PROTECTION RELAYS FOR YOUR SUCCESS
Fanox specializes in the Design and Manufacture of Protection and Control Relays, becoming an expert in SELF-POWERED Protection Relays, which considerably reduces the maintenance of distribution centers.
The wide range of high-quality Protection Relays provides the solutions demanded by the market. Being evidenced by a successful proven experience and thousands of installed devices operating in harsh conditions for more than 20 years. High electromagnetic compatibility makes Fanox Relays the safest in the market. KEMA Certification proves it.
Our relays include the latest technology: SCADA communications, PC software, event recording, LCD, and keyboard…
Download the COMPARISON TABLE and choose the relay that best suits your installation:
SELF-POWERED PROTECTION RELAYS
Secondary Distribution Protection, RMUs, and SF6 Insulated Switchgears
AUTONOMY Regarding its product lines, Fanox features internationally approved SIA-B and SIA-C Relays. These 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, more economical, and more reliable. Optionally it can have an auxiliary power supply and a self-powering function simultaneously.
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 center’s operating cost 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 verification of the circuit breaker before energizing the switchgear.
SIA-B SPECIFIC CTs
DUAL & SELF-POWERED OC&EF PROTECTION RELAYS
The SIA-B Self-powered Protection Relay is a Secondary Distribution Protection prepared to work with RMUs, MRMUs, and all SF6 insulated Switchgears in the market for MV applications. It is impeccably suited for distributed renewable generation operators such as solar parks and wind turbines.
SIA-B Protection Relay with specific CTs provides a comprehensive range of protection functions in 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, 50N, 51N, SHB, 49T, 49, TB, PGC
Additional Functions
RTC, PGC, HMI, SER, DFR, MET, STTG, CMMD
SIA-B STANDARD CT’s
DUAL & SELF-POWERED OC&EF PROTECTION RELAYS
SIA-B is the most reliable dual powered (Self-Powered + Universal Vaux) protection 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
Additional Functions
CNT, RTC, PGC, HMI, SER, DFR, LDP, MET, STTG,CMMD
SIA-C STANDARD CT’s
DUAL & SELF-POWERED OC&EF PROTECTION RELAYS
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
Additional Functions
CNT, RTC, PGC, HMI, SER, DFR, LDP, MET, STTG, CMMD
LINE PROTECTION RELAYS
SIL-A
FEEDER PROTECTION RELAYS
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. Optional directional earth fault (isolated neutral included) and ground overvoltage protection.
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 the rear (RS485 for serial and RJ45 for ethernet interface) and a 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
- Supports IEC 61850 standard edition 1 and 2, implementing GOOSE messaging for the automation and control of substations
All these combinations are selectable by model or general settings.
Ansi Code Functions
50, 51, 50N, 50G, 51N, 51G, 67G/51G, 67NI, 67GI, SOTF, 46, 46BC, 64REF, 37, 49, 49T, SHB, 52, 50BF, 74TCS, 79, CLP, 60CTS, 59G, 86, 68, TB, PGC
* ANSI 67G can be converted into ANSI 51G by setting the “Directionality” parameter to NO
Additional Functions
CNT, RTC, ALRM, PGC, HMI, SER, DFR, LDP, MET, STTG, CMMD
SIA-F
SF6 & METAL-CLAD SWITCHGEAR PROTECTION RELAYS
Fanox SIA-F is our most competitive and cost-effective solution for overcurrent and earth-fault protection. Like all other Fanox protection relays the compact size with reduced depth makes it easier to install and saves costs.
The relay can be also supplied by a USB cable connected to the laptop, with the USB KITCOM adapter or a standard power bank. To allow the communication, relays are provided with a local micro USB front port and with remote communication with different protocols on the rear side depending on the model.
Additionally, the use of external CTs allows you to modify their relation adapting to your requirements and reducing installation costs while having a wider range of power supply.
Ansi Code Functions
50, 51, 50G, 51G, 49, 52, 50BF, 86, 68,TB, PGC
Additonal Functions
CNT, RTC, PGC, HMI, SER, DFR, LDP, MET, STTG, CMMD
VOLTAGE & FREQUENCY PROTECTION RELAYS
SIU-C
VOLTAGE & FREQUENCY PROTECTION RELAYS
The SIU-C is a voltage and frequency protection relay and represents the best and most precise protection solutions for transformers and electrical machines, in high, medium, and low voltage distribution systems. Also protects against decoupling, load shedding, and loss of main (islanding).
