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NVA100X-D - Manual - 02 - 2016
GENERAL
Main features
Metallic case.
Backlight LCD graphic Display.
Sixteen LEDs that may be joined with matrix criteria to many and various functions.
RESET key to clear LED indications and latched output relays.
Sixteen or thirty-two free settable binary inputs.
Independently settable for start, trip, self-test and control eight, sixteen output relay. Each output
relay may be set with normally energized or normally de-energized operating mode and manual or
automatic reset (latched/no-latched).
Rear Ethernet communication port, with MODBUS TCP/IP® or IEC61850 protocol, with RJ45 (cop-
per wires) and FX (optical fi ber) connection.
Rear RS485 port, with ModBus protocol.
Ethernet front serial port (local communication for ThySetter).
IRIG-B syinchronizing input port (optional)
Real time clock with super capacitor.
The most signifi cant constructive features are:
Galvanically insulated input and output circuits (communication and binary circuits included).
Optimum fi ltering of input signals through combined use of analog and digital fi lters.
Traditional electromechanical-type fi nal output contacts with continuous monitoring of control coil
continuity.
Auxiliary supply comprising a switching-type voltage stabilizing circuit having a very wide working
range and a very small power dissipation
Nominal frequency: 50 or 60 Hz.
The most signifi cant operating features are:
Programming of operating modes and parameters by means of the front keys and alphanumeric
display, with a programming procedure based on carrying out guided selections and on explicit and
immediate signalling of the operations being performed, so that such procedure can be carried out
without coding tables or mnemonic informations.
The feature modifi cation operations do not interrupt the normal functions of the relay.
Impossibility of programming unacceptable parameter values, thanks to the automatic limitation of
top and bottom scale values for the relative setting ranges.
Currents are sampled 64 times per period and measured in the effective value (RMS) of the funda-
mental component using the DFT (Discrete Fourier Transform) algorithm and digital fi lters.
The fault recorder (SFR) runs continuously capturing in circular mode the last twenty events upon
trigger of binary input/output and/or element pickup (start-trip).
The event recorder (SER) runs continuously capturing in circular mode the last three hundred
events upon trigger of binary input/output.
Recording of the last setting changes (Logger).
Digital fault recorder (DFR) in COMTRADE format (oscillography).
All settings and data recordings (faults, events, meterings and oscillography records) are stored in
non-volatile memory and then are retained even when the auxiliary power supply goes down.
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