Ge 489 User Manual download pdf (Page 158)

5-26 489 Generator Management Relay GE Multilin

5.8 DIAGNOSTICS 5 ACTUAL VALUES

5.8DIAGNOSTICS 5.8.1 DIAGNOSTIC MESSAGES

In the event of a trip or alarm, some of the actual value messages are very helpful in diagnosing the cause of the condition.

The 489 will automatically default to the most important message. The hierarchy is trip and pretrip messages, then alarm

messages. In order to simplify things for the operator, the Message LED (indicator) will flash prompting the operator to

press the key. When the key is pressed, the 489 will automatically display the next relevant message and

continue to cycle through the messages with each keypress. When all of these conditions have cleared, the 489 will revert

back to the normal default messages.

Any time the 489 is not displaying the default messages because other actual value or setpoint messages are being viewed

and there are no trips or alarms, the Message LED (indicator) will be on solid. From any point in the message structure,

pressing the key will cause the 489 to revert back to the normal default messages. When normal default messages

are being displayed, pressing the key will cause the 489 to display the next default message immediately.

EXAMPLE:

If a thermal model trip occurred, an RTD alarm may also occur as a result of the overload. The 489 would automatically

default to the

CAUSE OF LAST TRIP message at the top of the A1 STATUS ÖØ LAST TRIP DATA queue and the Message LED

would flash. Pressing the key cycles through the time and date stamp information as well as all of the pre-trip data.

When the bottom of this queue is reached, an additional press of the key would normally return to the top of the

queue. However, because there is an alarm active, the display will skip to the alarm message at the top of the

A1 STATUS

ÖØ ALARM STATUS queue. Finally, another press of the key will cause the 489 to return to the original CAUSE OF

LAST TRIP message, and the cycle could be repeated.

When the has been pressed and the hot RTD condition is no longer present, the display will revert back to the nor-

mal default messages.

LAST TRIP DATA:

CAUSE OF LAST TRIP:

Overload

TIME OF LAST TRIP:

12:00:00.0

DATE OF LAST TRIP

Jan 01 1992

↓

ANALOG INPUT 4

PreTrip: 0 Units

ACTIVE ALARMS:

STATOR RTD #1

ALARM: 135°C

START BLOCK

LOCKOUTS:

OVERLOAD LOCKOUT

BLOCK: 25 min

NEXT NEXT

RESET

1 2 ... 153 154 155 156 157 158 159 160 161 162 163 ... 258 259

Comments to this Manuals

No comments

Ge 489 User Manual Page 158

Comments to this Manuals

Related products and manuals for Generators Ge 489