Basler BE1-CDS220, Instruction Manual

Page: 86 / 476

4-20 Protection and Control BE1-CDS220
Table 4-9. Operating Settings for Neutral Differential
Setting Range Increment Unit of Measure Default
Minimum
Pickup
(minpu)
0 = Disabled
0.10-1.00
0.01 Times tap 0
Slope 15-60 1
% I operate vs.
restraint
20
50-999 ms 1 m Milliseconds
0.05 - 60 sec
0.1 for 0.1 - 9.9 s
1.0 for 10 - 60 s
Seconds Time Delay
0 - 3600 (60 Hz) or 0 - 2500 (50 Hz)
∗
Cycles
500
∗
Time delays less than 10 cycles can be entered to the nearest 0.1 cycles from the optional HMI. All time
delays can be entered to the nearest 0.01 cycles from the ASCII command interface. Time delays entered
in cycles are converted to milliseconds or seconds. Increment precision after conversion is limited to that
appropriate for each of those units of measure.
The 87ND neutral differential operational settings may be entered with BESTCOMS (Figure 4-17), or from
the optional front panel HMI from Screens 5.#.2.1, \PROT\SG#\87ND7\87ND, or from the ASCII
command interface using the S<g>-87ND command.
Figure 4-17. Percentage Differential Screen, 87ND/187ND Tab
Retrieving Neutral Differential Status from the Relay
The status of each logic variable can be determined from the ASCII command interface using the RG-
STAT command. See Section 6, Reporting and Alarm Functions, General Status Reporting, for more
information.