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Milesight  |  SKU: CT305-868M

Milesight CT305 | Self-Powered LoRaWAN Smart Current Transformer (500A)

Price excl. VAT
€188,24
Price incl. 19% VAT
€224,01
Shipping calculated at checkout. Shipping policy

The Milesight CT305 is a self-powered LoRaWAN current sensor for non-invasive energy monitoring.

  • Self-powered: from Phase A induced current, USB-C backup
  • Capacity: up to 500 A RMS at ±1% accuracy, 3.3 kHz sampling
  • Full three-phase view: all three phases plus cable-temperature support

VAT & Business Purchases

Prices are shown excluding VAT. For EU deliveries, VAT at the rate of your delivery country is added at checkout. EU businesses with a valid VAT number pay no VAT: enter your company name and VAT number at checkout and the order is invoiced under the intra-community reverse-charge rules. Orders delivered within Cyprus always include Cyprus VAT.

Secure Payment & Warranty
  • Encrypted Checkout: Shop with confidence via Shopify Payments or PayPal Express for fully secure, PCI-compliant transactions.
  • B2B Flexible Billing: For large-scale infrastructure orders, we offer Direct Bank Transfer (SEPA/SWIFT) options. Please contact our team for a pro-forma invoice.
  • Warranty & Support: Consumer purchases are covered by the 2-year legal guarantee of conformity, and manufacturer warranty terms apply per brand. Our engineering team at shopioT provides technical support.

Delivery and Shipping

Tracked delivery within Cyprus by ACS Courier, and to all EU member states, the United Kingdom and Switzerland by FedEx International Priority. Orders ship from our warehouse in Nicosia, Cyprus, typically within 1–3 business days. Shipping cost is calculated at checkout by destination and parcel weight. See our Shipping Policy for rates and delivery times.

EU business? Enter your company name and a valid EU VAT number at checkout to remove VAT (reverse charge).

Description

The Milesight CT305 is a professional LoRaWAN® Smart Current Transformer designed for the intensive energy demands of heavy industry and large-scale commercial facilities. Engineered for a 500A rated primary current, the CT305 utilizes induced current power technology to harvest energy directly from the testing conductor, eliminating the need for batteries or external power wiring. Its non-invasive split-core design facilitates rapid, safe installation without interrupting operations, providing a scalable path to high-fidelity energy analytics.

Core Capabilities

Energy-Harvesting Operates autonomously using induced current from Phase A, ensuring zero maintenance.
Advanced Sampling Features a high 3.3 kHz sampling frequency for precise RMS current tracking.
Thermal Monitoring Supports external NTC sensors to monitor cable temperatures from -20°C to 100°C.
Non-Invasive Split-Core Rapid clamp-on installation requires no electrical downtime or rewiring.

Energy Management Use Cases

• Industrial Machine Health: Detect anomalies in motor current to prevent catastrophic machine failures.
• Smart Building Sub-metering: High-precision phase monitoring for accurate departmental energy allocation.
• Load Profiling: Identify peak usage patterns in HVAC and large utility systems to optimize consumption.

Technical Integration

The CT305 is fully compliant with LoRaWAN® Class A and supports global frequency bands. It features Over-the-Air Firmware Updates (FUOTA) and is equipped with a status/alarm LED for field diagnostics. When harvesting power from Phase A, the unit requires a minimum reporting current (30A at 1min intervals or 19A at 10min intervals). For lower current measurement or initial configuration, the device can be powered via its USB Type-C port. For professional system architecture support, contact the ShopIoT engineering team.

Specifications
  • Primary Communication Protocol
    LoRaWAN
  • Frequency/Region
    EU868
  • Antenna Type
    External (SMA)
  • LoRaWAN Class
    Class A
  • Radio & Range

    TX power: 16 dBm (EU868)

    Sensitivity: -137 dBm

  • Configuration Method
    NFC, USB
  • Activation Method
    OTAA, ABP
  • Monitoring Parameters
    Current (A), Accumulated Current, Cable Temperature
  • Measurement Technology

    Current: split-core clamp current transformer (rated secondary 150 mArms, 3.3 kHz sampling)

    Temperature: NTC

  • Measurement Range

    Current: rated primary current 500 Arms (per CT)

    Minimum reporting current (self-powered): 5 Arms (1-min interval) / 4.5 Arms (10-min interval)

    Temperature (NTC): -20°C to +100°C

    Working frequency: 50–60 Hz

    Wire aperture: Ø36.5 mm

  • Measurement Accuracy

    Current: ±1%

    Temperature: ±1%

  • Measurement Resolution

    Current: 1 mA

  • Power Source
    Self-powered (from measured line), USB
  • Power Input
    Self-powered by induced current from the measured conductor (phase A wire only); needs at least the minimum reporting current. 5 V via USB Type-C for lower currents. No battery.
  • Dimensions
    Transceiver 38 × 34.5 × 16 mm; CT clamp 68 × 86 × 41.8 mm
  • Weight
    Transceiver 13.05 g; CT clamp 276.75 g
  • Enclosure Material
    PC (Polycarbonate)
  • Mounting Options
    Clamp-on (CT)
  • IP Rating
    IP30
  • Environment Rating
    Indoor
  • Operating Temperature
    -20°C to +70°C
  • Certifications
    CE, FCC
  • Warranty
    2 Years

Document Library

CT305 Datasheet

CT305 User Manual

Payment & Security

Payment methods

  • American Express
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  • Maestro
  • Mastercard
  • MB WAY
  • MobilePay
  • PayPal
  • Satispay
  • Shop Pay
  • Union Pay
  • Visa

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