Chapter 3 – Hardware Design
2 HARDWARE ARCHITECTURE
The RPV311 is a multifunction processing unit and has an acquisition system with 16-bit A/D D converters
that provide an acquisition rate of 256 points-per-cycle synchronized by the IRIG-B signal.
It has a high processing capability, which allows the acquisition of up to 64 analog channels and 256 digital
channels divided in up to 8 acquisition modules connected by fiber-optic links. Additionally, it is able to detect
IEC 61850 GOOSE messages.
All the registers are stored in a SSD hard disk.
It allows communication through the electrical Ethernet ports and optionally has a double internal converter
for optical Ethernet interfaces.
Monitoring and configuration are performed through a web interface; also, it has a human-machine interface
on the front panel for displaying information. It has a MODBUS and DNP3 interface for SCADA integration.
The RA331 module allows data acquisition of up to 8 analog channels (voltage, current, or DC transducers)
and up to 32 digital channels. The RA332 module allows data acquisition of up to 16 analog channels
(voltage, current, or DC transducers) and up to 32 digital channels. Both modules use 16-bit A/D converters
providing an acquisition rate of 256 points-per-cycle.
The RA333 module allows data acquisition of high-speed analog channels (voltage) for one transmission
line. This module allows the scheme to obtain traveling wave records for fault locating. Additionally, the
RA333 module allows data acquisition of up to 8 analog channels (voltage, current, or DC transducers) and
up to 32 digital channels, using 16-bit A/D converters providing an acquisition rate of 256 points-per-cycle
Figure 2: RA333, RA332, RA333 and RPV311
2.1 PROCESSING CAPABILITY
The RPV311 has 8 link connections to communicate with RA33x acquisition units. As each acquisition unit
has different number of channels and functions, they require different levels of demand from the RPV311. In
order to respect the RPV311 processing capability the number of RA33x that can be connected to the
RPV311 obey the following rule:
The RPV311 can process 12 logical slots and each RA demands the following number of slots.
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