7PG21 Solkor Rf Description of Operation
1 General
Solkor R & Rf are well established Pilot Wire Current Differential Protection for use with privately owned 2 core
pilots with relatively high core resistance.
Solkor R/Rf protection benefits from the following main features:
• High transient stability
• High speed operation
• Low phase and earth fault settings
• Little or no variation of settings with pilot length
• In zone bleed off of up to 20% of rated load
• Easy to install, commission and maintain
• 15kV pilot isolation option
• Easily reconnected as either Solkor Rf or Solkor R
• Pilot Supervision schemes available
• Remote end injection intertripping via pilot cores available
©2011 Siemens Protection Devices Limited Chapter 1 Page 3 of 13
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