RO127442A2 - System for remotely monitoring the temperature of dismountable electric contacts for high intensity currents - Google Patents

Abstract

The invention relates to a system for remotely monitoring the temperature of dismountable electric contacts for high intensity currents within the structure of power supply distribution cells. According to the invention, the system comprises six temperature sensors () mounted in the connection areas between main line bars and input and output bars of a switch (), a sensor () for measuring the temperature and moisture of the environment, a slave module (), a master module (), a keyboard (), an alphanumeric display (), a relay () for acoustical signalling by means of a horn (), the system communicating locally and remotely with a processor () or a hierarchically superior computer () or a computer playing a monitoring role.

Description

Remote monitoring system of the temperature of the removable electrical contacts of intense currents.

The invention relates to a system of remote monitoring of the temperature of the removable electrical contacts of intense currents from the structure of the cells of electricity distribution.

The electrical equipment in the metal casing used for the distribution of electricity and current flow up to 2,500 A is not provided with temperature measurement systems in the removable contacts provided with tightening screws. Due to the reduction of the clamping force provided by the screws with which the inlet and outlet bars of the electrical appliance are removably coupled, either due to the wrong installation or due to the repetitive heating-cooling processes, the electrical resistance of the removable contact increases and the temperature is exceeded. permissible if the currents through the bars do not exceed the nominal values. This increase can lead to fires.

The system of remote monitoring of the temperature of the demountable electrical contacts of intense currents, according to the invention, removes this deficiency by installing sensors on each bar in the connection area at the entrance to the cell, in the connection area at the switch inlet and in the connection area. at the exit of the switch.

By applying the invention, the risk of fire is eliminated due to the increase in temperature in the removable electrical contacts.

The following is an example of applying the invention in connection with FIG. I and FIG. 2.

Fig. 1 Power diagram of the electric power distribution equipment fig.2. Block diagram of the Monitoring System

- fig. 3. The flow chart of the program related to the SLAVE module. Figure 4. The flow chart of the program related to the MASTER module.

The remote monitoring system for the temperature of the demountable electrical contacts of intense currents consists of six temperature sensors (1) mounted on the connection areas between the general distribution bars and the input or output bars of the switch (2), a sensor for measuring the temperature and humidity of the environment (3), a SLAVE module (4), a MASTER module (5), a keyboard (6), an alphanumeric display (7) and a relay (8) for acoustic signaling via a hoop ( 9). The system can communicate locally or remotely with the process (10) or with a computer (II) hierarchically superior or with a monitoring role.

The remote monitoring system of the temperature of the demountable electrical contacts of intense currents uses a specific program, written in C language, which consists of a chain of function calls:

Boost watchdog / temp. 0.1 s;

- Scanning temperature sensor no.l of the six temperature sensors (1)

- Scanning temperature sensor no.2 of the six temperature sensors (1)

- Temperature sensor scan no.3 of the six temperature sensors (I)

- Scan temperature sensor no.4 of the six temperature sensors (1)

- Scanning temperature sensor no.5 of the six temperature sensors (1)

- Scanning temperature sensor no.6 of the six temperature sensors (1)

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After the last function call - serial packet transmission - it returns to the first impulse watchdog / temp function call. 0.1 s.

The serial package includes the above data, and the information is transmitted serial to the MASTER module (5). In order to increase the security of the data transmission, it was decided to repeat the information in a complementary form in the second part of the serial package. This type of organization of information in the serial package allows a secure reception of the data, with fast and precise synchronization.

The program in the structure of the MASER module (5) consists of a sequence of function calls: loading EEPROM memory settings: own address, data bank address, minimum and maximum temperature thresholds, parity, transfer rate;

- Watchdog boost

Keyboard scan (6)

Menu treatment

Meter system treatment

Handling serial communication with the SLAVE module (4

Processing of serial communication MODBUS Control of alphanumeric display (7)

Control relay (8), if necessary

Claims (1)

Claim System for remote monitoring of the temperature of the demountable electrical contacts of intense currents, characterized in that it consists of six temperature sensors (1) mounted on the connection areas between the general distribution bars and the input or output bars of the switch (2) , a sensor for measuring the temperature and humidity of the environment (3), a SLAVE module (4), a MASTER module (5), a keyboard (6), an alphanumeric display (7) and a relay (8) for acoustic signaling by by means of a hinge (9). The system can communicate locally or remotely with the process (10) or with a computer (11) hierarchically superior or with a monitoring role