GE PACSystems RX3i User Manual page 12

1
1-6
Terminal Assembly Input Terminal Ratings
Current
Voltage
Sync Relay contacts
RX3i CPU Memory Requirement for Automatic Data Exchange
%I
%Q
%AI
%AQ
Data Exchange Time Between RX3i CPU and PSM
A complete data exchange between the PSM and RX3i occurs during each controller scan.
Minimum scan time is 3.5ms per PSM module in the backplane. Minimum data update rate is one
power line period. See "System Operation" on page 1-7 and "PSM Status Flags" in chapter 3.
ANSI Protective Functions
ANSI 25 – Generator and Public Grid Synchronization
ANSI 27 – Under-voltage Protection
ANSI 32 – Reverse Power Protection
ANSI 47 – Voltage Phase Sequence Protection
ANSI 50 – Instantaneous Over-current Protection
ANSI 59 – Over-voltage Protection
ANSI 60 – Voltage (Current) Imbalance Protection
ANSI 81U – Under-frequency Protection
ANSI 81O – Over-frequency Protection
Power Measurement Configurations
Four-wire three phase wye systems: 3 PTs and 3 CTs plus Neutral CT (optional)
Three-wire three phase delta systems: 2 PTs and 2 CTs
Three independent single phase systems: 1 PT and 1 CT for each phase
Three-wire single phase systems: 120/240 (2 PTs and 2 CTs)
Operating Environment
Enclosure mounting
PACSystems* RX3i Power Sync and Measurement System – February 2013
15 Amps continuous maximum
690 VAC RMS
150 VAC/VDC at 1 Amp Resistive, maximum
Note: Actual contact ratings depend on load type.
See "Sync Relay contacts" on page 1-5.
80 bits
32 bits
64 words
2 words
Required. PSM module and Terminal Assembly must be
installed in a NEMA/UL Type 1 enclosure or an IP20
rating providing at least a pollution
degree 2 environment.
When this system is installed in an area designated as
Class 1 Zone 2 in Europe, compliance with the ATEX
Directive requires an enclosure with a minimum rating
of IP54.
GFK-2749