SIL-A – OC&EF Line Protection Relays

The SIL-A is an overcurrent and earth fault protection relay for primary and secondary distribution with auxiliary power supply 24-220 Vdc/ 48-230 Vac.

The current measurement is obtained either by standard current transformers /1 or /5, or by special Low Power Current Transformers (LPCT).

SIL-A has also many smart protection functions: 50(2), 50N/G (2)(1), 50/51, 50/51N/G(1), 50BF, 46, 52, 79, 74TCS, COLD LOAD PICKUP, 86, 49T and optionally 49, 74CT, 37, 46 BC, trip block for switch disconnector.

And the main applicationd of these Relays are distribution and transformation substations.

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English / Data Sheet OCPrimary Distribution SIL-A

Features

  • The SIL-A is an overcurrent and earth fault protection relay for primary and secondary distribution with auxiliary power supply 24-220 Vdc/ 48-230 Vac. The current measurement is obtained either by standard current transformers / 1 or /5, or by special Low Power Current Transformers (LPCT).
  • Metalic box with high electromagnetic compatibility level (EMC) and wide range of operating temperature.
  • Direct signalling/control both of the circuit breaker (52 function), both of the recloser (79 function).
  • Zone selection interlocking (ZSI) function is available through configuarble inputs and outputs thanks to the programmable logic.
  • To allow the communication, relays have a communication port on the front of the equipment and remote communication with different options (ports and protocols) on the back:
    • RS485 PORT: IEC60870-5-103, Modbus RTU or DNP3.0 Serial, selectable by model/settings.
    • RJ45 PORT: IEC 61850, Modbus TCP/IP, DNP3.0 TCP/IP or IEC 60870-5-104, selectable by model/settings).
  • The SIL-A has configurable and dedicated inputs and inputs, depending on adaptation:
    • Adaptation “B”: 6 configurable Digital Inputs and 4 configurable Digital Outputs.
    • Adaptation “C”: 4 configurable Digital Inputs, 2 dedicated Digital Inputs and 4 Digital Outputs.
  • SIL-A is fitted with the demand of current (Load Data Profiling) with the following characterístics:
    • Number of records: 168
    • Recording mode circular
    • Sampling rate (Interval): configurable through communications (1-60 min)

Protection Functions

​50 Phase instantaneous overcurrent
50N/G Neutral instantaneous overcurrent calculated/measured
50/51 Inverse time phase overcurrent
50/51N/G Inverse time neutral overcurrent calculated/measured
50BF Circuit Breaker opening fault
46 Negative sequence instantaneous overcurrent
52 Circuit Breaker monitoring
79 Autorecloser
74TCS Trip circuit supervision
CLP Cold Load Pick-up
86 Trip output lockout with PLC
49T Trip output
49 Thermal image
74CT Phase CT supervision
37 Instantaneous phase undercurrent
46BC Broken conductor detection
68 Trip Bus
TB Trip Block for switch disconnector

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® 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.

Comparison Table

SIL RANGESIL-DSIL-ASIL-BSIL-GSIL-VSIL G NEW
TypeOC & EF FOR PRIMARY DISTRIBUTIONOC & EF FOR PRIMARY DISTRIBUTIONFEEDER PROTECTIONGENERATOR PROTECTIONGENERATOR PROTECTIONGENERATOR PROTECTION
Auxiliary Supply24-220 Vdc/48-230 Vac24-220 Vdc/48-230 Vac24–48Vdc
90-300Vdc/110-230Vac		24–48Vdc
90-300Vdc/110-230Vac		24-220 Vdc/48-230 Vac24-220 Vdc/48-230 Vac
Self-powered through the VTs
Consumption3,3 – 4,5 W3,3 – 4,5 W3,3 – 5,5 W3,3 – 5,5 W3,3 – 5,5 W
Current measurementStandard CT 0,5VAStandard CT 0,5VAStandard CT 0,5VAStandard CT 0,5VAStandard CT 0,5VA
LPCT√
Voltage measurementVTVTVT or directly from the lineDirectly to low power line
VT connection typeAdjustableAdjustable
5022222
50N/G22222
50/5111
50/51N/G1
67NI2
50/51/67N2222
50/51/67222
52111111
BF111111
491111
49T11111
79111111
461111
CLP11111
74TCS111111
Trip Block11
68 (Trip Bus)1
86√√√√√√
46BC√
74CT1
Programmable LogicV3V3V1V1V3V3
371221
592222
59N2222
4711
272222
27V111
32/40444
81U/O4444
25111Optional
81R424
78211
IRIG-B√√Optional
Counters√√√√√√
Commands√√√√√√
Sett. Group443334
Inputs668868 / 16 / 8 + 4 AFD
Outputs2 NO + 2 NC – NO2 NO + 2 NC – NO2 NC – NO + 5 NO2 NC – NO + 5 NO2 NO + 2 NC – NO7 / 11 / 7 + 4 HS-O
LEDs8 configurable8 configurable6 configurable6 configurable8 configurable8 configurable + 3 non-configurable
HMI20X2 LCD + 7 keys20X2 LCD + 7 keys20X2 LCD + 7 keys20X2 LCD + 7 keys20X2 LCD + 7 keys20X4 LCD + 13 keys
52 & 79 HMI2 led’s + 3 keys2 led’s + 3 keys2 led’s + 3 keys2 led’s + 3 keys2 led’s + 3 keys2 led’s + 4 keys
Event200200100010002002048
Fault Report2020202020100
Oscillography5 records x 100 cycles5 records x 100 cycles2 records x 138 cycles2 records x 138 cycles5 records x 88 cycles100 records x 1500 cycles
Current demand√
Local Port (frontal)RS232RS232USBUSBRS232USB
Remote Port (rear)RS485 or EthernetRS485 or EthernetRS485 + RS485
Ethernet + RS485		RS485 + RS485
Ethernet + RS485		RS485 or EthernetRS485 or Ethernet or Fiber Optic
Communications ProtocolsModBus RTU
IEC60870-5-103
IEC60870-5-104
DNP3.0 (TCP/IP)
IEC61850		ModBus RTU
IEC60870-5-103
IEC60870-5-104
DNP3.0 (TCP/IP)
IEC61850		ModBus RTU
IEC60870-5-103
IEC60870-5-104
DNP3.0 (TCP/IP)
IEC61850		ModBus RTU
IEC60870-5-103
IEC60870-5-104
DNP3.0 (TCP/IP)
IEC61850		ModBus RTU
IEC60870-5-103
IEC60870-5-104
DNP3.0 (TCP/IP)
IEC61850		Modbus RTU
DNP3.0 Serial
IEC 60870-5-103
Modbus TCP/IP
DNP3.0 TCP/IP
IEC 61850
Size of177 x 107 mm177 x 107 mm241,31 x 177,80 mm241,31 x 177,80 mm177 x 107 mm198 x 198 mm

Related Products

SIL-D
Directional Protection Relays

Fanox SIL-D brings you all features included in our SIL-A relays adding the highly requested Neutral Directional protection function for an even wider protection.

Protection functions:

  • (2) 50 + 50/51 + (2) 50N/G + (2) 50N/51N/67N + 52 + 50BF + 79 + 74TCS + CLP + 86 + 49T + 59N + TB.
  • 67NI_1 + 67NI_2 as additional protection functions.