by Thermo 1. June 2011 16:26

Integrated Diagnostics 

Dear BF,

My firm will consider and evaluate additional services beyond rejuvenation that will add quality or value to a requested proposal.  Additional options for cable testing services would be of particular interest.  An explanation of services and associated costs must be included with all additional service offerings.  Information submitted for this may lead to additional evaluation points in the “services to be provided” category.

Please help me with my decision matrix,

Tahoma

 

Dear Tahoma-

For my readers who are not local to the Pacific Northwest, like you and I, Tahoma is a local Indian name, which means “snow peak” and designates Mt. Rainier, the snow covered volcano close to Seattle and Tacoma.  I have a view of Tahoma from my pond too – feel free to visit me anytime and I will be happy to share my grubs.  I’m all for decision matrices.  Every time one of these has been used Novinium comes out on top – safer, faster, better.

Your query suggests that you have a particular interest in cable testing services.  I have provided several posts in the past that describe the issues and challenges associated with diagnostic testing.  I list several of them below for your review:

Post Date

Post Title

2011-05-19

On-line Diagnostic Testing

2011-05-11

Middle East Query – Diagnostic Testing Timing

2010-12-12

Electrical Treeing and the Principle of Parsimony

In short, this frog is skeptical of claims of efficacy for any of the commercially available diagnostic tests.  Compare the double-digit false positives and double-digit false negatives inherent in testing with this single digit – one percent.  That’s the number of post treatment failures that have occurred in all cables proactively treated with any of the globally commercialized rejuvenation technologies.  Novinium’s post-treatment reliability record is even better than the average!

Occasionally there are cases where diagnostics are appropriate.

Novinium’s diagnostic tool box includes several kinds of instruments including infrared imaging and three kinds of on-line partial discharge detectors.  Novinium uses infrared imaging technology to identify improperly installed compression connectors.  The picture nearby shows a side-by-side image of two splices, one installed properly and the other suffering from thermal runaway.  Three different on-line partial discharge detectors are available to pinpoint discharges in terminations, splices and cables.  A high frequency current transformer can be clipped around a cable or its neutrals to detect discharges in the cable or connected equipment.  A Transient Earth Voltage (TEV) sensor allows the pinpointing of local discharges.  For applications where it is not prudent to approach a piece of operating equipment such as air operated switchgear, an airborne acoustic sensor can locate discharges inaudible to the human ear.

In addition to these instruments, Novinium provides consulting services to circuit owners to diagnose problem areas using failure data.  This approach is the lowest cost and most accurate diagnostic available.  The method was documented in a DEIS (Dielectrics and Electrical Insulation Society) Feature Article in the March/April 2009 issue of IEEE Electrical Insulation Magazine, Diagnostic Testing of Stochastic Cables.

Diagnostically yours,

Thermo B.F.

Tags: , , , , ,

Potpourri

Comments (2) -

6/1/2011 5:50:56 PM #

Ms. Conducting

Dear Frog,

I see in  your portrait  you are sporting a fashionable stethoscope, a fine accessory to your natural green beauty.  Are you a doctor?  Perhaps an insulatrician?  Can you help me if I am having trouble with my elbows?

You have said that your company does not advocate cable testing, but I know from familiarity with your services that there is "valued added" that is part of the injection process.  The cable type, length, location, condition of neutrals, number of splices, and terminations get recorded in the NITS database, providing better information about the cable segments than may have existed before Novinium worked with them.  It seems this service is worthy of being consider as one of the "additional evaluation points" in the “services to be provided” category.

Regards,

Ms. Conducting

Ms. Conducting United States |

6/3/2011 1:36:46 PM #

T. B. Frog

Dearest Ms. Conducting-

Very insightful.  My skin is indeed beutiful!  I can and will help you with your elbows. Before year end, I will teach you how to live without them. Keep an eye on this blog for elbow news.

Your absolutely right about the extensive integrated testing and compilation that goes on with Novinium's rejuvenation process. A thorough survey of the condition of the neutral, the number of splices, and, optionally, their precise geographic location are just several of the conditons we monitor and record.

Salutations,
T. B. Frog

T. B. Frog United States |

Comments are closed

Frog Blog

Month List