Gateway for short circuit indicators
The SICAM Fault Collector Gateway (FCG) device receives both the load current values and distribution line faults via the SICAM Fault Sensor Indicator (FSI). The received information status and events are transmitted to the control center based on the IEC 60870-5-104 protocol or to the Siemens FLiC service using the XMPP protocol. The fault detected by SICAM FSI is communicated to SICAM FCG via short-range radio (SRR) communication within a distance of 100 meters. SICAM FCG provides 6 binary inputs and 3 binary outputs. SICAM FCG can be configured and diagnosed locally using the Web GUI by connecting to a PC or laptop computer or remotely via General Packet Radio Service (GPRS). The SICAM FCG has a plastic housing and it is strongly recommended to mount it within a metal cabinet for additional protection. The Global System for Mobile Communications (GSM) and short-range radio antenna are mounted outside the metallic cabinet. SICAM FSI firmware and parameters can be updated from the SICAM FCG. SICAM FCG Web GUI allows you to configure the parameters, display error and event log, upgrade of firmware, and download the configuration.
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- On the terminal block L, all the 3 binary inputs are independent and have a fixed threshold of 8 V. On the terminal block P, 2 binary inputs have a common root (P8, P9, and P10), 1 binary input (P11, P12) is independent.
These binary inputs have selectable thresholds of DC 19 V, DC 88 V, or DC 176 V.
Therefore an optimal adjustment to the pickup voltage can be made in the case of increased interference level.
The binary outputs are designed as relay contacts. The terminal block P has 2 relay outputs Normally open (NO) and one relay output change over (CO). The relays can switch voltages up to AC/DC 250 V and currents up to AC/DC 5 A.
- SICAM FCG is a gateway device on the communication network between the SICAM FSIs and the control center. It provides interfaces and supports communication protocols to the SICAM FSIs (via short-range radio) and to the control center (via mobile networks). The gateway contains an interworking function for the communication exchanged between SICAM FSIs and the control center.
The various device communication interfaces and protocols are available for the communication between the SICAM FCG and the control center.
SICAM FCG has an Ethernet interface which supports the device parameterization and the monitoring.
The communication interface supports the device parameterization and the transmission of messages and measured values. The information is transmitted in telegrams in a secured way.
- The module supports 4 frequency bands: 850 MHz, 900 MHz, 1800 MHz, and 1900 MHz.
The communication to the control center can be executed based on the IEC 60870-5-104 via internet protocol security (IPSec) tunnel and GSM.
You can execute the configuration and local diagnostic remotely via GSM. The communication to the Siemens FLiC service is based on XMPP and GSM.
Short-Range Radio Module
- The short-range radio module communicates directly with SICAM FSI via a radio link in the license-free 2400-MHz band and up to 100 meters. Any overhead distribution line fault or other status change detected by SICAM FSI is communicated to the SICAM FCG through the short-range radio module.
In operation, the device needs the date and time for all time-relevant processes. This ensures a uniform time basis and a time stamp for the communication with peripheral devices. The following types of time synchronization are performed according to the parameterization:
- External time synchronization via Network Time Protocol (NTP) (recommended, see 7.3.1 time synchronization).
- Internal time synchronization via Real-Time Clock (RTC) (if there is no external time synchronization).
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