FAULTED CIRCUIT INDICATOR WITH FAULT CHARACTERISTIC DETECTION & DISPLAY

• US 20090219163A1
• Filed: 02/27/2009
• Published: 09/03/2009
• Est. Priority Date: 02/29/2008
• Status: Active Grant

• Current Assignee: Schweitzer Engineering Laboratories, Incorporated
• Original Assignee: Schweitzer Engineering Laboratories, Incorporated
• Inventors: Feight, Laurence V.
• Granted Patent: US 8,159,360 B2
• Time in Patent Office: Days
• US Class Current: 340/635
• CPC Class Codes: G01R 1/22 Tong testers acting as secondary windings of current transformers
• CPC Class Codes: G01R 15/142 Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
• CPC Class Codes: G01R 19/14 Indicating direction of current; Indicating polarity of voltage
• CPC Class Codes: G01R 19/15 Indicating the presence of current

Abstract

A display for a faulted circuit indicator is disclosed. A plurality of light-emitting diodes is arranged so that at least two diodes are visible to a person approaching the faulted circuit indicator from a determined angle of approach. When a fault is detected, the faulted circuit indicator flashes the plurality of light-emitting diodes in a progression pattern to indicate the direction to the fault relative to the faulted circuit indicator.

Claims

1. A faulted circuit indicator comprising a housing, a current acquisition circuit disposed within the housing and adapted to monitor current within a power line, and a monitor circuit for determining when a fault has occurred on the power line, the monitor circuit in communication with the current acquisition circuit and disposed within the housing, the faulted circuit indicator further comprising:

i) a plurality of lamps coupled to the monitor circuit and disposed so that at least two lamps are visible from any determined angle of approach to the faulted circuit indicator as installed on the power line; and

ii) said monitor circuit driving the plurality of lamps in a first predetermined flashing pattern, the first predetermined flashing pattern indicating a direction to the fault relative to the faulted circuit indicator.

2. The faulted circuit indicator of claim 1 further comprising a clear end cap disposed on an end of the housing that faces downward relative to the power line when said faulted circuit indicator is installed, the plurality of lamps disposed within the clear end cap.

3. The faulted circuit indicator of claim 1 wherein the plurality of lamps comprise six light-emitting diodes, each light-emitting diode being disposed to face outward from the faulted circuit indicator, the plurality of light-emitting diodes divided into three sets, with a first set being disposed left-most, a second set being disposed centered, and a third set being disposed right-most.

4. The faulted circuit indicator of claim 1 wherein the monitor circuit includes a sensing coil wherein the polarity of voltage across the sensing coil when a fault is determined is indicative of a direction to the fault relative to the faulted circuit indicator, and wherein the monitor circuit is adapted to first drive the set of light-emitting diodes furthest from the fault.

5. The faulted circuit indicator of claim 1, wherein the first predetermined flashing pattern comprises a progression flashing pattern.

6. The faulted circuit indicator of claim 1, wherein the monitor circuit is further configured to drive the plurality of lamps in a second predetermined flashing pattern when the direction to the fault is not determined.

7. A faulted circuit indicator comprising a housing, a current acquisition circuit disposed within the housing and adapted to monitor current within a power line, and a monitor circuit for determining when a fault has occurred on the power line, the monitor circuit coupled to the current acquisition circuit and disposed within the housing, the faulted circuit indicator further comprising:

i) a rotatable display disposed on an end of the housing, the rotatable display adapted to rotate about an axis of the housing;

ii) a plurality of lamps coupled to said monitor circuit and disposed within said rotatable display;

iii) said rotatable display adapted to rotate so that at least two of said plurality of lamps are viewable from the determined angle of approach to the faulted circuit indicator;

iv) said monitor circuit driving the plurality of lamps in a first predetermined flashing pattern, the first predetermined flashing pattern indicating a direction to the fault relative to the faulted circuit indicator.

8. The faulted circuit indicator of claim 7 wherein said rotatable display includes a clear end cap that faces downward relative to the power line when said faulted circuit indicator is installed, the plurality of lamps disposed within said clear end cap.

9. The faulted circuit indicator of claim 7 wherein the plurality of lamps comprises three light-emitting diodes, each light-emitting diode disposed to face outward from the faulted circuit indicator and wherein a first light-emitting diode is disposed left-most, a second light-emitting diode is disposed centered, and a third light-emitting diode is disposed right-most.

10. The faulted circuit indicator of claim 7 wherein the monitor circuit includes a sensing coil wherein the polarity of voltage across the sensing coil when a fault is determined is indicative of a direction to the fault relative to the faulted circuit indicator, and wherein the monitor circuit is adapted to first drive the light-emitting diode furthest from the fault.

11. The faulted circuit indicator of claim 7, wherein the first predetermined flashing pattern is a progression flashing pattern.

12. The faulted circuit indicator of claim 7, wherein the monitor circuit is configured to drive the plurality of lamps in a second predetermined flashing pattern when the direction to the fault is not determined.

13. The faulted circuit indicator of claim 7, wherein the plurality of lamps are disposed so as to not be visible from a predetermined angle to the faulted circuit indicator as installed on the power line.