FANOX SIL-D00, User Manual, Page: 15 / 226

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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 SIL
family of products to carry out this function.
The SIL- D relay is designed to protect the secondary transformation and distribution centres of
electricity grids, using current functions. It is thought to work with a circuit breaker as element to
cut the power.
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
centres, as well as allowing it to operate properly under adverse conditions.
3.2. Description
Power is supplied with an auxiliary voltage of 24-220 Vdc/48-230Vac.
Apart from the phase and neutral instantaneous overcurrent, and protection against phase
inverse time overcurrent, the relay provides directional neutral overcurrent and directional
isolated neutral overcurrent as well as circuit breaker failure supervision, neutral overvoltage and
trip block for switch disconnector.
A recloser is fitted. This automated control shall permit closure (up to five attempts) with the
possibility of programming each reclosing time. It can be blocked by various means, from the
keyboard with a separate key, to the remote communications.
Further functions have been included, such as the cold load pickup, or the trip circuit supervision.
All models include a circuit breaker management block, which monitors the state of the circuit
breaker, the number of openings and the accumulated amps. It generates an indication if these
are excessive, it determines whether or not an Opening fault has occurred and allows the circuit
breaker close and open commands from the HMI, with different keys, and via the
communications port (either locally or remotely).
The SIL-D equipment has 6 inputs and 4 outputs that can be set by the user:
The SIL-D equipment is housed in a metal box with galvanic isolation on all of its measurement
or digital 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 interference. 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 equipment status, the current measurements in the primary winding
and the events or incidents associated with the equipment to be seen, and adjustments to be
made to the protection criteria. Depending on the model, these events can be saved in a non-
volatile memory to keep them when there is no power.