Liebert Corporation

Stephen A Mowrer

Robert W Baker

John F Stack

A climate control system or a data center includes a computer room air conditioner (CRAC) and an air economizer. A control module determines whether outside air is suitable for use in cooling the data. If the outside air is suitable for use, outside air and not the CRAC is used to cool the data center when the dry bulb temperature of the outside air is below a minimum set point. The outside air is conditioned before it is introduced as supply air so that it is above a minimum temperature. If the outside air is suitable for use and the dry bulb temperature of the outside air is above the set point, the control module determines a cooling percentage of cooling of the data center to be provided by the CRAC and a cooling percentage to be provided by the outside air.

Climate control system for data centers

The present invention provides an electrical circuit that measures the ground current due to insulation leakage in electrical heating elements. The circuit uses a CT to measure the current being supplied to at least one of a plurality of electrical heating elements. Using a comparator circuit and noise rejection circuitry to prevent erroneous tripping, once the current reaches a predetermined threshold, a signal is sent to a switch that causes a non-volatile memory device to clear thereby de-energizing the coil of the contactor that provides power to at least one of the heating elements.

Growing community of inventors

Lewis Center, OH, United States of America

Stephen A Mowrer