Power system applications – Basler Electric BE1-11t User Manual
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Power System Applications
The following figures show examples of the applications that can be served by the Basler Electric BE1-11t
Transformer Protection System. Many of these applications can be used in concert with other Basler
numeric systems such as the BE1-851 Overcurrent Protection System, the BE1-11f Feeder Protection
System, the BE1-11g Generator Protection System, or any other member of the BE1-11 family of
protection systems.
Figure 173. Complete Transformer Protection for Step-Up Transformers
Notes for Figure 173:
1.
The neutral ground (IN) operates on internally calculated residual (3I0) current.
2.
4-wire connection shown is typical. See the
connections. The 4-wire connection provides negative- and zero-sequence voltage polarizing for
ground faults; 3-wire connection provides negative-sequence voltage polarizing.
3.
The polarity of metered watts and vars can be adjusted using BESTCOMSPlus
®.
4.
VTX can be connected A-N, B-N, C-N, or A-B, B-C, C-A. The BE1-11t has settings for matching
phase angle and voltage magnitude between VTX and VTP.
5.
Independent Ground Input (IG) connected to detect Low Side ground faults and Transformer
Ground Differential Protection.
BE1-11t
Power System Applications