Transformer Setup - Basler BE1-11g Instruction Manual

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Transformer Setup

The BE1-11g requires information about the transformer windings to provide differential metering and
differential protection. See the Phase Current Differential (87) Protection chapter for more information.
Transformer setup is accomplished on the Sensing Transformers settings screen (Figure 284) in
BESTCOMSPlus. Setting ranges and defaults are summarized in Table 119.
BESTCOMSPlus Navigation Path: Settings Explorer, System Parameters, Transformer Setup
HMI Navigation Path: Settings Explorer, System Parameters, Transformer Setup
Setting
Tap Calculation Mode
MVA Rating
kV Rating
Tap
CT Connection
Phase CT Ratio
Transformer Connection
Ground Connection
Differential Circuit
Polarity
Phase Relationship
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 285 and Figure 286. For each input circuit, a setting is provided to enter the transformer
connections associated with that input.
Configuration
Figure 284. Transformer Setup Screen
Table 119. Transformer Settings
Range
Manual or Automatic
0.5 to 10,000
0.01 to 1,000
2 to 20 (5A CTs) or 0.4 to 4 (1A CTs)
Set on the Sensing Transformers screen
Set on the Sensing Transformers screen
WYE, DAB, DAC, ZAB, ZAC, NA
Yes or No
Primary, Secondary, or None
Yes or No
A, B, or C
9424200994 Rev U
Increment Unit Default
n/a n/a Manual
0.1 n/a
n/a n/a
0.01 n/a 2.00
n/a n/a
n/a n/a
n/a n/a WYE
n/a n/a
n/a n/a Primary
n/a n/a
n/a n/a
BE1-11g
0.5
n/a
n/a
n/a
No
No
A