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CHAPTER 2: INSTALLATION
IRIG-B
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
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-B 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 869 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 2-28: IRIG-B connection
ELECTRICAL INSTALLATION
2–27
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