Collection

Current Transformers (CTs)

Current transformers (CTs) are the sensing element behind accurate electric metering, stepping down high primary currents to a safe, measurable signal for power meters and energy monitoring systems. Emergent Metering's CT collection offers a wide range of amperages with standard 0-5A secondary output, plus split-core and solid-core designs for both new installations and live retrofit projects.Choose split-core current transformers for fast, no-downtime installation around existing conductors, or solid-core CTs for the highest accuracy in new builds. With ratings spanning from small branch circuits up to thousands of amps, these CTs pair with revenue-grade meters, LoRaWAN current sensors, and sub-metering panels to measure load, verify utility bills, and support energy management programs.Browse the collection to find the right CT ratio and window size for your conductors. Not sure which amperage or core type fits your application? Contact our metering team for help matching CTs to your meter and panel.

Showing 1–6 of 6 products

Milesight

Milesight CT101 - LoRaWAN CT Current Sensor

From $155.00

In stock

Emergent Energy Solutions

100 Amp (0-5A) Current Transformer (CT)

From $45.00

In stock

Emergent Energy Solutions

600 Amp (0-5A) CT Current Transformer (CT)

From $65.00

In stock

Emergent Energy Solutions

4000 Amp (0-5A) Current Transformer CT

From $300.00

In stock

Emergent Energy Solutions

2000 Amp (0-5A) Current Transformer CT

From $250.00

In stock

Emergent Energy Solutions

1000 Amp (0-5A) Current Transformer (CT)

From $200.00

In stock

Current Transformers (CTs) — FAQ

Common questions about this category.

What is the difference between split-core and Rogowski CTs?

Split-core CTs use an iron core and are ideal for permanent installs on smaller and mid-sized conductors. Rogowski coils are flexible and easier to install on large or awkward bus, and they handle very high amperages where iron-core CTs become impractical.

Which amperage ranges are stocked?

The library spans 5 A through 6000 A, with accuracy classes appropriate for both revenue metering and ASHRAE 90.1 / IECC submetering work.

How are CTs matched to a meter?

CT selection depends on conductor size, expected load, required accuracy class, and the meter input rating (typically 0.333 V or 1 A). We size CTs against the meter and panel together so the system stays in spec across the load range.

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