Electrical

GFCI Receptacle Detection Architecture

Electrical Diagrams · made in Skemio

GFCI circuit diagram showing Hot and Neutral passing through a toroidal transformer, sense amplifier, SCR gate, solenoid trip, and contacts.
GFCI circuit diagram showing Hot and Neutral passing through a toroidal transformer, sense amplifier, SCR gate, solenoid trip, and contacts.
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What it shows

  • Hot and neutral conductors pass through one differential toroidal core.
  • Equal opposing currents cancel out magnetic flux inside the core.
  • A 4-6mA differential induces a coil voltage that trips the latch in 25ms.

The takeaway

Current in must equal current out; any 5mA deficit trips the circuit in 25ms.

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