Abstract: The present invention provides a method for accurately determining the power usage on an unbalanced two phase electrical circuit having both two phase and single phase loads using a single current transformer (CT). The method includes a learning algorithm stored in a memory of a monitoring device, the algorithm configured to be implemented by a processor. The learning algorithm determines whether the CT is monitoring the conductor that supplies the single phase load and alerting the installer if it is not monitoring the conductor supplying the single phase load. Upon determining that the CT is monitoring the conductor that supplies the single phase load the learning algorithm will learn the characteristics of at least the single phase load and store the learned characteristic in a memory associated of the monitoring device.

Abstract: The present invention provides a method for accurately determining the power usage on an unbalanced two phase electrical circuit having both two phase and single phase loads using a single current transformer (CT). The method includes a learning algorithm stored in a memory of a monitoring device, the algorithm configured to be implemented by a processor. The learning algorithm determines whether the CT is monitoring the conductor that supplies the single phase load and alerting the installer if it is not monitoring the conductor supplying the single phase load. Upon determining that the CT is monitoring the conductor that supplies the single phase load the learning algorithm will learn the characteristics of at least the single phase load and store the learned characteristic in a memory associated of the monitoring device.

Abstract: A self-powered circuit interrupter arrangement for interrupting current in a circuit path uses a current-blocking component to ensure that an insufficient amount of accumulated power for actuating and completing interruption of the circuit path is not misused in an unwarranted attempt to interrupt the current path. The arrangement includes a current inducer circuit for providing a current signal having a magnitude corresponding to the current in the circuit path and a power supply operating from the current signal to provide a voltage signal of a predetermined value relative to common. A trip command circuit, in response to a fault detected in the circuit path, sends an electrical signal commanding that the circuit path be interrupted by using the voltage signal. The electrical signal is sent to an electrical latch located electrically in series with a coil of a solenoid mechanism.

Abstract: A circuit interrupter arrangement for interrupting current in a circuit path includes a hysteresis control circuit arranged to control a power supply charge-accumulation switch and an undervoltage trip-lockout circuit in parallel. More specifically, the arrangement includes a current inducer circuit for inducing a current signal having a magnitude corresponding to the current in the circuit path; an energy accumulator for accumulating a magnitude of energy to cause an interruption of the circuit path; an energy accumulator control circuit controlling the magnitude of energy accumulating; a trip lock-out circuit, responsive to an insufficient magnitude of accumulated energy, for preventing an interruption of the circuit path; and a range control circuit, responsive to the current inducer circuit, for operating a power-related signal between a first level and a second level to control the energy accumulator control circuit and the trip lock-out circuit.