Security power interrupt

For interrupting power to an electrical appliance having a first load which draws a current below a preset current threshold and a second load which draws a current above the preset current threshold, a device comprising

• means for connecting the device to an electrical power supply,
• means for supplying electrical power to both the first load and the second load,
• switching means comprising a relay for closing an electrical connection between the means for connecting the device to an electrical power supply and the means for supplying electrical power,
• means including a current transformer for monitoring an electric current drawn by the appliance,
• means for comparing the electric current to the preset current threshold,
• means for switching the device between an interrupt mode and an operational mode responsive to entry of an authorization signal, and
• means including an electronic keypad for transmitting the authorization signal to the means for switching the device,
• whereby in the interrupt mode the device supplies power to the appliance to power the first load and when the second load is activated so that the current drawn by the appliance exceeds the current threshold the device interrupts power to the appliance.

For interrupting power to an electrical appliance having a first load which draws a current below a preset current threshold and a second load which draws a current above the preset current threshold, a device comprising

• an electrical plug for connecting the device to an electrical power supply,
• an electrical receptacle for connection to a power cord of the appliance, for supplying electrical power to both the first load and the second load,
• a relay for closing an electrical connection between the power supply and the receptacle,
• a current transformer transmitting a signal to a micro-processor for monitoring an electric current drawn by the appliance, the micro-processor including means for comparing the electric current to the preset current threshold and means for for switching the device between an interrupt mode and an operational mode responsive to entry of an authorization signal, and
• an electronic keypad for transmitting the authorization signal to the micro-processor,
• whereby in the operational mode the device supplies power to the appliance to power both the first load and the second load, and in the interrupt mode the device supplies power to the appliance to power the first load and interrupts power to the appliance when the second load is activated so that the current drawn by the appliance exceeds the current threshold.