Substation 138 kV Kit

• Number of meshes/prefabs: 14 equipment prefabs + 1 scale figure; 2 scenes

• Number of textures: 24 PNG (3 per material) + label atlas

• Texture dimensions: 1024 × 1024, tileable, 1 m per repetition; label atlas 256 × 256

• Types of materials and texture maps: 8 PBR materials (URP Lit; Standard in the Built-in extra); albedo, normal, metallic (R) + smoothness (A)

• Minimum polygon count: 6 612 triangles (InsulatorString_138kV_Single, LOD0)

• Maximum polygon count: 110 532 triangles (Disconnector_DoubleBreak_138kV, LOD0)

• LOD information: 3 levels per prefab, LOD Group

• UV mapping: Yes (UV2 generated on import for baked lighting)

• Rigging: No

• Animation count: 0 (parts move by script: OperablePart)

• Colliders: primitive colliders on every prefab

• Scale: 1 unit = 1 m, pivot at the base, front at +Z

• Scripts: 4 runtime scripts in their own assembly (Arkeh3D.Substation138kV.Runtime)

• Triangles LOD0 / LOD1 / LOD2:

Breaker_138kV 59 108 / 29 744 / 12 392

Disconnector_CenterBreak_138kV 89 968 / 51 684 / 22 340

Disconnector_DoubleBreak_138kV 110 532 / 51 648 / 26 472

Disconnector_SemiPantograph_138kV 88 796 / 43 696 / 18 288

CurrentTransformer_138kV 17 916 / 10 380 / 3 932

VoltageTransformer_138kV 19 300 / 9 348 / 4 228

SurgeArrester_138kV 16 900 / 8 244 / 4 148

PostInsulator_138kV 14 460 / 7 756 / 2 764

LineTrap_138kV 29 456 / 16 152 / 5 712

InsulatorString_138kV_Single 6 612 / 2 788 / 1 508

InsulatorString_138kV_Double 12 828 / 5 460 / 2 900

Gantry_138kV 49 056 / 15 840 / 7 888

Gantry_138kV_SwitchBeam 60 416 / 20 672 / 10 656

PowerTransformer_138kV 53 844 / 31 912 / 12 968

This kit is for building scenes for substation training, games in general, VR simulators, companies and technical schools.

I work on 3D services for electrical substations, and I saw the chance to offer this kit to others who also work in this field.

What makes it different: parts that move, connection points, real scale, and a bay assembled in the correct order.

Right after importing, you can open the Demo, explore the bay, operate the disconnectors and connect conductors between the equipment.

I plan to produce more of our equipment to grow the collection.

WHAT IS INSIDE

• 14 prefabs: live-tank circuit breaker; centre-break, double-break and semi-pantograph disconnectors; current transformer; voltage transformer; surge arrester; post insulator; line trap; single and double insulator strings; gantry; gantry with switch beam; 138/13.8 kV power transformer.

• A 1.75 m scale figure.

• 2 scenes: Demo_Bay138kV, a complete line bay in the real order of equipment, and Showcase, every piece side by side.

• Scripts: OperablePart (Open / Close / Toggle), ConnectionPoint on every terminal, ConductorSpan (links two points with sag and radius, in the editor and at runtime) and KitDemoController (orbit camera, click a part to open or close it, O opens all, C closes all).

• 8 shared PBR materials, 24 tileable textures 1024 × 1024 (albedo, normal, metallic + smoothness), label atlas 256 × 256.

• Documentation in PDF.

MADE FOR REAL-TIME

• 3 LODs per prefab with LOD Group, primitive colliders, 8 materials shared by the whole kit (SRP Batcher), UV2 generated on import.

• Demo scene: 552 k triangles, 184 renderers, 1 307 fps average and 580 fps 1 % low in a 60-second player build (RTX 4050, 1920 × 1080).

COMPATIBILITY

• Unity 6000.0 LTS or newer.

• URP out of the box. Built-in Render Pipeline: import Extras/BuiltInRP_Materials.unitypackage. HDRP is not supported.

• No dependencies. The Input System package is optional.

GOOD TO KNOW

• The models are generic, based on typical 138 kV dimensions; they do not reproduce any manufacturer's product.

• ConductorSpan uses a parabola, a close approximation of the catenary up to about 10 % sag.

Support: arkeh3d@gmail.com · https://arkeh3d.github.io