5 Easy Methods to Find The Current Transformers You Need

Power meters and current transformers work best for multi-circuit applications or precision industrial metering if you can answer basic questions on its application, load size, form factor, output, load size, rating, and if it uses Rogowski coils. Let's dive into these five selection factors for current transformers.

5 ways to find the perfect current transformer

Form Factor

Split and solid-core current transformers have different form factors. Split core and Rogowski coil transformers can work best when filling in for an aged unit because they easily fit around most conductors and have no wire disconnection requirement. On the other hand, using solid-core current transformers during new facility constructions can work and save you a lot in cost. However, you might want to consider the accompanying installation cost.

Current Transformer Output

Current transformers usually have a 33mV, 5A, and 80mA output option. The transformer you choose should consider your metering equipment output compatibility. Doing so will ensure its possibility to make in-field adjustments.


Load Size

Load size measurement ensures you have the right current input or amperage range suitable for your application. Fluctuating loads need current transformers with a general current sensing range. This is done using a flexible Rogowski coil. Proper load size ensures the meter can accurately measure loads without disrupting the circuit.

Accuracy Rating

Building management systems require highly-accurate current transformers. Equipment usage impacts monthly utility bills heavily. Some manufacturers can label their current transformers as revenue-grade and comply with accuracy standards. Businesses that need overall consumption data for trend measurements should opt for high-accuracy sensors.

Rogowski Coil Usage

Rogowski coils have become a standard component because of their amperage range, flexibility, portability, and high saturation points. You can retrofit your old transformers by using an integrator that allows changing your Rogowski coil output to your transformers.

You can always trust Mod-Tronics Instruments Limited to provide top-notch current transformer services. Contact us today to learn more about our products and services.