RELAY INCLUDING PROCESSOR PROVIDING CONTROL AND/OR MONITORING

• US 20150028877A1
• Filed: 01/09/2013
• Published: 01/29/2015
• Est. Priority Date: 03/12/2012
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Corp. (Wisconsin) (Eaton Corporation PLC.)
• Inventors: McCormick, James M., Mills, Patrick W., Schmalz, Steven C.
• Granted Patent: US 9,711,309 B2
• Time in Patent Office: Days
• US Class Current: 324/418
• CPC Class Codes: H01H 2300/052 Controlling, signalling or testing correct functioning of a switch
• CPC Class Codes: H01H 47/002 Monitoring or fail-safe circuits
• CPC Class Codes: H01H 47/08 by changing number of parallel-connected turns or windings
• CPC Class Codes: H01H 47/226 for bistable relays
• CPC Class Codes: H01H 50/00 Details of electromagnetic relays H01H51/28 takes precedence; electric circuit arrangements H01H47/00; details of electrically-operated selector switches H01H63/00

Abstract

A relay includes a first terminal, a second terminal, a third terminal, a fourth terminal, separable contacts electrically connected between the first and second terminals, an actuator coil comprising a first winding and a second winding, the first winding electrically connected between the third and fourth terminals, the second winding electrically connected between the third and fourth terminals, a processor, an output, a first voltage sensing circuit cooperating with the processor to determine a first voltage between the first and second terminals, and a second voltage sensing circuit cooperating with the processor to determine a second voltage between the third and fourth terminals. The processor determines that the separable contacts are closed when the first voltage does not exceed a first predetermined value and the second voltage exceeds a second predetermined value and responsively outputs a corresponding status to the output.

Claims

1. A relay comprising:

a first terminal;

a second terminal;

a third terminal;

a fourth terminal;

separable contacts electrically connected between said first and second terminals;

an actuator coil comprising a first winding and a second winding, the first winding electrically connected between said third and fourth terminals, the second winding electrically connected between said third and fourth terminals;

a processor;

an output;

a first voltage sensing circuit cooperating with said processor to determine a first voltage between said first and second terminals; and

a second voltage sensing circuit cooperating with said processor to determine a second voltage between said third and fourth terminals,

wherein said processor is structured to determine that said separable contacts are closed when the first voltage does not exceed a first predetermined value and the second voltage exceeds a second predetermined value and to responsively output a corresponding status to said output.

2. The relay of claim 1 wherein said processor is further structured to determine a failure of said separable contacts to close when the first voltage exceeds the first predetermined value and the second voltage exceeds the second predetermined value and to responsively output another corresponding status to said output.

3. The relay of claim 1 wherein said processor is further structured to determine a failure of said separable contacts to open when the first voltage does not exceed the first predetermined value and the second voltage does not exceed the second predetermined value and to responsively output another corresponding status to said output.

4. The relay of claim 1 wherein said processor is further structured to communicate the corresponding status from said output to another processor.

5. The relay of claim 1 further comprising:

a switch electrically connected in series with the second winding, the series combination of said switch and the second winding electrically connected between said third and fourth terminals,

wherein said processor comprises an output structured to open and close said switch, and

wherein said processor is structured to normally cause the output to close said switch, to determine when the first voltage does not exceed the first predetermined value and the second voltage exceeds the second predetermined value, and to responsively cause the output to open said switch.

6. The relay of claim 5 wherein the output is a first output;

wherein said processor further comprises a second output; and

wherein said processor is further structured to communicate the corresponding status from said second output to another processor.

7. The relay of claim 1 further comprising:

a current sensing circuit cooperating with said processor to determine a current flowing between said first and second terminals,

wherein said processor is further structured to determine that said separable contacts are closed and power is flowing to a load when the first voltage does not exceed the first predetermined value, the second voltage exceeds the second predetermined value, and the current exceeds a third predetermined value, and to responsively output a corresponding status to said output.

8. The relay of claim 7 wherein said processor is further structured to determine that said separable contacts are closed and power is not flowing to a load when the first voltage does not exceed the first predetermined value, the second voltage exceeds the second predetermined value, and the current does not exceed the third predetermined value, and to responsively output another corresponding status to said output.

9. The relay of claim 7 wherein said processor is further structured to determine a failure of said separable contacts to close when the first voltage exceeds the first predetermined value, the second voltage exceeds the second predetermined value, and the current does not exceed the third predetermined value, and to responsively output another corresponding status to said output.

10. The relay of claim 7 wherein said processor is further structured to determine a failure of said separable contacts to open when the first voltage does not exceed the first predetermined value, the second voltage does not exceed the second predetermined value, and the current exceeds the third predetermined value, and to responsively output another corresponding status to said output.

11. The relay of claim 7 wherein said processor is further structured to determine a failure of said separable contacts to open and a failure of the current sensing circuit when the first voltage does not exceed the first predetermined value, the second voltage does not exceed the second predetermined value, and the current exceeds the third predetermined value, and to responsively output another corresponding status to said output.

12. The relay of claim 7 wherein said processor is further structured to communicate the corresponding status from said output to another processor.