Worked example
No result for these values. The message above the form says which field to change.
Smallest matching current option
ZEM-65-120
- Option
- 120 A per-phase split-core CTs, 14 mm aperture
- Exact catalogue code
- ZEM-65-120
- Current margin below the rating
- 20 A
- Aperture margin around the conductor
- 0 mm
A catalogue ordering path, not metering-class, insulation or installation approval.
Underlined figures are rounded. Select one to copy its full value.
Method and assumptions
Formula
eligible option: rating ≥ maximum current and aperture ≥ measured outside diameterThe output is an ordering-path aid tied to the current catalogue, not CT metering-class or installation approval.
Limits of this result
- Measure the complete conductor, insulation, lug or cable bundle at the intended CT location; conductor area alone does not determine outside diameter.
- Mini-CT options are only for the secondary of an existing 1 A or 5 A CT and are not placed around a primary conductor.
- Confirm waveform, metering class, burden, insulation, CAT rating, protection and installation safety separately.
- Current is per phase: the rating of each CT or coil, not the total across three phases.
- The 300 A Rogowski coil closes to about 70 mm across; the 1 kA, 3 kA and 6 kA coils are not fit-selected here because their clear aperture is not yet reviewed for every variant.
Technical sources
Put the value to work
Read the related engineering guidance, or carry this task into System Builder to identify the signal path and EpiSensor products.