CZ26693U1 - Device for monitoring fail states - Google Patents

Description

Equipment for monitoring fault conditions

Technical field

The invention relates to a device for monitoring fault conditions on high or low voltage lines or terminals, comprising a measuring block connected to a fault detection block connected to a power supply.

BACKGROUND OF THE INVENTION

Electronic devices with digital data processing are used for monitoring fault conditions on high or low voltage lines or outlets, which monitor the occurrence of faults on high or low voltage lines or outlets based on monitored parameters, either only by voltage or current measurements, or based on the magnitude and timing of the voltage, magnitude and timing of the current, frequency, and phase conditions in the measured system.

Based on the detected fault, the device then signals the fault to the superior system or locally. Such a block for merely detecting a fault condition is referred to as a fault indicator.

If the fault detection block is additionally provided with a control block, then the device not only signals the fault but also gives a signal to open the respective line or disconnect the respective terminal. Such a combination of a fault detection block with a control block is in practice referred to as digital protection.

The disturbance indicators and digital protections described above are now widely used equipment, whose importance is gradually increasing, for example in connection with the diffuse production of electricity from renewable sources. There are a number of manufacturers of these devices and the range offered covers a wide range of user needs.

From a constructional point of view, the concept is such that a digital protection or fault indicator for a single power line or outlet is always supplied as a separate device with its own power supply, communication processor and chassis.

The above concept whereby a digital protection or fault indicator for a single power line or outlet is always delivered as a separate device with its own power supply, communication processor and chassis means that when there are multiple outlets or lines in a single power object In order to protect or indicate faults, several separate electronic devices must be used, with power supplies, communication processors, and chassis installed multiple times in the assembly, which is reflected in high purchase costs.

The essence of the technical solution

The aforementioned drawbacks are eliminated by a device for monitoring fault conditions on high or low voltage lines or outlets, comprising a measuring block connected to a fault detection block connected to a power supply according to a technical solution which consists in that one power supply at least two fault condition detection blocks are connected via a common communication and power bus.

The advantage of the equipment according to the technical solution is a significant reduction of costs in the implementation of control systems of energy objects with multiple outlets or lines, both in terms of the purchase price of the electronic equipment itself, but also in terms of installation costs, saving space in the switchboard cabling for interconnection and reduced installation effort.

According to a preferred embodiment, a communication module is connected to the communication and power bus.

- 1 CZ 26693 Ul

The fault detection block may be a fault indicator.

If it is desired that the fault be not only signaled but also that the line is disconnected or that the terminal is disconnected, then the fault detection block further comprises a control block.

The fault detection block with the control block forms a digital protection.

To extend the possibilities of unit integration to real technology, it is advantageous if a block of digital and / or analog inputs and / or outputs is connected to the communication and power bus.

According to a preferred embodiment, all components are arranged on a common chassis.

BRIEF DESCRIPTION OF THE DRAWINGS

An exemplary embodiment of a device for monitoring fault conditions on high or low voltage lines or outlets according to the invention is shown in block in FIG. 1.

Examples

The exemplary embodiment of the fault condition monitoring device of the high or low voltage lines of FIG. 1 includes both separate fault condition detection blocks I and fault condition detection blocks 1, which are extended with control blocks 6.

The fault detection block 1 merely signals a fault in the respective high or low voltage line, and is therefore referred to in practice as a fault indicator.

The fault detection block I, which is provided with the control block 6, not only signals the fault, but also provides a signal for opening or disconnecting the respective line. Such a combination of the fault detection block I with the control block 6 is in practice referred to as digital protection.

A measuring block 7 is connected to each of the monitored high or low voltage lines or terminals, which measures either voltage or current only, or can monitor other parameters, such as voltage waveform, current waveform, frequency and phase conditions in the measured system.

All the fault detection and fault detection blocks with the control block 6 are connected via a communication and power bus 4 to a common power supply 2 and to a common communication module 3.

Furthermore, a block 5 of digital and / or analog inputs and / or outputs is connected to the common communication and power bus 4 to extend the possibilities of connecting the whole to real technology.

The device for monitoring fault conditions on high or low voltage lines or outlets can, in technical terms, be designed as a compact product with a fixed configuration already during its production, or it can be implemented as a modular system into which individual blocks are optionally fitted by the user. Fault detection blocks I and control blocks 6 are located in one common chassis and share a common communication and power bus 4. A common power supply 2 and a common communication module 3 are connected to this bus 4, which are shared by all sides for fault detection. and control blocks 6.

The device for monitoring fault conditions in high or low voltage lines or outlets works by continuously measuring either voltage or current on a given line or outlet on a given line or outlet, or monitoring other parameters, such as voltage waveform, current waveform, frequency and phase conditions in the measured system. The measured values are transmitted to the fault detection block 1, which signals the fault to the master system or locally, and if equipped with the control block 6, on the basis of the detected fault, commands the disconnection of the line or disconnection of the outlet.

Claims (7)

PROTECTION REQUIREMENTS A device for monitoring fault conditions on high or low voltage lines or outlets, comprising a measuring block (7) connected to a fault detection block (1) connected to a power supply (2), characterized in that: one power supply 5 (2), at least two fault detection blocks (1) are connected via a common communication and power bus (4). Device according to claim 1, characterized in that a communication module (3) is connected to the communication and power bus (4). The apparatus of claim 1 or 2, wherein the fault condition detection block (1) further comprises a control block (6). Device according to any one of the preceding claims, characterized in that the fault detection block (1) is a fault indicator. Device according to any one of the preceding claims, characterized in that the fault detection block (1) with the control block (1) is used. 6) create digital protection. Device according to any one of the preceding claims, characterized in that a block (5) of digital and / or analog inputs and / or outputs is connected to the communication and power bus (4). Device according to any one of the preceding claims, characterized in that all components are arranged on a common chassis.