Introduction
This Lightning Arrester for Transformer AutoCAD DWG drawing provides a detailed design of a pole-mounted transformer with surge protection, including lightning arresters, fuse cutouts, and grounding connections.
It’s ideal for electrical engineers and distribution designers working on 11 kV / 22 kV / 33 kV pole-mounted substations or rural distribution systems.
1. Drawing Information
| Feature | Description |
|---|---|
| File Format | DWG (AutoCAD 2007 and later) |
| Views Included | Front View & Side View |
| Voltage Rating | 22 kV / 400 V Transformer |
| Category | Electrical / Distribution System |
| Components Included | Transformer, Arrester, Drop Fuse, Cross Arm, Ground System |
| Compatibility | AutoCAD, BricsCAD, DraftSight, GstarCAD |
🧩 The drawing includes accurate annotations, pole dimensions, and mounting details for quick site or tender reference.
2. Key Components
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⚡ Lightning Arrester – 24 kV 5 kA, mounted on channel steel bracket.
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🔌 Transformer – 1 × 250 kVA, 22 kV / 400 V (3-phase).
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🔒 Drop-Out Fuse (DOF) – 33 kV 100 A with fuse link.
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🪜 Cable Ladder w/ Cover – Ø 40 mm (Hot Dip Galv.).
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🧱 Concrete Pole – 12 m length with stub foundation.
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⚙️ Cross Arm & Channel Steel Beams – for suspension and line support.
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🌍 Ground Rod & Earth Conductor – Ø 16 mm rod × 2 m, connected to ground wire.
3. Installation Details
| Parameter | Description |
|---|---|
| Pole Height | 12 m Concrete Pole |
| Beam Size | 150 × 300 × 4600 mm Reinforced Concrete |
| Ground Rod | Ø 5/8″ × 2000 mm Copper Bonded |
| Stub Concrete | Ø 300 × 3.0 m Depth |
| Cross Arm | 120 × 1200 mm Spun Concrete |
| Arrester Mounting Height | Top of pole, near line post insulator |
| Guy Support | Steel guy wire for stability and load balance |
💡 Both front and side views clearly show arrester mounting, fuse connection, transformer secondary, and grounding system.
4. Electrical Connection Summary
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Overhead 22 kV line → Drop-Out Fuse → Lightning Arrester → Transformer Primary
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Transformer Secondary → LV distribution 400 V (3Φ 4W)
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Earth connections bonded at arrester, transformer body, and pole base
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Lightning arrester lead connected to ground rod via Cu conductor
5. Applications
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22 kV / 11 kV distribution lines
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Pole-mounted substations
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Factory and industrial power feeders
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Outdoor transformer installations
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Rural and utility network protection
6. Download Lightning Arrester DWG Drawing
File Size: ~250 KB
License: Free for personal and educational use
7. Design Notes
✅ Follow IEEE Std C62.11 / IEC 60099 for arrester selection
✅ Ensure common earthing bond for transformer and arrester
✅ Maintain minimum 2.5 m clearance from HV lines
✅ Verify fuse rating and phase spacing (829 mm typical)
✅ Inspect ground resistance < 5 Ω before energizing
Conclusion
This Lightning Arrester for Transformer DWG drawing is a complete design reference for incoming-pole substations.
It shows proper mounting, grounding, and electrical connection details to protect distribution transformers from lightning and surge events.
⬇ Download AutoCAD File⚙️ Download now and add this file to your electrical distribution CAD library for professional substation design and installation projects.
