IP Library Granted Patent US 7,499,250
Granted Patent B2
US 7,499,250 · App. 11/379,319 · Granted Mar 3, 2009

Systems, devices, and methods for temperature compensation in arc fault detection systems

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Quick Facts
Patent No.
US 7,499,250
App. No.
11/379,319
Granted
Mar 3, 2009
Kind
B2
Abstract

Certain exemplary embodiments comprise a method, which can comprise configuring a system to compare an electrical value and a selected pre-stored threshold value of a plurality of pre-stored threshold values. The method can comprise configuring the system to modify the plurality of pre-stored threshold values based upon a predetermined change in measured temperature.

Claims (46)

1. A method comprising:

configuring a system to compare an electrical value and a selected pre-stored threshold value of a plurality of pre-stored threshold values, said electrical value related to a measurement provided by a sensor associated with an arc fault detection system; and

configuring said system to trip a protective device in an electrical circuit responsive to a detected arc fault, said arc fault detected based upon said plurality of pre-stored threshold values, said plurality of pre-stored threshold values automatically modified responsive to a predetermined change in measured temperature, said system adapted to sample said measured temperature at a lower rate than a sampling rate of said electrical measurement.

2. The method of claim 1 , further comprising:

configuring said system to select said selected pre-stored threshold value from said plurality of pre-stored threshold values based upon said measurement provided by said sensor and said measured temperature.

3. The method of claim 1 , further comprising:

configuring said system to obtain said measurement provided by said sensor via a resistive sensor.

4. The method of claim 1 , further comprising:

configuring said system to obtain said measurement provided by said sensor via a current transformer.

5. The method of claim 1 , further comprising:

configuring said system to obtain said measurement provided by said sensor via a Rogowski coil.

6. The method of claim 1 , further comprising:

configuring said system to obtain said measured temperature via an on-chip temperature sensor.

7. The method of claim 1 , further comprising:

configuring said system to convert said measured temperature from an analog signal to a digital signal.

8. The method of claim 1 , further comprising:

configuring said system to sample a waveform to determine said electrical value.

9. The method of claim 1 , further comprising:

configuring said system to send said electrical value to an information device.

10. The method of claim 1 , further comprising:

configuring said system to determine said plurality of pre-stored threshold values.

11. The method of claim 1 , further comprising:

configuring said system to determine said plurality of pre-stored threshold values after a delay time to allow for self-heating of said sensor.

12. The method of claim 1 , further comprising:

configuring said system to determine said plurality of pre-stored threshold values responsive to a sensed temperature, said sensed temperature processed via a method comprising an analog to digital conversion.

13. The method of claim 1 , further comprising:

configuring said system to determine said plurality of pre-stored threshold values responsive to a sensed temperature processed via a method comprising an analog to digital conversion performed via an information device.

14. The method of claim 1 , further comprising:

configuring said system to sample said temperature measurement at said lower rate based upon a microprocessor pin voltage.

15. The method of claim 1 , further comprising:

configuring said system to select said plurality of pre-stored threshold values based upon said measured temperature, wherein said plurality of pre-stored threshold values is a first plurality of pre-stored threshold values, said system adapted to store a second plurality of pry-stored threshold values selectable by said system.

16. A system comprising:

an information device configured to automatically compare an electrical value and a selected pre-stored threshold value of a plurality of pre-stored threshold values, said electrical value related to a measurement provided by a sensor associated with an arc fault detection system, said information device configured to trip a protective device in an electrical circuit responsive to a detected arc fault, said arc fault detected based upon said plurality of pre-stored threshold values, said plurality of pre-stored threshold values automatically modified responsive to a predetermined change in measured temperature, said measured temperature sampled at a lower rate than a sampling rate of said electrical measurement.

17. The system of claim 16 , further comprising:

a memory device configured to store said plurality of pre-stored threshold values, said information device communicatively coupled to said memory device.

18. The system of claim 16 , further comprising:

said sensor.

19. A machine readable medium comprising instructions for:

configuring a system to compare an electrical value and a selected pre-stored threshold value of a plurality of pre-stored threshold values, said electrical value related to a measurement provided by a sensor associated with an arc fault detection system; and

configuring said system to trip a protective device in an electrical circuit responsive to a detected arc fault, said arc fault detected based upon said plurality of pre-stored threshold values, said plurality of pre-stored threshold values automatically modified responsive to a predetermined change in measured temperature, said system adapted to sample said measured temperature at a lower rate than a sampling rate of said electrical measurement.

20. A method comprising:

providing a first electromagnetic signal adapted to configure a system to compare an electrical value and a selected pre-stored threshold value of a plurality of prestored threshold values, said electrical value related to a measurement provided by a sensor associated with an arc fault detection system; and

providing a second electromagnetic signal adapted to configure said system to trip a protective device in an electrical circuit responsive to a detected arc fault, said arc fault detected based upon said plurality of pre-stored threshold values, said plurality of pre-stored threshold values automatically modified responsive to a predetermined change in measured temperature, said system adapted to sample said measured temperature at a lower rate than a sampling rate of said electrical measurement.

21. An apparatus having

an information device configured to provide a first set of machine-readable instructions adapted to configure a system to compare an electrical value and a selected pre-stored threshold value of a plurality of pre-stored threshold values, said electrical value related m a measurement provided by a sensor associated with an arc fault detection system; and

provide a second set of machine-readable instructions adapted to configure said system to trip a protective device in an electrical circuit responsive to a detected arc fault, the arc fault detected based upon said plurality of pre-stored threshold value, said plurality of pre-stored threshold values automatically modified responsive to predetermined change in measured temperature, said system adapted to sample said measured temperature at a lower rate than a sampling rate of said electrical measurement.

Assignments (2)
MERGER Recorded May 18, 2010
From: SIEMENS ENERGY AND AUTOMATION AND SIEMENS BUILDING TECHNOLOGIES, INC.
To: SIEMENS INDUSTRY, INC.
Reel/Frame 024411/0223 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 19, 2006
From: ZHANG, BIN
To: SIEMENS ENERGY & AUTOMATION, INC.
Reel/Frame 017496/0746 →