3-30
T60 Transformer Protection System
GE Multilin
3.2 WIRING
3 HARDWARE
3
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, pulse width-modulated codes that can be either DC
level shifted or amplitude modulated (AM). The GE MultiSync 100 1588 GPS Clock as well as third-party equipment are
available for generating the IRIG-B signal; this equipment can use a global positioning system (GPS) satellite system to
obtain the time reference so that devices at different geographic locations can be synchronized.
Figure 3–28: OPTIONS FOR THE IRIG-B CONNECTION
Using an amplitude modulated receiver causes errors up to 1 ms in event time-stamping.
The T60 is intended for use with external clocks that set the IRIG-B control bits according to IEEE Std C37.118.1-
2011. When used with a source that sets the IRIG-B control bits according to IEEE Std 1344-1995, the source must
have the sign of its local time offset setting reversed, and if daylight savings time (DST) is used, the source's DST
start and DST stop date settings must be interchanged.
UR-series device
BNC (in)
Receiver
RG58/59 coaxial cable
GPS satellite system
GPS connection
IRIG-B (–)
4A
+
827756A8.CDR
IRIG-B
time code generator
(DC-shift or
amplitude modulated
signal can be used)
4B IRIG-B (+)
UR-series device
BNC (in)
Receiver
Twisted-pair cable
GPS satellite system
GPS connection
IRIG-B (–)
4A
+
IRIG-B
time code generator
(DC-shift or
amplitude modulated
signal can be used)
4B IRIG-B (+)
NOTE
Summary of Contents for T60
Page 6: ...vi T60 Transformer Protection System GE Multilin TABLE OF CONTENTS ...
Page 14: ...xiv T60 Transformer Protection System GE Multilin TABLE OF CONTENTS ...
Page 34: ...1 20 T60 Transformer Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 490: ...5 344 T60 Transformer Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 522: ...6 32 T60 Transformer Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 536: ...7 14 T60 Transformer Protection System GE Multilin 7 1 COMMANDS 7 COMMANDS AND TARGETS 7 ...
Page 568: ...10 12 T60 Transformer Protection System GE Multilin 10 6 DISPOSAL 10 MAINTENANCE 10 ...
Page 596: ...A 28 T60 Transformer Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 716: ...B 120 T60 Transformer Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Page 762: ...E 10 T60 Transformer Protection System GE Multilin E 1 IEC 60870 5 104 PROTOCOL APPENDIX E E ...
Page 774: ...F 12 T60 Transformer Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...