Brook Crompton 12-Lead Wye-Delta IEC Motor Wiring Diagram
This resource provides the official Brook Crompton wiring diagram for IEC 12-lead, three-phase motors configured for Wye Start / Delta Run operation. The diagram clearly illustrates correct terminal connections for both low-voltage and high-voltage start and run conditions, helping electricians, technicians, and engineers ensure proper motor installation and safe startup. This document is commonly used for industrial motor installations where reduced inrush current and controlled starting torque are required.
Key Points
- Covers 12-lead IEC three-phase motors with Wye-Delta starting configurations
- Clearly shows Wye Start and Delta Run terminal connections
- Includes wiring layouts for low-voltage and high-voltage operation
- Uses standard IEC terminal designations (U1–U6, V1–V6, W1–W6)
- Helps reduce starting current and mechanical stress during motor startup
- Includes terminal hardware torque specifications for proper installation