Substation Arrester Assessment Service - failure analysis

By: Arresterworks  09-12-2011

This is the most comprehensive analysis of failed arresters anywhere. 18-30 pages of analysis and cause of failure conclusions.

  1. In depth examination of the available parts.
  2. Close-up photography and microscopic photography to identify cause of failure.
  3. Gas analysis of unfailed partner arresters if available.

  4. Analysis of electrical characteristics of available disks. Any disk can be analyzed no matter how damaged.
  5. Leak checking using the appropriate method (HMS, vacuum, die penetrate, pressure decay) of failed and unfailed partner arresters

  6. In depth review of potential causes of failure and rationale of which ones are possible and which ones are not. The list includes.
    Moisture IngressImproper MCOV or TOV Rating
    Excessive Partial DischargeUnbalanced Electric Field
    LightningMisalignment of Disk Column:
    Temporary OvervoltageImproper Spring Pressure
    Switching Surge OverloadMechanical Stress
    Aging of DisksBurrs
    External ContaminationInsufficient Dielectric Strength

  7. And much more..

  8. Arresters that can be Analyzed: Porcelain 3-500kV, Polymer 3-500kV, Underoil, Elbow, Secondary.

  9. Contact Jonathan Woodworth at 716 307 2431 or at for more information or to make arrangements for a quote.

Other products and services from Arresterworks


Training Options

Fundamentals of Arresters Protected Equipment Considerations Field Testing of Arresters Overview of Arrester Suppliers EMTP Modeling of Arresters. This Seminar is intended for Substation or Transmission Standard Engineers, Operations Personnel, Substation Packagers and Consulting Engineers. Fundamentals of Surges How to Select a TLA TLA Mechanical Considerations TLA Disposal Trends in the Industry Compact Line Considerations.



New requirements for arresters will be issues that cover testing and evaluating arrester energy handling capabilities. Thermal Energy Rating Verification Tests Sequence and Evaluation. A new edition of IEC 60099-4 and IEEE C62.11 will be published. Surge Energy Rating Verification Test Sequence and Evaluation. Any stake holder that is interested in arrester standards. 10:00 to 11:00am Eastern Standard Time on February 25th.


Insulation Coordination Studies

The purpose of insulation coordination is to insure that insulation used in an electrical power system is adequate for the environment in which it is applied and to understand the probability of insulation failure under transient conditions. The resulting current levels in the station are quite low relative to direct strikes, but all that is needed to fail insulation is voltage and not current.


Surge Protection Seminars

This in-depth course is designed for those responsible for the reliability of substations, distribution systems, and transmission systems. Announcing a 1.5 day Surge Protection Seminar plus a .5 day Seminar on Lightning Studies Using ATPJuly 27-28. Reliability engineers and other reliability personnel responsible for continuous improvement. Lightning is the second or third most significant cause of outages on most power systems.


Substation Arrester Assessment Service - assessment

Site Visit Along with client personnel as desired by the client, each site is assessed and the following competed. Arrester Losses measured using state of the art watts loss metering. Arrester location relative to protected equipment documented. New arrester installation options analyzed.