Condition Indicators; Alarm; Pickup; Phase A (B/C) - GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual

4.2 DISPLAY, INDICATORS, AND FRONT PORT
4
e) GROUND
The GROUND indicator is on when ground is involved in the condition detected by any element that has picked
up, operated, or is now in a latched state waiting to be reset.
Use the front panel program port for RS232 communications with the 745. As described in Section 3.2.17:
RS232 FRONT PANEL PROGRAM PORT on page 3–13, all that is required is a connection between the relay
and a computer running the 745PC software. For continuous monitoring of multiple relays, either the COM1
RS485/RS422 port or the COM2 RS485 port should be used.
4-4
a) TRIP
The TRIP indicator is on when any output relay selected to be of the Trip type has
operated.
b) ALARM
The ALARM indicator is on when any output relay selected to be of the Alarm type
has operated.
c) PICKUP
The PICKUP indicator is on when any element has picked up. With this indicator on,
the front panel display is sequentially displaying information about each element that
has picked up.
d) PHASE A (B/C)
The PHASE A (B/C) indicator is on when phase A (B/C) is involved in the condition
detected by any element that has picked up, operated, or is now in a latched state
waiting to be reset.
Figure 4–2: PROGRAM PORT
745 Transformer Management Relay
4 FRONT PANEL OPERATION

4.2.5 CONDITION INDICATORS

4.2.6 PROGRAM PORT

GE Power Management