Irig-B; Dielectric Strength Testing - GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual

3.2 TYPICAL WIRING
IRIG-B is a standard time code format that allows 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 shifted or amplitude modulated (AM). 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.
3
GPS CONNECTION
OPTIONAL

IRIG-B

TIME CODE
GENERATOR
(DC SHIFT OR
AMPLITUDE MODULATED
SIGNAL CAN BE USED)
Dielectric strength test was performed on the 745 relay at the manufacturer. It is not necessary to perform this
test again at the customer site. However, if you wish to perform this test, follow instructions outlined in Section
10.3.2: DIELECTRIC STRENGTH TESTING on page 10–5.
No special ventilation requirements need to be observed during the installation of the unit.
The unit does not have to be cleaned.
NOTE
Hazard may result if the product is not used for its intended purpose.
WARNING
3-14
GPS SATELLITE SYSTEM
RG58/59 COAXIAL CABLE
+
-
TO OTHER DEVICES
Figure 3–16: IRIG-B FUNCTION
745 Transformer Management Relay
3 INSTALLATION
745 RELAY
B8 IRIG-B(+)
B9 IRIG-B(-)

3.2.19 DIELECTRIC STRENGTH TESTING

GE Power Management
3.2.18 IRIG-B
RECEIVER
814823A1.CDR