User`s manual

RX3i Power Sync and Measurement System 3
GFK-2748
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
“Error! Reference source not found.” and “PSM Status Flags” in GFK-2749
Calculations
ANSI 25 – Generator and Public Grid Synchronization
ANSI 27 – Under-voltage Protection
ANSI 32 – Reverse Power Protection
ANSI 46 – Negative 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
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.
For product standards, general operating sepcifications, and installation requirements, refer to the PACSystems RX3i Power
Sync and Measurement System User’s Manual, GFK-2749.
Installation in Hazardous Areas
 WARNING - EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY
FOR CLASS I, DIVISION 2 or Zone 2;
 WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN
SWITCHED OFF OR THE AREA IS KNOWN TO BE NONHAZARDOUS.
 This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D, Zone 2, or non-hazardous
locations only.