OPGW - Optical Protection Ground Wire
The fact that cables can carry both electrical power and optical transmissions means that the full capabilities of new or existing low and medium tension network structures can be fully utilised.
Since the telecommunication market has been opened up to new telephone operators, data transmission and video service providers, there has arisen the possibility of installing OPGW cable in a wide variety of areas.
OPGW cables have been designed to meet the specific characteristics of the overhead lines on which they are installed. For example, the short circuit current is verified, which is essential for the calculation of the temperature rise in each circumstance and the required cooling time. Notes on the design of OPGW conductors are listed on the following pages.
The OPGW conductor is usually composed of a central non metallic tubular structure containing optical fibres, which is situated inside the steel or electro-welded tube. The tube is surrounded by one or more layers of steel or aluminium, aluminium alloy and steel alloy wires. The specific type, size and number of these wires is selected to suit each individual application.
In some cases, it is possible to use a non metallic optical fibre cable that is helically wound either on the protection conductor or on the phase conductor. Some examples are shown in the following pages.
OPTICAL PROTECTION GROUND WIRE
- Operating voltage of the power line
- Maximum short circuit current
- Short circuit time
- Supporting structure type
- OPGW installation system
- Pole span and conductor hang
- Range of temperature for storage, installationand operation
- Ground profile
- General weather condition
- Light frequency
- Maximum wind speed
- Maximum ice load
OPGW. What to take into consideration for the project!
Our customers include all the main worlwide Telecomunication group and engeneering companies.