Protection Relays by Application

Overcurrent protection can be used for primary protection, or as a backup for phase overcurrent or earth fault protection. Instantaneous, definite time, IDMT, directional or non-directional are types of overcurrent characteristics often used in protection from basic to advanced feeder applications. Available in a range from basic devices, to complex numerical devices with IEC 61850 communication and cybersecurity.

Arc flash protection detects electrical arcs in MV and LV equipment and quickly isolates power to limit arc energy and minimize risks. The ultra-fast leading Vamp arc protection solutions are available in a flexible range, from stand-alone devices through to complex schemes or embedded protection relays, all with the latest connectivity, including IEC 61850, PRP, redundant Ethernet communications and cybersecurity features.

Our Motor Protection relays are designed for motor applications where efficiency and reliability are essential. From simple or basic protection to advanced Motor Protection applications, they use dedicated functions and communication like IEC 61850 that enable you to manage motors more effectively and save time.

As transformers are high-cost, essential assets in power systems, protection schemes should be designed to detect and clear any abnormal conditions quickly. In our advanced transformer protection and control devices, we use leading techniques such as multiple winding differential, REF and thermal algorithms, and gather service data to help schedule preventive maintenance.

Capacitor banks provide essential functionality to help maintain the quality, or power factor of virtually any electrical distribution system. Due to the varied nature, our protection devices are a perfect fit, offering flexibility to adapt to any MV application. With the latest connectivity including IEC 61850, PRP, redundant Ethernet communications and cybersecurity features.

Whether for small, medium or large generators, find devices with dedicated functionality to provide reliable protection of generators and rotating machines. A flexible and scalable range of devices for any generation application; with the latest connectivity including IEC 61850, PRP, redundant Ethernet communications and cybersecurity features.

Line differential protection is designed for high performance protection on overhead lines and cables in 2 or 3 ended schemes. They can be used over long distances together with the latest high speed communication or GPS time synchronism to achieve very fast tripping times for strategic parts of your network. High performance products also offer the latest features including cyber security and redundant Ethernet communications.

When searching for reliable distance protection for cables and lines, look no further. Our advanced distance protection relays offer field-proven experience with sophisticated algorithms and protection characteristics such as quadrilateral, polygon or mho which are well known for their high performance in complex applications. With subcycle operation, they offer the latest connectivity with IEC 61850, PRP, redundant Ethernet communications and cybersecurity features.

Solutions for busbar differential protection need to be flexible and high performance to protect your valuable assets. Our solutions include high impedance differential and numerical protection schemes that offer security, sensitivity and performance in a wide range of busbar configurations. Choose from centralized or distributed schemes to allow flexibility and meet your application needs.

Autoreclose and check synchronism protection devices are designed for systems where temporary or transient faults may occur frequently. Without need for other protection functions, they can be applied as stand-alone or multi-function devices in dedicated schemes, from simple to complex reclosing applications in dual circuit breaker or breaker and a half bus or mesh systems.

Our voltage and frequency protection devices are capable of highly versatile applications that can easily integrate into new and existing power distribution systems. With focus on detecting faults based on voltage or frequency measurements, users get a cost-effective solution that can also detect issues relating to power quality or instability.

If you are searching for reliable distance protection for cables and lines, look no further. Our advanced distance protection relays offer field-proven experience with sophisticated algorithms and protection characteristics such as quadrilateral, polygon or mho, which are well known for their high performance in complex applications. With subcycle operation, they offer the latest connectivity with IEC 61850, PRP, redundant Ethernet communications and cybersecurity features.

Interconnection protection relays are designed for cost-effective, highly reliable protection of rotating machines. Within the same device, dynamic line rating (DLR) functionality can be used to also optimize line capacity (up to 50%) based on weather conditions, enabling more wind, solar or distributed generation (DG) to be connected to the grid.

Protection relays for critical power are manufactured, tested and certified for applications where the safety or the availability of the energy is absolutely critical such as Nuclear power, Oil and Gas and Petrochemical plants.

Our marine protection relays use products conforming to all of the necessary standards for marine certification, while offering all of the main features of our common ranges from our wide protection relay portfolio. That means that you get all of the standard functionality, combined with the approvals needed in marine power applications.

A range of protection relays dedicated to railway applications for catenary, feeders and transformer applications. Offering high performance with field-proven experience for efficient protection of supplies and catenaries in a wide range of railway specific applications including autotransformer-fed (AT) systems.

Auxiliary protection relays include all the necessary devices needed to complete your protection scheme. With tripping relays, supervision, time delays or control applications, they are available with a variety of contact combinations and operating voltages to meet almost any scheme requirement.

Power quality is increasingly critical for distribution networks. Our measuring and monitoring units provide monitoring and consumption analysis to deliver a vital overview of the power system, detect harmonics and more.

IEC 61850, an international standard defining communication protocols, is applied in modern protection relays, RTUs, and substation automation schemes. This allows for the implementation of distributed and multi-vendor applications inside electrical substations and part of Smart Grid architectures worldwide.