Device and method for acquiring electricity utilization information

A method for acquiring electricity utilization information, comprising:

• converting, by a non-isolated power supply, an AC power into a DC power to provide an appropriate operation voltage;
• detecting an operation parameter of a coupleable power supply circuit with the operation voltage;
• modulating, by a data communication module, the detected operation parameter onto a predetermined frequency, wherein the modulated operation parameter is transmitted with a predetermined data transmission rate, and the predetermined frequency is higher than the predetermined data transmission rate such that the transmitted operation parameter can be demodulated;
• and
• providing, by a passive magnetic coupling isolation component coupled to an output of the data communication module, both electrical isolation and signal transmission magnetic isolation to the data communication module for performing a magnetic coupling isolation for the modulated operation parameter.

A method for improving electrical safety, comprising:

• detecting an operation parameter of a coupleable power supply circuit using a method for acquiring electricity utilization information, the method comprising:
• converting an AC power into a DC power to provide an appropriate operation voltage;
• detecting an operation parameter of a coupleable power supply circuit with the operation voltage;
• modulating the detected operation parameter onto a predetermined frequency, wherein the modulated operation parameter is transmitted with a predetermined data transmission rate, and the predetermined frequency is higher than the predetermined data transmission rate such that the transmitted operation parameter can be demodulated;
• and
• providing electrical isolation and signal transmission magnetic isolation to perform a magnetic coupling isolation for the modulated operation parameter;
• obtaining a basic information on a state of said power supply circuit according to the detected operation parameter;
• obtaining an additional information on the state of said power supply circuit according to the detected operation parameter;
• and
• combining the basic information and the additional information to determine whether or not to generate a control signal or an alarm signal, wherein the control signal is configured to enable an electric leakage protector coupleably connected in said power supply circuit to disconnect said power supply circuit, and the alarm signal is configured to indicate that there is a potential electrical safety hazard in said power supply circuit.