Susan L Walker

Address:

540 Ml St, Excelsior, MN 55331

VIN:

JHLRE48367C050878

Make:

HONDA

Model:

CR-V

Year:

2007

US Patent:

7788055, Aug 31, 2010

Filed:

Jul 2, 2007

Appl. No.:

11/824652

Inventors:

Susan Jean Walker Colsch - Shellsburg IA, US
William Davison - Cedar Rapids IA, US
David Joseph Dunne - Cedar Rapids IA, US
Kevin John Malo - Iowa City IA, US
Steve M. Meehleder - Cedar Rapids IA, US
Ryan James Moffitt - Coralville IA, US
Gary Michael Stumme - Cedar Rapids IA, US

Assignee:

Square D Company - Palatine IL

International Classification:

G01D 18/00
G01D 21/00
G01M 19/00
G01P 21/00
G01R 35/00

US Classification:

702 85

Abstract:

A method and system to calibrate a motor circuit protection device is disclosed. An example method calibrates a signal chain of a circuit breaker. The signal chain includes a current transformer, a burden resistor, a stored energy circuit and a controller. The circuit breaker includes a memory coupled to the controller. A calibration instruction routine is written in a first location of the memory. A test current is injected in the circuit breaker signal chain. The test current peak of the test current in the circuit breaker signal chain is measured. Data indicative of the test current peak is stored in a second location of the memory. The test current peak data is read from the second location of the memory. The test current peak data is compared with nominal current data related to the signal chain remotely from the circuit breaker. A calibration factor is determined based on the comparison.

US Patent:

7869170, Jan 11, 2011

Filed:

Jul 2, 2007

Appl. No.:

11/824654

Inventors:

Susan Jean Walker Colsch - Shellsburg IA, US
William Davison - Cedar Rapids IA, US
Kevin John Malo - Iowa City IA, US
Steve M. Meehleder - Cedar Rapids IA, US

International Classification:

H02H 3/00

US Classification:

361 42

Abstract:

A time-synchronized trip implementation for a motor circuit protector (MCP) having a reconfigurable microcontroller. The microcontroller causes a power supply to, be charged for an initial time period during a charging mode. An onboard comparator is configured for a predetermined self-protection level of the MCP, and fault currents that exceed the comparator's threshold will directly drive a solenoid to trip the MCP. The microcontroller reconfigures the comparator's threshold to both measure and charge the power supply toward a stored energy trip voltage, which will charge quickly when high fault currents are present. As a result, self-protection is not compromised. After the trip voltage is reached, the microcontroller reconfigures the onboard comparator's threshold for self-protection trip levels. When a trip event occurs in this mode, stored energy trip activation occurs. The MCP includes user-selectable trip settings, and the microcontroller reconfigures the comparator threshold levels for user-selectable self-protection levels.

US Patent:

8154373, Apr 10, 2012

Filed:

Jun 15, 2007

Appl. No.:

11/818679

Inventors:

Susan Jean Walker Colsch - Shellsburg IA, US
David Joseph Dunne - Cedar Rapids IA, US
Kevin John Malo - Iowa City IA, US

Assignee:

Schneider Electric USA, Inc. - Palatine IL

International Classification:

H01F 17/06
H01F 38/20
H01F 27/24

US Classification:

336178, 336173, 336212, 336234

Abstract:

In a circuit breaker, a current transformer for fault powering trip unit electronics and sensing low currents and high currents includes a core with solid laminations and gapped laminations to sense a wide range of currents from locked-rotor currents to high, instantaneous short-circuit currents in a single current transformer. The current transformer can also fault power trip unit electronics without requiring an additional current transformer. The operating range of the circuit breaker is significantly enhanced compared to existing breakers that can sense only a limited range of current levels.