Electrical Circuit Quick Connection And Disconnection System With Automatic Short Circuit Of Current Transformer Secondaries

• US 20090186504A1
• Filed: 03/15/2007
• Published: 07/23/2009
• Est. Priority Date: 04/24/2006
• Status: Active Grant

• Current Assignee: Eduardo Pedrosa Santos
• Original Assignee: Eduardo Pedrosa Santos
• Inventors: Santos, Eduardo Pedrosa
• Granted Patent: US 7,955,102 B2
• Time in Patent Office: Days
• US Class Current: 439/188
• CPC Class Codes: H01F 27/04 Leading of conductors or axles through casings, e.g. for tap-changing arrangements
• CPC Class Codes: H01F 27/40 Structural association with built-in electric component, e.g. fuse
• CPC Class Codes: H01F 38/32 Circuit arrangements
• CPC Class Codes: H01R 13/7031 Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity

Abstract

Electrical circuit quick connection and disconnection system with automatic short circuit of current transformer secondaries and similar devices, consists of a multipole plug (6) and receptacle (11) system with automatic short-circuit capacity between the poles (7, 12) upon initiation of disconnection between the plug (6) and the receptacle (11), without incurring in the temporary opening of the circuit, for application in current transformer (3) secondary circuits (3B) and other applications requiring the same characteristics. The system is equipped with a number N of paired poles (7, 12), being that each pair of poles (7, 12) is connected to a CT (3) secondary (3B), therefore handling the connection of N CT (3) secondaries (3B). Each pair of poles (J, 12) is equipped with a system that, under normal conditions of use, that is, with the plug (6) and the receptacle (11) connected, allows the normal passage of current from the CT (3) secondary (3B) to the load (14) connected to the latter, without short-circuiting the CT (3) secondary (3B).

Claims

1. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

characterized by a multipole plug (6) and receptacle (11) system with automatic short circuit capacity between poles (7,12) upon initiating the disconnection between the plug (6) and receptacle (11), without incurring in the temporary opening of the circuit (3), for application in current transformer secondary circuits (3B) and other applications requiring the same characteristics.

2. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 1, characterized by the plug (6) and receptacle (11) having a number N of paired poles (7, 12), with each pair of poles (7, 12) being connected to a CT (3) secondary (3B), therefore handling the connection of N CT (3) secondaries.

3. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 2, characterized by each pair of poles (7, 12) having a system that, under normal conditions of use, that is, with the plug (6) and receptacle (11) connected, allows the normal passage of current from the CT (3) secondary (3B) to the load (14) connected to the latter, without short-circuiting the CT (3) secondary (3B).

4. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 1, characterized by the fact that upon initiating the mechanical disconnection between the plug (6) and the receptacle (11), however with the electrical connection between the plug (6) and the receptacle (11) still present, the CT (3) secondary (3B) is automatically short-circuited before the circuit is interrupted;

continuing with the mechanical disconnection, the electric connection between plug (6) and receptacle (11) is interrupted.

5. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 4, characterized by the pair of male (7) or female (12) poles to which the CT (3) secondary (3B) is connected being electrically connected to a series of fixed contacts (10) that can be short-circuited by a series of moveable contacts (9) with the aid of one or more springs (8), in order to short-circuit the CT (3) secondary (3B).

6. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 5, characterized by the fact that once the plug (6) and receptacle (11) are mechanically and electrically disconnected, the moveable contacts (9) are pushed against the fixed contacts (10) by one or more springs (8), so as to short-circuit the CT (3) secondary (3B).

7. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 5, characterized by the fact that upon initiating the mechanical disconnection, although still incomplete, between the plug (6) and the receptacle (11), the male poles (7) already make electrical contact with the female poles (12), while the moveable contact (9) continues to touch the fixed contact (10) due to the strength of the spring (8) so as to maintain the CT (3) secondary (3B) short-circuited.

8. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 5, characterized by the fact that once the mechanical connection of the plug (6) and receptacle (11) is completed, the male poles (7) of the plug (6) are totally inserted and electrically connected to the female poles (12) of the receptacle (11) and the receptacle (11) pin (13) has pushed the moveable contact (9) so as to separate it from the fixed contact (10), having overcome the tension of the spring (8) and removing the short-circuit of the CT (3) secondary (3B), allowing the current from the CT (5) secondary (3B) to flow in the direction of the load (14).

9. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 5, characterized by the fact that being the plug (6) and the receptacle (11) completely connected, upon initiating the mechanical disconnection between the plug (6) and the receptacle (11), however with the male poles (7) and female poles (12) still being electrically connected, the receptacle (11) pin (13) has already been removed from the plug (6), so that the CT (3) secondary (3B) has already been short-circuited by the moveable contact (9) that touches the fixed contact (10) pushed by the strength of the spring (8).

10. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 5, characterized by the fact that upon completion of the disconnection between the plug (6) and the receptacle (11) the CT (3) secondary (3B) remains short-circuited, although the male (7) and female (12) poles are electrically disconnected and the secondary current (5) is no longer crossing the load.

11. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 5, characterized by allowing the assembly the fixed (10) and moveable (9) short-circuit contacts next to the male poles (7) or next to the female poles (12).

12. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 1, characterized by having a visual indicator (16) that warns the user that the short-circuit contacts are open.

13. ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 12, characterized by the fact that the visual indicator (16) is mechanically fixed to the moveable contact (9), so as to remain hidden inside the plug (6) when the CT (3) secondary (3B) is short-circuited and to. appear on the outside the plug (6) when the CT (3) secondary (3B) is not short-circuited.

14. “

ELECTRICAL CIRCUIT QUICK CONNECTION AND DISCONNECTION SYSTEM WITH AUTOMATIC SHORT CIRCUIT OF CURRENT TRANSFORMER SECONDARIES AND SIMILAR DEVICES”

according to claim 1, characterized by the fact of being applicable to situations in which the automatic short-circuit between the poles is not necessary or desirable, and, for this reason, is equipped with a locking system (15) capable of maintaining the moveable short-circuit contact (9) separated from the fixed contact (10), even if the plug (6) and receptacle (11) are not connected.