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3.
DESCRIPTION
3.1.
Introduction
Worldwide, the energy sector is currently undergoing a profound change as a result of high levels of
energy demand; more distribution lines and advanced supervision systems are required. Given the
need for creating intelligent infrastructure, FANOX has developed the SIA family of products to carry
out this function.
The family of SIA relays is designed to protect the secondary transformation and distribution centers of
electricity grids. Protection features include protection against instantaneous and inverse time
overcurrent (for the phases and the neutral), and it also has external trip support (temperature,
pressure, etc.) depending on the characteristics of each model.
The protection functions can be enabled selectively by using both the front panel and the
communications links to the SICom program, allowing for precise coordination with other equipment.
Additional benefits include that all of the models have been designed to be supplied from an external
battery. This is aimed at facilitating event management and the commissioning of centers, as well as
allowing it to operate properly under adverse conditions.
3.2.
Description
The SIA-B equipment is a protection relay designed for secondary distribution. One of its main
characteristics is the necessity of using specific current transformers for measurement and power
supply.
The equipment starts-up from 0.8xIsmin single phase and
0.4xIsmin three phase current using specific CTs.
The SIA-B equipment is housed in a metal box with
galvanic isolation on all its measurement inputs and
outputs (with the exception of ports for communications
and battery power supply, as these are sporadic
connections). This allows the equipment to have the best
possible level of electromagnetic compatibility, both in
terms of emission of, and immunity from, radiated and
conducted interferences. These levels are the same as
those established for primary substations.
The equipment has an LCD with two lines and twenty
columns and a membrane keyboard with six buttons.
These allow the display of the equipment state, the current
measurements in the primary and the events or incidents
associated with the equipment, and adjustments to be
made to the protection criteria.
There are two LED indicators on the front of the SIA-B
equipment. These indicate if the equipment is On (LED ON) and if an alarm has happened (LED
ALARM). Depending on model, there is a possibility of having, apart from the LEDS, one bistable
indicator to signaling the trip of any of the protection functions. About signaling, there is a possibility of
selecting 2 signaling outputs configurable by the user.
The equipment has storage for up to 100 events, allowing any registered incidents to be analyzed.
RTC (Real Time Clock) is available for all SIA-B models.
To facilitate the analysis of events, it is fitted with 4 fault reports (24 events per fault report). Fault
reports start when any of the protection functions picks-up and it finishes when any of the mentioned
functions trips.
Summary of Contents for SIA-B
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