Earth fault and overload protection relay
FANOX
SIL-A
- The SIL-A is a feeder relay that includes overcurrent and earth fault protections for primary and secondary distribution fitted with an auxiliary power supply of 24-230 Vac/dc.
- 4 current channels for conventional /1 and /5 current transformers and an optional 1 voltage channel for conventional VTs.
- Metal housing with a high electromagnetic compatibility level (EMC) and a wide range of operating temperature.
- Signaling and control of the circuit breaker (52 function) and the recloser (79 function).
- The front part of the SIL-A relays is provided with a navigation keypad made of 7 keys (including the RESET key), 4 programmable hot keys that are configured by default: two (2) keys to open and close the CB, and two (2) keys to block and unblock the recloser with their associated two (2) configurable control LEDs. Besides, there are six (6) programmable alarm LEDs.
- Zone selection interlocking - ZSI (68 function) is available through configurable inputs and outputs thanks to the programmable logic (PGC).
- In case a CB is manually closed, a switch on to an existing fault may occur. This fault condition is critical if the overcurrent protection function does not clear the fault until the adjusted time delay is fi It is necessary, in those cases, to clear the fault quickly by means of the SOTF 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 Serial Port: IEC60870-5-103, Modbus RTU or DNP3.0 Serial (selectable by general settings).
- Rear Ethernet Port (RJ45): Modbus TCP/IP, DNP3.0 TCP/IP, IEC60870-5-104 or IEC61850 (selectable by general settings) + SNTP Protocol + Web Server.
- Rear FO-LC Port: Modbus TCP/IP, DNP3.0 TCP/IP, IEC60870-5-104 or IEC61850 (selectable by general settings) + SNTP Protocol + Web Server.
- Alarms panel is available.
- The SIL-A is provided with (depending on the model):
- 3 configurable inputs and 3 configurable outputs.
- 6 configurable inputs and 4 configurable outputs.
- 6 configurable inputs and 6 configurable outputs.
- 5 configurable inputs and 7 configurable outputs.
- 9 configurable inputs and 5 configurable outputs.
- SIL-A is fitted with the demand of current (LDP - Load Data Profiling) with the following characteristics:
- Number of records: 744.
- Circular recording mode.
- Sampling rate (interval): configurable through communications (1-60 min).
- SIL-A is provided with non-volatile RAM memory in order to store up to 2048 events and the disturbance fault recording (DFR), maintaining date & time thanks to its internal RTC (Real Time Clock). The configurable options are:
- 5 records in data and COMTRADE format (300 cycles each record): 1 to 8 pre-fault cycles + 292 to 299 post-fault cycles.
- 25 records in data and COMTRADE format (60 cycles each record): 1 to 8 pre-fault cycles + 52 to 59 post-fault cycles.
- 50 records in data and COMTRADE format (30 cycles each record): 1 to 8 pre-fault cycles + 22 to 29 post-fault cycles.
- 100 records in data and COMTRADE format (15 cycles each record): 1 to 8 pre-fault cycles + 7 to 14 post-fault cycles.
- Each oscillographic record contains 4 analogue channels and up to 96 configurable digital channels. 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).
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