Alstom Reason RPV311, Technical Manual

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RPV311 Chapter 4
– Configuration
RPV311-TM-EN-6 65
3.4 ACQUISITION WITH REMOTE ACQUISITION MODULES
The RPV311 data acquisition can be performed by the RA331, RA332 and RA333 remote acquisition
modules.
The RA333 module consists of two different acquisition systems. One, called DFR, is used for analog data
acquisition of 50/60 Hz of voltage, current, or DC. The other, called TW, is used for high-speed acquisition of
traveling waves. The RA333 (TW) and RA333 (DFR) are physically installed in the same module, but are
logically independent, i.e., the RPV311 will be treated as two logical modules.
The RA331, RA332 and RA333 (DFR) modules are independent and use 16-bit opto-isolated A/D converters
with simultaneous acquisition of all channels provided by the IRIG-B signal, thus ensuring that the frequency
acquisition is kept constant.
The analog channels for current measurement use internal shunts to minimize the effects of phase variation
caused by transformers.
There is a delay in the data transmission of the acquisition module for the processing module proportional to
the length of the fiber-optic cable. This delay is compensated by the RPV311 considering the information of
the fiber length specified in the configuration of the equipment.
The links should be installed of positions A to L. Intermediate empty positions are considered as "using" 8
analog channels.
Each link must be configured considering the module type and its inputs.
To configure the links, access the L
INKS
section, shown in Figure 12 .