SIU-C Voltage & Frequency Protection Relay

The SIU-C represents the best and most precise protection solution for transformers and electrical machines, in high, medium, and low voltage distribution systems. The SIU-C is a voltage and frequency protection relay and also protects decoupling, load shedding, and loss of main (islanding),  universal with auxiliary power supply of 24-230 Vdc/ac.

Notable for the capability of measuring up to 1.000 volts when it is connected directly to the low voltage line. Voltage measurement: 5 voltage channels for conventional.

To allow the communication, relays are provided with a local micro USB front port and with remote communication with different options ports and protocols; Rear RS485 Port: IEC60870-5-103, Modbus RTU, or DNP3.0 Serial. RJ45 Port: Modbus TCP/IP, DNP3.0 TCP/IP or IEC60870-5-104 + Web Server + SNTP Protocol.

The SIU-C is provided with 11 configurable inputs and 5 configurable outputs. It is provided with non-volatile RAM memory in order to store up to 3072 events and disturbance fault recording (DFR), maintaining date & time thanks to its internal RTC (real Time Clock).

Fanox counts with its own SICom Communications Program allows the oscillography record to be downloaded and saved in COMTRADE format (IEEE C37.111-1991)

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    Technical Sheet

    EN / FANOX DATA SHEET VoltageFrequency SIU-C R06.pdf

    Features

    • The SIU-C is a voltage and frequency protection relay for transformers and electrical machines, in high, medium, and low voltage distribution systems. Also protects decoupling, load shedding, and loss of main (islanding), universal with auxiliary the power supply of 24-230 Vdc/ac.
    • Voltage measurement: 5 voltage channels for conventional VTs.
    • The capability of measuring up to 1.000 volts when it is connected directly to the low voltage line.
    • Metallic box with high electromagnetic compatibility level (EMC) and a wide range of operating temperatures.
    • Protection of decoupling, load shedding, and loss of main (islanding). Loss of Main (islanding) occurs when part of the public utility network loses connection with the rest of the system. If this situation is not detected, then the generator could remain connected, causing a safety hazard within the network. Automatic reconnection of the generator to the network may occur causing damage to the generator and the network. SIU-C protection relay detects this situation thanks to its voltage and frequency functions focused on the Rate of change of frequency (ROCOF) method.
    • Signaling/control of the circuit breaker (52 function) and the recloser (79 function).
    • To allow the communication, relays are provided with a local micro USB front port and with remote communication with different options (ports and protocols) on the rear side:
      • Rear RS485 Port: IEC60870-5-103, Modbus RTU or DNP3.0 Serial.
      • Rear RJ45 Port: Modbus TCP/IP, DNP3.0 TCP/IP or IEC60870-5-104 + Web Server + SNTP Protocol
    • Synchronization through IRIG-B is optional depending on the model.
    • The SIU-C is provided with 11 configurable inputs and 5 configurable outputs.
    • The SIU-C is fitted with the demand of voltage (Load Data Profiling) with the following characteristics:
      • The number of records: 2160.
      • Recording mode circular.
      • Sampling rate (interval): configurable through communications (1-60 min).
    • An alarms panel is available.
    • SIU-C is provided with non-volatile RAM memory in order to store up to 3072 events and disturbance fault recording (DFR), maintaining date & time thanks to its internal RTC (Real Time Clock).
      • 5 records in data and COMTRADE format (300 cycles each record): 1 to 8 pre-fault cycles + 292 to 299 postfault cycles.
      • 25 records in data and COMTRADE format (60 cycles each record): 1 to 8 pre-fault cycles + 52 to 59 postfault cycles.
      • 50 records in data and COMTRADE format (30 cycles each record): 1 to 8 pre-fault cycles + 22 to 29 postfault cycles.
      • 100 records in data and COMTRADE format (15 cycles each record): 1 to 8 pre-fault cycles + 7 to 14 postfault cycles.)
    • The oscillography is downloaded by a communications port.
      The SICom communications program allows the oscillography record to be downloaded and saved in COMTRADE format (IEEE C37.111-1991).

    Ansi Code Functions

    59 Phase overvoltage (Bus Bar)
    59-L Phase overvoltage (Line)
    59N/G Calculated/Measured neutral overvoltage (Bus Bar)
    47 Phase Balance voltage protection (Bus Bar)
    27 Phase Undervoltage (Bus Bar)
    27-L Phase undervoltage (Line)
    27V1 Positive sequence Undervoltage (Bus Bar)
    ∆V/∆t Rate of change of voltage
    81O/U Under/Overfrequency
    81R Rate of change of Frequency (ROCOF)
    78 Out of Step (Vector Shift)
    24 Overfluxing
    79 AC Reclosing device
    HLT Hot Line Tag
    52 Breaker wear monitoring
    25 Synchro Check
    BF Circuit Breaker Failure
    74TCS Trip Circuit Supervision
    74CCS Close Circuit Supervision
    49T External Trip
    86 Trip lockout
    PGC Programmable logic control

    ADDITIONAL FUNCTIONS

    CNT Counters
    RTC Real Time Clock
    ALRM Alarm panel
    PGC Programmable Logic Control
    HMI Human Machine Interface
    SER Sequential Event Recording
    DFR Disturbance Fault Recording
    LDP Load Data Profiling
    MET Metering
    STTG Settings Groups
    CMMD Commands

    Software

    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®7, Windows®8, Windows®8.1 y 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.

