4-3A Special Locator
Elongated bent locator for large-radius curves, turnout areas and other special registration points.
Specifications
| Model | 4-3A |
|---|---|
| Drawing No. | 4-3A |
| Standard | TB/T 2075.4-2024 — Part 4: Non-limit-type positioning devices |
| Installation | Hinged on the registration bracket for special registration points such as large curves and turnouts |
The 4-3A special locator extends the standard locator concept with a longer tube body and a larger head angle, for registration points that the standard geometry cannot reach — large-radius curves, turnout areas and similar special situations.
The connection interfaces remain those of the standard family: the head takes the 3-4A registration clamp and the tail hooks the standard registration bracket, so special points still assemble from common parts. Tube stiffness is balanced against weight to keep dynamic following good.
Design Features
- Elongated bent-tube structure reaches large-curve and special points
- Interfaces unchanged — standard brackets and clamps fit directly
- Stiffness and lightness balanced for good dynamic following
- Anti-corrosion finish for long-term outdoor service
The product is manufactured under CRCC railway product certification and an ISO 9001 quality management system, with incoming material inspection, in-process control on critical operations and batch-by-batch final inspection before delivery.
Henan Chuangwit Railway Equipment Co., Ltd. supplies this locator with selection calculations, matched fittings and site technical guidance for traction power projects. Where the registration geometry exceeds the standard locator's reach or angle — typically large-radius curves and turnout areas — the 4-3A's elongated bent tube covers the point. No — the head takes the standard registration clamp and the tail hooks the standard registration bracket, so it assembles from the same parts family. The tube section is chosen to keep stiffness up while weight stays low, so the locator still follows the wire's movement without added inertia. TB/T 2075.4-2024 — Part 4: Non-limit-type positioning devices, of the Fittings for overhead contact system series.Frequently Asked Questions
When is a special locator needed?
Does it use different clamps or brackets?
How does the longer tube affect dynamics?
Which standard applies?
Performance
Operating Conditions
Outdoor service at OCS registration points on mainline, high-speed and station structures, subject to suspension, wind, ice and dynamic pantograph loads as defined by the OCS design.
Mechanical Performance
Elongated tube tuned for stiffness with low mass, keeping dynamic following at extended registration geometry.
Applications
Large-Radius Curves
Reaches registration points standard locators miss.
Turnout Areas
Special geometry over switches and crossings.
Standard Assemblies
Interfaces match the 4-x family.
Harsh Climates
Anti-corrosion finish for outdoor duty.
