Basler Electric DECS-400 - Manual (Page 64)

52 9369700990 Rev R
Data recording may be triggered by logic triggers, level triggers, or manually through BESTCOMS.
Logic triggers allow data recording to occur as a result of an internal or external status change of the
DECS-400.
Level triggering allows data record triggering based on the value of one of the internal variables. The
value can be a minimum or maximum value and it can be specified to trigger a record when the monitored
variable crosses a minimum threshold from above, or a maximum threshold from below. A minimum and
maximum threshold may also be selected for the monitored variable, causing the monitored value to
trigger a record when it rises above its maximum or decreases below its minimum.
A standard backup battery maintains real-time clock operation in the event that control power is lost.
Refer to the Maintenance chapter for instructions on replacing the battery.
Trending
The trend log records the activity of parameters over an extended period of time. Up to six parameters
from the following list can be selected for monitoring over a period ranging from one hour to 30 days.
•
Auxiliary Voltage Input
•
AVR PID Error Signal Input
•
Bus Frequency
•
Bus Voltage
•
Control Output
•
Cross Current Input
•
Field Current
•
Field Voltage
•
Frequency Response
•
Generator Average Current
•
Generator Average Voltage
•
Generator Frequency
•
Generator Ia
•
Generator Ib
•
Generator Ic
•
Generator kVA
•
Generator kvar
•
Generator kW
•
Generator Power Factor
•
Generator Vab
•
Generator Vbc
•
Generator Vca
•
Negative Sequence Current
•
Negative Sequence Voltage
•
Overexcitation Controller Output
•
PF Mode Output
•
Phase Angle Ia - Vca
•
Phase Angle Iaux - Vca
•
Phase Angle Ib - Vca
•
Phase Angle Ic - Vca
•
Phase Angle Vab
•
Phase Angle Vbc
•
PID Integrator State
•
Positive Sequence Current
•
Positive Sequence Voltage
•
PSS Electrical Power
•
PSS Filtered Mechanical Power
•
PSS Final Output
•
PSS Lead-Lag #1
•
PSS Lead-Lag #2
•
PSS Lead-Lag #3
•
PSS Lead-Lag #4
•
PSS Mechanical Power
•
PSS Mechanical Power LP #1
•
PSS Mechanical Power LP #2
•
PSS Mechanical Power LP #3
•
PSS Mechanical Power LP #4
•
PSS Post-Limit Output
•
PSS Power HP #1
•
PSS Pre-Limit Output
•
PSS Speed HP #1
•
PSS Synthesized Speed
•
PSS Terminal Voltage
•
PSS Torsional Filter #1
•
PSS Torsional Filter #2
•
PSS Washed Out Power
•
PSS Washed Out Speed
•
Stator Current Limiter Output
•
Terminal Frequency Deviation
•
Time Response
•
Underexcitation Controller Output
The trend log has a sampling rate of 1,200 data points per record.
Power System Stabilizer
The optional, integrated PSS is an IEEE type PSS2A, dual input, “integral of accelerating power” stabilizer
that provides supplementary damping for low-frequency, local-mode oscillations and power system
oscillations.
Functional Description DECS-400