Fault statistic suggests that earth faults are dominating fault type. Therefore, earth fault protection is of great importance in electrical networks. The type of the used earth fault protection depends primarily on the type of the earthing method. This course describes protection principles for solidly (effectively), reactance, high resistance and resonance grounded electrical systems. This course is suitable for electrical engineers and technicians with a desire to understand the fundamentals of earth fault protection. Presented details cover issues related to ground protection technical implementation. Upon successful completion engineers will be able to address key earth fault protection concepts, terms and schemes. Learning Objectives Specific Knowledge or Skill Obtained

• Solidly earthed system fault protection
• Restricted earth fault protection (REF)
• Directional comparison schemes
• Current reversal
• Reactance earthed system fault protection
• High resistance earthed system fault protection
• Resonance earthed system fault protection