Test pulses for enabling revenue testable panel meters

• US 7,683,605 B2
• Filed: 03/11/2009
• Issued: 03/23/2010
• Est. Priority Date: 10/20/2004
• Status: Expired due to Fees

• Current Assignee: Electro Industries/Gaugetech
• Original Assignee: Electro Industries/Gaugetech
• Inventors: Kagan, Erran, Banhegyesi, Tibor
• Primary Examiner(s): Nguyen; Ha Tran T
• Assistant Examiner(s): Vazquez; Arleen M
• Application Number:
  US12/401,791
• Publication Number:
  US 20090212764A1
• Time in Patent Office: 377 Days
• Field of Search: 324/74, 324/142, 324/134, 324/76.11, 702/60, 702/61, 361/659
• US Class Current: 324/142
• CPC Class Codes: G01R 35/04 of instruments for measuring time integral of power or current

Abstract

A panel meter including an energy test pulse device that enables the panel meter to be used for revenue applications and eliminates the need for two separate meters, one for panel indication, and the other for energy and revenue applications. The electrical panel meter including at least one sensor configured for measuring an electrical parameter; at least one analog-to-digital converter coupled to the at least one sensor for converting the measured electrical parameter to a digital signal; a display for continuously displaying at least one electrical parameter; a processor configured to receive the digital signal and calculate an amount of energy consumed; and a test pulse circuit configured to receive the calculated amount and generate a plurality of pulses equal to the calculated amount, wherein each of the plurality of pulses is equal to a predetermined amount of energy.

Claims

1. An electrical panel metering device comprising:

a housing including a front face panel configured to facilitate mounting of the panel metering device in a cut-out of an electrical panel;

at least one sensor configured for measuring an electrical parameter;

at least one analog-to-digital converter coupled to the at least one sensor for converting the measured electrical parameter to a digital signal;

a display disposed on the front face panel of the housing for continuously displaying at least one electrical parameter;

at least one processor configured to receive the digital signal, calculate an amount of energy consumed for revenue metering and generate a plurality of pulses signal indicative of the amount of energy consumed; and

a test pulse circuit configured to receive the plurality of pulses from the at least one processor, wherein the test pulse circuit includes an LED disposed on the front face panel of the housing to generate a subsequent plurality of pulses from the received plurality of pulses for verifying the accuracy of the panel metering device with an external reference standard device.

2. The panel metering device of claim 1, wherein the at least one analog-to digital converter has 24 bit resolution.

3. The panel metering device of claim 1, wherein the at least one analog-to-digital converter has a sampling rate of at least 400 samples per cycle.

4. The panel metering device of claim 1, wherein the test pulse circuit further comprises a divider for receiving the plurality of pulses from the at least one processor, generating the subsequent plurality of pulses and transmitting the subsequent plurality of pulses to the LED wherein said divider slows said plurality of pulses'"'"' rate to accommodate testing by conventional testing equipment.

5. The panel metering device of claim 1, wherein the at least one analog-to-digital converter, the processor, and the test pulse circuit are disposed on a single printed circuit board.

6. The panel metering device of claim 1, wherein the display is configured to continuously and simultaneously display at least three electrical parameters.

7. The panel metering device of claim 1, wherein the display further comprising a % load bar display.

8. The panel metering device of claim 1, wherein the display is a touch screen.

9. The panel metering device of claim 1, wherein the display is a liquid crystal display (LCD).

10. The panel metering device of claim 9, wherein the display provides visual indications in the form of videos.

11. The panel metering device of claim 1, furthering comprising audible producing means for alerting of alarms.

12. The panel metering device of claim 1, further comprising a communication device for enabling communications to other meters and at least one computing device via at least one communication protocol.

13. The panel metering device of claim 12, wherein the at least one communication protocol is Modbus, Modbus RTU or DNP.

14. The panel metering device of claim 1, wherein the panel metering device is configured to wirelessly communicate to a computing device.

15. The panel metering device of claim 14, wherein the wireless communication is performed by a port located on the meter.

16. The panel metering device of claim 15, wherein the optical port operates according to at least one IrDA protocol.

17. The panel metering device of claim 1, wherein the housing is configured to be mounted in a DIN 92 mm square cut-out.

18. The panel metering device of claim 1, wherein the housing is configured to be mounted in a ANSI C39.1 round cut-out.

19. The panel metering device of claim 1, wherein each of the plurality of pulses is equal to a predetermined number of Watthours per pulse.

20. The panel metering device of claim 19, wherein the predetermined number of Watthours per pulse is adjustable from the front face panel.

21. The panel metering device of claim 1, wherein the LED emits light in a spectrum other than the visible light spectrum.