Drawing · EN — Single-sheet A3 dimension drawing (2016) for the 3EK4 silicone-housed distribution-class surge arrester. It shows two isometric views of the complete arrester mounted on its crossarm/hanger bracket with the disconnector fitted below the base, plus dimensioned detail views of the disconnector unit in two terminal-stud variants: the IEC version with an M12 stud (76 mm overall disconnector height, 27 mm lower stud section) and the IEEE version with a 3/8-16" stud (2.87" overall, 0.85" stud section). The sheet carries no confidentiality markings, prices, or customer data.
This sheet is a mechanical dimension drawing for the 3EK4 medium-voltage surge arrester, covering the disconnector assembly that mounts below the arrester base. Two full isometric renderings on the left show the complete arrester — silicone-shed housing, top terminal stud with clamp, and the combined mounting/hanger bracket — with the disconnector unit attached at the bottom.
The right half of the sheet contains the dimensioned detail views of the disconnector itself, each drawn as a dimensioned elevation view with centerline alongside an isometric view, for two hardware standards: an IEC (metric) variant and an IEEE (imperial) variant. The two variants differ in the bottom terminal stud thread and in the washer stack — the IEEE version is drawn with a spring/star lock washer under the disconnector body.
The IEC disconnector detail is dimensioned in millimetres. The bottom connection is an M12 threaded stud; the exposed stud-and-nut stack below the disconnector body measures 27 mm, and the complete disconnector unit measures 76 mm overall.
| Dimension | Value |
|---|---|
| Bottom terminal stud thread | M12 |
| Overall height of disconnector unit | 76 mm |
| Lower stud section (below disconnector body) | 27 mm |
The IEEE disconnector detail is dimensioned in inches. The bottom connection is a 3/8-16" threaded stud (the standard UNC coarse pitch); the stud section below the disconnector body measures 0.85", and the complete unit measures 2.87" overall. This variant is drawn with a star-type lock washer between the disconnector body and the nut stack.
| Dimension | Value |
|---|---|
| Bottom terminal stud thread | 3/8-16" |
| Overall height of disconnector unit | 2.87" |
| Lower stud section (below disconnector body) | 0.85" |
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