Connection settings for current differential, Figure 270), N table 114 – Basler Electric BE1-11g User Manual
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BESTCOMSPlus Navigation Path: Settings Explorer, System Parameters, Transformer Setup
HMI Navigation Path: Settings Explorer, System Parameters, Transformer Setup
Figure 270. Transformer Setup Screen
Table 114. Transformer Settings
Setting
Range
Increment
Unit
Default
Tap Calculation Mode
Manual or Automatic
n/a
n/a
Manual
MVA Rating
0.5 to 10,000
0.1
n/a
0.5
kV Rating
0.01 to 1,000
n/a
n/a
n/a
Tap
2 to 20 (5A CTs) or 0.4 to 4 (1A CTs)
0.01
n/a
2.00
CT Connection
Set on the Sensing Transformers screen
n/a
n/a
n/a
Phase CT Ratio
Set on the Sensing Transformers screen
n/a
n/a
n/a
Transformer Connection
WYE, DAB, DAC, ZAB, ZAC, NA
n/a
n/a
WYE
Ground Connection
Yes or No
n/a
n/a
No
Differential Circuit
Primary, Secondary, or None
n/a
n/a
Primary
Polarity
Yes or No
n/a
n/a
No
Phase Relationship
A, B, or C
n/a
n/a
A
Connection Settings for Current Differential
When the zone of protection includes a transformer, it may be necessary to provide phase angle and zero
sequence compensation to the currents used by the Phase Current Differential Protection (87) element.
See Figure 271 and Figure 272. For each input circuit, a setting is provided to enter the transformer
connections associated with that input.
Configuration
BE1-11g