New Digital EL CID Tester Has Arrived!

January 05, 2008

Schulz Electric Company's Maine locations, Maine Industrial Repair Services and Stultz Electric Motor & Controls, are excited to announce the arrival of a new digital EL CID tester . We know the importance you, our valued customers, have put on this piece of equipment, and we are happy to be able to provide this state of the art service to you.

A Little History

The electromagnetic core lamination fault detection technique, now universally known as EL CID, was originally developed around 1980 by the then Central Electricity Generating Board (CEBG) in the UK, to solve certain test requirements on turbo generators. Since that time the technique has been used increasingly worldwide on generators and large motors. The other and long established method of testing the integrity of magnetic core laminations is by means of a high power loop or rated flux test, often referred to as a Hugh Flux Ring Test, carried out with the rotor of the generator removed.

The EL CID test uses a similar excitation winding but at a very low flux level, typically 4% of rated flux. The heat produced by faults is negligible and not detectable, but the fault current is detectable by the electromagnetic means and it is this fault current, when scaled up to the appropriate rated flux level, which would give rise to the local generation of heat and associated hot spots.


Advantages of EL CID:

  • Low excitation power- 4%
  • Fast!  Easy to set up
  • Low manpower requirements
  • Significant reduction in safety hazards
  • Portability
  • Instant interpretation of test results
  • Permanent data storage
  • Minimal risk of further damage
  • Ability to re-test during maintenance cycle