NG TS 3.24.38
National Grid Technical Specifications - Overcurrent Protection
|Publication Date:||1 May 2000|
This Specification details the functional and performance requirements for overcurrent protection on the National Grid=s 400 kV, 275 kV and 132 kV systems. It covers phase connected overcurrent protection, residually connected earth fault protection and other applications using overcurrent functions.
Informative: The Overcurrent Protection function is generally applied as back-up protection.