Transformer current transducer CT10 series

clampACsplit-core

Overview
CT10x is a portable split-core clamp-on current transformer for non-intrusive single-conductor monitoring. It installs without de-energizing circuits, supports self-powered operation from induced current with USB Type-C fallback for power and configuration, and transmits energy and current data over LoRaWAN®. Available in 100 A / 250 A / 500 A model ranges for lighting, HVAC, motors and large feeders, CT10x is designed for retrofit electrical panels, distributed facilities and temporary measurements.

Key features

• Split-core clamp-on design for installation in crowded panels and placement of the wireless transceiver outside metal enclosures to improve RF coverage.
• Portable and reusable: reposition between circuits without rewiring or service interruption.
• Primary self-powered operation from the measured conductor; USB Type-C provides 5 V backup power and configuration/console access.
• Low startup/minimum reporting current to support low-load circuits (example: CT101 ~1.4–1.5 A under longer reporting intervals).
• High-sampling measurement (3.3 kHz) to capture transient spikes and dynamic loads.
• On-device cumulative ampere-hour reporting; kWh reporting available when nominal voltage and power factor are configured.
• Alerts: current threshold, over-current, temperature threshold and low-voltage for early detection of abnormal conditions.
• LoRaWAN® wireless transmission (OTAA/ABP Class A) with SMA antenna connector and multi-region frequency support.
• Built-in short-term energy storage to continue operation up to ~12 hours during temporary circuit outages.

Models / Options (summary)
CT101 — Rated current: 100 A; Wire hole: Φ16 mm; Typical applications: lighting, office equipment, small HVAC units and low-to-mid single-conductor circuits.
CT103 — Rated current: 250 A; Wire hole: Φ16 mm; Typical applications: commercial HVAC, compressors, mixed-load distribution panels.
CT105 — Rated current: 500 A; Wire hole: Φ36.5 mm; Typical applications: large motors, industrial feeders, chillers and high-current single-conductor loads.

Operational & integration highlights

• Non-intrusive installation: clamp-on measurement without de-energizing circuits for retrofit deployments.
• Self-powered with USB Type-C fallback: primary energy from conductor; USB used for configuration and console access.
• Wireless connectivity: LoRaWAN® protocol with SMA antenna; supports common regional bands and gateway ecosystems for cloud forwarding, MQTT, BMS/SCADA integration.
• Local calculation: on-device kWh calculation when nominal voltage and power factor are configured to reduce backend conversions.
• Fleet maintenance: supports FUOTA and bulk device management to minimize on-site service.

Applications & deployment examples

• Concert halls and public venues — circuit-level energy visibility without operational interruption; supports energy audits and sustainability reporting.
• Transport hubs and infrastructure — baseline energy monitoring and integration into digital twins/BMS via LoRaWAN gateways.
• Industrial facilities — per-machine current monitoring for efficiency benchmarking and early anomaly detection; installs without production shutdown.
• Educational campuses — distributed non-intrusive sub-metering across building panels for campus energy optimization.

Technical specifications

• Detection parameter: RMS current
• Sampling frequency: 3.3 kHz
• Working frequency: 50–60 Hz
• Rated primary currents (models): CT101 100 A; CT103 250 A; CT105 500 A
• Rated secondary currents: CT101 100 mA; CT103 125 mA; CT105 150 mA
• Minimum reporting current (powered by conductor): CT101 ~1.4–1.5 A; CT103 ~2.8–3.0 A; CT105 ~4.7–5.0 A (interval dependent)
• Accuracy: ±1% (> 5 A), ±3% (≤ 5 A)
• Resolution: 1 mA
• Temperature sensor: NTC, range -20 °C to 100 °C; accuracy ±1%
• Wireless protocol: LoRaWAN® (OTAA/ABP Class A)
• Antenna: 1 × 50 Ω SMA connector (center pin: SMA female)
• Supported regions: CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1/2/3/4
• Tx power: up to 16 dBm (868 MHz) / 22 dBm (915 MHz) / 19 dBm (470 MHz)
• Sensitivity: down to approx. -137 dBm
• Interfaces: USB Type-C (power/config/console), 1 × reboot button, 1 × status/alarm LED
• Advanced features: threshold alarm, overrange alarm, FUOTA
• Power: induced current from conductor or 5 V via USB Type-C
• Insulation voltage: 2.5 kVac (r.m.s.)
• Material/color: Blue, PBT+PC (UL94 V0)
• Extension cable: 1 m (standard)
• Operating temperature: -20 °C to 70 °C; storage -25 °C to 80 °C; RH ≤ 95% non-condensing
• Ingress protection: IP30 (indoor electrical panel use; transceiver can be placed outside enclosure)
• Example CT101 transceiver dimensions: 86.5 × 31 × 37.4 mm; wire hole Φ16 mm; weight ~85.65 g
• Approvals: CE, FCC, UL508