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Non-Invasive SCT-013 30A AC Sensor Split Core Current Transformer

Non-Invasive SCT-013 30A AC Sensor Split Core Current Transformer

₹388.00Price
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What It Is

  • A non'invasive current sensor that measures AC current up to 30A without cutting or interrupting the conductor.

  • Uses a split'core current transformer (CT) you just clip it around a single live (or neutral) conductor.

  • It outputs a small AC voltage or current proportional to the sensed AC current.

  • Ideal for energy monitoring, power measurement, load tracking, and safety systems.

 

How It Works

  • The SCT013 is a current transformer: The primary winding is simply the conductor passing through the sensor's core. The secondary winding is the internal coil around the magnetic core.

  • When AC flows through the primary conductor, an equivalent currprimary current.

  • This induced current is converted to a voltage across a burden resistor for measurement.

  • Because it's non'invasive, you never connect directly to mains the sensor magnetically senses the current.

 

Key Features

Split'Core Design: Clip'on installation no need to disconnect wires. Rated Current: Up to 30A AC RMS. Output Type: AC signal proportional to current. Burden Resistor: Many versions include a built'in resistor so the sensor outputs voltage (e.g., 1V or 01V RMS). Frequency: Designed for 50Hz/60Hz mains. Isolation: Galvanic isolation rrin enclosures, panels, or behind DIN rails.

Typical Electrical Specifications

Specification

Typical Value

Primary Current Range

030A AC RMS

Output

AC voltage (via internal/external burden resistor)

Burden Resistor (Typical)

~33 100 (depending on model; defines output voltage)

Core Type

Ferrite or similar magnetic core

Accuracy

~13% (varies by manufacturer, load, and current range)

Operating Frequency

~4565Hz (standard mains)

Insulation

Galvanic isolation between sensor and mains

Output Range (Example)

  • The CT itself produces an AC signal proportional to the sensed current.

  • If the module has a built'in burden resistor, the output is a voltage that microcontroller ADCs can read (after offset).

  • Without a burden resistor, you'll need to add one externally and then measure the resulting voltage.

  • Because the output crosses zero and is AC, you need to bias the signal to mid'supply (e.g., VCC/2) before feeding to an ADC.

 

Typical Connections

  • Clip Sensor Around Live or Neutral Wire do not include both conductors (that cancels the measurement).

  • Burden Resistor if external, connect across the sensor leads.

  • Signal Conditioning bias the AC waveform (e.g., using a voltage divider and capacitor) so it's centered at mid'ADC voltage.

  • Microcontroller ADC read the biased waveform and use code to calculate RMS.

 

Practical Use & Measurements

  • RMS Current Calculation: Sample the AC waveform at high speed (e.g., 14kHz sample rate), remove bias, and compute RMS value.

  • Power Measurement: Combine current measurement with synchronized voltage measurement to compute real power.

  • Energy Monitoring: Integrate real power over time to get energy (e.g., kWh).

  • Load Profiling: Detect on/off cycling and load variations.

 

Important Safety Notes

Do Not Open Mains Wiring: Although non'invasive, the sensor clips around a live conductor. Make sure insulation is intact and avoid contact with bare wires.

Grounding & Isolation: The sensor output is isolated; keep signal conditioning and microcontroller circuits properly referenced.

Signal Biasing: Because it's AC, you must bias the sensor signal for microcontroller ADC reading.

Avoid Clipping Both Wires: Only clip around one conductor (live or neutral). Clipping both cancels the measurement.

Typical Applications

  • Household Energy Monitoring (DIY smart meters).

  • Solar Inverter Current Sensing.

  • Industrial Load Monitoring & Control.

  • Overload & Fault Detection Systems.

  • Embedded Microcontroller Projects with Power Tracking.

 

Summary

  • Type: Split'core AC current transformer (non'invasS.

  • Output: AC waveform proportional to current (often with built'in voltage output via burden resistor).

  • Interface: Requires biasing and ADC sampling to extract RMS current.

  • Use Case: Energy monitoring and current measurement without breaking mains circuit.

 

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