Circuit breaker device with primary winding turns in opposing directions

A system, comprising:

• a power source;
• a circuit breaker device, comprising:
• a power input coupled to the power source,
• a current sense transformer, comprising:
• a core;
• a secondary winding comprising a first wire wrapped around the core a number of secondary winding turns;
• and
• a primary winding coupled to the power input, the primary winding comprising a second wire wrapped around the core a number of primary winding turns, wherein the number of primary winding turns comprises a first number of primary winding turns in a first direction and a second number of primary winding turns in an opposite direction that magnetically cancel out the second number of primary winding turns in the first direction to generate an effective number of primary winding turns, wherein the effective number of primary winding turns and the number of secondary winding turns comprise a desired turns ratio, and
• an output;
• an actuator circuit coupled to the secondary winding, the actuator circuit comprising an actuator that trips the circuit breaker device based on sensing a current spike that exceeds a threshold;
• and
• a load coupled to the output of the circuit breaker device.

A method of configuring a circuit breaker device, comprising:

• determining a desired turns ratio for a current sense transformer;
• setting a number of secondary winding turns for a secondary winding of the current sense transformer;
• calculating a length and a gauge of a wire for a primary winding of the current sense transformer, wherein calculating the length and gauge of the wire comprises calculating the length and the gauge so that a thermal dissipation of the wire is distributed over the length of the wire to limit a temperature of the circuit breaker device below a threshold temperature;
• and
• wrapping the wire for the primary winding of the current sense transformer around a core of the current sense transformer a first number of primary winding turns in a first direction and a second number of primary winding turns in an opposite direction that magnetically cancel out the second number of primary winding turns in the first direction to generate an effective number of primary winding turns, wherein the effective number of primary winding turns and the number of secondary winding turns comprise the desired turns ratio.