Irig-B - GE T60 Instruction Manual

3 HARDWARE 3.2 WIRING

3.2.10 IRIG-B

IRIG-B is a standard time code format that allows stamping of events to be synchronized among connected devices. The
IRIG-B code allows time accuracies of up to 100 ns. Using the IRIG-B input, the T60 operates an internal oscillator with 1
µs resolution and accuracy. The IRIG time code formats are serial, width-modulated codes that can be either DC level
shifted or amplitude modulated (AM). Third party equipment is available for generating the IRIG-B signal; this equipment
can use a GPS satellite system to obtain the time reference so that devices at different geographic locations can be syn-
chronized.
3
Figure 3–25: OPTIONS FOR THE IRIG-B CONNECTION
Using an amplitude modulated receiver causes errors up to 1 ms in event time-stamping.
NOTE
GE Multilin T60 Transformer Protection System 3-25