Author: Izoelektro d.o.o.

Dedicated smart-phone app for arrester condition monitoring with RAM-1 smart device officially launched on Google Play for Android devices. The official RAM-CENTER app from Izoelektro gives you full control of the installed RAM-1 devices thus enabling monitoring of surge arresters in electrical grids. The app enables you graphic monitoring of the measurements as well push…
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On July 29th, 2020 installation of 6 RAM-1 devices was performed for Elektro Gorenjska:Location 1: Železniki – Bohinj, Elektro Gorenjska System: 110 kV transmission line, Surge arresters: Uc = 86kV, IEC class 3, Number of devices: 3. Location 2: Soriška planina, Elektro Gorenjska System: 20 kV distribution line; Surge arresters: Uc = 24 kV, IEC…
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Nordic Semiconductor has performed tuning of the BLE antenna as well as did a quick check on GPS and mobile antenna (note the latter did not have the tuning applied yet). A set of value changes has been suggested as shown below. No geometry changes are required. Performance improvement with tuning Before: Bluetooth: around -73,…
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The device has been sent to Antenova to perform tuning of the mobile antenna. The testing has been conducted and results are available for integration into the design. Required changes are changes to the antenna tuning component values only, no layout changes required. Performance improvement test with tuning Following measurements are before tuning and after…
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RAM-1 device uses has a built-in accelerometer sensor for device’s inclination status indication which serves to alert false installation or any physical damages during device’s lifetime. Furthermore, with proper use also the status on high constructions (power grid pylons, wind turbines, railway grid, telecommunication gateways, skyscrapers, high chimneys, cranes, …) inclination can be assessed as…
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The subject of the invention is a device and a method for monitoring the condition of metal-oxide surge arresters installed in electricity distribution networks. Condition of metal-oxide surge arresters is monitored by measuring the resistive component of the leakage current flowing through metal-oxide surge arrester. The subject of the invention solves technical problems: precise measurements…
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RAM device is designed to last up to 20 years in the field assuming a use-case specified in Configuration and power consumption. Such lifetime is provided only by LiSOCl2 primary lithium battery chemistry and as such this is chosen for this device. Device supports the following configuration: 2x Primary lithium battery in size 17500 or…
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In addition to NB-IoT connectivity we implemented BLE as well. Each user can connect directly to the RAM-1 device via the Bluetooth low-energy (BLE) wireless communication from a smartphone. When in range of the device, press scan and select the RAM device from the list. Upon successful connection RAM-1 replies with the latest information and…
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We moved the whole RAM-1 project administration to Amazon’s AWS cloud service. AWS enables us to connect to every RAM-1 device remotely using pretty much any known communication protocol and thereby read data from each device, send new configuration parameters as well as do remote firmware upgrades, thus is bringing new features to the devices.…
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RAM-1 device was upgraded with its first additional feature, the surge counter. The device will be enabled with overcurrent events detection which is commercially known as the surge counter. Combined with location information the system can serve as a powerline lightning strike locator. Measuring range suitable for field operation is determined to be from 1…
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