Combined measuring and detection system

• US 9,482,697 B2
• Filed: 06/13/2013
• Issued: 11/01/2016
• Est. Priority Date: 12/15/2010
• Status: Active Grant

• Current Assignee: ABB Schweiz AG (ABB Limited)
• Original Assignee: ABB Schweiz AG (ABB Limited)
• Inventors: Javora, Radek, Gemme, Carlo, De Natale, Gabriele Valentino
• Primary Examiner(s): Tang, Minh N
• Assistant Examiner(s): Frederiksen, David
• Application Number:
  US13/916,636
• Publication Number:
  US 20130271116A1
• Time in Patent Office: 1,237 Days
• US Class Current: 1/1
• 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, the electronic evaluation unit comprising at least one frequency splitter for dividing the measured quantities into a low frequency component for a measurement and protection analysis and into a high frequency component for detection of partial discharges;

a magnetic field sensor for measurement of a magnetic field, and an electric field sensor for measuring an electric field, the magnetic field sensor and the electric field sensor being operatively connected to the electronic evaluation unit; and

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

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

2. Combined measuring and detection system according to claim 1, 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 2, 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 1, wherein said electric field sensor is a broadband sensor for measuring low and high-frequency components of the measured electric field.

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

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

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

8. Combined measuring and detection system according to claim 1, wherein at least one of the magnetic field sensor and the electric field sensor is a polyphase device.

9. Combined measuring and detection system according to claim 1, wherein the magnetic field sensor and the electric field sensor are integrated into a single device.

10. Combined measuring and detection system according to claim 1, wherein at least one of the magnetic field sensor, the electric field sensor, and the at least one additional field sensor is/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.