High voltage direct current connector assembly or adapter with arc protection

1. An electrical receptacle comprising:

a housing;

stationary electrical contacts for transferring power received at the electrical receptacle to a connected device;

pin contacts for mating with socket contacts on a plug to create a first connection when the plug is moved along a longitudinal axis of the housing; and

internal contacts extending from the pin contacts and located within the housing for mating with the stationary electrical contacts to create a second connection with movement of the plug different from movement for said first connection;

wherein an electrical arc created between one of the internal contacts and one of the stationary electrical contacts is contained within the housing.

2. The electrical receptacle of claim 1 wherein said movement of the plug to create said second connection comprises a rotation about said longitudinal axis.

3. The electrical receptacle of claim 1 further comprising an enable switch operable to transmit an enable signal to the connected device.

4. The electrical receptacle of claim 3 wherein the enable switch is activated upon movement of the plug.

5. The electrical receptacle of claim 3 wherein the internal contacts are configured to increase a delay between contact with the stationary electrical contacts and activation of the enable switch.

6. The electrical receptacle of claim 1 further comprising a locking element for retaining the plug in the receptacle.

7. The electrical receptacle of claim 6 wherein the locking element comprises a recess formed in an internal wall of the housing for receiving a locking tab on the plug.

8. The electrical receptacle of claim 6 wherein the locking element further comprises a spring.

9. The electrical receptacle of claim 1 wherein the pin contacts extend through a rotor and are rotatable therewith relative to the housing to create said second connection.

10. The electrical receptacle of claim 1 wherein the stationary electrical contacts comprise a brush area for the internal contacts to brush over with said movement of the plug to create said second connection.

11. The electrical receptacle of claim 1 wherein the electrical receptacle is configured for receiving HVDC (High Voltage Direct Current) or AC (Alternating Current) from the plug.

12. The electrical receptacle of claim 1 wherein said movement of the plug to create said second connection comprises translation along a lateral axis.

13. The electrical receptacle of claim 1 wherein a protective earth conductor is permanently connected between one of the internal contacts and one of the pin contacts.

14. A method comprising:

engaging pin contacts on a receptacle with socket contacts on a plug with a first movement of the plug along a longitudinal axis of the receptacle; and

engaging internal contacts extending from the pin contacts with stationary electrical contacts in the receptacle with a second movement of the plug different from said first movement;

wherein an electrical arc created between one of the internal contacts and one of the stationary electrical contacts is contained within a housing of the receptacle.

15. The method of claim 14 wherein said second movement comprises rotation about said longitudinal access.

16. The method of claim 14 further comprising activating an enable switch and transmitting an enable signal to a connected device.

17. The method of claim 14 further comprising retaining the plug within the receptacle.

18. The method of claim 14 wherein the receptacle is configured for receiving HVDC (High Voltage Direct Current) or AC (Alternating Current) from the plug and the pin contacts are configured to mate with an IEC 60320 connector.

19. The method of claim 14 wherein said second movement comprises translation along a lateral axis.

20. The method of claim 14 wherein a protective earth conductor is permanently connected between one of the internal contacts and one of the pin contacts.

21. An adapter comprising:

a body;

a plug connected to the body and configured for mating with a receptacle on a device to create a connection without electrical arc protection;

an HVDC (High Voltage Direct Current) receptacle connected to the body and configured with electrical arc protection, the HVDC receptacle electrically coupled to the plug; and

a housing comprising an opening corresponding to the HVDC receptacle, wherein the housing is slidable relative to the body as the adapter moves from a first position to a second position when the housing is attached to the device;

wherein the HVDC receptacle is at least partially blocked by the housing to prevent connection with an HVDC plug when the adapter is in said first position, and said opening in the housing is aligned with the HVDC receptacle when the adapter is in said second position to allow connection with the HVDC plug and prevent removal of the adapter from the device with the HVDC plug connected to the HVDC receptacle.

22. The adapter of claim 21 wherein the housing comprises a bracket for attaching the adapter to the device.

23. The adapter of claim 21 wherein the plug extends from one side of the housing and the HVDC receptacle is located on an opposite side of the housing.

24. The adapter of claim 21 wherein the plug is configured in accordance with IEC 60320.

25. The adapter of claim 21 wherein a sliding motion from said first position to said second position interlocks the housing with the device.