Current Transformers vs. Electrical Surges

You’ve probably often heard that you need to unplug your home appliances when not in use to protect them from electrical surges. This advice, if put into practice, can protect your investments. Electrical surges, after all, may not only damage your appliances but also cause fires. Here are some facts you need to know about this phenomenon to avoid its devastating effects. Continue reading


Look, Ma, No Magnets

Whereas core-type current transformers have magnetic cores, flexible ones like Rogowski coils don’t have any. A Rogowski coil’s shell only houses a helical coil wire whose ends are located at the attachable terminals. If a Rogowski coil had a magnet inside, it would lose its flexibility due to the solid slab of magnetic material.

Instead, it relies on the electromagnetic field the conductor itself generates, which simply refers to the metal conduit. Flexible transformers rely on Ampere’s law to pick up the electromagnetic field looping around the wire. According to the law, current movement along this imaginary loop is the same as current movement along the conduit. Continue reading

Flexible Current Transformers: Better Energy Efficiency with eGauge

Energy monitoring can lead to energy savings. This, in turn, can lead to benefits for the bottom line and the environment. Flexible current transformer suppliers like Aim Dynamics can provide you with the energy monitoring tools you need to track your electricity consumption. One of the company’s most revered products, the eGauge, can help you identify, plan, and execute energy-saving measures in a systematic way.

What is the eGauge?

The eGauge is a stand-alone product that can reduce the power usage of a commercial or residential property. It can be integrated with certain systems if you want to take your energy savings to the next level.

Rogowski Coil in Current Transformers

Current transformers contain at least one Rogowski coil. Named after the German physicist Walter Rogowski, the Rogowski coil is an electrical device used for measuring alternating current (AC) or high speed current pulses.


In its most basic form, a Rogowski coil appears as an evenly-wound helical coil of N turns per meter on a non-magnetic former of constant cross sectional area A. The wire with the lead from one end returns through the center of the coil to the other end. The two terminals end up at the same end of the coil. Continue reading

Adapting a New Flexible Current Transformer in a Data Center’s Grid

A data center is one of the prime assets a medium or large company may have. However, something’s amiss when part of its machinery breaks down and compromises your information as a result. Part of the power solutions may include erecting a new flexible current transformer set-up with support from a company such as Aim Dynamics.

Flexible current transformers or FCT are fundamentally the same as split-core current transformers in the sense that they do not have to physically tap directly inside a circuit. The most prominent feature of an FCT is that the Rogowski coils are soft – making them easier to install in areas with little room – and they are wrapped in colored linings.

A Quick Guide to Selecting a Current Transformer

When you’re planning to install an ammeter in an existing electrical circuit that transmits high voltage electricity, you will need to also install a current transformer. This is a device that reduces the voltage of the electricity flowing through the system to protect the measuring device and the person installing it from electrocution. However, choosing a current transformer suitable for the circuit is not that simple. Continue reading

Don’t Open-circuit a CT’s Secondary Winding

When measuring or monitoring the amount of current passing through a transmission line, an ammeter—a device that measures electric currents—is connected to the primary conductor (transmission line) via a current transformer (CT). A CT reduces the amount of current flowing through the primary conductor to protect the measuring instrument. The CT, in turn, is connected to the measuring instrument via a secondary winding. Continue reading