SEL-701-1 Monitor
Date Code 20011009
Event Analysis
Example Sequential Events Recorder (SER) Report
8.18
Table 8.7
Example Sequential Events
Recorder (SER) Event Report Explanations
Item #
Explanation
13, 12, 11, 10, 9, 8 After a 10-second accelerating time, the motor relay indicates
the motor is running (11). Later, the current unbalance alarm
element (46UBA, aliased as UNBALNC_I_ALARM) times
out, causing the relay to close output contact OUT1,
programmed to indicate protection element alarms (9, 8).
7, 6
The current unbalance trip element (46UBT, aliased as
UNBALNC_I_TRIP) times out, causing the relay to trip.
Since now both ouput contact OUT1 and TRIP are asserted,
the relay places a 'b' in the T1 output column of the event
report.
5, 4, 3
Declining current due to the opening contactor allows the
unbalance detecting overcurrent elements to drop out and the
relay deasserts output contact OUT1.
2, 1
As the current continues to drop, the relay declares the motor
stopped.
Содержание SEL-701-1
Страница 16: ...This page intentionally left blank ...
Страница 18: ...This page intentionally left blank ...
Страница 20: ...This page intentionally left blank ...
Страница 34: ...This page intentionally left blank ...
Страница 118: ...This page intentionally left blank ...
Страница 142: ...This page intentionally left blank ...
Страница 196: ...This page intentionally left blank ...
Страница 210: ...This page intentionally left blank ...
Страница 242: ...This page intentionally left blank ...
Страница 384: ...This page intentionally left blank ...
Страница 440: ...This page intentionally left blank ...
Страница 452: ...This page intentionally left blank ...