Phase Distance Through Power Transformers; Phase Distance Protection - GE G60 Instruction Manual
Generator protection system
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Also See for G60:
- Instruction manual (780 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (768 pages)
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CHAPTER 8: APPLICATION OF SETTINGS
8.3 Phase distance through power transformers
8.3.1 Phase distance protection
8.3.1.1 Description
Phase distance elements of the G60 can be set to respond to faults beyond any three-phase power transformer. The relay
guarantees accurate reach and targeting for any phase fault. Moreover, the current and voltage transformers can be
located independently on different sides of the transformer.
The following setting rules apply to this feature:
•
A given distance zone is terminated by location of the VTs, not the CTs
•
Consequently, the positive-sequence impedance of a transformer must be included in the reach setting only if the
transformer is located between the potential source and the intended reach point
G60 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 8-5: Application example FlexLogic
PHASE DISTANCE THROUGH POWER TRANSFORMERS
8
8-15
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