SU725137A2 - Device for monitoring current presence - Google Patents

Description

A ment is connected to the output of an OR gate.

The drawing shows a j-cTipofiSt | va scheme for controlling current currents in phases in a multiphasic world: 31k ", where 1, 2, 3 are current sensors; 4 - for shipment; 5 - .idriftiedKHft eLe Ment OR; 6 - tr. 7 - PI element, 8 - lkJtk54eiBOH element; 9 - {LeIl converter of the period between the pulse MI IB analog signal; , 10 - resistor; // - a source of tension; J2 - KOHTaiKTOip; 13 - network access point manager; 14 - mouth new entry.

In the case when there are violations in the Movement sequence of phases prior to switching on the controller or when it is turned on, the next one works as follows.

In the initial state at the output of the operation XHiBHoro I1STOCHN1: ka 1n1p.phen, and // i-metsHUZKYI Wasted, the alternate value from source 13 through co-factor 12 and 1c to nainpiyaicy 4. Impulses ic of current sensors output 1, 2, 3 , a1M) the amplitudes of which are proportional to the current passing through m, the 31 HarpyysiKy 4 are sent to the logical element OR 5, and the ic output of the logical element OR 5 pulses with a frequency greater than 1 network frequency are fed to the input of the relay converter between impulses to apalotovy signal 9. Resistance between outputs The 01M relay converter 9 and the common wires 1VY1Soko, and 1the whole current from the operating source of the voltage // via the IRA receives the input to the control of the il2 contactor, holding it in the STATUS. So iKaiK in this case (the work of the device and the case of the Prosperity and the beginning of the development of the company and the start of the company. It is exactly for the IMMULA from the current sensor / current sensor YytulUs 1C sensor toika 2, from the sensor TSC 3 and Far away to pulse from the output of the TiSKa sensor. At the start of the pulse from the output of current sensor 1 to the trigger 6 input at the trigger output the enable signal appears which is dropping at 1po1Stu1P.Lo1N1Ii to another trigger input u: M1G1ul1: th output of the current sensor 2. Pulse from 3, post falling on the first bhbd element I 7, on the output element I 7 does not pass, since the second input element And 7 noicnynaeT prohibitory signal from the output of the trigger 6.. At the same time, the key key is off.

fipl; {b | pad ny, and at least one current at a time when the next npaiBH.ibiHdcTH alternation of 1f) 3 after switching on the device, the time between the pulses of the output of l6g increases, and that of the OR element 5, and this)

The transducer 9 to change its state. The output resistance between the common wire of the output of the relay converter 9 STA1N01EVIT1S and all current from the operative source: NI1ka // on MJfMaet} 5Cixddi1 (through the relay converter 9. The contactor 12 is de-energized and the load 4 is disconnected from the source of the mains voltage 13 To re-enable the device, it is necessary to send a signal to the setup input 14 of the relay converter 9.

In cases when violations of the phase sequence alternation, the place before switching on or during (Turning on the device, the work proceeds as follows.

The pulse from the output of the current sensor / is fed (to the input of the logic power supply. OR 5 and to the input of the trigger 6, while the output resolution of the trigger 6 is resolved by the resolving signal. As there is a "failure in the correct phase rotation, then the pulse from the sensor output current / follows IMP | pulse from the sensor 3 output. This pulse arrives at the first input of the element AND 7 and passes to the output of the element AND 7, since its second input is sent to the decisive sipnal from the output of tripipa 6. Pulse ic of the output element And 7 is fed to the input of the key element 8, the key element 5 B1 is turned on and its output connects the output of the logic element OR 5 to a common pinch, while the pulse coming from the current sensor 3 "and the input of the logic element OR 5 does not appear at its output, the time of the meliutsu pulse increases and the input of the relay converter 9, it changes the ovual state and connects the resistor 10 to the common bus, the contactor 12 is then de-energized and disconnected from the source of the mains voltage to the terminal 4. To re-enable the device, it is not necessary to reset the trigger 6 and the relay converter 9.

Ip.use of the haemo device offers protection of multiphase signals against the wrong number of iBo phases in all cases of switching the device on.

The economic effect from the use of devices is determined by the cost of multi-phase loads, which can be entered with the wrong phase alternation.

Claims (1)

Invention Formula Device for the control of current availability by author. St. No. 396783, characterized in that, in order to expand the functional potential of the device, by means of protecting the multi-phase load from incorrect phase rotation, tr; igger, element And key element, the outputs of the first and second current sensors are connected to the trigger inputs, and the third sensor output is connected to the first input of the And element, the second input of which is connected to the trigger output, the output of the And element is connected to the IK input of the key element, and the output of the key element is connected to the 1K output of the logical OR element.