Rockwell Automation Technologies Incorporated

Allen-bradley Company, LLC

David T Rollay

David Lee Jensen

Michael Lee Gasperi

Chester Malkowski

Rachel M Bugaris

Jerome Charles Lange

David Dale Brandt

Jie Shen

Neil Gollhardt

Arnaldo Hiroyuki Omoto

G Erich Heberlein, Jr

Herberto Bergmann

Fahed Hasan Awad

Lawrence A Burton

Sandra J Tietyen

Walter J Lukitsch

Electrical enclosures are provided that include arc resistant features designed to add structural strength for arc containment, to inhibit arc propagation, and/or to direct the release of pressure within and/or from the enclosure in order to provide arc resistant electrical enclosures. In general, the arc resistant features may be designed to provide enclosures where in the event of an arc fault, the doors and covers remain closed, parts are not ejected from the enclosure, holes are not produced in the enclosure, indicators located in close proximity to the enclosure do not ignite, and/or grounding connections remain effective. Further, the foregoing features may be designed to provide electrical enclosures that comply with industry guides and standards for arc resistant ratings.

Arc resistant electrical enclosure

A method and apparatus is disclosed for determining power line parameter of a system. Specifically, there is provided a system for determining comprising a networked device including a voltage perturbation circuit coupled to a voltage source and configured to perturb the waveform of the voltage source, and a voltage measurement circuit coupled to the voltage source and configured to transmit voltage measurements of the waveform over a network and a remote monitoring unit, coupled to the network, and configured to receive the voltage measurements over the network and to calculate an incident energy using the voltage measurements.

Networked power line parameter analysis method and system

A system, in one embodiment, includes a power distribution center having an enclosure with an access door configured to move between a closed position and an open position. The power distribution center includes a non-contact sensor disposed inside the enclosure, wherein the non-contact sensor includes a non-contact voltage sensor, or a non-contact temperature sensor, or a combination thereof. The power distribution center also includes an indicator viewable outside of the enclosure while the door is in the closed position, wherein the indicator is coupled to the non-contact sensor.

System and method for monitoring a motor control center

A method and apparatus is disclosed for determining the incident energy of a system. Specifically, there is provided a technique comprising measuring a voltage of an ac waveform, causing a resonant ring in the ac waveform, measuring a frequency of the resonant ring, computing a line impedance based upon the measured voltage and the frequency of the resonant ring, and computing a bolted fault current based on the line impedance and the measured voltage.

Power line parameter analysis method and system

A connector arrangement for packaged electrical systems, such as motor control centers includes a component connector assembly mounted to component supports for providing network signals and control power to components on the support. A mating prewired connector assembly in the enclosure is forced to mate with the component connector assembly when the component support is fully engaged within the enclosure. Thereafter, the component support may be partially withdrawn from the enclosure to disconnect main power from the component support, while leaving network connections and control power connections by virtue of the mated connectors. The connectors engage by non-sliding contact both when fully engaged and when the components are partially withdrawn from the enclosure.

Electrical system having withdrawable unit with maintained control and communication connection

A method and apparatus is disclosed for determining the power line parameters of a system. Specifically, there is provided a method comprising perturbing a voltage waveform through a first connection, measuring a characteristic of the perturbation through a second connection, and calculating a line impedance based on the characteristic of the perturbation.

Dual connection power line parameter analysis method and system

A system operable to detect voltages within an electrical device and provide an output based on the voltages detected by the system. The electrical device may include an isolation switch adapted to selectively isolate the electrical device from an electrical bus. The system may be operable to detect voltage data in the electrical bus and the electrical device downstream of the isolation switch. The system may provide an indication that voltage is detected in the electrical bus, but that no hazardous voltages are detected within the electrical device downstream of the isolation switch. The system may be adapted to produce a plurality of outputs based on the voltage data detected on the electrical bus and in the electrical device downstream of the isolation switch.

Method and system for verifying voltage in an electrical system

A motor heating control for retrofit applications has an enclosure with power supply terminals and motor heating output terminals. Inside an upper compartment is a first two-pole isolating switch which couples power from the supply terminals through a step-down transformer and a rectifier to one side of a motor heating contactor in the lower compartment. The other side of the motor heater contactor is coupled through fuses and a second two-pole isolating switch in the lower compartment to the motor heating output terminals. An operating handle outside the lower compartment is mechanically interlocked to both isolating switches so that the door of the enclosure cannot be opened without disconnecting both the motor heating power source and the electrical motor from the motor heating control. The motor heating contactor is also electromechanically interlocked to the door interlock mechanism so that the operating handle cannot be moved to its open position until the motor heating contacts are opened. When the motor heating contacts are closed, current will be supplied to at least one motor winding to maintain a temperature of 5.degree.-10.degree. F. above the ambient and prevent condensation in the windings of a motor.

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Franklin, WI, United States of America

David T Rollay