Here are excerpts from the article….
The basic facts are that the TWACS system
• creates powerful dirty electricity
• the dirty electricity is a constant presence, possibly 24/7
• the dirty electricity turns all wires throughout the house into antennas
• keeping an analog meter will not help much
• the signals cannot be blocked or filtered
• scientific studies link dirty electricity with various health effects
• some people are sensitive to dirty electricity
• TWACS lacks basic security features
This article covers all these issues in detail.
Keywords: TWACS, DCSI, power line communication, power line carrier, PLC,
dirty electricity, health, smart meter, security
The TWACS system
TWACS stands for Two-Way Automatic Communication System. It allows the
utility company to communicate with smart meters placed on buildings throughout
their service area. Some TWACS equipment is marketed under the DCSI name.
The communication system is two-way, which means the utility can both send
instructions to the meter and receive data coming back.
The system can be used to read the electrical usage for a building, instead of
sending out a meter reader once a month. The information is typically transmitted
a few times a day, but could be only once a month. The transmission may contain
2 TWACS low frequency power line communication system
information on how much power is used each hour of the day, or even every 15
Any type of system that communicates by transmitting signals via power lines is
called a Power Line Carrier or Power Line Communication (PLC) system.
TWACS meters may also be wireless
Some TWACS meters also have built-in wireless transmitters. These are mostly
used to get meter readings from gas and water meters on the house. The electrical
meter then passes that information on, using the TWACS system. The Aclara
Badger ORION product is such a system.
On more advanced systems, the TWACS meter may use wireless to transmit
signals to a display screen or “smart” appliances inside the house.
The line pulses
A TWACS meter sends out a brief pulse about 60 times a second when it
transmits. This pulse travels along the power line to the substation, where it is
received. The voltage fluctuations from the pulse may also go in other directions
on the local grid, including into other houses in the area, even houses several miles
The utility equipment at the substation also transmits by sending pulses on the
grid, which it uses to send instructions to the smart meters. These pulses travel on
all the local power lines and into all houses. The system would not work if the
pulses did not travel to all houses. The pulse does not “know” which meter it is
going to, just as the signal from a radio station does not know in advance where
the radio receivers are.
The TWACS pulses need to travel for many miles, sometimes dozens of miles. At
the other end, the pulse signals must be clearly detectable above the regular line
noise, so the pulses must be fairly powerful. The strength of the TWACS
transmitters are not disclosed by the vendor, however.
READ full article at: http://www.eiwellspring.org/smartmeter/TWACS.pdf