Transformer Lead Pin
- Small support pin for transformer lead / secondary insulators on the pole
- Carries the bushing-to-line lead clear of the tank and pole
- 5/8 in ANSI thread or spool stud; bracket or bolt mount
- Cantilever load to 1,000 lb for light secondary leads
- Cast / forged steel, galvanized to ASTM A-153
- Pairs with spool and secondary-rack insulators
Technical Specifications
| Catalog | Thread / Stud | Mount | Cantilever (lb) | Insulator | Use Case | Surface |
|---|---|---|---|---|---|---|
| RAX-TLP-58 | 5/8 in ANSI | Bolt-through | 800 | Pin / spool | Transformer lead support | HDG |
| RAX-TLP-SP | Spool stud | Bracket | 1,000 | Spool | Secondary lead / drip loop | HDG |
| RAX-TLP-CL | 5/8 in ANSI | Clamp | 800 | Pin | No-drill tank bracket | HDG |
| Custom | Other thread / mount for transformer hardware — send your bracket detail | |||||
Application & Installation
Where it is used
The transformer lead pin supports the insulated lead that runs from a pole-mounted transformer bushing to the line or to the secondary rack. It holds a small pin or spool insulator that keeps the energised lead clear of the tank, bracket and pole during normal service and switching.
Installation sequence
- Mount the pin on the transformer bracket or pole by bolt or clamp.
- Fit the pin / spool insulator onto the stud.
- Dress the transformer lead into the insulator groove.
- Maintain clearance from the tank and other phases.
- Secure the lead so it cannot swing into the structure.
Buyer’s Guide: Transformer Lead Pin
1. What a Transformer Lead Pin Does
A transformer lead pin is a small support spindle that carries a pin or spool insulator for the lead between a pole-mounted transformer bushing and the line or secondary rack. It keeps the energised lead off the tank and pole at a safe, fixed clearance.
2. Pin Thread vs Spool Stud
For a pin insulator the top is a 5/8 in ANSI thread; for a spool insulator it is a spool stud. Choose by the insulator you are using on the lead — spools are common for the slack secondary lead and drip loops.
3. Mounting: Bolt vs Clamp
Bolt-through suits a drilled transformer bracket; a clamp mount grips the bracket edge where you cannot drill. Both hold the small lead loads of a single transformer lead.
4. Cantilever for Light Leads
Transformer leads are light, so ratings to ~1,000 lb cantilever are ample. The job is clearance and security, not high mechanical load — size for a stable mount rather than tension.
5. Pairing With Spool & Secondary Hardware
The lead pin works with spool insulators, secondary racks and clevis hardware to route the transformer lead neatly. Order the matching insulator so the stud and groove fit the lead conductor.
6. Material & Galvanizing
Cast or forged steel, hot-dip galvanized to ASTM A-153 for long pole-top service next to the transformer. Shipped with mounting hardware.
