Overvoltage protection device with a measuring device for monitoring overvoltage protection elements

• US 9,312,679 B2
• Filed: 08/10/2012
• Issued: 04/12/2016
• Est. Priority Date: 08/12/2011
• Status: Active Grant

• Current Assignee: Phoenix Contact GmbH & Company KG
• Original Assignee: Phoenix Contact GmbH & Company KG
• Inventors: Meyer, Thomas, Pfortner, Steffen, Siegel, Andrei, Brand, Friedrich-Eckhard
• Primary Examiner(s): Previl, Daniel
• Application Number:
  US14/238,680
• Publication Number:
  US 20140218201A1
• Time in Patent Office: 1,341 Days
• Field of Search: 340/650, 340/662, 340/649, 340651-655, 340659-661, 340/663, 340/664, 340/691.6, 340/2.29, 340/3.43, 340/3.44
• US Class Current: 1/1
• CPC Class Codes: G01R 19/16576 comparing DC or AC voltage with one threshold G01R19/16514, G01R19/16519, G01R19/16528, G01R19/16533 and G01R19/1659 take precedence
• CPC Class Codes: G01R 31/52 Testing for short-circuits, leakage current or ground faults
• CPC Class Codes: H01T 1/12 Means structurally associated with spark gap for recording operation thereof
• CPC Class Codes: H01T 1/14 Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure H01T1/15, H01T1/16, H01T1/18 take precedence; emergency protective circuit arrangements for spark gap arrestors H02H7/24
• CPC Class Codes: H02H 3/20 responsive to excess voltage
• CPC Class Codes: H02H 9/042 comprising means to limit the absorbed power or indicate damaged over-voltage protection device
• CPC Class Codes: H02H 9/06 using spark-gap arresters

Abstract

Systems and methods for overvoltage protection are disclosed. According to one illustrative implementation, an overvoltage protection device is provided having one or more overvoltage protection elements and a measuring device for monitoring the overvoltage protection elements. Further, the measuring device may include an evaluation device, which is designed to count pulse-like overvoltage events which are arrested by the overvoltage protection element, wherein the evaluation device is connected to the overvoltage protection element via a light-measuring device and/or a device for identifying a current flow. In further implementations, overvoltage protection devices may comprise an evaluation device which, on the basis of the counted pulses and/or an identified current flow, may determine whether the overvoltage protection element is still operational, is previously damaged, or is unusable, and/or an alarm device, which indicates whether the overvoltage protection element is still operational, is previously damaged, or is unusable.

Claims

1. An overvoltage protection device comprising:

one or more overvoltage protection elements, including a gas-filled overvoltage arrester, which can be short-circuited, as an overvoltage protection element; and

a measuring arrangement for monitoring the overvoltage protection elements, wherein the measuring arrangement comprises;

a temperature-measuring arrangement, which is in thermal contact with the gas-filled overvoltage arrester, which can be short-circuited;

an evaluating arrangement, which identifies whether the short-circuit spring has been triggered on the basis of a measured first temperature value and a second temperature value, which are measured by the measuring arrangement at a first moment in time and a second moment in time, which is different from the first moment in time, respectively; and

an alarm arrangement, which provides indication as to whether the short-circuit spring has been triggered, wherein the evaluating arrangement is adapted to generate the indication;

wherein the measuring arrangement is adapted for indirectly monitoring triggering of a short circuit spring of the gas-filled overvoltage arrester.

2. The overvoltage protection device according to claim 1, wherein the overvoltage protection device has a semiconductor component, as an overvoltage protection element.

3. The overvoltage protection device according to claim 2, wherein the semiconductor component includes a protective diode and/or a transient-voltage-suppression (TVS) diode.

4. The overvoltage protection device according to claim 2 wherein the alarm arrangement has a first status display, which indicates a previously damaged state, and a second status display, which indicates an unusable state.

5. The overvoltage protection device according to claim 2 wherein the measuring arrangement is also coupled for the indirect monitoring of a short-circuit spring of a gas-filled overvoltage arrester, and

wherein the overvoltage protection device further comprises:

a temperature-measuring arrangement, which is in thermal contact with the gas-filled overvoltage arrester, which can be short-circuited,

an evaluating arrangement, which, based on temperature values that have been measured at different times, identifies whether the short-circuit spring has been triggered,

an alarm arrangement, which indicates the identification of a triggered short-circuit spring, wherein the alarm is implemented by the evaluating arrangement.

6. The overvoltage protection device according to claim 1, wherein the alarm arrangement has a first status display, which indicates a previously damaged state, and a second status display, which indicates an unusable state.

7. The overvoltage protection device according to claim 1, wherein the measuring arrangement is also coupled for the indirect monitoring of a short-circuit spring of the gas-filled overvoltage arrester, and

wherein the overvoltage protection device further comprises:

a temperature-measuring arrangement, which is in thermal contact with the gas-filled overvoltage arrester, which can be short-circuited,

an evaluating arrangement, which, based on temperature values that have been measured at different times, identifies whether the short-circuit spring has been triggered, and

an alarm arrangement, which indicates the identification of a triggered short-circuit spring, wherein the alarm is implemented by the evaluating arrangement.

8. The overvoltage protection device according to claim 7,

wherein the light measuring arrangement is further designed to optically monitor the gas-filled overvoltage arrester, which can be short-circuited, on the basis of the state of the short-circuit spring, and

wherein the evaluating arrangement furthermore identifies, also based on optical measured values which have been measured as different times, whether the short-circuit spring has been triggered.

