Specifications

December 2008 Page 14–9
Chapter 14. Protective Relay Interface (PRI/PRS) Module
14
the KEY1IN–KEY4IN or T1N–T4N
positions, as appropriate for each circuit, and
the output, or receive, wiring to the
TRIP1OUT–TRIP4OUT or T1OUT–T4OUT
positions.
The surge ground was redesigned to be isolated
from the chassis ground. A dedicated stranded
copper wire, 12awg or better, should be used to
attach the ground bus to the new ground stud.
(Braided wire is preferred).
5. Connect the module’s interface to the
FOCUS chassis.
After connecting all wires, attach the
module’s interface to the rear of the FOCUS
chassis so that it connects to the PRI Module.
14.3.2 Software Settings
Once you have completed the hardware installa-
tion and connections, you can configure the PRI
Module using the FOCUS Configuration Software
P2P1
11
TRIP1 OUT
KEY1 IN
TRIP3 OUT
KEY3 IN
TRIP2 OUT
KEY2 IN
TRIP4 OUT
KEY4 IN
GRD OUT
BLCK OUT
FOCUS
PRI Interface
GRD
Figure 14–8. PRI/PRS High Threshold Interface
with Enhanced Surge Immunity
PRI
P2P1
11
TRIP1 OUT
KEY1 IN
TRIP3 OUT
KEY3 IN
TRIP2 OUT
KEY2 IN
TRIP4 OUT
KEY4 IN
GRD OUT
BLCK OUT
Figure 14–7. PRI/PRS
Interface (Prior to June 2002)
Figure 14–9. PRI/PRS
Compression Type Interface