COMBINED MEASURING AND DETECTION SYSTEM

• US 20130271116A1
• Filed: 06/13/2013
• Published: 10/17/2013
• Est. Priority Date: 12/15/2010
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: ABB Technology AG (ABB Limited)
• Inventors: Javora, Radek, Gemme, Carlo, De Natale, Gabriele Valentino
• Granted Patent: US 9,482,697 B2
• Time in Patent Office: Days
• US Class Current: 324/114
• CPC Class Codes: G01R 1/30 Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
• CPC Class Codes: G01R 31/1254 of gas-insulated power appliances or vacuum gaps testing switches G01R31/327; detecting electrical or mechanical defects in encased switchgear H02B13/065
• CPC Class Codes: G01R 31/3271 of high voltage or medium voltage devices G01R31/333 takes precedence

Abstract

A combined measuring and detection system is disclosed which includes an electronic evaluation unit for analyzing a broad frequency spectrum of measured quantities and one or more measuring devices for measurement of one or more of a magnetic field, an electric field, a current, and a voltage. The measuring devices are operatively connected to the electronic evaluation unit, which is provided with at least one frequency splitter dividing the measured quantities into a low frequency component and into a high frequency component. Low frequency components are used for measurement and protection analysis and high frequency components are used to detect partial discharges activity.

Claims

1. Combined measuring and detection system, comprising:

an electronic evaluation unit for analyzing a broad frequency spectrum of measured quantities; and

one or more measuring devices for measurement of one or more of a magnetic field, an electric field, a current, and a voltage, said one or more measuring devices being operatively connected to the electronic evaluation unit, wherein the electronic evaluation unit is provided with at least one frequency splitter dividing measured quantities into a low frequency component for a measurement and protection analysis and into a high frequency component for detection of partial discharges.

2. Combined measuring and detection system according to claim 1, comprising:

a magnetic field sensor, wherein said magnetic field sensor is a broadband sensor for measuring low and high-frequency components of the measured magnetic field.

3. Combined measuring and detection system according to claim 1, comprising:

an electric field sensor, wherein said electric field sensor is a broadband sensor for measuring low and high-frequency components of the measured electric field.

4. Combined measuring and detection system according to claim 2, comprising:

at least one additional sensor selected from a group consisting of;

a pressure sensor, an acoustic sensor, a humidity sensor, a temperature sensor, and a radio-frequency interference sensor, said at least one additional sensor being an external and/or internal part of said magnetic field sensor or said electric field sensor.

5. Combined measuring and detection system according to claim 1, wherein the measuring devices are single and separate devices.

6. Combined measuring and detection system according to claim 1, wherein the measuring devices are combined units containing more than one sensor in a single device.

7. Combined measuring and detection system according to claim 1, wherein the magnetic and/or electric field sensor is a single-phase device.

8. Combined measuring and detection system according to claim 1, wherein the magnetic and/or electric field sensor is a polyphase device

9. Combined measuring and detection system according to claim 4, wherein the one or more measuring devices are integrated into a single device.

10. Combined measuring and detection system according to claim 4, wherein at least some of the measuring devices are separate devices providing relevant signals to the electronic evaluation unit.

11. Combined measuring and detection system according to claim 1, comprising:

a supervisory system coupled to the electronic evaluation unit by wires and/or cables and/or wireless connection.

12. Combined measuring and detection system according to claim 1, wherein the combined measuring and detection system is integrated on board a circuit breaker.

13. A circuit breaker comprising:

circuit breaker contacts; and

a combined measuring and detection system according to claim 1.

14. An electrical switchgear comprising:

switchgear contacts; and

a combined measuring and detection system according to claim 1.

15. Combined measuring and detection system according to claim 2, comprising:

an electric field sensor, wherein said electric field sensor is a broadband sensor for measuring low and high-frequency components of the measured electric field.

16. Combined measuring and detection system according to claim 15, comprising:

at least one additional sensor selected from a group consisting of;

a pressure sensor, an acoustic sensor, a humidity sensor, a temperature sensor, and a radio-frequency interference sensor, said at least one additional sensor being an external and/or internal part of said magnetic field sensor or said electric field sensor.

17. Combined measuring and detection system according to claim 16, wherein the magnetic and/or electric field sensor is a single-phase device.

18. Combined measuring and detection system according to claim 16, wherein the magnetic and/or electric field sensor is a polyphase device