Earth fault and overload protection relay FANOX SIA- Standard CTs

Earth fault and overload protection relay

FANOX SIA- Standard CTs

The SIA-B is an OC&EF protection relay with options for self-powered and dual-powered (self-powering + auxiliary power).
The relay is self-powered using the operating current through three /1 (<2VA) standard current transformers fitted on the lines. These transformers are also used to obtain current measurements. Besides, SIA-B can be used with an auxiliary power supply (24-230Vac/dc). The relay can also be supplied by a USB cable connected to the laptop or with a standard power bank.
An internal commissioning battery is included as optional (Lithium battery: 20 years lifetime).
Metallic box with high electromagnetic compatibility level (EMC) and wide range of operating temperature.
Really low start-up levels in self-powered mode: 75 mA in a three-phase system /160 mA in a single-phase system.
Test menu allows the trip circuit to be tested before the transformation centre is powered up.
There are 4 configurable LEDs. When the relay is switched off, its previous states can be checked by powering it up (by self-powering it through a USB cable, auxiliary voltage, or pressing the commissioning battery).
Self-diagnosis of the relay status (WATCHDOG) through the configurable LEDs and outputs.
Low power consumption.
To allow communication, relays are provided with a local micro USB front port and an optional remote communication RS485 port (Modbus RTU or DNP3.0 protocol, selectable by general settings) on the rear side.
The SIA-B is provided with a trip output for the low-power coil (24 Vdc—135 mJ), 3 conﬁgurable inputs, and 3 configurable outputs.
The SIA-B is fitted with the demand of current (Load Data Profiling) with the following characteristics:
Number of records: 168
Recording mode circular
Sampling rate (interval): configurable through communications 1-60 min
The SIA-B is provided with non-volatile RAM memory in order to store up to 1.024 events and disturbance fault recording (DFR-20 fault reports and 10 oscillographic records in COMTRADE format), maintaining date & time thanks to its internal RTC (Real Time Clock) even without power supply.
Each oscillographic record contains 4 analogue channels and up to 32 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).
The installation and subsequent maintenance of external batteries is eliminated. The operating costs of the centre are reduced.
SIA-B's compact size makes it easy to install, and its lightweight helps the customer save on transport costs.