FANOX SIA-C User Manual

Also see for SIA-C: User manual

Contents

www.fanox.com Rev. 26 52/1883. DESCRIPTION3.1. IntroductionWorldwide, the energy sector is currently undergoing a profound change as a result of highlevels of energy demand; more distribution lines and advanced supervision systems arerequired. Given the need for creating intelligent infrastructure, FANOX has developed the SIAfamily of products to carry out this function.The family of SIA relays is designed to protect the secondary transformation and distributioncentres of electricity grids. Protection features include protection against instantaneous andinverse 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 thecommunications links to the SIcom program, allowing for precise coordination with otherequipment.One of the most significant features of the SIA-C is that it eliminates the need for maintenance,as it uses the operating current to power itself. Additional benefits include that all of the modelshave been designed to be supplied from an external battery. This is aimed at facilitating eventmanagement and the commissioning of centres, as well as allowing it to operate properly underadverse conditions.3.2. DescriptionThe SIA-C equipment is a protection relay designed for secondary distribution. One of its maincharacteristics is the ability to power itself by using the cell current. Standard 5A or 1A secondarycurrent transformers are used for this, which allow self power withlower levels of current.The equipment is operative with 0.2 times the secondary rated single-phase current and with 0.1 times the secondary rated three-phasecurrent; in other words, the equipment powers itself with 1 A ofsingle-phase current and with 0.5 A of three-phase current with theSIA-C5* models, and the equipment powers itself with 200 mA ofsingle-phase current and with 100 mA of three-phase current with theSIA-C1* models. It is important to consider that, despite of the devicestarts up with those values and trip output is activated in thosevalues, to activate the other optional outputs (phase trip and neutraltrip) it is needed a minimum of 0.350 times the secondary ratedsingle-phase current and a minimum of 0.170 times the secondaryrated three-phase current.