SIA-C Standard CT’s


SIA-C is an Overcurrent and Earth Fault Protection Relays with Self Powered or Dual Powered (self + auxiliary) models.

The relay is self powered using the operating current  through three /5 (<5VA) or /1 (<2.5VA) standard current transformers fitted on the lines. These transformers are  also  used to obtain  current  measurements. Besides, SIA-C relay can  be used with auxiliary power supply  (24 Vdc, 230 Vac, 48 Vdc or 100-230 Vdc/ac). The relay can  also be occasionally supplied by an external  battery portable kit (KITCOM).

Front   port   connection  (ModBus   RTU  protocol)   for  local   communication. Remote communication through rear RS485 (ModBus RTU or IEC 60870-5-103 selectable by general  setting).

The operating costs of the centre are realy reduced because of the installation and subsequent maintenance of batteries is eliminated.

In self powered mode, the start-up of the relay from low energy levels, 0.1 times of the nominal current in three phases, ensures capacity to trip.

Non-volatile  RAM memory  in order  to  store  up  to  1024  events and  20  fault report and, depending on model, disturbance fault recording (10 oscillographic records in COMTRADE format), maintaining date & time, thanks to its internal RTC (Real time clock) even without power  supply.

SIA-C enjoys top recognition among users all around the world. This relay is extremely experienced of successfully operating devices in the field worldwide.

Considering these advantages, SIA-C can be used in multiple applications, and different mechanics have been developed to cover all clients’ requirement. SIA-C is the best choice for our customers, covering all the needs of the market.

Main Applications: Secondary Distribution Protection, RMU’s, MRMU’s and SF6 insulated switchgears

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Save Money using ONE Self-powered Relay for TWO Applications

A relay with different settings for normal operation and maintenance tasks is a requirement that is gaining more and more importance not only to speed up the process, but also to comply with newer an severer safety procedures.

So far, 2 relays, one for each application, are installed, but this solution is not practical considering the compact sizes of the RMUs and the importance of finding economic solutions for this purpose.

Fanox SIA-C with Standard CT’s Relay is provided with 4 separated settings groups that will allow the user to set different settings depending on the application. The Relay is provided with configurable inputs that are activated without external supply. By activating the corresponding inputs the relay will change automatically to the desired group . In addition, if configurable LEDs are used to indicate the settings group that the relay is working with.

SIA-C Relay becomes the most reliable solution to save money, to facilitate the settings process and to offer the best protection even when auxiliary supply is not available.

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Overcurrent & Earth Fault Protection Relay

Secondary Distribution Protection, RMU’s, MRMU’s and SF6 insulated switchgears

  • The SIA-C is a overcurrent protection relay with self powered and dual powered (self + auxiliary) models.
  • The relay is self powered using the operating current through three /5 (<5VA) or /1 (<2.5VA) standard current transformers fitted on the lines. These transformers are also used to obtain current measurements. Besides, SIA-C relay can be used with auxiliary power supply (24 Vdc, 230 Vac, 48 Vdc or 100-230 Vdc/ac). The relay can also be occasionally supplied by an external battery portable kit (KITCOM).
  • Internal commissioning battery as optional. Lithium battery: 20 years lifetime.
  • Front port connection (ModBus RTU protocol) for local communication. Remote communication through rear RS485 (ModBus RTU or IEC 60870-5-103 selectable by general setting).
  • Specific test menu is provided and configurable inputs and outputs
  • High electromagnetic compatibility (EMC).
  • The installation and subsequent maintenance of batteries is eliminated. The operating costs of the centre are reduced.
  • In self powered mode, the start-up of the relay from low energy levels, 0.1 times of the nominal current in three phases, ensures capacity to trip.
  • The line opening mechanism is activated either by means of a striker PRT, operated by the energy supplied by the relay itself, or by a coil using the TCM trip adapter in case it is necessary.
  • There are bistable magnetic indicators which indicate the trip cause, maintaining their position even though the relay loses the supply (flags).
  • Self diagnosis of the status (Watchdog) through leds and physical outputs.
  • The SIA-C is fitted with the demand of current (Load Data Profiling) with the following characteristics:
    • Number of records: 168
    • Recording mode: circular
    • Sampling rate (interval): configurable through communications: 1-60 min.
  • Non-volatile RAM memory in order to store up to 1024 events and 20 fault report and, depending on model, disturbance fault recording (10 oscillographic records in COMTRADE format), maintaining date & time, thanks to its internal RTC (Real time clock) even without power supply.

50 Instantaneous Phase Overcurrent
51 Inverse time overcurrent
49T External trip
51G Inverse time measured neutral overcurrent
50G Instantaneous measured neutral overcurrent
46 Phase Balance current Protection
46BC Broken Conductor Detection
49 Thermal Image
SHB Second Harmonic Blocking
CLP Cold Load Pickup
79 AC Reclosing device
52 Breaker wear Monitoring
50BF Circuit Breaker Opening Failure
74TCS Trip Circuit Supervision
60CTS Phase CT Supervision
68 Zone selection interbloking
PGC Programmable Logic Control

Communication Software for SIA & SIL protection relays

The SICom PC software has been designed and programmed to gain access to all of Fanox relays information, to modify the settings and configuration, check states and measurements and to analyse and save events and fault reports using a graphic-friendly user interface.

