Optical Sensor Arrangement for Electrical Switchgear

An optical sensor configuration, comprising:

• an optical current sensor having an optical fiber;
• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, said first hollow member having two legs with an annular recess formed between said two legs;
• a second hollow member having a member recess formed therein and disposed in said annular recess of said first hollow member, said first and said second hollow members form together a hollow section and define at a boundary surface between said first hollow member and said second hollow member an annular groove;
• said optical fiber of said optical current sensor disposed in said annular groove;
• and
• said optical fiber of said voltage sensor disposed in said member recess of said second hollow member.

Electrical switchgear, comprising:

• an optical sensor configuration, including:
• an optical current sensor having an optical fiber;
• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, said first hollow member having two legs with an annular recess formed between said two legs;
• a second hollow member having a member recess formed therein and disposed in said annular recess of said first hollow member, said first and said second hollow members form together a hollow section and define at a boundary surface between said first hollow member and said second hollow member an annular groove;
• said optical fiber of said optical current sensor disposed in said annular groove;
• and
• said optical fiber of said voltage sensor disposed in said member recess of said second hollow member.

A method for assembling gas insulated electrical switchgear, which comprises the steps of:

• assembling an optical sensor configuration, containing:
• an optical current sensor having an optical fiber;
• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, the first hollow member having two legs with an annular recess formed between the two legs;
• a second hollow member having a member recess formed therein and disposed in the annular recess of the first hollow member, the first and second hollow members form together a hollow section and define at a boundary surface between the first hollow member and the second hollow member an annular groove;
• the optical fiber of the optical current sensor disposed in the annular groove;
• the optical fiber of the voltage sensor disposed in the member recess of the second hollow member;
• and
• disposing the optical sensor configuration between two flanges of adjacent parts of an enclosure of the electrical switchgear.

A method for retrofitting gas insulated electrical switchgear, which comprises the steps of:

• assembling an optical sensor configuration, containing:
• an optical current sensor having an optical fiber;
• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, the first hollow member having two legs with an annular recess formed between the two legs;
• a second hollow member having a member recess formed therein and disposed in the annular recess of the first hollow member, the first and second hollow members form together a hollow section and define at a boundary surface between the first hollow member and the second hollow member an annular groove;
• the optical fiber of the optical current sensor disposed in the annular groove;
• the optical fiber of the voltage sensor disposed in the member recess of the second hollow member;
• and
• disposing the optical sensor configuration between two flanges of adjacent parts of an enclosure of the electrical switchgear.

An optical sensor configuration, comprising:

• an optical current sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, said first hollow member having two legs with an annular recess formed between said two legs;
• a second hollow member disposed in said annular recess of said first hollow member, said first and said second hollow members form together a hollow section and define at a boundary surface between said first hollow member and said second hollow member an annular groove;
• and
• said optical fiber of said optical current sensor disposed in said annular groove.

An optical sensor configuration, comprising:

• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, said first hollow member having two legs with an annular recess formed between said two legs;
• a second hollow member having a member recess formed therein and disposed in said annular recess of said first hollow member;
• and
• said optical fiber of said voltage sensor disposed in said member recess of said second hollow member.

Electrical switchgear, comprising:

• an optical sensor configuration, including:
• an optical current sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, said first hollow member having two legs with an annular recess formed between said two legs;
• a second hollow member disposed in said annular recess of said first hollow member, said first and said second hollow members form together a hollow section and define at a boundary surface between said first hollow member and said second hollow member an annular groove;
• and
• said optical fiber of said optical current sensor disposed in said annular groove.

Electrical switchgear, comprising:

• an optical sensor configuration, including:
• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, said first hollow member having two legs with an annular recess formed between said two legs;
• a second hollow member having a member recess formed therein and disposed in said annular recess of said first hollow member;
• and
• said optical fiber of said voltage sensor disposed in said member recess of said second hollow member.

A method for assembling gas insulated electrical switchgear, which comprises the steps of:

• assembling an optical sensor configuration, containing:
• an optical current sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, the first hollow member having two legs with an annular recess formed between the two legs;
• a second hollow member disposed in the annular recess of the first hollow member, the first and second hollow members form together a hollow section and define at a boundary surface between the first hollow member and the second hollow member an annular groove;
• the optical fiber of the optical current sensor disposed in the annular groove;
• and
• disposing the optical sensor configuration between two flanges of adjacent parts of an enclosure of the electrical switchgear.

A method for assembling gas insulated electrical switchgear, which comprises the steps of:

• assembling an optical sensor configuration, containing:
• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, the first hollow member having two legs with an annular recess formed between the two legs;
• a second hollow member having a member recess formed therein and disposed in the annular recess of the first hollow member;
• the optical fiber of the voltage sensor disposed in the member recess of the second hollow member;
• and
• disposing the optical sensor configuration between two flanges of adjacent parts of an enclosure of the electrical switchgear.

A method for retrofitting gas insulated electrical switchgear, which comprises the steps of:

• assembling an optical sensor configuration, containing:
• an optical current sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, the first hollow member having two legs with an annular recess formed between the two legs;
• a second hollow member disposed in the annular recess of the first hollow member, the first and second hollow members form together a hollow section and define at a boundary surface between the first hollow member and the second hollow member an annular groove;
• the optical fiber of the optical current sensor disposed in the annular groove;
• and
• disposing the optical sensor configuration between two flanges of adjacent parts of an enclosure of the electrical switchgear.

A method for retrofitting gas insulated electrical switchgear, which comprises the steps of:

• assembling an optical sensor configuration, containing:
• an optical voltage sensor having an optical fiber;
• a first hollow member selected from the group consisting of L-shaped rings and U-shaped rings, the first hollow member having two legs with an annular recess formed between the two legs;
• a second hollow member having a member recess formed therein and disposed in the annular recess of the first hollow member;
• the optical fiber of the voltage sensor disposed in the member recess of the second hollow member;
• and
• disposing the optical sensor configuration between two flanges of adjacent parts of an enclosure of the electrical switchgear.