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10kV cable terminal connected from the falling fuse or straight overhead cable should be a hard copper wire, and its cross-sectional area should not be less than the rule.
Leading connection method
Straight copper overhead wires can be connected with copper base clips. The copper base clips are selected according to the standard of the lead wires. When the overhead wire is used, the bottom board of the copper base should be placed on the overhead line except for the live lap joints.
10) When the 35kV cable lead-out line is used to take the aluminum overhead line or the overhead lead-off line, a copper-aluminum transition cable clamp or a special aluminum parallel groove clamp shall be used. The standard for aluminum leads is the same as for overhead lines. Special-shaped aluminum and groove clamp according to the aluminum lead wire for the cross-section LJ16) 70, LJ95) 120, LJ95) 300 three.
The 10kV cross-linked polyethylene cable heat shrinking field terminal can directly connect the cable tail to the transitional copper bar of the post arrester, and the transitional copper bar and the overhead lead-off line are connected.
Cable terminal and connector grounding rules
When the cable breaks through the insulation breakdown or the system is short-circuited, the fault current in the cable conductor will cause the inductive voltage in the metal sheath of the cable. For the safety of the human body and the equipment, it is necessary to install the grounding cable at the cable terminal and the joint according to the rules. . In the cable terminations and joints, the metal casing, cable sheathing, armored layer, metal brackets for cables and joints, and metal maintenance pipes for cable terminations and joints shall be in accordance with the rules of "Construction and Inspection Standards for Grounded Equipment". Use a ground wire or ground bar for grounding. The three-phase terminal and connector's metal shell and cable metal sheath need to be connected by the equipotential connection. The equipotential connection should be satisfactory for the circulating current of the cable sheath.
For cable terminals and connectors, the grounding wire and equipotential bonding wires are usually 35%%2 tin-plated soft copper wire. Cables with a cross section of 120 mm2 and below can also be used with 25 mm2 forged tin soft copper wire.
In the 6-10kV cable line, when zero-sequence maintenance is selected, the cable should pass through the zero-sequence current transformer. When the grounding line connection point is between the zero-sequence current transformer and the terminal, the grounding line should be insulated. The wire passes through the zero-sequence current transformer.
The metal jacket of high-voltage single-core cable shall be connected and grounded according to the rules of interpenetrating interconnection or single-point interconnection.
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Leading connection method
Straight copper overhead wires can be connected with copper base clips. The copper base clips are selected according to the standard of the lead wires. When the overhead wire is used, the bottom board of the copper base should be placed on the overhead line except for the live lap joints.
10) When the 35kV cable lead-out line is used to take the aluminum overhead line or the overhead lead-off line, a copper-aluminum transition cable clamp or a special aluminum parallel groove clamp shall be used. The standard for aluminum leads is the same as for overhead lines. Special-shaped aluminum and groove clamp according to the aluminum lead wire for the cross-section LJ16) 70, LJ95) 120, LJ95) 300 three.
The 10kV cross-linked polyethylene cable heat shrinking field terminal can directly connect the cable tail to the transitional copper bar of the post arrester, and the transitional copper bar and the overhead lead-off line are connected.
Cable terminal and connector grounding rules
When the cable breaks through the insulation breakdown or the system is short-circuited, the fault current in the cable conductor will cause the inductive voltage in the metal sheath of the cable. For the safety of the human body and the equipment, it is necessary to install the grounding cable at the cable terminal and the joint according to the rules. . In the cable terminations and joints, the metal casing, cable sheathing, armored layer, metal brackets for cables and joints, and metal maintenance pipes for cable terminations and joints shall be in accordance with the rules of "Construction and Inspection Standards for Grounded Equipment". Use a ground wire or ground bar for grounding. The three-phase terminal and connector's metal shell and cable metal sheath need to be connected by the equipotential connection. The equipotential connection should be satisfactory for the circulating current of the cable sheath.
For cable terminals and connectors, the grounding wire and equipotential bonding wires are usually 35%%2 tin-plated soft copper wire. Cables with a cross section of 120 mm2 and below can also be used with 25 mm2 forged tin soft copper wire.
In the 6-10kV cable line, when zero-sequence maintenance is selected, the cable should pass through the zero-sequence current transformer. When the grounding line connection point is between the zero-sequence current transformer and the terminal, the grounding line should be insulated. The wire passes through the zero-sequence current transformer.
The metal jacket of high-voltage single-core cable shall be connected and grounded according to the rules of interpenetrating interconnection or single-point interconnection.
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