Cepco Products patented technology allows reliable operation in Industrial as well as Residential Applications.

The Cepco Products Powerline Carrier Signal can be extended to every point served by the 120V AC Power within a building or facility. In large buildings or facilities where multiple Power Transformers may be used, the signals can be coupled from one Transformer to another, by using the Model CPR-1, Transformer Coupler/Repeater .

The details of extending and optimizing the range to cover essentially any facility will depend on whether your system is in a Residence (single-phase power system), or a Commercial or Industrial facility (3-phase power system).

The reason for this is that all Cepco Products transmitters place their signals at the zero crossing of the voltage wave, and all Cepco Products receivers (and monitoring panels) look for the signals at that point, and will reject any signals that do not occur at the zero crossing as noise. This is one of the many features that contribute to the reliability of the Cepco Products Powerline Carrier system. See Whitepaper,  Reliability    

Note that in the diagram below of the single-phase system voltage waves, the zero crossings of the two waves (phase 1 and phase 2) correspond exactly. So that if the transmitter is on one phase (say phase 1), and the receiver is on the other (phase 2), the transmitters signal will occur just where the receiver looks for it, at the zero crossing.

However, as we see in the voltage wave diagram for the 3-phase system, this is not the case. The zero crossings of the three phases (phase A, phase B, and phase C) all occur at different times. Therefore, if the transmitter is on one phase (say phase A), and the receiver on another (phase B or C), the receiver will reject the transmitters signal as noise.

If you have a 3-phase system, and you cannot put both the transmitters and receivers on the same phase, you must install a Model CPR-3, 3-Phase Coupler/Repeater . This formats the transmitters signals so that they occur at the zero crossings on all three phases.

You know you have a Single-Phase Power Distribution System (sometimes referred to as a Split-Phase System) when the high voltage is exactly double the low voltage (120V/240V) or (110V/220V).

If you only have one or two Transmitters and Receivers, Its a good idea to try them first to see if they work before installing the Capacitor. If not, install the Capacitor as shown. This will usually solve any problems. However, the addition of the Booster Modules will insure the signal availability at every point served by utility company transformer.

One thing that might get a bit confusing is the different voltages you will hear. One person might talk about 110V, another 117V, or still another will use 120V, as we do here. These are all, in fact, exactly the same thing. All are within the utility company tolerance limits.

In residential areas power is distributed to houses via three wires, two hot and one neutral. Each Power Transformer supplies 8 to 10 houses with a nominal 120V from each hot line to neutral, and 240V from one hot line to the other hot line, 120V/240V. Actually, this voltage will vary to as low as 110V/220V in some areas. Note that in all cases the higher voltage is exactly double the lower voltage. This is called a Single-Phase or Split-Phase Power Distribution System.

When a CEPCO Transmitter is installed in one house in a residential area, the signal is available at every outlet in that house, and at every outlet in every other house that shares the same Power Transformer (8 to 10 houses). To avoid interfering with your neighbor, the systems are set to different codes (DIP Switch Setting). On the other hand, If you desire that a neighbor receive your signals and vice versa, make sure the code settings match.

To insure that the signal is strong enough at every point, you may need to add a capacitor ( 0.1 mfd to 0.5 mfd, 400V or more) across the 240V. This is best done at the Distribution Panel (where the circuit breakers are located). This is shown is the diagram below.

Apartments, Condos, Motels and other Multiple Unit Dwellings

Apartments, Condos, smaller Motels, etc., will most likely have a single phase power distribution system (120V/240V, two Hot wires and a Neutral), however larger building or facilities may have a 3-phase system. (120V/208V, three Hot wires and a Neutral). You should check this before starting your installation.

If you do have a single phase system, you should install the Capacitor, 0.1 mfd to 0.5 mfd, 400V or more, across the 240V (Hot wire to Hot wire). This only needs to be done at a distribution panel in one apartment or living unit

In addition, a Signal Booster Module , may need to be added across each phase (Hot wire to neutral, two Signal Boosters total). The Booster Modules can be added at either the distribution panel, (hardwire version Model TR-BST(HAW) ), or they can be plugged into the 120V outlets (plug-in version, Model TR-BST(PN)). Refer to the diagram below.

You know it is a 3-Phase System if it has three (3) Hot wires and a Neutral, and the voltage between any two Hot wires is about 208V and the voltage from any Hot wire to Neutral is 120V (120V/208V).

In this case you must have both the Transmitter(s) and Receiver(s) on the same Phase. In cases where there are only a few Transmitters and Receivers, You can switch wires in the Distribution Panel to accomplish this.

Or, if want to have the signals available at every point within your facility, you need to install a 3-Phase Coupler/Repeater, & Model CPR-3.

The CEPCO signals are isolated to the individual power transformers. For this reason, in large facilities where there are more than one power transformer, you will need to use a Transformer Coupler/Repeater, Model CPR-1, to connect secondary of each transformer.

Commercial, Industrial, and Institutional Buildings and Facilities almost always have a 3-Phase Power Distribution System.

In this case, you need to have the Transmitters and Receivers on the same Phase, or you will need to install a Cepco Products Model CPR-3, 3-Phase Coupler-Repeater , in order to insure the presence of the correct signal at every outlet.

