METHOD OF PERFORMING A DIELECTRIC VOLTAGE-WITHSTAND TEST ON A WIRE HARNESS

• US 20020171434A1
• Filed: 05/15/2001
• Published: 11/21/2002
• Est. Priority Date: 05/15/2001
• Status: Active Grant

• Current Assignee: Pent Technologies, Inc.
• Original Assignee: Pent Products, Inc. (Graham Holdings Company)
• Inventors: Karst, Eric S., Stanford, James G.
• Granted Patent: US 6,496,015 B2
• Time in Patent Office: Days
• US Class Current: 324/541
• CPC Class Codes: G01R 31/1272 of cable, line or wire insulation, e.g. using partial discharge measurements locating faults in cables G01R31/083
• CPC Class Codes: G01R 31/58 Testing of lines, cables or conductors testing of electric windings G01R31/72

Abstract

A method of performing a dielectric voltage-withstand test on a wire harness having a plurality of conductors includes applying voltage simultaneously to a first subset of the conductors. The first subset includes at least two of the conductors. An electrical characteristic of each of the conductors excluded from the first subset of conductors is measured. The applying and measuring steps are repeated for at least one additional subset of the conductors. It is decided whether the wire harness passes the test based upon at least one of the measuring steps.

Claims

1. A method of performing a dielectric voltage-withstand test on a wire harness having a plurality of conductors, said method comprising the steps of:

applying voltage simultaneously to a first subset of the conductors, said first subset including at least two of the conductors;

measuring an electrical characteristic of each of the conductors excluded from said first subset of conductors;

repeating said applying and measuring steps for at least one additional subset of the conductors; and

deciding whether the wire harness passes the test, said deciding being based upon at least one of said measuring steps.

2. The method of claim 1, wherein each said measuring step occurs during a corresponding said applying step.

3. The method of claim 1, wherein a total number of said subsets is less than a total number of the conductors.

4. The method of claim 3, wherein the total number of said subsets is one of less than and equal to m, wherein m satisfies the equation:

2<sup>m−

1</sup><

C≦

2^m,

and wherein C is the total number of the conductors.

5. The method of claim 1, wherein the electrical characteristic comprises a level of electrical current flowing through each of the conductors excluded from said first subset of conductors.

6. The method of claim 1, wherein the electrical characteristic comprises a total of respective electrical currents flowing through each of the conductors excluded from said first subset of conductors.

7. The method of claim 6, wherein said deciding step is based on whether said total of said respective electrical currents exceeds a predetermined threshold level of current.

8. The method of claim 1, wherein said deciding step is based exclusively upon said measuring steps.

9. The method of claim 1, wherein at least one of said conductors is included in at least two of said subsets.

10. The method of claim 1, wherein one of the conductors is included in all of said subsets.

11. The method of claim 1, wherein one of the conductors is included in none of said subsets.

12. The method of claim 11, wherein said one conductor is connected to electrical ground.

14. The method of claim 13, wherein each said measuring step occurs during a corresponding said applying step.

15. The method of claim 13, wherein the electrical characteristic comprises a level of electrical current flowing through each of said excluded conductors.

16. The method of claim 13, wherein the electrical characteristic comprises a total of respective electrical currents flowing through each of said excluded conductors.

17. The method of claim 16, wherein said deciding step is based on whether said total of said respective electrical currents exceeds a predetermined threshold level of current.

18. The method of claim 13, wherein said deciding step is based exclusively upon said measuring steps.

13. A method of performing a dielectric voltage-withstand test on a wire harness having eight conductors, said method comprising the steps of:

applying voltage simultaneously to a first set of four of the conductors;

measuring an electrical characteristic of each of the conductors excluded from said first set of conductors;

applying voltage simultaneously to a second set of four of the conductors, two of the second set of conductors also being in said first set of conductors;

measuring an electrical characteristic of each of the conductors excluded from said second set of conductors;

applying voltage simultaneously to a third set of four of the conductors, a first conductor of the third set of conductors also being in said first set of conductors, a second conductor of the third set of conductors also being in said second set of conductors, a third conductor of the third set of conductors also being in each of said first set of conductors and said second set of conductors, and a fourth conductor of the third set of conductors being in neither said first set of conductors nor said second set of conductors;

measuring an electrical characteristic of each of the conductors excluded from said third set of conductors; and

deciding whether the wire harness passes the test, said deciding being based upon at least one of said measuring steps.