CZK
EURMilesight CT303 - Smart Current Sensor (300 A, 3-phase)
Milesight CT303 - Smart Current Sensor (300 A, 3-phase)
LoRaWAN® 3-phase smart current transformer, 300 A per phase, ±1 % accuracy. Non-invasive clamp-on, self-powered (no battery), USB-C configuration, IP30. More
Manufacturer: Milesight
Product code: 99.26.3632.3996
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139 EUR
excl. VAT (168,19 EUR incl. VAT)
LoRaWAN® 3-phase smart current transformer, 300 A per phase, ±1 % accuracy. Non-invasive clamp-on, self-powered (no battery), USB-C configuration, IP30. More
Manufacturer: Milesight
Product code: 99.26.3632.3996
The Milesight CT303-868M is a three-phase LoRaWAN® smart current transformer for monitoring energy use in electrical installations. It measures RMS current on three channels simultaneously with a 300 A rated primary current, 1 mA resolution and ±1 % accuracy, sampling up to 3.3 kHz across 50–60 Hz, and accumulates ampere-hour data for remote consumption tracking.
It uses non-invasive split-core clamps (Ø24.2 mm conductor opening) that install around live conductors without de-energizing, and is self-powered by the induced current — no battery required. A USB-C port is provided for configuration via Milesight ToolBox. UL94 V-0 PBT+PC enclosure, IP30.
Before you install
- Setup: over USB-C or a LoRaWAN downlink, no app.
- Power: self-powered from the measured conductor (phase A), no battery; or via USB-C.
- Data: over LoRaWAN — needs a LoRaWAN gateway to send data (sold separately); remote monitoring via the Milesight platform is free for up to 10 devices.
Parameters
| Wireless Protocol | LoRaWAN®, Class A (OTAA/ABP) |
| Frequency | EU868, max. 16 dBm |
| Current Measurement | 3-phase RMS, 300 A per phase, resolution 1 mA, accuracy ±1 %, sampling up to 3.3 kHz |
| Configuration | USB-C (Milesight ToolBox) |
| Power | Self-powered from measured conductor (no battery) |
| Enclosure | PBT+PC (UL94 V-0), IP30; split-core clamp Ø24.2 mm opening |
| Dimensions | Transceiver 38 × 34.5 × 16 mm; clamp 56.5 × 36.5 × 68.5 mm |
| Mounting | Non-invasive clamp-on around live conductors |
| Certifications | CE, FCC, RoHS |