SU635464A1 - Device for monitoring process protection system - Google Patents

Description

Of the 10T), the focus is on the field of diagnostic instrumentation, for example, the automatic control of a system of technological thinning of energy blocks.

A device for monitoring is known, which contains sensors connected via: 1 meters and control units to the display and alarm indication units 1.

The closest technical solution to the invention is a device for monitoring a process protection system, comprising a recorder, a protection control relay and sensors connected via meters to an intermediate relay connected to signaling devices and output relays connected through a switch to a power supply stone 2.

The disadvantage of such devices is low reliability and low speed.

In addition, when testing their switching protection, the device {2 has individual buttons that must be pressed alternately during testing, and sensors and meters are not covered at all, which does not provide sufficient reliability.

The purpose of the invention is to increase the speed and reliability of the device.

This is achieved by the fact that a disturbance signal generator, a pulse generator, and a switch j are inserted into the device-Bo; a command block connected to a switch, alarms, a protection protection relay, a switch, an impulse generator and a recorder connected to the protection control relay and a switch connected to the pulse generator and the driver of the blown signals connected to the respective sensors and meters. The perturbed signal conditioner is made in the form of sequentially connecting 5 commutating elements, a resistor and a closing contact.

The drawing shows a block diagram of the device.

Opa contains sensors /, meters 2, consisting of measuring circuit 3 g, amplifier 4, intermediate relays 5, signal, gyzators 6, buttons 7 for returning signal 1; mash, output relay 8, power source 9, switch W, buttons // testing, removal button 12 has been tested, relay J3 is low: tgchg; protection g, power supply 14, generator 15

5 pulses, the switch J6, the command block / 7, the recorder 18, the shaper J9 spgna.lov disturbances, containing a closing contact 20, a resistor 2 / and the switching element 22.

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The device works as follows.

When voltage is applied to the device, the / 7 unit acts on the switch 10, which disconnects source 9 from the output relays 8 and connects source 14 to loop 13. After that, switch 16 is turned on, which by the switching element 22 closes the circuit of the first driver 19 of the disturbance signal. The last closing contact 20 and the resistor 21 generate a disturbance signal arriving at the measuring circuit 3, sufficient in duration and amplitude to deflect meter 2 of the first sensor /, which triggers the operation of the relay 5 n of the signaling device 6. This triggers the relay 13.

After the duration of the disturbance signal has expired, the meter 2, when the channel of the tested protection is in good condition, under the influence of the working signal of the sensor /, returns to the nervous state. In this case, the relay 5, the relay 13, and the detector 17 through the block 17 return to the initial position. But if the fault in the protection channel fails, the meter 2 does not return to the initial state the relay 5, the relay 13 and the detector 6. The recorder 17 18 analyzes the result of monitoring the health of the channel and the tested protection according to the state of the relay 13 and the position of the switch 16.

The control of subsequent channels of the technecom-tech system is carried out similarly to unit 17 via generator 15 and switch 16.

In the case of the need for individual verification of individual elements of any vsial system protects the cells 11, 12 and 7, as well as the switch 10.

The application of the proposed device will significantly reduce the iridom of operability testing, exclude direct participation in inspections of operational personnel protection, document the inspection results on paper, as well as increase the number of technological protection elements covered by the operability test.

Claims (2)

1. A device for monitoring a process protection system, comprising a recorder, a protection monitoring relay and sensors connected via meters to an intermediate relay connected to the alarm devices and output relays connected via a switch to the power sources, so that To improve the speed and reliability of the device, it contains a disturbance signal generator, a pulse generator, a switch and a command block connected to the switch, alarms, a protection control relay, a switch, a generator } recorder pulses and connected to the protection relay and the control switch associated with the generator and imiulsov disturbance signal generator connected to the appropriate sensors n th meter. 2. The device according to claim 1, that is, in that the perturbation driver is designed as a series-connected switching element, a resistor, and a closing contact. Information sources taken into account by the expertise: 1. Technical means of automated control systems. M., “Energy. 1974, p. 109-114. 2. Development and research of modernized standard complete devices technological protections. The modern schemes of upgraded units and systems for testing technological protection. Book II, model number 7888-K, M., OPTP TP, 1975.