Field Wiring - GE PACSystems RX3i User Manual

RX3i Power Sync and Measurement System

Field Wiring

Wiring to the PSM consists of:

the connection cable between the Terminal Assembly and the PSM

the leads to user-supplied potential and mandatory user-supplied current transformers

Sync relay output connections, and

frame ground connections from the Terminal Assembly to the chassis
No CT shorting bars are provided on the PSM Terminal Assembly; these must be supplied by the user.
Requirements for Terminal Assembly Connections
Terminal Assembly connections above 600 VAC require prepared wire ends, such as tinning of the conductors, or use of
crimpled or soldered forked connectors or ferrules.
Terminal connections for COM1, COM2, voltage sensing and current sensing terminals
Terminal torque: 1.81 Nm (16 in-lb)
Wiring size/type: 0.823 mm
Relay output terminal connections
Terminal torque: 0.8 Nm (7 in-lb)
Wiring size/type: 0.205 mm
For additional wiring and connectin information, refer to GFK-2749, PACSystems RX3i Power Sync and Measurement Module
User's Manual.
The PSM Terminal Assembly connects to hazardous voltages. Before installing, testing, or
troubleshooting this module, you should refer to the complete instructions in the PACSystems RX3i
Power Sync and Measurement Module User's Manual, GFK-2749. Failure to follow the published
guidelines may result in personal injury, equipment damage, or both.
Note: Although Grid 1 and Grid 2 are interchangeable, you should connect the most stable source to Grid 1. Between a
utility grid and a generator, the utility grid is the best choice for connection to the PSM Grid 1 inputs. This will yield the
most accuracy and the least reading-to-reading fluctuation.
Basic PSM System Connections
Sync
Contacts
Load(s)
2 2
– 5.26 mm (18–10 AWG) solid/stranded
2 2
– 0.410 mm
Grid 1 power system connections to
user PTs with fuses and CTs with
shorting bars
Grid 2 power system connections to
user PTs with fuses and CTs with
shorting bars
(24–21 AWG) solid/stranded
Interface cables
11
GFK-2748C