{"product_id":"milesight-ct305-lorawan-500a-smart-current-transformer-eu868","title":"Milesight CT305 LoRaWAN 500A Smart Current Transformer (EU868)","description":"\u003cp\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eMilesight CT305\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is an advanced \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLoRaWAN Smart Current Transformer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e designed for wireless electrical current monitoring in commercial buildings, industrial facilities, electrical distribution panels and energy management applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith a rated measurement capacity of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e500 A RMS per current transformer\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the CT305 enables reliable monitoring of medium-to-high electrical loads without requiring conventional hardwired monitoring infrastructure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts innovative \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003esplit-core clamp design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e allows current transformers to be installed around existing conductors without cutting the cables, providing a practical solution for retrofitting existing electrical installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe CT305 supports \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eup to three independent current measurement channels\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, enabling the simultaneous monitoring of three electrical phases or separate circuits using a single LoRaWAN communication module.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis makes it particularly useful for monitoring three-phase distribution systems, industrial machinery, HVAC installations, pumping stations, UPS circuits and electrical loads across commercial and industrial buildings.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe device measures \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRMS current\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with a sampling frequency of up to \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3.3 kHz\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e±1% measurement accuracy\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1 mA resolution\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIn addition to instantaneous current measurements, the CT305 supports reporting of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eaccumulated current data in ampere-hours (Ah)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, providing useful information for current usage trends and equipment operating patterns.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eUnlike conventional battery-powered IoT sensors, the CT305 uses \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003einduced current power supply\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, harvesting operating energy from the monitored conductor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ebattery-free design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e reduces routine maintenance and eliminates battery replacement requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor low-current applications where induced energy may be insufficient, the device also supports \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eexternal 5V power via USB Type-C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe CT305 operates on the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eEU868 LoRaWAN frequency band\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, supporting long-range wireless data transmission to compatible LoRaWAN gateways and network servers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIt supports \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eOTAA and ABP activation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, operates as a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLoRaWAN Class A device\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, and can be integrated into compatible IoT monitoring platforms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe CT305 also provides configurable \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ecurrent threshold alarms and overrange alarms\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, allowing the monitoring system to identify unusual current conditions, overloaded equipment and unexpected changes in electrical consumption patterns.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFor enhanced monitoring, the device supports an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eexternal NTC cable temperature sensor\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, enabling temperature measurements from \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e−20°C to +100°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e when a compatible sensor is connected.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe communication module features a \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eUSB Type-C port\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e for configuration, external power supply and compatible temperature sensor connectivity, as well as an LED indicator for operating status and alarms.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFirmware maintenance can be performed using the supported \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFirmware Update Over the Air (FUOTA)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e functionality.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIP30 protection rating\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, the CT305 is intended for suitable indoor installations, particularly within electrical cabinets and protected technical environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe CT305 provides a practical solution for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eelectrical current monitoring, equipment status detection, predictive maintenance, load analysis and Industrial IoT applications\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eImportant:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e The CT305 directly measures RMS current and accumulated current. Compatible device versions can also calculate energy consumption using user-configured voltage and power factor values. Voltage and power factor are not measured directly. For applications requiring direct measurement of voltage, active power and electrical energy, select an appropriate energy meter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e🔑 Key Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e⚡ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e500A RMS Current Measurement\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Measures electrical current up to 500 A per CT channel.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔌 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eUp to 3 Independent Channels\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Monitor three phases or separate electrical circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e📡 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLoRaWAN EU868 Connectivity\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Long-range wireless communication with compatible IoT networks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔋 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eBattery-Free Operation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Powered by energy induced from the monitored conductor.