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DWDM Solutions for Utility Networks Teleprotection

Teleprotection is mission critical component for a utility company for providing a reliable, robust and safe electric network. PacketLight’s WDM solutions are the most unique 1U platforms for transporting multiple teleprotection interface as well as Ethernet, SONET/SDH and video signals over low latency fiber optic communication network.

Utility companies are demanded to provide secure and uninterrupted supply of electricity in order to power our daily existence.  However, operating a power grid requires a complex set of tools that include comprehensive protective and control measures that ensure its reliability and safety not only for human life but also of equipment.  Utility companies have been using protection relays together with communication links to provide the best possible protection, also referred to as teleprotection.

Teleprotection uses a complex set of relays and high speed communication equipment to identify power faults on HV lines, transformers, reactors and other electrical equipment and isolates and shuts down faulty areas selectively, thus protecting the whole power plant from damage.

Teleprotection is mission critical component for a utility company for providing a reliable, robust and safe electric network. Therefore, there are several critical demands placed on teleprotection infrastructure: hardware and link redundancy, low latency in communication network, and constant monitoring and self-test capabilities.

These demands can be met with deploying WDM (Wavelength Division Multiplexing) backbone communications infrastructure over existing or new fiber optic lines. PacketLight’s DWDM solutions are an ideal fit for teleprotection in utility companies.

Hardware and link redundancy:

PacketLight’s WDM solutions are the most unique 1U platforms for transporting multiple teleprotection interfaces as well as Ethernet,  SONET/SDH and video signals over the same low latency fiber optic communication network. All inclusive compact units provide carrier grade resiliency and redundancy which include dual power supplies for both DC and AC power sources, 1+1 fiber line protection with less than 50ms switch-over time, facility+ line protection, and full hardware protection providing no single point of failure in the teleprotection network.

PacketLight solution can free a lot of fiber resources by multiplexing of several teleprotection interface, carrier ethernet and SONET/SDH over the same fiber ensuring clear signal path for relay communication.

Another highly important factor in teleprotection is high quality of service, low delay/latency, and low delay variation between the relays. PacketLight’s products provide lowest possible latency transparent communication possible ensuring fast fault isolation.



PacketLight’s high Quality of Service and monitoring capabilities designed for carrier networks are ideal for teleprotection applications in utility companies.

PacketLight’s NMS/EMS management software allows for line and equipment testing remotely in order to isolate problems in case of equipment failure. In addition, multiple alarms and dry contacts can be tripped in a variety of emergency situations including power down or high water levels.

PacketLight’s equipment is simple to install and operate. The units are custom assembled before shipment for unique customer configuration while keeping the CAPEX low. Hot-swappable power supplies and line ports are easy to replace and maintain keeping the OPEX down.

Teleprotection is an important part of any utility network. It provides mission critical tools to identify, isolate and contain power faults while allowing greater transmit power to existing lines and reducing transmission line damage. Thus, teleprotection requires highly reliable, full safe communication infrastructure with lowest possible delay.

PacketLight’s WDM solutions built for carrier networks are highly reliable, low latency, and compact and provide the necessary redundancy, scalability, and manageability required by the utility companies while maintaining low CAPEX and OPEX.

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