2–36 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
ELECTRICAL INSTALLATION CHAPTER 2: INSTALLATION
The uncovered communications cable shield connected to the common terminal should
not exceed 1” (2.5 cm) for proper EMC shielding of the communications cable.
IRIG-B
IRIG-B is a standard time code format that allows time stamping of events to be
synchronized among connected devices within 1 millisecond. The IRIG time code formats
are serial, width-modulated codes which can be either DC level shift or amplitude
modulated (AM) form. The type of form is auto-detected by the 350
relay. Third party
equipment is available for generating the IRIG-B signal; this equipment may use a GPS
satellite system to obtain the time reference so that devices at different geographic
locations can also be synchronized.
The uncovered communications cable shield connected to the common terminal should
not exceed 1” (2.5 cm) for proper EMC shielding of the communications cable.
Figure 2-41: IRIG-B connection
GE MULTILIN
3 SERIES RELAY
IRIG-B(-)
RECEIVER
TO OTHER DEVICES
RG58/59 COAXIAL CABLE
GPS SATELLITE SYSTEM
GPS CONNECTION
OPTIONAL
IRIG-B(+)
F1
F2
+
–
898741A3.CDR
IRIG-B
TIME CODE
GENERATOR
(DC SHIFT OR
AMPLITUDE MODULATED
SIGNAL CAN BE USED)
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