10-10-2017, 04:11 PM
Providing protection to the distribution transformer can be achieved by turning off the entire unit with the help of Radio Frequency Communication. In addition, the system displays the same on a PC in the main station which is in a remote location. In addition, it is able to recognize faults caused by overload, high temperature and overvoltage. The design generally consists of two units, one in the substation unit, called as a transmitter and display unit, and one in the main station called as a control unit. The transmitter and display units in the substation are where the voltage, current and temperature are continuously monitored by the AVR microcontroller and displayed through the display unit. An RF transmitter is used to transmit the signals that are obtained. The control unit at the main station by means of a PC and an RF receiver receives the RF signals which are transmitted by the transmitting unit and react according to the received signal.
This system is to find out if the voltage level that is available in the secondary station is the same as that of the loads that is connected to the secondary station. The system consists of potential transformer, precision rectifier, A / D converter, microcontroller, LPT (line printer terminal), PC and a data cable. The voltage level of each load is measured using a potential transformer. The potential transformer drops the voltage level to 6 volts which is an AC signal. The AC signal from the transformer circuit is then given to a precision grinding unit.
There will be no voltage drop due to the diode in the rectifier circuit. The output of the grinding unit is a pulsed dc output. The output signal is given to an A / D converter, where the analog signal is converted to a digital signal. The digital input is given to a microcontroller unit. The signal from the microcontroller unit is transferred to the PC via the data cable. The voltage of the substation is also measured using a potential transformer. The potential transformer lowers the voltage level to 6 volts, which is an AC signal.
The AC signal from the transformer circuit is then given to a precision grinding unit. There will be no voltage drop due to the diode in the rectifier circuit. The output of the grinding unit is a pulsed dc output. The output signal is given to an A / D converter, where the analog signal is converted to a digital signal. The signal is transmitted to the PC via the LPT interface.
This system is to find out if the voltage level that is available in the secondary station is the same as that of the loads that is connected to the secondary station. The system consists of potential transformer, precision rectifier, A / D converter, microcontroller, LPT (line printer terminal), PC and a data cable. The voltage level of each load is measured using a potential transformer. The potential transformer drops the voltage level to 6 volts which is an AC signal. The AC signal from the transformer circuit is then given to a precision grinding unit.
There will be no voltage drop due to the diode in the rectifier circuit. The output of the grinding unit is a pulsed dc output. The output signal is given to an A / D converter, where the analog signal is converted to a digital signal. The digital input is given to a microcontroller unit. The signal from the microcontroller unit is transferred to the PC via the data cable. The voltage of the substation is also measured using a potential transformer. The potential transformer lowers the voltage level to 6 volts, which is an AC signal.
The AC signal from the transformer circuit is then given to a precision grinding unit. There will be no voltage drop due to the diode in the rectifier circuit. The output of the grinding unit is a pulsed dc output. The output signal is given to an A / D converter, where the analog signal is converted to a digital signal. The signal is transmitted to the PC via the LPT interface.