EEA – Presentation PDF: Electrical Energetics Grid Impedances, Short Circuit Currents and Automatic Trip-Out Ability

EEA: Electrical Energetics Grid Impedances, Short Circuit Currents and Automatic Trip-Out Ability (ADK: D-5/909) – Presentation PDF on 40 + pages The acquired knowledge on assuring of safety conditions and protection against electrical shock by evaluating of automatic tripout ability and tripout time. Grid Z impedances, Ipsc and Ipfc with HOT factors used in calculations to protect transformers and built-in equipment in case of overheating. Several procedures and measuring methods are explained for maintenance in safe manner when work energized.

Material language: English.

Description

Practical Knowledge with Measuring Methods and Procedures

Inspections, Tests & Measurements

Visual inspection
Automatic tripout ability
Continuity and equalization testing
dR High-Current earth bonding testing
Ground integrity with High-Current method
Partial grounding by additional flex clamp method
Partial impedances of joints on live lines
Short-circuit current avilable
Short-circuit current minimum and hot factor evaluated
Short-circuit current maximum
Fault / contact / touch voltage evaluated
Z / Isc / Fuse protection evaluation
ELR relay tripout testing
Insulation resistance measurement
Functional checking
Power quality evaluation

Evaluation of Results

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

Act 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

Evaluate results, predict maintenance
Find faults and potential dangerous