Staying Safe from High Voltage with Remote Current Sensor & Relay Combos

September 12, 2017
Tech Tuesday


Here’s a scenario that may be familiar: the current of a high voltage load needs to be monitored with a current sensor, and the current sensor needs an integrated relay with 10A rated contacts. It seems easy, however when working with high voltage, some special equipment (and maybe even a licensed professional) is required. Fair enough, a professional is called to the scene to install the current sensor and relay combination. Everything is going well until it is discovered that the trip point on the current sensor is too high, and something needs to be adjusted! There’s no option but to get the licensed professional back out to the scene to make the small adjustment. This installation is taking a lot of time, and time means money.


What if Functional Devices had a RIB® current sensor and relay combination product that could eliminate the second trip of the licensed professional? If the above scenario sounds familiar, there may be a benefit to using one of our remote current sensor and relay combination devices (models RIBXLCRA or RIBXLCJA). Read on to see how those products may save you time and money!

When it comes to setting the adjustable threshold on RIB® current sensors, the process may need to be revisited after installation. There are other current sensor and relay combination devices in the market that require access to the high voltage compartment to adjust the current sensor threshold. If RIB® models RIBXLCRA or RIBXLCJA were used, the adjustment screw would be located safely outside of the high voltage compartment, as seen in the illustration below.

Access to the low voltage relay coil input and the current sensor status output is as easy as loosening one screw on the housing cover. The class 2 rating on the low voltage side of the device is maintained because the low voltage portion of the device is located outside of the high voltage compartment. Would you rather have a fixed threshold current sensor? Consider either model RIBXLCRF or RIBXLCJF. As for the choice between a solid core or split core remote current sensor, see the selection chart below.

Whether you prefer a split or solid core current sensor with a fixed or adjustable threshold, all with an integrated 10A contact rated relay, we might have the device you’re looking for! Not sure what exactly to choose? Give us a call or send over an email to get some technical help – just ask for the Support Team.

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About the Author

Meet Samuel Klennert – you can call him Sam. He was born and raised amongst the farmland of Indiana, which included corn, soybeans, and sometimes wheat. Sam graduated from Purdue University with a Bachelors degree in Electrical and Computer Engineering Technology in 2015. He has a focus in analog circuitry and power electronics, but he’ll give software a try from time to time – just not that digital witchcraft!

Outside of work, Sam enjoys outdoor activities including (but not limited to) hiking, mountain biking (or just really-big-hill biking), and camping. Call Sam for tech support today – he’ll give his best effort to any task at hand!