Peter E Sutherland

6456097, Sep 24, 2002

Dec 29, 1999

09/474821

Peter E. Sutherland - Voorheesville NY

General Electric Company - Schenectady NY

G01R 2708

324713, 324520, 324715, 324107, 324110, 324108

A method for measuring the impedance of electrical distribution equipment includes: applying a voltage at a first selected frequency to electrical distribution equipment, waiting a delay time for transient effects to settle, measuring current through the electrical distribution equipment, and selecting additional frequencies to repeat the steps of applying, waiting, and measuring. The method can be implemented, for example, by a meter which includes: a control processor connected to receive and execute instructions, and to output a control signal; a frequency generator for generating a frequency signal having a frequency determined by the control signal; a power amplifier connected to receive the control signal and the frequency signal, the power amplifier outputting a voltage signal to the electrical distribution system through a voltage transformer; and an analog-to-digital converter connected to receive analog feedback voltage signals from the voltage transformer, the analog-to-digital converter outputting a digital feedback voltage signal to the processor.

20040036461, Feb 26, 2004

Aug 22, 2002

10/225955

Peter Sutherland - Voorheesville NY, US

H01F017/00

323/355000

A method for operating an electrical apparatus includes mounting an instrument transformer proximate a load current carrying conductor, wherein the instrument transformer includes a current transformer for supplying an analog input signal proportional to a load current, the current transformer is coupled to a relay front-end module that includes a current-to-voltage converter circuit and is configured to couple to a remote protection module, converting the analog input signal to a digital input signal, transmitting the digital input signal to the remote protection module; and activating contacts to operate the electrical apparatus based on the digital input signals.

20110255199, Oct 20, 2011

Apr 16, 2010

12/761587

Peter Edward Sutherland - Voorheesville NY, US

GENERAL ELECTRIC COMPANY - Schenectady NY

H02H 7/04

361 38

Arc flash hazard reduction for transformer secondaries is provided. A current-limiting protection device such as a current-limiting fuse is located between the secondary windings of a transformer and switchgear having a main circuit breaker. Placing the current-limiting fuse between the secondary windings of the transformer and switchgear reduces arc flash hazard levels between the transformer and the switchgear.

20120026630, Feb 2, 2012

Jul 30, 2010

12/847383

Peter E. Sutherland - Voorheesville NY, US

H02H 7/04
H01F 41/00
H02M 11/00

361 35, 327103, 296021

An instrument transformer includes a current transformer configured to be coupled to a load, and to generate an analog signal that is proportional to a current flowing through the load. The instrument transformer also includes a protection module and a digitizer module that is coupled to the current transformer. The digitizer module is configured to receive an input signal that is proportional to the analog signal and to convert the input signal to a digital signal. The digitizer module includes a synchronization module for generating at least one timing signal and a fiber optic interface module coupled to the protection module and to the synchronization module for transmitting the digital signal to the protection module.

20120103659, May 3, 2012

Oct 28, 2010

12/914139

Peter Edward Sutherland - Voorheesville NY, US

GENERAL ELECTRIC COMPANY - Schenectady NY

H01B 12/02

1741251, 505230

In an embodiment, an apparatus including a cable is disclosed. The cable includes at least two conductors, each conductor comprising a high-temperature superconductor material, wherein a first conductor is concentric within a second conductor, and wherein the first conductor is tapered at a first end of the cable and the second conductor is tapered at a second end of the cable.