The 6-Piece Traditional Circuit Breaker Testing Tulips / Electrode Set (manufactured by ElectroLinkUSA) is a core secondary injection hardware accessory utilized by field technicians to run timing and primary/secondary simulation test loops on molded case circuit breakers (MCCBs)
Imperial Sizing Layout: Optimized directly for North American industrial standards, fitting the vast majority of commercial low-voltage power distribution setups.
Permanently Engraved Markings: Each individual electrode features deep, laser-engraved fraction sizing directly on the outer sleeve shell so technicians can easily identify and pull the correct piece in dimly lit substation environments.
Enhanced Contact Profile: Minimizes local contact resistance variations, preventing false test readouts or overheating spikes when running high-amperage current loops.
Protective Storage: The full 6-piece assembly is shipped and organized inside a dedicated heavy-duty protective storage sleeve to prevent thread scoring or structural damage inside field toolboxes.
The kit is precisely curated with the six most common commercial thread and stab sizes found across major breaker lines (such as legacy Eaton/Cutler-Hammer, General Electric Spectra, and Square D frames):
| Piece | Electrode Size (Inches) | Typical Frame Class Mapping |
| 1 | 3/16″ | Small-frame MCCBs / Auxiliary control stabs |
| 2 | 7/32″ | Compact commercial distribution frames |
| 3 | 1/4″ | Standard industrial multi-pole breakers (100A–250A) |
| 4 | 5/16″ | Mid-tier heavy duty industrial frames |
| 5 | 3/8″ | Larger multi-pole thermal-magnetic / Electronic trip breakers |
| 6 | 1/2″ | High-amperage heavy industrial MCCB frames (400A+) |
