GE 339 Instruction Manual page 116

A4 TARGET MESSAGES
4–38
• The Breaker Open and Breaker Close messages will appear on the display and stay for
5 seconds only, unless the reset command is initiated, or the element changes its
state. For example, if the breaker is detected "Open", the message "Breaker Open OK"
will appear on the display and will stay for 5 seconds, unless the breaker status
changes to "Close". If the breaker status changes to "Close" within 5 seconds after the
breaker has been detected open, the message "Breaker Open OK" will disappear, and
the message "Breaker Close OK" will appear and stay for 5 seconds.
• The Contact Input ON/OFF, Virtual Input ON/OFF, and Remote Input ON/OFF messages
will not appear as target messages upon change of state. The state change, however,
will be logged in the Event recorder.
Examples of how the messages appear on the display:
Example 1:
Short Circuit Settings:
• SHORT CIRCUIT FUNCTION = Trip
• SHORT CIRCUIT PICKUP = 1.00 x CT
• SHORT CIRCUIT DELAY = 0.20 s
When current greater than the SHORT CIRCUIT pickup level is applied, the 350 display
shows the following target message:
A4 TARGET MESSAGES
Short Circuit Trip
STATE: PKP
After the 200 ms time delay expires, the display shows the following message only:
A4 TARGET MESSAGES
Short Circuit Trip
STATE: OP
Example 2:
Phase Short Circuit Settings:
• SHORT CIRCUIT FUNCTION = Latched Alarm
• SHORT CIRCUIT PICKUP = 1.00 x CT
• SHORT CIRCUIT DELAY = 0.20 s
When current greater than the Short Circuit pickup level is applied, the display shows the
following target message:
A4 TARGET MESSAGES
Ph Short Circuit Alarm
STATE: PKP
After the 200 ms time delay expires, the display shows the following message only:
A4 TARGET MESSAGES
Ph Short Circuit Alarm
STATE: OP
Example 3:
Phase Short Circuit Settings:
• SHORT CIRCUIT FUNCTION = Alarm
• SHORT CIRCUIT PICKUP = 1.00 x CT
• SHORT CIRCUIT DELAY = 0.20 s
When current greater than the Short Circuit pickup level is applied, the display shows the
following target message:
A4 TARGET MESSAGES
Ph Short Circuit Alarm
STATE: PKP
CHAPTER 4: ACTUAL VALUES
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL