Category Archives: Transformers

How Rogowski Coils Work

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Named after their inventor, Walter Rogowski, the Rogowski style of coils were first developed in 1912.  They basically function as a measurement tool that determines the current moving through a conductor that has been inserted within the flexible Rogowski loop.  Rogowski coils allows the observer to accurately examine the changes in current over a given […]


DC Voltage Output CT Comparison

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If you need an Adc to Vdc transducer, you’ll want to compare the Magnelab DCT series and the Sentran Corp 4DS series.  To help you do this, consider the following chart: *May be customized. As response time decreases, ripple increases, and vice versa As you’ll see from the chart above, the Sentran 4DS can be optimized for […]


Regular to Revenue Grade Current Transformers: The difference is in the dollars

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Not all AC current sensors are created equal. Some are able to measure energy usage with acceptable accuracy, while others can pin down your energy bill to within 0.2%. What makes a Revenue Grade Current Sensor? Typically, current transformers are available in two accuracy classes: standard (or regular) CTs, as well as revenue grade CTs. […]


Wireless CTs Connected to Measurlogic’s Modbus TCP Meter

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Today I hooked up Measurlogic’s DTS-310 Modbus TCP meter to Magnelab’s wireless CT system, the SCT-200W. After getting it set up I created a short video. Here’s the transcript: This is Victor Fehlberg here and today I’ll be showcasing Magnelab’s wireless SCT 200w series. What I’ve got set up here – this is the wireless […]


UL Listed Current Transformers Now Available

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I’m happy to announce that Aim Dynamics has partnered with Sentran Corporation to provide exciting new lines of UL Listed current transformers.  Sentran Corporation is known for its ability to produce top-of-the-line current transformers and current transducers.  Aim Dynamics now carries a large stock of their products.  You, the customer, gets the best of both […]


New Rogowski Coil Videos Available

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I recently created a blog on increasing the output of a Rogowski coil.  To add to the content of that blog post, I’ve also created a video that describes the effect of wrapping a Rogowski coil multiple times around  a conductor. A couple of weeks ago I also added a video on Magnelab’s new “tear drop” Rogowski […]


Increasing the Output of a Rogowski Coil without an Integrator

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Rogowski coils are convenient, lightweight, and easy-to-install.  However, the output of a Rogowski coil is very low. For example, the RCT-1800-000, made by Magnelab, outputs 70 mV for every 1000A on the primary, when operating at 60 Hz.  If operating at 50 Hz the output is even lower, only 58.33 mV per 1000A.  Dent Rogowski […]


Current Transformer Basics: What You Need To Know About Current Transformers

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A current transformer is a device that is designed to create an alternating current from a direct current. The device will measure the direct current in its primary winding and convert it to a proportional alternating current in its secondary winding. They are used to reduce a high voltage current into a much smaller and […]


Monitoring the Alt Energy Revolution

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With the negative effects of climate change—stronger storms, colder winters, hotter summers—becoming more and more visible, the utilization of renewable energy sources is becoming more and more commonplace. In Germany, for example, solar energy has become one of the top sources of electricity in the country. Besides the greater emphasis on using renewable energy sources, […]


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

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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 […]


How a Current Transformer Transforms Electricity

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You’ve probably seen one of those hollow circular devices that enclose transmission lines and are connected by smaller wires to an electrical measuring device, particularly an ammeter. This device, known as a current transformer or current sensor, protects ammeters from power overload by reducing dangerous amounts of current flowing through a power line to more […]


Things to Look for in a DC Current Transducer

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Transducers work by measuring energy (usually electrical) found in a system, and converting this into another energy form, such as sound. In many applications, several transducers are needed to achieve the desired results. For example, in ultrasound imaging, a transducer converts electrical energy into ultrasound or high energy sound waves, which are then focused on […]


Why Your Company Needs Accurate Power Monitoring

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The power usage of major businesses is often high and the accompanying expense is equally astronomical. Having accurate data on how much electricity is consumed can give you ideas on how to create opportunities for savings. Here’s just a few examples of how power monitoring systems can help improve a company’s bottom line:


Considerations when Selecting a Current Sensor

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It goes without saying that a current sensor, regardless if it’s a split core or solid core, has to be very accurate. This can be achieved either by having core built with high-quality, expensive materials and manufacturing processes; or by getting a device that is easy enough to calibrate on various kinds of electrical measurement […]


Design Considerations for AC Current Sensors

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Due to their ability to make high-voltage and high-amperage inputs measurable without significantly affecting the circuit being measured, AC current sensors are commonly used in power monitoring systems. When incorporating these sensors into a monitoring setup, it’s important to take their design specifications into account. Below are some of the key specifications that need to […]