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Triggers
Oscillography
Sequence of Events
Operation
There are a total of 4 Event Monitors in CBEMA (Computer Business Equipment
Manufacturers Association). Each CBEMA event monitor has a different minimum
duration limit: Event 1, 1 – 60 cycles; Event 2, 1 – 120 cycles; Event 3, 60 – 60000 cycles
and Event 4, 1 – 60 cycles. When Pickup is set to less than 100% it operates as a sag (under
voltage) function, and when it is greater than 100% it operates as a swell (over voltage)
function. Sags and swells can be accurately detected from 90 to 180 Vac.
The following rules need to be followed when setting up CBEMA Setpoints:
• The Dropout should always be greater than Pickup in the Sag case
• The Dropout should be fixed to 100% in the Swell case
• The Pickup cannot be 100%
If any of the above rules are violated, an ERROR message will scroll across the
When the load voltage is sagging or swelling greater than the pickup setting, then a pickup
status will be set after the set minimum duration, in addition to incrementing the counter.
When the load voltage is back to the dropout level, the status is cleared. Any or all of the
Event Pickup statuses can be used to trigger Sequence of Events and/or Oscillography.
The CBEMA counters are cleared after it reaches 10,000 counts, or it can also be cleared
through the TCC600® Communication Software or the HMI.
Each of the CBEMA Events has a Binary Input DNP point associated with it that will
indicate the status of the event, as well as an Analog Input that will indicate the duration
in cycles of the most recent event.
6.6.2 Setting up CBEMA from the HMI
Setting CBEMA Normal Voltage, enabling Event 1, and entering Event 1 parameters are
described in this procedure. Enabling Events 2, 3 and 4 and entering their respective
settings is similar.
1. Press the Down Arrow (CNFG Hot Button) pushbutton to wake the unit. The menu
will advance to "CONFIGURATION".
2. Press the Down Arrow pushbutton once. The unit will display the following:
Tapchanger Type
3. Press the Right or Left Arrow pushbuttons, as necessary until the "CBEMA Setup"
screen is displayed.
Section 6
1VAC388793-MB A
Configuration
484 TCC300
User Manual