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PD Approach

The PD Approach film (below) uses live filming in substations plus advanced 3D graphics to ‘look inside’ switchgear and transformers and examine the causes and effects of PD. It also explains the latest tools and techniques available to detect, locate, measure, monitor, analyse and interpret PD activity.




Chapter 1: Introduction

You will find PD activity in all types of high voltage power assets from switchgear to transformers, overhead lines to underground cables causing degradation and failures…see the clip below




Chapter 2: What is PD?

A Partial Discharge is an electrical discharge or spark that bridges a small portion of the insulation between two conducting electrodes. PD activity can occur at any point in the insulation system where the electric field strength exceeds the breakdown strength of that portion of the insulating material…see the clip below



Chapter 3: Causes of PD

Partial Discharge activity has many causes, including voids in solid insulation often caused during manufacture, mechanical breakdown or damage to insulation, sometimes caused during installation, particle contamination, design defects such as poor stress control or irregularities. Or a combination of factors that are characteristic of assets getting old and ultimately breaking down…see the clip below



Chapter 4: PD Effects

Partial Discharges emit energy in several ways, producing electromagnetic emissions in the form of radio waves, light and heat acoustic emissions, in the audible and ultrasonic ranges and ozone and nitrous oxide gases…see the clip below



Chapter 5: PD Fault Detection


How do we find out if PD activity is at a level that needs investigating further? Simple. Use our award winning UltraTEV Detector to carry out a first pass survey… see the clip below



Chapter 6: PD Activity Measurement

Want to know more about PD activity? Choose the UltraTEV Plus+ It uses the same dual sensor technology as the UltraTEV Detector, but with a lot more features including a colour screen showing details of PD activity as numerical and graphical values…see the clip below



Chapter 7: PD Activity Investigation

How do we locate the exact site of PD activity and investigate its magnitude and severity? Our UltraTEV range of handheld instruments will get you very close to the sources of PD. But for total accuracy and speed use the UltraTEV Locator…see the clip below



Chapter 8: PD Activity Monitoring

Due to the possibility of PD being intermittent in nature, it’s often important to measure PD activity over time. So we developed the UltraTEV Monitor. The most powerful system of its kind in the world. It’s a COMPLETE asset monitoring AND alarm system for managing the condition of substation assets 24/7…see the clip below



Chapter 9: PD Activity Alarms

In some situations, PD activity can escalate rapidly, from a non-critical fault, into a sudden failure. So, we have built a groundbreaking PD alarm and early warning system to give operators of mission-critical assets complete peace of mind 24 hours a day…see the clip below



Chapter 10: PD Activity Data

Data on PD activity is the key to understanding the true condition of your assets, providing vital information so you can make more intelligent decisions on maintenance interventions and asset replacement... see the clip below



Chapter 11: PD Instrument Support

All EA Technology Instruments are backed by our network of more than 35 offices and distribution partners worldwide...see the clip below



Chapter 12: PD Services

EA Technology provide a full range of PD services across the world, including expert technicians to identify and diagnose PD related faults, complete comprehensive surveys and condition reports on all your site assets... see the clip below



Chapter 13: Demonstration

EA Technology has the best available Instruments and Services to enhance the reliability and performance of your assets, through a better understanding of partial discharge activity.

And we would be delighted to demonstrate them to you. Anywhere in the world... see the clip below



For more details please contact: 0800 028 7243 or email sales@eatechnology.com

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