- For transformers or electrical machines, Sf6 & metal-clad switchgear protection
- Signaling/control of the circuit breaker (52 function) and the recloser (79 function)
- Remote communication with different options ports and protocols: RS485; IEC60870-5-103, Modbus RTU, DNP3.0, RJ45; Modbus TCP/IP, DNP3.0 TCP/IP or IEC60870-5-104 + Web Server + SNTP Protocol
Ansi Code Functions
59, 59-L, 59N/G, 47, 27, 27-L, 27V1, ∆V/∆t, 81O/U, 81R (ROCOF), 78 (Vector Shift), 24, 79, HLT, 52, 25, BF, 74TCS, 74CCS, 49T, 86, PGC
ADDITIONAL FUNCTIONS
CNT RTC ALRM PGC HMI SER DFR LDP MET STTG CMMD

FEEDER & GENERATOR PROTECTION RELAYS
Feeder & Generator Protection Relays are designed for effective protection of primary and secondary switching substations of electric distribution network. The protection features include protection against the current, voltage, frequency, power, and including function as synchronism and autorecloser.
The protection functions can be enabled by using both the front panel and the communications link to the SICom program.
The combination of the available IEC and ANSI-IEEE curves and settings allows precise coordination with other devices.
For complete information management, several communication protocols are included in this Relays.
SIL-G
FEEDER & GENERATOR PROTECTION RELAYS
Protection for Renewable Energy Facilities, Industrial Plants and Secondary Network
The SIL-G is a complete protection and control relay used in primary and secondary distribution networks for feeder and generator applications.
This relay is capable to operate with current, voltage, power, and frequency functions and is suitable to be implemented in substations levels for Utility Companies and industrial electrical systems for the renewable sector or any other.
- It can be used in installations with different voltage level since It is able to work with auxiliary supply from 24 to 230 V dc/ac
- Supports IEC 61850 standard edition 1 and 2, implementing GOOSE messaging for the automation and control of substations
- Interoperability with other systems
- Includes a special module for Arc Flash Detection (AFD) with sensors included as a complete solution
- Safe and secure by implementing Wi-Fi with WPA2-AES encryption and secure access levels
- Offers island protection by identifying wave changes based on voltage and frequency elements
Ansi Code Functions
50, 67/51, 50N, 50G, 67N/51N*, 67G/51G*, 67NA, 67GA, SOTF, 46, 46BC, 64REF, 49, 49T, 37, SHB, 59, 59N/G, 59L, 47, 27, 27L, 27V1, 32, 81O/U, 81R (ROCOF), 78, CLP, 79, HLT, 52, 25, 50BF, 74TCS, 60CTS, 60VTS, 86, 68, PGC
* ANSI 67, ANSI 67G, and ANSI 67N can be converted into ANSI 51, ANSI 51G, and ANSI 51N respectively by setting the “Directionality” parameter to NO.
Additional Functions
CNT, RTC, ALRM, PGC, HMI, SER, DFR, LDP, MET, STTG, CMMD
SIL-C
FEEDER & GENERATOR PROTECTION RELAYS
In a compact device, the SIL-C Relay protects Feeders and Equipment and includes comprehensive current, voltage, and frequency protection for switchgear in industrial and utility applications.
Its ability to measure up to 1,000 volts when connected directly to the low voltage line, makes it very reliable and provides 4 current channels and up to 5 voltage channels with conventional VTs
Relays are provided with a local micro USB front port and remote communication with different options (ports and protocols) to allow communication. The SIL-C is provided with 11 configurable inputs and 5 configurable outputs.
Ansi Code Functions
50, 67/51, 50N, 50G, 67N/51N, 67G/51G, 67NI, 67GI, SOTF, 46, 46BC, 64REF, 37, 49, 49T, SHB, 59, 59N/G, 59L, 47, 27, 27L, 27V1, 32, 81O/U, 81R, 78, 24, CLP, 79 AC, HLT, 52, 25, 50BF, 74TCS, 60CTS, 60VTS, 86, 68, PGC
* ANSI 67, ANSI 67G, and ANSI 67N can be converted into ANSI 51, ANSI 51G, and ANSI 51N, respectively, by setting the “Directionality” parameter to NO.
