Feeder Performance Testing Safety

High-voltage asset owners bear the responsibility for ensuring the reliability and safe operation of their assets, highlighting the critical importance of commissioning and maintenance testing. Current injection testing, utilising a high voltage (HV) line, stands out as one of the most comprehensive methods for assessing the earthing system of HV assets. It provides valuable insights into the condition and effectiveness of the earthing system, identifying any potential shortcomings.

However, this testing method carries significant risks. If safety protocols are disregarded or incorrect equipment is used, it can result in fatalities. Several hazards may arise during current injection testing over a feeder, including induced voltages on the HV line under test from parallel energised lines or transient induction from lightning strikes.

Ensuring the safety of personnel conducting these tests is paramount. This involves not only preventing accidents but also instilling confidence in their security during testing. It’s crucial to protect equipment to maintain test accuracy while assessing the earth system’s performance.

This presentation aims to clearly explain the hazards associated with feeder current injection testing and outline effective mitigation strategies. Comprehensive safety protocols, including thorough risk assessments, proper equipment usage, and adherence to industry standards, are essential components of ensuring the safety and reliability of these procedures.