GE 745 TRANSFORMER MANAGEMENT RELAY User Manual

3-14 745 Transformer Management Relay GE Power Management
3.2 TYPICAL WIRING 3 INSTALLATION
3
3.2.18 IRIG-B
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.
Figure 3–16: IRIG-B FUNCTION
3.2.19 DIELECTRIC STRENGTH TESTING
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.
Hazard may result if the product is not used for its intended purpose.
745 RELAY
IRIG-B(-)
RECEIVER
TO OTHER DEVICES
RG58/59 COAXIAL CABLE
GPS SATELLITE SYSTEM
GPS CONNECTION
OPTIONAL
IRIG-B(+)
B8
B9
+
-
814823A1.CDR
IRIG-B
TIME CODE
GENERATOR
(DC SHIFT OR
AMPLITUDE MODULATED
SIGNAL CAN BE USED)
NOTE
WARNING

GE 745 TRANSFORMER MANAGEMENT RELAY Specifications

General

Brand	GE
Model	745 TRANSFORMER MANAGEMENT RELAY
Category	Relays
Language	English