Additional Functions
CNT, RTC, ALRM, PGC, HMI, SER, DFR, LDP, MET, STTG, CMMD

RECLOSER CONTROL RELAYS
SIR-B is the latest design advancement for Recloser Controls, taking particular care on simplicity and future upgradeability. It has a completely high-performance design ready for the smart grid.
It is designed to be a flexible, easy to use control that has been built keeping in mind the specifications of utility crews and field operators.
The intelligence that enables a recloser to sense overcurrents, select timing operation, time the tripping and reclosing functions, and finally lockout is provided by the recloser control.
SIR-A
RECLOSER CONTROL & FEEDER PROTECTION RELAY
The Fanox SIR-A is the Relay that offers the complete solution for Recloser Control and Feeder Protection with current, voltage, and frequency functions for Primary and Secondary distribution.
- SIR-A has 4 current channels and up to 6 voltage channels, with the advantage of measuring the voltage through capacitive and resistive sensors.
- Intuitive for easy handling use, with flexible communication options and power supply control and monitoring
- Adaptation C:
- Thirteen (13) programmable alarm LEDs + 8 configurable keys with their associated configurable LED.
- Rear RS485 or RS232 port (selectable by the user, both ports are not available simultaneously)
Ansi Code Functions
50, 67/51, 50N, 50G, 67N/51N, 67G/51G, 67NI, 67GI, SOTF, 46, 46BC, 49, 49T, 37, SHB, 59, 59N, 59-L, 59N-L, 47, 47-L, 27, 27-L, 27V1, 27V1-L, 32, 81O/U, 81R, 78, CLP, 79, SCM, SZM, 52, 25, HLT, 50BF, 74TCS, 60CTS, 60VTS, 86, 68, PSC, PGC
* ANSI 67, ANSI 67G, and ANSI 67N can be converted into ANSI 51, ANSI 51G, and ANSI 51N, respectively by setting the “Directionality” parameter to NO
Additional Functions
CNT, RTC, ALRM, PGC, HMI, SER, DFR, LDP, MET, STTG, CMMD
SIR-C
Feeder Protection & Recloser Control Relay
The Fanox SIR-C is the relay that offers the optimal solution for recloser control and line feeder protection for primary and secondary distribution, by means of current, voltage and frequency functions.
It is available with 24-230 Vdc/AC, 48-230 Vdc/AC or 24-48 Vdc auxiliary power supply (depending on the model that best suits the needs of the installation).
- 4 current channels and up to 6 voltage channels, with the advantage of measuring the voltage through capacitive or resistive sensors.
- Very intuitive and easy to use
- Allows communications; rear port (RS485 for serial and RJ45 for ethernet interface) and front port through a micro USB connector.
- Multiple industrial protocols: DNP3.0 and Modbus RTU, IEC60870-5-103, IEC60870-5-104, IEC61850.
- Clears fault quickly through SOFT (Switch On To Fault) function.
Ansi Code Functions
50, 67/51, 50N, 50G, 67N/51N, 67G/51G, 67NI, 67GI, SOTF, 46, 46BC, 64REF, 49, 49T, 37, SHB, 59, 59N, 59-L, 59N-L, 47, 47-L, 27, 27-L, 27V1, 27V1-L, 32, 81O/U, 81R, 78, CLP, 79 AC, SCM, SZM, HLT, 52, 25, 50BF, 74TCS, 60CTS, 60VTS, 86, 68, PGC
*ANSI 67, ANSI 67G, and ANSI 67N can be converted into ANSI 51, ANSI 51G, and ANSI 51N, respectively by setting the “Directionality” parameter to NO.
Additional Functions
CNT, RTC, ALRM, PGC, HMI, SER, DFR, LDP, MET, STTG, CMMD

Download the COMPARISON TABLE and select the relay that best suits your needs:
FANOX PROTECTION APPLICATION DIAGRAM