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔌 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eOptional 5V USB-C Power\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – External power supply for low-current operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🧲 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eSplit-Core Clamp Installation\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Non-invasive installation around existing electrical conductors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🎯 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e±1% Measurement Accuracy\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Reliable current monitoring for operational applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e📊 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e3.3 kHz Sampling Frequency\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – High-frequency sampling for accurate RMS current measurement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e📈 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAccumulated Current Monitoring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Supports accumulated ampere-hour (Ah) reporting.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔔 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eCurrent Threshold Alarms\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Detect abnormal current levels and equipment operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🚨 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eOverrange Alarms\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Alerts when current exceeds the configured measurement range.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🌡️ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eOptional Cable Temperature Monitoring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Supports an external NTC sensor from −20°C to +100°C.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e⚙️ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRemote Configuration\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Configure supported parameters using LoRaWAN downlinks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔧 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eUSB Type-C Interface\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Local configuration, optional power and compatible temperature sensor connection.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔄 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eFUOTA Support\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Firmware updates over the air.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e📶 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLoRaWAN Class A \/ OTAA \/ ABP\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Compatible with standard LoRaWAN network infrastructure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🛡️ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIP30 Protection\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Designed for protected indoor installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🏭 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIndustrial Current Monitoring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Suitable for machinery, distribution boards and industrial equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e🛠 Applications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e🏢 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eCommercial Building Energy Management\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Monitor electrical current trends across building distribution systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🏭 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIndustrial Machinery Monitoring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Detect changes in equipment load and operating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e⚡ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eThree-Phase Electrical Systems\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Monitor current on up to three electrical phases.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e❄️ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eHVAC \u0026amp; Chiller Systems\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Monitor current consumption patterns of chillers, compressors and HVAC equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e💧 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ePumping Stations\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Detect pump operation, abnormal loads and unexpected shutdowns.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔌 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eElectrical Distribution Panels\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Wireless current monitoring for main and sub-distribution circuits.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔋 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eUPS \u0026amp; Critical Power Infrastructure\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Monitor current in suitable electrical backup systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🏗️ \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eManufacturing Production Lines\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Monitor electrical loads across industrial production equipment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e🔧 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ePredictive Maintenance\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Identify unusual current patterns that may indicate equipment problems.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e📊 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eLoad Profiling \u0026amp; Operational Analysis\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Analyze current usage patterns over time.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e📡 \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIndustrial IoT Monitoring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – Collect current measurements from distributed facilities through LoRaWAN networks.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003e📦 Package Includes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × Milesight CT305 LoRaWAN Current Monitoring Unit with the selected CT clamp configuration\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × Compatible LoRaWAN antenna\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × USB-C NTC temperature sensor, according to the manufacturer's standard CT3xx packing list\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × Quick Guide\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × Warranty Card\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e📚 \u003cstrong\u003eProduct Downloads\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/resource.milesight.com\/milesight\/iot\/document\/ct3xx-datasheet-en.pdf\" title=\"Milesight CT305 – LoRaWAN® Smart Current Transformer Sensor (EU868)\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline; color: rgb(43, 0, 255);\"\u003eDatasheet – Milesight CT3xx Series\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan style=\"text-decoration: underline; color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/resource.milesight.com\/milesight\/iot\/document\/ct3xx-user-guide-en.pdf\" title=\"Milesight CT305 – LoRaWAN® Smart Current Transformer Sensor (EU868)\" style=\"color: rgb(43, 0, 255); text-decoration: underline;\"\u003eUser Guide – Milesight CT305\u003c\/a\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e🎥 \u003cstrong\u003eProduct Video\u003c\/strong\u003e\n\u003c\/h3\u003e\n\u003ch3\u003e\n\u003cbr\u003e\u003ciframe width=\"1903\" height=\"750\" src=\"https:\/\/www.youtube.com\/embed\/GLnwm5Wy8Rk\" title=\"Milesight Smart Current Transformer Introduction\"\u003e\u003c\/iframe\u003e\u003cbr\u003e\n\u003c\/h3\u003e","brand":"Milesight","offers":[{"title":"Default Title","offer_id":51670242197840,"sku":"CT305-868M","price":188.5,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/0489\/4032\/files\/CT305.webp?v=1752061493","url":"https:\/\/invibitshop.com\/products\/milesight-ct305-lorawan-500a-smart-current-transformer-eu868","provider":"InviBIT Shop","version":"1.0","type":"link"}