Only one Model CPR-3 is required (for each transformer), and it can be installed at any low voltage distribution panel where all three phases and Neutral are available. Complete installation instructions are included with the Model CPR-3. The CPR-3 restores the signal to its maximum amplitude (Signal Booster).

The following is a recommended step-by step procedure for system installation in Commercial and Industrial Facilities

Step 1. Determine if the building of facility is served by a single transformer or multiple Transformers (you need not consider back-up Transformers that are only used in emergencies). If the building or facility is served by a single transformer, then proceed with Step 2. If more than one transformer will be involved, go to Step 5.

Step 2. Locate all of the low voltage (120V) distribution panels that will be involved in your installation (all panels that will supply power to a where a CEPCO Transmitter, Receiver, or Monitor Panel will be connected).

Step 3. At one of the distribution panels (from Step 2) install a Model CPR-3, 3-Phase Coupler/Repeaters shown in the diagram below.

Step 4. At all other distribution panels located in Step 2, install a Model TR-BST(HW) on each of the three phases for each of the remaining distribution panels as shown below. Note that the Model TR-BST(HW)'s are not need at the distribution where the Model CPR-3, 3-Phase Coupler/Repeater is installed.

Step 5. If the building or facility is served by more than one transformer (excluding emergency transformers), repeat Steps 2, 3, and 4 above for each transformer separately.

Step 6. Install a Model CPR-1, Transformer Coupler-Repeater to connect the secondary (low voltage side) of each transformer with the secondary of the other transformer. Since the Model CPR-1 restores the signal to its maximum amplitude, multiple Power Transformers may be coupled together in this manner. Complete installation instruction is supplied with the Model CPR-1.

The schematic diagram of a typical installation in a building with three (3) transformers, T1, T2, and T3, is shown below. As an example, we will walk through the installation procedure.

First, we locate each low voltage distribution panel that will be involved in our installation (each panel that supplies power to where a CEPCO transmitter, receiver, or monitor panel will be installed). We note which transformer (T1, T2, or T3) is feeding each distribution panel.

Then we install a Model CPR-3, 3-Phase Coupler/Receiver , at one distribution panel for each T1, T2, and T3 (a total of 3 Model CPR-3's), and install Model TR-BST, Signal Booster Module , at each of the remaining panels (3 per panel) for T1, T2, and T3.

Next we install a Model CPR-1, Transformer Coupler/Repeater to connect the low voltage phase of T1 to a low voltage phase of T2, and another Model CPR-1 to connect a low voltage phase of T2 to a low voltage phase of T3. A total of two (2) Model CPR-1's are required in this case. In connecting the Model CPR-1 between two transformers, the phase connection from one transformer must be different from that of the other transformer. Example: If the connection is to phase A of one transformer, then the connection to the other transformer must be phase B or phase C. Each Model CPR-1 should grounded as shown.

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Monitor Panels
Three diferent types Monitor Panel are available, and in several sizes. You may use as many Monitors in as many locations as you like.
Model RX-MTS
Model RX-MTW
Model RX-ADP

Panic Buttons
Panic Alarm or Emergency Response System for Doctors and staff in Mental Hospitals, Psychiatric outpatient's facilities, government workers that interview the public, or anyone who may encounter a hostile individual.
Model RX-PBT , Pushbutton Transmitter, plugs directly into a power outlet, may be mounted on top of a desk, or concealed beneath the desk where it cannot be seen. DIP switch code setting provides the location for response.

Add a radio link to Panic Alarm or Emergency Response System to provide Teachers with freedom of movement within a classroom, or for Doctors and staff within a Mental Hospitals Psychiatric ward. The Model RX-PS1
is used with a radio receiver (Linear D-67) and a Pendant Transmitter (Linear ET-1B) two provide freedom of movement within the classroom or ward, while allowing location annunciation by the DIP switch setting of the Model TX-PS1.

Antitheft
The Thiefbug, Model TX-BUG1 is used to prevent the theft of electronic items.

Safety and Security
Monitor Door and Window Switches, PIR Detectors, CO Detectors, Smoke Detectors, etc. Use the Model TX-BUG2
for wired-in connections and the Model TX-BUG3
for plug-in connections

Single Channel Receivers
Turn ON lights, sound Sirens or Horn with a Model RX-RCM
that you wire into an outlet box. Match the DIP switch code with the Transmitter. Plug in Model RX-CCO
to connect your system to an Alarm Panel or to trigger an Automatic Dialer. Plug in Model RX-RAM
to sound a Horn or Siren. Plug in Model RX-BZM
for audible notification.

Signal Boosters
The Signal Booster Module, Model TR-BST
is for use in installations where the combination of high current loads and long distances may reduce the signals to below acceptable levels. Model TR-BST(HW) is the wire-in unit, and the Model TR-BST(PN) plugs into an outlet.

Transformer Coupler
The Transformer Coupler-Repeater, Model CPR-1
is required in installations where you wish to couple the signals in a system that have more than one power transformer.

CEPCO Products 9540 Owensmouth Ave Chatsworth, CA 91311, USA
Telephone (818) 998-8569 Fax (818) 998-8560

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