SU834616A1 - Device for testing realy switching electric apparatus - Google Patents

Description

(54) DEVICE FOR CONTROL OF RELAY SWITCHING ELECTRIC EQUIPMENT

The invention relates to electrical measuring technology and can be used to control electrical switching equipment built on electromagnetic relay elements. A device for monitoring relay switching equipment is known, comprising main and additional power sources, switching keys, indicators of monitoring the state of relay elements and indicators of monitoring false circuits and switching, which allows the operation of the relay elements to be checked and to detect false connections between E PJ. The disadvantage of this device is the inability to control the diodes shunt the windings of the relay elements. The closest in technical essence to the present invention is a device for monitoring burdock switching equipment comprising a control unit, a switch, sensors of monitored circuits connected to a switch, and a troubleshooting unit L. The disadvantage of this device is the inability to directly test diodes, shunt The coil winding relay elements, which reduces the functionality of the device. The purpose of the invention is to extend the functionality. The goal is achieved by the fact that in a known device containing a software control unit NIN, a switch, a control unit consisting of sensors of controlled circuits and a troubleshooting unit, the output of the control unit is connected to the input of the program control unit, the first output of which is connected to the first input of the switch, the outputs of which are connected to the first inputs of the control unit, the second inputs of which are connected to the corresponding outputs of the program control unit, a generator of different-field impulses is introduced The logic block, the display block and the resistor, the control output of the program control block are connected to the input of the generator of discrete pulses, the output of which is connected to the first input of the logic block and through a resistor to the second input of the switch and the second input of the logic block, the first output to topdro with the input of the display unit, and the second output of the logic unit is connected to the third input of the control unit. The testing of shunt winding diodes for relay elements is based on a comparison of the short pulse effective on the RL circuit and the response of the Rb circuit. . The drawing shows a block diagram of a device for monitoring relay switching electrical equipment. The device contains a software control unit 1, a control unit 2 consisting of sensors of the state of monitored circuits and a troubleshooting unit, a switch 3, a 4-pulse generator, a logic unit 5, a block 6 indications, resistor 7 and object 8 control. The device works as follows. In the initial state, the generator of polarized pulses 4 is in the standby mode, there are no pulses at its output, information in the control unit 2 and the display unit 6 are not received from the logic unit 5. According to the program entered into the control device with the help of block 1 of software control, through switch 3 from the control object 8, a controlled circuit is selected that contains a winding of a relay element bounded by a diode and connected to the second input of the logic block 5. Thus, programmatically an RL-circuit is formed, consisting of a resistor 7 of the controlled circuit (winding of the relay element, diode bridged), Next, from the software control unit I, a pulse is applied to the generator 4 of different polarity pulses a, during which the generator finds with in the on state. The generator of bipolar pulses forms a series of alternating short (tj |, 64 3 msec) positive and negative pulses spaced apart in time (the pause between adjacent positive and negative pulses is -t pauses 5 msec). The multipolar signals arrive at the first input of logic unit 5, and the responses of their responses, taken from the monitored circuit, go to the second input of logic unit 5. Logic unit 5 processes the received information, and depending on the integrity and correctness of the diode installation, a signal is generated at its output Norm or Marriage entering block 2 of control, which, acting on block 1 of program control, provides the possibility of further verification or its termination. In addition, information from logic unit 5 in the form of signals Norm, short circuit, Open circuit, switch polarity goes to display unit 6, which, when detected in the inspected object 8 control of a faulty diode, shunt the winding of a relay element, uniquely allows you to determine the type of failure diode. If the shunt diode is in good condition and installed correctly, when a positive field impulse is applied to a circuit consisting of active resistance and an inductive load shunted by the diode, almost the entire amplitude of the impulse is applied to the inductive load at the initial moment of time, and when an impulse is negatively impacted polarity A diode bypasses an inductive load and a voltage divider is formed, consisting of a series-connected active resistor and an open diode resistance. Choosing a resistor nominal much NW-10 times) is greater than the resistance of an open diode, on an inductive load a low voltage level appears. At the same time, positive and negative pulses with a voltage level equal to logical zero arrive at the first input of the logic unit 5. Logic block 5 processes the incoming information and at its output a Norma signal is generated, which enters control unit 2 and display unit 6. Unit 2 controls

58

provides the possibility of further verification, and the display unit 6 confirms the health of the diode (the Norma transparency lights up).

Consider the operation of the device kontrop when the diode is broken In this case, both inputs of the logic unit 5 receive positive and negative pulses with a voltage level equal to logical one.

The Scrap signal from the logic unit 5 enters the control unit 2 and further checks are terminated, and in display unit 6 also from the output

-P.

- Diode is OK

G

TG

-P.

-L

JTU

L.

gh

L

; Short circuit diode

TG

Note. L is a positive polarity pulse with a logic level of 1.

Claims (1)

and - negative polarity impulse with a logic level J - positive polarity impulse with a logical level and - negative polarity impulse with a logical level O. Invention formula A device for controlling relay switching electrical equipment, containing a program control unit, a switch, a control unit, soy -., Pulses, the output of which is connected to the next of the sensors of the state of the kentro-first input of the logic unit and the interleaved circuits and the search unit is a nonresistant resistor - with the second input of the compressors, the output of the co-mutator control unit and the second input of the logical Dinen with the input of the software control unit, the first output of which is connected to the first input of the switch, the outputs of which are connected to the first inputs of the control unit, the second inputs of which are connected to the corresponding outputs of the software control unit, characterized in that, in order to expand the functionality of H) 1x capabilities, it introduced a generator of different polarity pulses, logs 6, b logical block 5, a diode breakage signal is received, and a banner indicating a breakage of the diode lights up on the display panel. The operation of the control device in case of faults of diodes of the type KZ, and of the polarity are similar, Depending on the integrity of the diode and the correctness of its decoupling, the possible reaction of the RU circuit to the impact of the impu is shown in the table, both in positive and negative polarity. Norm Open diode Marriage Shuffle the diode Marriage a cusk block, a display unit and a resistor, the control output of the program control unit is connected to the generator input of different polarities, the first output of which is connected to the input of the display unit, and the second output of the logic unit is connected to the third input of the control unit. Sources of information taken into account in the examination 1. The author's certificate of the USSR No. 394738, cl. G 01 R 31/02, -1971. 2, USSR Author's Certificate No. 393700, cl. 6 01 R 31/02, 1970 (prototype).