An insulator for electrically insulating an electrical conductor , the insulator comprising: a roll defining a central longitudinal through hole along a longitudinal axis of the insulator, arranged for allowing an electrical conductor to pass there through; and at least one shed arranged on an outer surface of the roll; wherein the shed comprises a shed tip having an outer non-flat curvature defined by a plurality of different radii of curvature (R, r1, r2) and comprising a most distal point of the shed; wherein an end radius of curvature (R) at the most distal point of the curvature is larger than a first radius of curvature (r1) at one side of the most distal point and a second radius of curvature (r2) at the other side of the most distal point, and wherein the end radius of curvature (R) is at least twice as large as the first radius of curvature (r1) and/or at least twice as large as the second radius of curvature (r2), wherein a tip thickness (T) is defined as a largest cross sectional thickness of the shed tip of the shed , the shed tip being delimited by a straight line between a first point marking a transition between a substantially flat upper outer surface of the shed and the curvature and a second point marking a transition between a substantially flat lower outer surface 15 of the shed and the curvature ; and wherein the end radius of curvature (R) is larger than half of the tip thickness (T), e.g. equal to or larger than the tip thickness, and wherein the end radius of curvature (R) is within the range of 0.6 times the tip thickness (T) to 10 times the tip thickness, e.g. within the range of 0.7 times the tip thickness to 3 times the tip thickness. a roll defining a central longitudinal through hole along a longitudinal axis of the insulator, arranged for allowing an electrical conductor to pass there through; and at least one shed arranged on an outer surface of the roll; wherein the shed comprises a shed tip having an outer non-flat curvature defined by a plurality of different radii of curvature (R, r1, r2) and comprising a most distal point of the shed; wherein an end radius of curvature (R) at the most distal point of the curvature is larger than a first radius of curvature (r1) at one side of the most distal point and a second radius of curvature (r2) at the other side of the most distal point, and wherein the end radius of curvature (R) is at least twice as large as the first radius of curvature (r1) and/or at least twice as large as the second radius of curvature (r2), wherein a tip thickness (T) is defined as a largest cross sectional thickness of the shed tip of the shed , the shed tip being delimited by a straight line between a first point marking a transition between a substantially flat upper outer surface of the shed and the curvature and a second point marking a transition between a substantially flat lower outer surface 15 of the shed and the curvature ; and wherein the end radius of curvature (R) is larger than half of the tip thickness (T), e.g. equal to or larger than the tip thickness, and wherein the end radius of curvature (R) is within the range of 0.6 times the tip thickness (T) to 10 times the tip thickness, e.g. within the range of 0.7 times the tip thickness to 3 times the tip thickness. <EOS>