9. The overvoltage protection device according to claim 8, wherein the temperature sensor is in thermal contact via a gap filler with the gas-filled overvoltage arrester.

10. The overvoltage protection device according to claim 7, wherein the temperature sensor is in thermal contact via a gap filler with the gas-filled overvoltage arrester, which can be short-circuited.

11. The overvoltage protection device according to claim 7, wherein the temperature-measuring arrangement has a thermally variable resistor.

12. The overvoltage protection device according to claim 11, wherein the thermally variable resistor is a positive thermal coefficient (PTC) resistor or a negative temperature coefficient (NTC) resistor.

13. The overvoltage protection device according to claim 7, wherein the temperature-measuring arrangement has a pyrosensor.

14. The overvoltage protection device according to claim 7, wherein the measuring arrangement is arranged and configured for use in a n MSR measure and control application or in telecommunications applications.

15. The overvoltage protection device according to claim 7, wherein the alarm arrangement outputs an optical and/or acoustic and/or an electrical signal when the triggering of the short-circuit spring is identified.

16. A method for operating a measuring arrangement for indirect monitoring of triggering of a short-circuit spring of a gas-filled overvoltage arrester, which can be short-circuited, with a temperature-measuring arrangement, which is in thermal contact with the gas-filled overvoltage arrester, which can be short-circuited, said method comprising the following steps:

measuring a first temperature value at a first moment in time,

measuring a second temperature value at a second moment in time, which is different from the first moment in time,

identifying, on the basis of the measured first temperature value and on the basis of the measured second temperature value, whether the short-circuit spring has been triggered, and

upon identifying that the short-circuit spring has been triggered, indicating the identification.

17. The method according to claim 16, wherein the measuring arrangement further has a light-measuring arrangement, which optically monitors the state of the gas-filled overvoltage arrester, which can be short-circuited, and in particular the triggering of the short-circuit spring, said method further comprising the following steps:

measuring a first optical measured value at a third moment in time,

measuring a second optical measured value at a fourth moment in time, which is different from the third moment in time, and

identifying, on the basis of the measured first optical measured value and on the basis of the measured second optical measured value, whether the short-circuit spring has been triggered.

18. The method according to claim 17, wherein the measuring arrangement further has an alarm arrangement, said method further comprising:

outputting one or more of an optical signal, an acoustic signal and an electrical signal when the triggering of the short-circuit spring has been identified.

19. The method according to claim 16, wherein the measuring arrangement further has an alarm arrangement, said method further comprising the following step:

outputting one or more of an optical signal, an acoustic signal and an electrical signal when the triggering of the short-circuit spring has been identified.

20. An overvoltage protection device with one or more overvoltage protection elements and a measuring arrangement for monitoring the overvoltage protection elements, the overvoltage protection device comprising:

an evaluating arrangement, which is designed to count pulse-like overvoltage events which are arrested by the overvoltage protection element, wherein the evaluating arrangement is connected via a light-measuring arrangement to the overvoltage protection element, and/or

an arrangement for identifying a current which is flowing for a long period time and which is flowing through the overvoltage protection element;

wherein the overvoltage protection device additionally comprises;

an evaluating arrangement, which, based on the counted pulses and/or an identified current which is flowing for a long period of time, determines whether the overvoltage protection element is still operational, has sustained previous damage or is unusable and

a first alarm arrangement, which indicates whether the overvoltage protection element is still operational, has sustained previous damage or is unusable;

wherein the measuring arrangement is also coupled for the indirect monitoring of a short-circuit spring of a gas-filled overvoltage arrester, and

wherein the overvoltage protection device further comprises;

a temperature-measuring arrangement, which is in thermal contact with the gas-filled overvoltage arrester, which can be short-circuited,

an evaluating arrangement, which, based on temperature values that have been measured at different times, identifies whether the short-circuit spring has been triggered, and

a second alarm arrangement, which indicates the identification of a triggered short-circuit spring, wherein the alarm is implemented by the evaluating arrangement.

21. An overvoltage protection device comprising:

one or more overvoltage protection elements, wherein at least one of the one or more overvoltage protection elements includes a gas-filled overvoltage arrester;

a measuring arrangement for monitoring the one or more overvoltage protection elements, wherein the measuring arrangement is also coupled for indirect monitoring of a short-circuit spring of a gas-filled overvoltage arrester;

a first evaluating arrangement, which, based on the counted pulses and/or an identified current which is flowing for a long period of time, determines whether the overvoltage protection element is still operational, has sustained previous damage or is unusable, and

a first alarm arrangement, which indicates whether the overvoltage protection element is still operational, has sustained previous damage or is unusable;

a temperature-measuring arrangement, which is in thermal contact with the gas-filled overvoltage arrester, which can be short-circuited,

a second evaluating arrangement, which, based on temperature values that have been measured at different times, identifies whether the short-circuit spring has been triggered;

a second alarm arrangement, which indicates the identification of a triggered short-circuit spring, wherein the alarm is implemented by the evaluating arrangement;

wherein the overvoltage protection device further comprises;

a second evaluating arrangement, which is designed to count pulse-like overvoltage events which are arrested by the overvoltage protection element, wherein the evaluating arrangement is connected via a light-measuring arrangement to the overvoltage protection element, and/or

an identifying arrangement for identifying a current which is flowing for a long period time and which is flowing through the overvoltage protection element.