SICom software works with the Windows® Windows 7, Windows 8, Windows 8.1 and Windows 10 operating system.

  • General data reading: Complete model, Version, Serial number, etc.
  • States reading
  • Measurements reading
  • Reading and changing settings
  • Reading and changing configuration
  • Reading and deleting events
  • Reading and deleting fault reports
  • Reading and deleting demand current (load data profiling)
  • Reading and saving oscillographic records in Comtrade format
  • Changing the user passwords
  • Saving and Loading settings files
  • Saving and Loading configuration files
  • Saving events and fault reports
  • Saving demand current (load data profiling)
  • Date-time synchronization
  • Configuring the communication parameters
  • Reading and changing counters
  • Commands for opening and closing the circuit breaker and block/unblock the recloser
  • Configuration of the inputs
  • Configuration of the outputs
  • Configuration of the causes that start a Fault Report

The update of the software does not require any user´s action, this is, if the computer is connected to Internet, SICom updates itself when it is started.
It will allow you to prepare all the settings and relay configurations without having the relay connected to the PC (offline mode), reducing engineering and commissioning time.
SICom program uses Modbus protocol, so only the ports with this protocol can be used to establish the communication.

SIA RANGESIA-B Specific CT'sSIA-B Standard CT'sSIA-C Standard CT'sSIA-F
TYPESELF & DUAL POWERED (SELF+AUX)SELF & DUAL POWERED (SELF+AUX)SELF & DUAL POWERED (SELF+AUX)AUXILIARY POWERED
Auxiliary Supply24Vdc
110Vac
230Vac
24-230 Vac/dc24Vdc
230Vac
48 Vdc
110-230 Vac/Vdc
24-220 Vcc / 48-230 Vac
Self Power Supply3.2 A for CT08-5 6.4 A for CT16-5 12.8 A for CT32-5 25.6 A for CT64-5 51.2 A for CT128/5 102.4 A for CT256/5 (x3)0,075 In (x3)0,1 In (x3)
External batteryUSB cable / Power bankUSB cable / Power bankKITCOMUSB cable / Power bank
Internal battery√ (*)√ (*)
Consumption0,5 W1,5 W0,5 W1,5 – 2,2 W
CTSpecific CTStandard CT/1A - 2VAStandard CT/1A - 2.5VA Standard CT/5A - 5VAStandard CT/1 - 0,5VA Standard CT/5A - 0.5VA
501221
50G221
50N1
511111
51G111
51N1
SHB11
74CT1
46BC1
4611
791
52111
50BF111
491111
49T1111
CLP111
74TCS 1
Trip Block111
68 Zone Selection interbloking111
86
PGCProgrammable LogicV3V3V3V3
Counters
Commands
Sett. Group243/43
Inputs--- EXT.TRIP3 DI--- EXT.TRIP 2DI 2DI + EXT.TRIP--- 2DI
Outputs--- 2NC-NO3 NC-NO--- 2 NC-NO 3 NO1 NO + 1 NC-NO
Output for STRIKER24 Vdc – 135 mJ24 Vdc – 135 mJ24 Vdc – 135 mJ
LEDs2 LEDs 2 LEDs +1MAG.FLAG4 LEDs3 LEDs + 1 MAG.FLAGS 3 LEDs + 3 MAG.FLAGS3 LEDs configurable
HMI20X2 LCD + 7/8 keys20X2 LCD + 8 keys20X2 LCD + 7/8 keys20X2 LCD + 7 keys
Event10010241024200
Fault Report420204
Oscillography10 records x 50 cycles10 records x 50 cycles1 record x 22 cycles
Current demand
Local Port (frontal)USBMicro USBRS232USB
Remote Port (rear)RS485RS485RS485RS485
Communications ProtocolsModBus RTUModBus RTU ModBus RTU or DNP3.0ModBus RTU ModBus RTU or IEC60870-5-103ModBus RTU DNP3.0
Size of (HxW)Vertical: 120,65 x 167,80 mm
Horizontal: 185,80 x 102,7 mm
90 X 245 mmVertical Compact: 177 x 155 mm
Vertical Standard: 177 x 189 mm
Horizontal: 177,8 x 290,3 mm
167,80 x 120,65 mm

Related Products

SIA-B Standard CT’s
Advanced OC&EF Self-Powered Relay

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

SIA-B Specific CT’s
Dual & Self-Powered OC&EF Protection Relays

Impeccably suited for protection in distribution as well as in Renewable Energy systems, SIA-B compact relay provides a comprehensive range of protection functions in an amazingly compact and lightweight housing providing maintenance free and a 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-F
SF6 & Metalclad Switchgear Protection Relay

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.

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 power supply.

Ansi Code Functions

50, 50/51, 50N/G, 50/51N/G, 52, 49T, 68, 86, CLP, 50BF, 49, TB