Installation In Hazardous Locations - GE PACSystems RX3i User Manual

RX3i Power Sync and Measurement System
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 3.5 ms per PSM module in the backplane. Minimum data update rate is one power line period.
Refer to GFK-2749, the sections, System Operation and PSM Status Flags.
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
For product standards, general operating sepcifications, and installation requirements, refer to GFK-2749, PACSystems RX3i
Power Sync and Measurement System User's Manual.

Installation in Hazardous Locations


The following information is for products bearing the UL marking for Hazardous Areas, or ATEX marking for explosive
atmospheres:
Class 1 Division 2 Groups ABCD
•
This equipment shall be installed in an ultimate enclosure suitable for the environment that is only accessible with the
use of a tool.
•
Suitable for use in Class I, Division 2, Groups A, B, C and D Hazardous Locations, or nonhazardous locations only.
EXPLOSION HAZARD - Substitution of components may impair suitability for class I, division 2.
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.
3
GFK-2748C