SU1224791A1 - Revolution relay - Google Patents

Abstract

The invention relates to the field of automation and can be used to provide a given technological mode of operation of power generating units. The purpose of the invention is to expand the range of application of the speed relay, which is achieved by using two-input command bodies in the speed relay with two independent channels for switching on and off the reference signal, as well as a switch for setting the signal values. The speed relay contains a series-connected coding frequency converter for shaft rotation and a switch for setting values for the shaft speed signal, two channels of setpoint connected in parallel, the enable and disable signals of which are supplied to the corresponding trigger inputs of the command elements. 1 hp f-ly, 2 ill. (L to tsD 4 ;: WITH

Description

The invention relates to automation and can be used to provide a given technological mode of operation of power generating units and protect them from abnormal cuts.

The purpose of the invention is to expand the range of application of the speed relay.

FIG. 1 conventionally shows one setpoint channel of a setpoint unit, without a switch, in FIG. 2 - the same, with a switch in the relay circuit.

The speed relay contains a pulse frequency sensor 1 of the shaft. Connected to the input of the register 2, periodically zeroed by a 3-pulse generated timer, and forming together with these blocks an encoding frequency converter of rotation. The code outputs of the register 2 are connected to the inputs of the first and second decoders executed in conjunctors 4 and 5, and the decoder 4 is connected through the first pulse shaper 6 to the input circuit of the command body 7, which ensures the inclusion of the executive bodies of the technological system ticks of the power unit, and the decoder 5 through the inverting driver 8 made in the form of a signal expander is connected to the input circuit of this node, which ensures the shutdown of the mentioned organs, the parameters of the drivers 6 and 8 being selected as the pulse duration is not less than the response time command authority-7, which uses a two-position polarized relay with a trigger characteristic.

By the time of start-up of the power unit at the outputs of the decoders 4 and 5, the level of logical unit is established.)

as a result, the output of the imager 6 will also set the level of logic 1, and the output of the inverting, imager 8 will be the level

logical O, by virtue of which from the code of this shaper the relay 7 winding the control circuits of the actuators of the power automatic control unit of the power unit will go into the winding of the power unit, the current controlling the contact system of this relay will go, and the next turn of the frequency will increase setting value corresponding to

Sh

15

20

25

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When the setpoint signal is turned off, the output of the decoder 5 begins to generate a logic signal O, as a result of which the current through the winding I of relay 7 stops, but its contacts (not shown) keep the position of the setpoint off signal. With a further increase in the rotation frequency and the achievement of its setpoint value at the output of the decoder 4, a logical signal is generated, as a result of which a current flows through the main winding of the relay 7 and its contacts switch to the position of the activation signal. With a subsequent decrease in the rotation frequency to its value 5 of a smaller setting value, the current through the main winding of the relay 7 stops, but the relay contacts remain in the on position of the setpoint signal. With a further decrease in the rotation frequency to the value corresponding to the disconnection of the setpoint signal, the output of the decoder 5 will be set to logic level 1, a current will flow into the breaking winding of the relay 7 from the inverse signal conditioner 8 and the contacts of this relay will again take the position corresponding to the switching off technological automation of power unit. At the same time, due to the use of a polarized relay with a trigger characteristic as a command body 7, the generation of false commands does not occur in the event of a power supply disconnection,

Under the conditions of maintaining the technological mode of operation of the energy-generating unit, the inputs of the decoder 5 are always connected to the code outputs of the register 2 corresponding to a lower rotational frequency value than the turn-off frequency corresponding to the code outputs of this register connected to the inputs of the decoder 4, which ensures the signal is turned off, the setpoint at any lower value of the rotation frequency than the frequency at which the setpoint is activated.

thirty

35

40

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FIG. Figure 2 shows a functional diagram of a relay in which the connection between the output; -1n register 2 and the inputs of the decoders 4 and 5 is made by means of a switch 9, which allows, if necessary, to change the rotational speed reference values. This expands the range of application of the relay to set the mode of operation of the power unit during the construction period, when the reservoir is filled and, consequently, the pressure change, since with its change the appropriate rebuilding of the set channels is required, ensuring normal operation of the power unit.

Thus, the application of two-input command organs with autonomous channels in the speed relay to turn the setting signal on and off, as well as connecting the decoder inputs to the register outputs by means of a switch, expands its application area.

Claims (2)

1. Revolutionary relay containing in series a pulse sensor and a register connected in series in each setting block 2479 The pulse shaper and the command body, whose input is connected to the pulse shaper output, and the second register input is connected to timer output 5, which is different in that, in order to expand the scope of the relay, it contains in each setting block two decoders and two shapers 10 pulses, and the command body is equipped. the additional input, the register outputs are connected via the first decoder to the input of the first pulse shaper, and through the second decoder to the input of the second pulse shaper, and the second pulse shaper is connected by an output to the auxiliary input of the command unit. 2. The relay according to claim 1, is different. 20. In order to expand the scope of the relay, it contains a switch, the inputs of which are connected to the outputs of the register, the first outputs to the inputs of the first .25 decoder, and the second outputs - with the inputs of the second decoder. V p m 1 g 1 PV V at V V V V V V V V V V w n / y If f / V v v Compiled by A. Laschev Re. N.Slobod nickname Techred N. Bonkalo Proofreader M, Peugeot Order 1952/48 Circulation 836 Subscription VNIIGSh of the USSR State Committee for inventions and discoveries 113035, Moscow, W-ZZ, Raushsk nab 4/5 Production and printing company, Uzhgorod, st. Project, 4 .