MILESIGHT - LoRaWAN 500/30A CT305 three-phase current clamp

The Milesight CT305 is an intelligent current transformer designed to accurately monitor energy consumption in real time. Thanks to its LoRaWAN® technology, it ensures efficient data transmission over long distances, facilitating remote energy management.

Key features:

• Precise measurement: With a sampling frequency of up to 3.3 kHz and an accuracy of ±1%, the CT305 provides detailed data on the effective current of electrical systems operating at frequencies of 50 to 60 Hz.
  
  
• Suitable capacity: The CT305 is designed for nominal primary currents of 500 A and secondary currents of 150 mA, with a resolution of 1 mA, enabling granular current monitoring.
  
  
• Non-invasive installation: Its open-ended clamp-on ammeter allows rapid installation without circuit interruption, eliminating the risk of damage or power failure.
  
  
• Self-powered: The CT305 draws its power directly from the circuit being measured, eliminating the need for batteries and guaranteeing continuous, maintenance-free operation.
  
  
• Robust connectivity: Equipped with an external antenna and using the LoRaWAN® protocol, it ensures stable, reliable communication, even in harsh environments.

The Milesight CT305 is therefore an ideal solution for companies looking to optimize their energy management through precise monitoring, simplified installation and advanced connectivity.

Technical specifications:

Electrical measurement :

• Parameter detected: RMS current
• Sampling frequency: 3.3 kHz
• Operating frequency: 50 to 60 Hz
• Nominal primary current: 500 A
• Nominal secondary current: 150 mA
• Starting current: 30 A
• Accuracy: ±1%
• Resolution: 1 mA
• Temperature sensor: NTC type, measuring range -20°C to 100°C, accuracy ±1%.

Wireless transmission :

• Protocol: LoRaWAN®
• Antenna connector: SMA 50 Ω (SMA female)
• Supported frequencies: CN470, IN865, RU864, EU868, US915, AU915, KR920, AS923-1/2/3/4
• Transmission power:
• 16 dBm (868 MHz), 20 dBm (915 MHz), 19 dBm (470 MHz)
• Sensitivity: -137 dBm
• Modes: OTAA/ABP Class A

Other features :

• Button: Restart
• LED indicator: Status/Alarm
• Port: USB Type-C for power, console or temperature sensor connection
• Configuration: Via USB Type-C or downlink

Physical characteristics:

• Power supply: Self-powered by induced current
• Isolation voltage: 3 kV AC (rms) (1 mA/1 min)
• Material/Color: PBT+PC (UL94 V0) / Blue
• Cable length: 1 m
• Operating temperature: Transmitter: -20°C to 70°C; CT Clamp: -40°C to 55°C
• Storage temperature: Transmitter: -25°C to 80°C; CT Clamp: -40°C to 55°C
• Relative humidity: ≤ 95% (non-condensing)
• Protection rating: IP30
• Dimensions: Transmitter: 38 × 39.7 × 16 mm; CT Clamp: 65.52 × 90 × 43 mm; Wire hole diameter: 36.6 mm
• Weight: Transmitter: 13.05 g; CT clamp: 276.75 g
• Installation: Transmitter: Clamp-mounted (in integrated mode); CT clamp: Suspended from the conductor under test