Composite crossarm and power transmission tower

A composite crossarm, comprising:

• at least one insulator;
• and
• at least one arcing device connected to the insulator, each of the at least one arcing device comprising a high-voltage end arcing component and a low-voltage end arcing component,
• wherein the high-voltage end arcing component is connected to a high-voltage end of the insulator, and the low-voltage end arcing component is connected to a low-voltage end of the insulator;
• and
• wherein the at least one arcing device comprises a first arcing device having an electrical clearance between the high-voltage end arcing component and the low-voltage end arcing component less than an electrical clearance between the high-voltage end and the low-voltage end of any one of the at least one insulator;
• wherein the high-voltage end arcing component includes an arcing ball and a first arcing rod;
• wherein a first end of the first arcing rod is connected to the insulator, and a second end of the first arcing rod is connected with the arcing ball;
• and wherein the arcing ball serves as an arcing end of the high-voltage end arcing component,
• the first end of the first arcing rod connected to the insulator is connected with a first groove fitting,
• a grading ring is sleeved on the high-voltage end of the insulator, and the grading ring is connected to the first groove fitting;
• the first groove fitting and the grading ring are spaced from each other in a first direction parallel to an extension direction of the insulator;
• wherein the grading ring is provided with a notch, wherein the second end of the first arcing rod is bent at the notch in a direction away from the grading ring and connected to the arcing ball.