Why Fanox Protection Relays are the right solution to protect renewable energy source systems.

This webinar introduces renewable energy and protection requirements and showcases some of our self-powered relays. The added value of self-powered protections

We have talked about the protections of the Wind and Photovoltaic market and ended the seminar with some interesting comments on Market trends: new challenges and solutions.

Video Webinar

Renewable energy is not a passing trend, are realities. Renewable energy is leading the energy transformation.

Infinite natural resources, such as sunlight, wind, rain, tides, waves, and geothermal heat, is derived from renewable energy.

Depending on the market practices, the economic costs, and the impact on network stability, there are different approaches to managing the wind farms and photovoltaic plants.

Slideshare Webinar

The market is demanding not only overcurrent protection, but full data registers and protection and control functions more complex: relays with reclosing capabilities, advanced communications…


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6 essential questions

  1. Why a Self-powered Relay is needed on wind farms?
  2.  Why second harmonic blocking is needed?
  3. Remote communication in self-powered relays?
  4. Why different Settings Groups?
  5. Advantages of a compact and reliable solution.SIA-B CTs Specifics
  6. Connection to the Grid. Grid code compliance?

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Secondary Distribution Protection, RMUs, and SF6 Insulated Switchgears

AUTONOMY In terms of its product lines, Fanox features internationally approved SIA-B and SIA-C Relays. This Self-powered Overcurrent and Earth-fault Protection Relays are designed to protect Secondary Transformer Stations and Distribution Centers of Electrical Networks with independence and free of maintenance.

FLEXIBILITY SIA-B and SIA-C have been designed with a very compact size to cover all customer requirements and make installation easier, faster, economical, and more reliable. Optionally you can have an auxiliary power supply in addition to self-powered function.

SIMPLICITY The SIA-B relay, as SIA-C, is Self-Powered from the power lines and both relays use STANDARD current transformers. The need for batteries and any maintenance is eliminated, reducing the operating cost of the center considerably.

KITCOM Additionally,  the equipment can be connected to an external portable accessory (KITCOM) for commissioning and setting up an office through the front communication port. The possibility of powering up with the KITCOM accessory offers the possibility to activate the trip contact from the test menu, allowing the circuit breaker’s verification before energizing the switchgear.


Impeccably suited for protection in distribution as well as in Renewable Energy systems, SIA-B Protection Relay with specific CT’s, provides a comprehensive range of protection functions in an amazingly compact and lightweight housing, preventative maintenance, and remarkable cost savings.

Remote communications RS485 Modbus RTU

  • Self-Powered & Dual-Powered (Self+Vaux)
  • Low consumption
  • Wide protection range through the Sensors
  • Load data profiling
  • Disturbance fault recording
  • With internal commissioning battery as optional

Ansi Code Functions

50, 51, 51N, 49T, 50N, 49, PGC, TB


SIA-B is the most reliable dual powered (Self-Powered + Universal Vaux) relay offering a high performance previously available only in relays with Vaux:

Remote communications for SCADA (Modbus or DNP3.0 protocols)

  • Up to 10 COMTRADE records
  • Advanced protection functions
  • Completely configurable I/O thanks to advanced logic

Ultra-fast SOTF
Very low start-up levels and minimum consumption <2 VA
Compact design

Ansi Code Functions

50, 51, 50G, 51G, 49, 46, SHB, 49T, TB, 52, 50BF, CLP, 68, PGC


Counting with extensive experience of successfully operating devices in the field worldwide and thanks to these unique advantages, SIA-C enjoys top recognition among users all around the planet.

Above all, the different mechanics available by model list make our SIA-C the best choice for our customers, covering all the needs of the market

Remote communications RS485 Modbus RTU or IEC 60870-5-103

  • Self-Powered & Dual-Powered (Self+Vaux)
  • Standard CTs /1 or /5
  • Low start-up levels
  • Load data profiling
  • Self-diagnosis (watchdog)
  • Non-volatile RAM memory (up to 1.024 events and 20 fault report), maintaining date & time even in SP mode, thanks to its internal RTC
  • With internal commissioning battery as optional
  • Withdrawable model as optional

Ansi Code Functions

50, 51, 49T, 51G, 50G, 46, 46BC, 49, SHB, CLP, 79, 52, 50BF, 74TCS, 60CTS, 68, PGC


Distribution and Transformation Substations. RMUs and SF6 Insulated Switchgears

The SIL-A is an advanced and efficient Feeder Protection Relay with reliable overcurrent and earth fault protection for primary and secondary distribution, specially developed for compact MV switchgear

SIL-A has a design that requires less equipment and space, reducing operating costs and maintenance. The optimal design makes the useful life of the device longer and enhanced safety by reducing hazards. In addition to saving installation time. The perfect solution for renewable energy installations.

Intuitive for easy handling use, SIL-A has flexible communication options for rear (RS485 for serial and RJ45 for ethernet interface) and frontal port through a micro USB connector.

In terms of rear ports, SILA is able to manage multiple industrial protocols:

  • DNP3 and Modbus (both serial or TCP versions)
  • IEC60870-5-103
  • IEC60870-5-104
  • IEC61850.

All these combinations are selectable by model or general settings.

Ansi Code Functions

50, 51, 51N, 49T, 51G, 50N, 50G, SOFT, 46, 46BC, 37, 49, SHB, CLP, 79, 52, 50BF, 74TCS, 60CTS, 86, 68, PGC, TB