1. The Design and Implementation of Power Earth-Line
Monitoring System
The power earth-line monitoring system is a system that uses GSM communications
technology to collect record and display the physical parameters of earth lines when the power
lines are under construction and maintenance. The system is used to provide the help for
production management and on-site operator. The large construction of power lines often have
many measurement and control objects which are each separated by a certain distance but require
a unified management and scheduling. In particular widely distributed and adverse environment,
how to effectively collect and transmit data and then control and manage the whole procedure to
ensure construction safety has a very important significance.
Existing System:
Manual inspection of earth line is undergone in current system. Fault identification is
difficult and it requires more time for fault identification. Due to these disadvantages the
proposed system utilizes GSM based power earth line monitoring system.
Proposed System:
When the intelligent earth monitor detects that the single phase power lines and the single
phase earth-line are connected, it shows earth state. When the single phase power lines and
single phase earth-line are detected to be disconnected, it shows off state. Here, 89C51 transmits
state data to GSM data transmission module through the serial port, and then the GSM data
transmission module sends state data in the form of short messages by using GSM network. The
remote receiver receives state data via GSM data transmission module and then processes them
through MCU before they are sent into the monitor host in monitoring center via RS-232 port. In
the monitoring center, earth information is shown by the "Service monitoring program".

2. Block Diagram:
Detecting Circuit:
L
N E
Power Supply
LCD Display
Power Control
Circuit
ADC 0808
8051
Microcontroller
Max232
GSM Modem
Power Control
Circuit
Monitoring Section:

3. Power supply
GSM
Modem
Max232
Hardware requirements:

8051 Microcontroller.

ADC 0808.

Current Sensor.

LCD Display.

Max 232 circuit.

GSM Modem.

PC
Software requirements:

Embedded C

Keil Compiler.
 VB
Advantages:

Fault detection and location is identified quickly.

Simple and easier technique to find earth fault.
PC

4. 
Low cost technique.