CHAPTER 2: INSTALLATION
ELECTRICAL INSTALLATION
345 TRANSFORMER PROTECTION SYSTEM – QUICKSTART GUIDE
35
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 345 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.
Figure 2-24: IRIG-B connection
GE MULTILIN
345 RELAY
IRIG-B(-)
RECEIVER
TO OTHER DEVICES
RG58/59 COAXIAL CABLE
GPS SATELLITE SYSTEM
GPS CONNECTION
OPTIONAL
IRIG-B(+)
F1
F2
+
–
897741A1.CDR
IRIG-B
TIME CODE
GENERATOR
(DC SHIFT OR
AMPLITUDE MODULATED
SIGNAL CAN BE USED)
