EES – Presentation PDF: Earthing and Grounding Safety of Electrical Energetic Systems

EES: Earthing and Grounding Safety in Electrical Energetic Systems (ADK: D-5/922) – Presentation PDF on 130 + pages Assuring of safety conditions and protection against electrical shock during faults, transients and lightning strikes in surrounding of energetic buildings, substations, transmission lines, antenna towers, industrial buildings etc. Above 15 measuring methods for testing ground resistance, evaluating step, touch and contact voltages, field of potentials and many more.

Material language: English.

Descripción

Practical Knowledge with Measuring Methods and Procedures

Inspections, Tests & Measurements

Visual inspection
Fault conditions and worst case situations for permissible touch voltage evaluation:
- Line to ground case situations on LV or MV side
- Lightning and switching maneuver situations
- Automatic tripout adjustment and short-circuit currents
Continuity and equalization testing
Earthing and grounding measuring methods:
- Earth resistance measurement 2/3/4 wire test method
- Voltage funel analzsing
- Ground potential rising measurement
- Step & contact voltage measurement
- Resistivity and specific earth resistance by Wenner / Schlumberger method
- Two clamps method for conductive loops measurement
- One clamp method with hi current for ground integrity
- dR 300A hi current for ground integrity and lightning system testing of power installations above 1 kV
- One clamp / four clamps testing of separate earthings of pylons & metal constructions & multileg groundings
- Sweep frequency and hi frequency 15 kHz / 25 kHz measuring methods
- Lightning strike pulse 10/350 simulation testing

Evaluation of Results

Find the PASS / FAIL / LIMIT values
Compare results to the limit
Bring the decision

Acts and Inform Appropriately

Report the results
Mark the equipment accordingly
Enabling of further use when PASS
Rejecting the usage when FAIL
Inform and transfer the responsibility

Troubleshooting and Maintenance

Work close to energized objects
Hi voltage presence checking
Leakage current
Earth bonding and main protection evaluation
Find faults and potential dangerous