SU742879A1 - Device for registering failures of electromagnetic relay contacting - Google Patents

Description

google elemets with adjustable nopoixiM qpa6aTbiDaHHa, two two-way pins, one-way pins, one output pins, and one output trigger through an amplifier that connects to the time of the connection of the tested relays, the one-way pins, and the output pins; To the secondary schools of the fail-over module, the load resistors are connected; the terminals to the test terminals of the test subject's contacts have been entered. odds strobe pulsator, a switch with three output-n and two-input control keys, one of the inputs of each of KOTOjDLix is connected to a terminal for connection ONE1X1 of the contacts of the tested relays, and the input of each of the two-input control keys is connected with one switch output with three outputs,

the other output of which is connected to the input of the register of failures, and the third output with kx: one 1 trigger, while the outputs of two-input controlled to / from pockets connected to the terminals of the single-plug connection of the tested relays are connected to the inputs of each of the threshold elements of an adjustable threshold, and the scheduling of each threshold element G is connected to one of the inputs of each of the three-way matching logic circuits by an adjustable threshold, each of which is connected to a triangle input, and to a third him - output of the shaper of pulses.

The drawing shows the structural scheme of the device described.

The device for testing electromagnet relays with windings 1 and with contacts 2 contains load resistors 3, two input controlled 1 pin 4, included in the contact circuit of the first relay, a two-input control switch 5, included in the contact circuit of the h -th relay, two-way controlled 6 and 7, connected respectively to the circuit of the first contact and the first relay, E (X.od amplifier 8 is connected to one output of the trigger 9, the input of which is connected to the output of the switch with three outputs 10. Output of the impedance generator 11 is connected inlet 4 RM5fOBa strobimpup body ") 12 whose output is connected to inputs trehsh-odovyh coincidence logic circuits 13 and 14, the other of said VK0DY trehvkodonk szhvpadeni logic circuits connected to the outputs 16 and pororovyh elementov15 with regularity vrue-

our thresholds of operation. The inputs for registering failures 17 are connected to the outputs of the switch 10 and the three-input logic circuits 14 and 13.

The device works as follows.

The pulses from the pulse generator 11 are fed to the pulse generator 12, and from it to the switch 10. After the switch 10 is started, the alternate contact status of the 2 contacts of the tested relays is performed. The voltages taken from pins 2, through two-input controllable keys 4-7 that perform the function of isolation, are fed to the inputs of threshold elements 15, 16 with an adjustable response threshold, and from them to the inputs of two-input matching logic circuits

13 and 14. On / other inputs of two-input logic circuits of coincidence 13 and 14, trigger 9 receives information about the presence or absence of voltage on the windings of 1 tested relay. The operation of two-input logic circuits matching 13 and

14 is resolved by strobe pulses arriving from the strobe pulse generator 12, which makes it possible to eliminate the positive triggers associated with transients during switching of the relays under test and during the transition to the switching voltage from one state to another,

In case the contact state does not correspond to the state in which the tested relay should be located, the two starting logic circuits of coincidence 13 or 1 4 give a signal that there is a failure and it is registered by the p & 17 unit. Information about the number of the relay that gave failure, comes from the switch .19, and information about whether the failure occurred when the relay tripped or triggered 9 or released.

At the end of the full cycle of the switch 1O, the state of the trigger 9 changes to the opposite state and a deactivation of the tested relays takes place, after which the cycle is repeated under the new regla state.

Thus, the number of threshold elements and logic circuits in this device is equal to the number of contacts of a single relay and does not increase with an increase in the number of shaky timed relays, which allows to simplify and cheapen the instrumentation used in testing relays.

Claims (3)

1. USSR author's certificate number 293306, class, N. O4 M 3/22, 1969. 2. USSR author's certificate number 495788, cl. H O4 M 3/22, 1974. 3. USSR author's certificate number 457184, cl. H 04 M 3/22, 1973.