Table 9.3: Trigger Channel Parameter Summary (32 Channel)
Function
Range or Options
Input Signal
1-31, per Table A.2 above (set to 0 if not
used)
Channel
0-3, per right column in table above
Trigger Dependency
0-2, Off, Active, Inactive
Master Channel
0-31, any other trigger channel
Limit Type
0-3;
x > limit, x < limit,
|
x
|
> limit,
|
x
−
ref
|
< limit
Dwell (delay) time
0-65535, 50 ms/count; 0 to 3276.5 seconds
Limit Value
Floating Pt, in measurement units (volts,
watts, . . . )
Reference Value
Floating Pt, in measurement units (volts,
watts, . . . )
Table 9.4: Schulz-Laios Transient Detector Algorithm Control
(6 Channel)[1]
Function
Range or Options
T1
High-pass (rate detector) time constant, sec-
onds Minimum 0.05 seconds, typical 0.5 sec-
onds
T2
Oscillatory detector low-pass time constant,
seconds Minimum 0.05 seconds, typical 5.0
seconds
Oscillatory detector
Reset threshold
Threshold in measurement units. Set to any
negative number to disable reset
Input Signal
0-31, per Table A.2
Channel
0-3, per right column in Table A.2
[1] Schulz, Richard P. and Beverly B. Laios,
Triggering Trade offs for Recording
Dynamics
,
IEEE Computer Applications in Power
; April 1997, pp. 44ff
[2] Hauer, John F., and Fazlollah Vakili,
An Oscillation Detector Used in the BPA
Power System Disturbance Monitor
,
IEEE Transactions on Power Systems
, Vol.
5 No. 1, Feb. 1990, pp. 74ff
144
