Rev.17
13/119
The device has a LCD with two lines and twenty columns and a membrane keyboard with six buttons.
These allow the display of the device state, the current measurements in the primary and the events or
incidents associated with the device, and adjustments to be made to the protection criteria. These
events are saved in a non-volatile memory to conserve them in case of power failures.
There are three configurable LED indicators on the front of the SIA-F device. By default, these indicate
if the device is ready (LED ON), if an alarm has happened (LED ALARM) or if a trip has happened
(LED TRIP). The device has storage for up to 200 events, allowing any recorded incidents to be
analyzed. All SIA-F models are equipped with a real-time clock (RTC).
Current measurements are performed using RMS values, with ±2% accuracy in a band of ± 20% when
compared with rated current and ±4% in the rest of the range. Standard 5 A and 1 A current
transformers (CTs) are used.
The device has two communication ports: a front port (connector mini USB type A) and a rear port
(RS485). The front port allows a PC to be connected, which can be used to monitor the device using
the SICom communications program (supplied by FANOX). Front port can be used to power the
device by using a USB cable which can be directly connected with PC. The rear port RS485 allows the
device to be integrated as part of a system (SCADA). The ModBus RTU protocol is used in both ports.
Setting-up a session allows four levels of access to be set up with passwords that can be configured
by the user.
The protection functions provided, easy-to-use interface, low amount of maintenance and simple
integration make the SIA-F a precise and practical solution for protecting both industrial and public
electrical grids and transformation and distribution substations. The protection offered by the SIA-F
against earth faults is sensitive enough to be used in electric systems where the earth fault current is
low. It can be set to 0.1 times the rated neutral current and, depending on the model, the rated neutral
current can go as low as 0.1 A.
Summary of Contents for SIA-F
Page 7: ...www fanox com Rev 17 7 119 2 DIMENSIONS AND CONNECTION DIAGRAMS 2 1 Frontal view...
Page 8: ...www fanox com Rev 17 8 119 2 2 Case dimensions The dimensions are in mm CUT OUT PATTERN...
Page 9: ...www fanox com Rev 17 9 119 2 3 Connection diagram 3 Phase CT and neutral CT Connection...
Page 10: ...www fanox com Rev 17 10 119 3 Phase CT and residual neutral Connection...
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Page 118: ...www fanox com Rev 17 118 119 NOTES...
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