SU951180A1 - Device for variable resistor contact quality control - Google Patents

Description

The first relay through the first diode and the closing contact of the first contact group of the measuring relay, and the second terminal of the second control winding to the second relay through the second diode, the short circuit contact of the second contact group of the first control relay and the disconnecting contact of the first contact Group of the measuring relay are connected to the second peak of the single relay an element that is connected via a closing contact of the first control relay to one output of the indicator lamp; the working section, the second output of which is connected to the negative source bus The power supply and through the disconnecting contact of the first control relay is connected to the second contact of the first contact group of the measuring relay, which is connected to the second control relay through the fourth diode and the closing contact of the second control relay. indicator lamp Reject and the first output of the winding of the third relay, the second output connected to the negative bus power source, and the second output of the key element through the flip contact of the contact group tr tego relay is connected to. the second indicator light lamp marriage

The drawing shows a schematic electrical diagram of the proposed device.

The device contains a source of constant voltage 1, a key element 2, the measuring relay 3, the movable contact 4 of the relay 3, the closing and opening contacts 5 and 6 of the relay 3, the first control relay 7, the moving contact 8 of the relay 7, the closing and closing contacts 9 and 10 relays 7, the closing contact 11 of the relay 7, the second controlling relay 12, the closing contact 13 of the relay 12, the third relay 14, the closing contact 15 of the relay 14, the indicator 16 The marriage, the indicator 17 Operating section, the elements of the operation delay: resistor and capacitor 18 and 19 on the first control relay 7, the resistor and The capacitor is 20 and 21 at the second control relay 12, the reverse conduction exclusion elements are diodes 22-25 and the motor connection terminal 26 of the variable resistor being tested.

When the checked variable resistor is connected to the terminals 26 of the slider and the key element 2 is closed, the voltage through the normally closed contact 8 and 10 of the de-energized first control relay 7 and the resistance of the contacting surface of the checked resistor goes to the measuring winding

relay 3 (for example, a polarized relay, type RP-7),

The movable contact 4 of the relay 3 presses against the contact 5, as a result of which, with a delay determined by elements 18 and 19, the power supply circuit of the winding of the first control relay 7 and the diode 24 of the measurement relay 3 close.

When the first control relay 7 is triggered, the indicator 17 is turned on. The working section, the signaling that the variable resistor engine is in the working section (winding),

5When short interruption

.Contact in the test resistor (0.001-0.3 s) the winding of the measuring relay, de-energizes, transfers the movable contact 4 to the contact b, and

the movable contact 8 of the first control relay 7, due to the release delay provided by the capacitor 19, does not have time to fall. The power supply circuit of the second control relay 5 appears through the normal closed contacts 4 and b of the measuring relay 3 and the closed contact 11 of the first control relay 7 .. The second control relay 12, is turned on. partially, connects the winding of the third relay 14 with the contact after the returning of the movable contact 4 of the measuring relay 3 to the contact 5 after a short interval of the gap of the brush. Relay 14 closes its contact 15 and

5 switches on its current winding for a permanent power supply and the indicator 16 Scrap.

After the contacts 4 and 5 of the measuring relay 3 are closed, the power supply circuit of the winding of the first control relay 7 is restored. Thanks

the release delay provided by the capacitor 19, contacts 8 and 9 of the first control relay 7 do not have time to open, and the indicator

5 17 The work area remains on.

The described mode of operation occurs when contact is broken.

Q is more than 0.001 s to the value determined by the circuit elements (0.3-0.5 s).

With prolonged loss of brush contact in the tested variable resistor (over 0.3-0.5 az, which is longer than the release time of the first control relay 7), the movable contact 8 of the relay 7 is released, the contacts 4 and 5 of the measuring relay 3 are in normally open state. This breaks

0 the power supply circuit of the winding of the third relay 14. The contact 11 of the first control relay 7 becomes again normally open, thereby disconnecting the winding of the second control relay 12 from

Claims (2)

5 sources of power. Indicator 17 Operating area and indicator 16 Marriage is turned off. . Thus, the proposed device allows reducing the controller fatigue, increasing productivity due to the possibility of using a multi-site installation and the quality of testing due to objectivity and accuracy of control. Apparatus of the Invention A device for monitoring the quality of contacting variable resistors, comprising a measuring relay, the winding of which is connected via a controlled resistor to a negative power supply bus whose positive bus is connected to the first output of a key element, a Scrap indicator light connected to the negative power supply cable , and a resistor with a capacitor of the first delay element, which is due to the fact that, in order to increase the control accuracy, two control relays, the third relay, the indicator lamp The working section, the resistor with the capacitor of the second delay element and four diodes, the control windings of the control relays are bounded by the corresponding delay elements and one output connected to the negative power bus, the second output winding of the first control relay through the first diode and the closing contact of the first contact group of the measuring relay, and the second terminal of the winding of the second control relay through the second diode, the closing contact of the second contact group of the first control the first contact group of the measuring relay is connected to the second output of the key element, which through the closing contact of the first control relay is connected to one output of the indicator lamp. The working section, the second terminal of which is connected to the negative bus of the power supply and through the opening contact of the first control relay -.the second output winding of the measuring relay, which through the third diode is connected to the closing contact of the first contact group of the measuring relay, which the fourth diode and the short-circuit contact of the second control relay are connected to the second output of the indicator lamp Brac and the first output of the winding of the third relay, the second output connected to the negative power supply bus, and the second output of the key element is connected to the second indicator terminal via the closing contact of the third relay contact lamp marriage. Sources of information taken into account in the examination 1. USSR author's certificate number 378780, cl. G 01 R 31/04, 1970. 2. Technical description of A1-18M 6FO.400.001.TU (prototype). 6 sixteen 17