Abstract: An operation detection device for an overcurrent protection component is provided. The overcurrent protection component has a closed state and an open state and outputs a transition event responsive to a transition between the closed state and the open state. The operation detection device includes a housing configured to attach to the overcurrent protection component. A sensor is positioned in the housing at a location selected to allow the sensor to detect the transition event. A switch circuit is operatively coupled to the sensor and is configured to generate an output signal indicating a change in state of the overcurrent protection component responsive to detection of the transition event by the sensor.

Abstract: An operation detection device for an overcurrent protection component that detects a transition event between a closed state and an open state of the protection component includes an event sensor positioned at a location selected to allow the event sensor to detect the transition event and a current sensor positioned at a location selected to detect a current passing through the overcurrent protection component and to generate a first output signal based on a level of the detected current. A switch circuit operatively coupled to the event sensor is configured to generate a second output signal indicating a change in state of the overcurrent protection component responsive to detection of the transition event by the event sensor.

Abstract: An operation detection device for an overcurrent protection component is provided. The overcurrent protection component has a closed state and an open state and outputs a transition event responsive to a transition between the closed state and the open state. The operation detection device includes a housing configured to attach to the overcurrent protection component. A sensor is positioned in the housing at a location selected to allow the sensor to detect the transition event. A switch circuit is operatively coupled to the sensor and is configured to generate an output signal indicating a change in state of the overcurrent protection component responsive to detection of the transition event by the sensor.

Abstract: An overvoltage protection assembly includes a rail and a mount device. The mount device includes a base member having front and rear opposed surfaces and a mounting structure on the rear surface. The mounting structure secures the base member to the rail. An overvoltage protection module is mounted on the front surface of the base member.

Abstract: An overvoltage protection assembly includes a rail and a mount device. The mount device includes a base member having front and rear opposed surfaces and a mounting structure on the rear surface. The mounting structure secures the base member to the rail. An overvoltage protection module is mounted on the front surface of the base member.

Abstract: An overvoltage protection device includes a housing including a first substantially planar electrical contact surface and a sidewall. The housing defines a cavity therein and has an opening in communication with the cavity. An electrode member of the device includes a second substantially planar electrical contact surface facing the first electrical contact surface and disposed within the cavity. A portion of the electrode member extends out of the cavity and through the opening. A wafer formed of varistor material and having first and second opposed, substantially planar wafer surfaces is positioned within the cavity and between the first and second electrical contact surfaces with the first and second wafer surfaces engaging the first and second electrical contact surfaces, respectively.

Abstract: The present invention relates to storage systems for computer data and relates particularly to diagnosis of errors and status monitoring of such a system. The invention provides a system for storing computer data in which different error messages are generated according to how many times a specified low-level error has occurred. In the particular embodiment, different combinations of error messages are generated according to how many times a particular low-level error has occurred.

Abstract: A controller of a storage system for computer data enables diagnosis of errors and status monitoring of the storage system. The controller is enabled to categorize errors according to severity and to analyze low-level errors so as to trigger a combination of high level error conditions.

Abstract: An overvoltage protection device includes a first electrode member having a first substantially planar contact surface and a second electrode member having a second substantially planar contact surface facing the first contact surface. A wafer formed of varistor material and having first and second opposed, substantially planar wafer surfaces is positioned between the first and second contact surfaces with the first and second wafer surfaces engaging the first and second contact surfaces, respectively. The contact surfaces may apply a load to the wafer surfaces. Preferably, the electrode members have a combined thermal mass which is substantially greater than a thermal mass of the wafer. The wafer may be formed by slicing a rod of varistor material. The device may include a housing including the first substantially planar contact surface and a sidewall, the housing defining a cavity within which the second electrode is disposed.