SU1396075A1 - Apparatus for registering the loads of network components - Google Patents

Abstract

The invention relates to electrical measuring equipment and serves to expand the functionality of the device. The device contains a current measuring transducer 1, a rectifier 2, a smoothing filter 3 and a load 13 of the electrical network 12. The introduction of voltage dividers 4-6, network load level indicators 7-9, and relays 10 and 11 with switching contacts automatically register the whole g network load levels, including its overload. This, in turn, makes it possible to make a decision on the change in network load. In addition, the sampling of the output signals of the device makes it possible to automate the process of network load control with the help of the ACS. 1 il. (ABOUT

Description

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The invention relates to electrical measuring technique and can be used to register the load of elements of an electrical network with a fixation exceeding the calculated maximum load.

The purpose of the invention is to expand the functionality by increasing the number of recording network load levels.

The drawing shows a block diagram of the device.

: The device contains a measuring current converter 1, a rectifier; 2 connected to the output of the measuring current converter 1, a smoothing filter 3 connected to the output of the rectifier 2. To the output of the smoothing filter 3, dividers S4-6 are connected eg besides, the output 4, one by one, and one with indicators of 7–9 levels of network load, the other inputs of which are connected to the corresponding output terminals of the device. The device also contains relays 10 and 11 1C with switching contacts, with the relays 10 and 11 connected to the outputs of the voltage dividers 5 and 6, respectively. The opening contact of the relay 10 is connected to the second entrance hall. The indicator of the network load level 7 and the short circuit of the relay contacts 10 and 11 are connected respectively to the second inputs and terminals of the indicators 8 and 9 Levels, the network load. The common output of the switching contact of the relay 10 is connected to the opening contact of the relay 11, the common output of the switching contact of which is connected to a common bus connected to one of the output terminals of the smoothing filter 3.

Measuring transducer 1

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0 indicator of indicator 8

The voltage proportional to the current in the phase of the electrical network 12, from the output of the measuring transducer 1 current enters the input of the rectifier 2, is rectified by it and then smoothed by the filter -3, and then goes to the voltage dividers 4-6. the stable level of voltage applied to the indicators 7–9 of the network load levels, and the dividers 5 and 6 determine the response voltage of the relays 10 and 11, corresponding to the determined network load levels. When the network load level is low, the voltages at the outputs of dividers 5 and 6 are insufficient for the operation of relays 10 and 11 and they are in the initial state shown in the drawing. In this case, the circuit of the network load level indicator 7 is closed through the contacts of the relay 10 and 11 and the first (upper in the drawing) output terminal of the device has zero potential (as 5 as connected to the common bus), which

if the remaining output terminals of the device are not connected directly to the common bus, it corresponds to a low network load. If the network load is low, LED 7 is on,

With an increase in voltage at the output of the filter 3, which corresponds to an increase in the current in the controlled network 12, that is. the network load level, the relay 10 is triggered, switching its switching contact to the bottom position in the drawing, opening the indicator circuit 7 and the circuit in- the circuit. 5 starts to burn and the second output terminal acquires a second output terminal high level

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current can be made in the form of transdg network load. When the maximum network load level is exceeded, the last relay is triggered, i.e. relay 11, while indicator 9 lights up and a sound signal is generated, generated by an audio indicator connected in parallel with LED 9. At the same time, the output potential of the device acquires a zero potential connected through the switching contact of relay 11 to the common bus. The signals taken from the output terminals of the device are intended for use in an automated control system (ACS). When following an overload

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reactor, as the smoothing filter 3 aperiodic link. of the first order can be used, and diodes are used as indicators. In addition to Toroj in indicator 9, which records the maximum network load level, an audible indicator can be turned on in parallel with the LED. The input terminals of the measuring current transducer 1 are included in the phase circuit of the electrical network 12 having a load 13.

The device works as follows.

network load. When maxi is exceeded

the last level of network load, the last relay operates, i.e. relay 11, while indicator 9 lights up and a sound signal is generated, generated by an audio indicator connected in parallel with LED 9. At the same time, the output potential of the device acquires a zero potential connected through the switching contact of relay 11 to the common bus. The signals taken from the output terminals of the device are intended for use in an automated control system (ACS). When following an overload

network disconnection of the load 13 of the relay 11 returns to its original state, thereby turning off the light and sound signals of network overload. If the load on the network is not sufficient to return the relay 11, the latter can be returned to its initial state by opening the output circuit of the filter 3 using the button shown in the drawing. The proposed device can be implemented according to the above scheme and with a large number of registered intermediate levels of network load.

Thus, the proposed device, in comparison with the prototype, has greater functionality, since it allows to automatically register a whole range of network load levels, including its load, which allows making timely decisions about changes in the network load. In addition, the sampling of the output signals of the device makes it possible to automate the process of network load control with the help of the ACS.

Claims (1)

Invention Formula A device for registering the load of network elements, containing a measuring current transducer whose input is connected to the phase of the monitored network, a rectifier whose input is connected to the output of the measuring transducer, a transducer, and read A filter, whose input is connected to the output of the rectifier, is designed so that, in order to expand its functionality by increasing the number of registered load levels of the monitored network, voltage dividers connected to the output of the smoothing filter are added, network load level indicators, the first input terminals of which are connected to the output of the first voltage divider, and their second input terminals are connected to the corresponding output terminals of the device, and the relay with switching contacts The windings of which section n-o are connected to the output of the second and subsequent voltage dividers, and the output contact of the first relay, the winding of which is connected to the output of the second voltage divider, is connected to the second output terminal of the first network load level indicator, the conclusions make contacts of the first and subsequent relays are connected to the second inputs of the second and subsequent indicators of the network load level, respectively; the common output of the switching contact of each previous relay is connected to the output time) Ln ca oschego subsequent relay contact, and the same general conclusion last relay switching contact is connected to one of terminals vyhodngh smoothing filter connected to the common schinoy.