8.6 Configuring Schulz-Laios Settings
87
7. For Postfault Time, of recorded data after the trigger becomes Inactive (non-triggered mode),
select values from 0 to 65535 seconds.
8. Click the Data Items tab to select the type of data logged once an event is triggered. Items
change with each type of data selected under “Logging Parameters.” See Figure 8.7.
Figure 8.7: Configure Data Items Screen
9. Click on any data type and right-click to increase selection capability. Click OK to install
new values and close.
NOTE:
Multiple triggers in one channel are “OR’ed.”
For example, if selecting two triggers
for Channel 1, it will record an event if one or both triggers become Active. This is true for all
triggers, User or System Triggers.
8.6
Configuring Schulz-Laios Settings
The 1133A includes special logic to implement Schulz-Laios settings, which are designed to detect
power system anomalies such as oscillatory transients. Six channels are dedicated to performing
this function in the 1133A.
For technical details concerning Schulz-Laios Settings in the 1133A, see “Detecting Oscillatory
Transients and Other Anomalies” in Section 11.28.
1. Select Schulz-Laios in the left panel to access those settings. Select Input Signal for the
specific channel number to define the signal measured by Schulz-Laios logic.
2. Select the Input Channel column to define the selection (e.g. A-phase voltage).
3. Select the Reset Threshold column and type in the desired value.
4. Select the T1 filter time constant and type in the desired value. For additional information,
see Table 11.4.
5. Select the T2 oscillator-detector time constant and type in the desired value.
6. Repeat the steps 1
−
5 for any of the other channels you wish to set.
7. Click Apply to install these values in the 1133A, and then OK to close.
NOTE:
Changing any of the trigger parameters will cause the event partition of flash memory
to be erased.
