Basler Electric BE1-700 - Manual (Page 84)

Table 4-16. BESTlogic settings for Phase Undervoltage/Overvoltage Protection
Function Range/Purpose Default
Mode
0 = Disabled
0
1 = Undervoltage (27) or overvoltage (59) on one (or more) phases causes
pickup.
2 = Undervoltage (27) or overvoltage (59) on two (or more) phases causes
pickup.
3 = Undervoltage or overvoltage on all three phases causes pickup.
BLK Logic expression that disables function when TRUE. 0
Operating Settings for Phase Undervoltage/Overvoltage Protection
Operating settings for the 27P and 59P functions consist of pickup and time delay values. The pickup
value determines the level of voltage required for the element to start timing toward a trip. The time delay
value determines the length of time between pickup and trip. Time delays can be set in milliseconds,
seconds, or cycles. The default is milliseconds if no unit of measure is specified.
Operating settings are made using BESTCOMS. Figure 4-24 illustrates the BESTCOMS screen used to
select operational settings for the undervoltage elements. The 59P/159P overvoltage elements are set in
a similar manner. To open the screen, select Voltage Protection from the Screens pull-down menu and
select the 27P/127P or 59/159P tab. Alternately, settings may be made using the S<g>-27P and S<g>-
59P ASCII command or through the HMI using Screens 5.x.3.1 (27P) and 5.x.8.1 (59P), where x
represents 1 (Setting Group 0) or 2 (Setting Group 1).
Figure 4-24. Voltage Protection Screen, 27P/127P Tab
Beside the Logic pull-down menu is a pull-down menu labeled Settings. The Settings menu is used to
select the setting group that the elements settings apply to. The default unit of measure for the Pickup,
Alarm Threshold, and Inhibit settings is secondary volts. Primary volts (Pri Volts), per unit volts (Per U
Volts) and percent volts (% Volts) can also be selected as the Pickup setting unit of measure. The unit of
measure for the Time setting that represents the element's time delay defaults to milliseconds. It is also
selectable for seconds, minutes, and cycles.
Operating settings for Phase Undervoltage/Overvoltage Protection are summarized in Table 4-17.
4-28 BE1-700 Protection and Control 9376700990 Rev M