Basler Electric BE1-BPR - Manual (Page 70)

4-18 BE1-BPR Functional Description 9272000990 Rev J
LF Fault detector logic HMI Menu Branch: N/A
Parameter Parameter Selections Defaults
type PI (phase overcurrent)
NI (neutral overcurrent)
LF1=PI,1
LF2=NI,1
LF3=PI,2
filter 1 (1cycle RMS filter)
2 (moving average filter)
3 (1 cycle RMS 3-phase filter
LF Command
Purpose:
Read or change the fault detector logic of the active logic scheme.
Syntax: LF[x][=<type>,<filter>]
Comments: An access area one password is required to change settings.
LF Command Examples:
1. Program fault detector 1 as a phase overcurrent fault detector using digital filter 1.
LF1=PI,1
2. Program fault detector 2 as a neutral overcurrent fault detector using digital filter 1.
LF2=NI,1
3. Program fault detector 3 as a phase overcurrent pickup using the moving average filter (filter 2).
LF3=PI,2
The PU command sets the trip value of each fault detector and the moving average filter cycles for type 2
fault detectors.
CAUTION
A pickup setting range check is made each time logic settings are changed that
affect the fault detector pickup settings. For example, if PU1=5.00 and LF1
setting is changed from PI,1 to PI,2, the PU1 setting will automatically change
from 5.00 to 1.00 (the maximum allowable setting for a Type 2 fault detector on a
5 A unit). This kind of pickup setting adjustment can also occur if the active relay
logic is replaced with logic that has different LF settings.