Eaton Corporation

Eaton Intelligent Power Limited

Shifang Zhang

Lin Yang

Tao Xiong

Haidong Harry Zhang

Lili Lily Du

Xianzhen Zhang

Ahmed El-Gayyar

Lili Du

A system for controlling delivery of power to a load includes a master control unit (MCU) and a synchronous solid-state relay. The MCU causes the relay to close when the voltage delivered to the relay is at a zero crossing state. The MCU causes the relay to open at either (a) the moment when the voltage delivered to the relay is at a zero crossing state, or (b) the moment that the current delivered to the relay is both over a threshold level and at a zero crossing state.

Switch with current and voltage collection

A system for delivering power to a load includes a master control unit (MCU) communicatively connected to a wireless network. A remote control circuit is electrically connected to the MCU. The remote control unit delivers a signal of a first voltage to the MCU when the remote control unit is not receiving a command signal from a remote controller, and deliver a signal of a second voltage to the MCU when the remote control unit is receiving a command signal from the remote controller. A relay unit is electrically connected to the load and to an output of the MCU. The MCU is programmed to selectively power the load by selectively passing control signals to the relay unit in response to commands received from the wireless network. When no signals are received from the wireless network, the remote control circuit may control the load, either directly or via the MCU.

Wireless switch with three-way control

An audible ground fault detection device may include: a pulse-width modulation (PWM) circuit to produce a pulse signal in response to an occurrence of a ground fault; and a buzzer circuit to emit an audible sound in response to receipt of the pulse signal. The device may include a power circuit configured to transfer power from the power line to the PWM circuit when a ground fault occurs in a load of the power line, and not to transfer the power from the power line to the PWM circuit when no ground fault occurs in any load of the power line. When the PWM circuit has no power, it will not produce the pulse signal. The power circuit may also provide DC power to the buzzer circuit in response to the occurrence of the ground fault. The buzzer circuit may include a passive buzzer.

Audible ground fault buzzer circuit

Connection device

Growing community of inventors

Shanghai, China

Shifang Zhang