lock,

and 2. I and the switching contacts 11-1 connect the common bus plus the power supply to the point of the test object. The power supply plus is fed to the point in an analogous manner, and the signal to relay 15-.J comes from decoder 4. The proposed stand test circuit for relay devices allows self-control during the inspection of monitored products, which improves the reliability and performance of the control. The number of contacts per output terminal of the stand has been reduced to eight. .F o rm a t it 3 about the stand, Stand for testing of relay devices, containing a program input unit connected to the control unit and through appropriate decoders to the measurement unit, the comparison unit and the switch, and the unit connected to the intent block via a switch that is connected to the control object, so that, in order to increase the reliability of the control, a supplementary decoder connected to the program input block has been inserted into it, switchboard and measuring unit in measuring BpoCom additionally introduced retainer peis-rectified. Sources of information taken into account in the examination: 1. Means of control of electrical networks of petettol devices used in the production process, Scientific Research Institute of Technology and Production Organization NIAT, 1968, p. ZO. 2. Authors certificate of the USSR 434531, And O2 H 1 / OO, 1972.