    Application

    Comparison Table

    SIL-ASIU-CSIL GSIL-C
    TypeOC & EF PROTECTIONVOLTAGE & FREQUENCY PROTECTIONLINE, FEEDER AND GENERATOR PROTECTIONLINE, FEEDER AND GENERATOR PROTECTION
    Auxiliary Supply24-230 Vdc/Vac24-230 Vdc/Vac24-48Vdc or 48-230 Vac/dc or 24-230 Vac/dc24-230 Vdc/Vac
    Consumption3,3 – 4,5 W< 6 W. 24-230 Vdc/Vac < 10VA24-48 Vdc and 48-230 Vac/dc < 10VA. 24-230Vac/dc < 20VA24-230Vac/dc < 20VA
    Current measurementStandard CT > 0,5VAn/aStandard CT > 0,5VAStandard CT > 0,5VA
    LPCTn/an/an/an/a
    Voltage measurementn/aVT or directly to the low voltage lineVT or directly to the low voltage lineVT or directly to the low voltage line
    VT connection typen/aAdjustableAdjustableAdjustable
    502n/a22
    50G2n/a11
    50N2n/a11
    50/512n/a4 levels of 67 *4 levels of 67 *
    50/51G2n/a2 levels of 67G *2 levels of 67G *
    50/51N2n/a2 levels of 67N *2 levels of 67N *
    67GI1n/a11
    67NI1n/a11
    50/51/67G 1n/a**
    50/51/67n/an/a**
    SOFT1n/a11
    64REF1n/a11
    521111
    BF1111
    491n/a11
    49T1111
    791111
    HLTn/a√√√
    461n/a11
    CLP1n/a11
    74TCS1111
    74CCSn/a1n/an/a
    Trip Block1n/a11
    68 (Trip Bus)1111
    86√√11
    46BC√n/a11
    60CTS 1n/a11
    60VTSn/an/a11
    Programmable LogicV3V3√√
    371n/a11
    59n/a222
    59N1322
    47n/a111
    27n/a422
    27V1n/a211
    32/40n/an/a44
    81U/On/a844
    25n/a111
    24n/a222
    59-Ln/a111
    27-Ln/a111
    81Rn/a644
    78n/a211
    IRIG-Bn/aOptionalOptionalOptional
    Counters√√√√
    Commands√√√√
    Sett. Group4444
    Inputs3 / 5 / 6 / 9118 / 16 / 24 / 8 + 4 AFD11
    Outputs3 / 4 / 5 / 6 / 757 / 11 / 18 / 7 + 4 HS-O5
    LEDs8 configurable11 configurable11 configurable11 configurable
    HMI20x2 LCD + 11 keys20x4 LCD + 13 key20x4 LCD + 13 keys20x4 LCD + 13 keys
    52 & 79 HMI2 LEDs + 4 keys2 LEDs + 4 keys2 LEDs + 4 keys3 LEDs + 4 keys
    Event2048307230723072
    Fault Reportconfigurable up to 100configurable up to 100configurable up to 100configurable up to 100
    OscillographyConfigurable up to 100 recordsconfigurable up to 100configurable up to 100configurable up to 100
    Current demand√n/a√√
    Local Port (frontal)Micro USBMicro USBMicro USBMicro USB
    Remote Port (rear)RS485 or EthernetRS485 or EthernetRS485 or Ethernet or Fiber OpticRS485 or Ethernet
    Communications ProtocolsRS485 (ModBus RTU or IEC60870-5-103 or DNP3.0 Serial) RJ45 (Modbus TCP/IP or DNP3 TCP/IP or IEC 60870-5-104) RJ45 (IEC61850) + SNTP protocolRS485(ModBus RTU or DNP3.0 Serial or IEC60870-5-103) RJ45 (Modbus TCP/IP or DNP3.0 TCP/IP or IEC60870-5-104) + SNTP protocolRS485(ModBus RTU or DNP3.0 Serial or IEC60870-5-103) RJ45(Modbus TCP/IP or DNP3.0 TCP/IP or IEC60870-5-104) RJ45(IEC 61850) FO-LC(IEC61850) + SNTP protocolRS485(ModBus RTU or DNP3.0 Serial or IEC60870-5-103) RJ45 (Modbus TCP/IP or DNP3.0 TCP/IP or IEC60870-5-104) + SNTP protocol
    Size of177 x 107 mm177 x 107 mm198 x 187 mm177 x 107 mm

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