Training description

The High Voltage Winding Best Practice training is a high-quality technical course that provides solid knowledge, both practical and theoretical, on best practice operations in High Voltage systems and equipment.

Duration: 2 days
Time: 9 -17 Central European Time (CET)

The  course is divided into 4 sessions:

• Basic AC machine design theory & constrains
• HV Coil insulation & control of partial discharge
• HV Coil manufacturing & testing
• HV Winding best practices

Session 1: Basic AC machine design theory & constraints

Design constraints – Critical design area

• Active surface area D2L, Amperturns/cm, flux & current densities etc
• Coil pitch factors
• Winding distribution factors
• Induction machine winding connections
• Consequent poles
• Lap & wave winding connections
• Concentric windings
• Star / Delta connections
• Control of stray losses using transpositions

Session 2: HV Coil insulation & control of partial discharge

HV Coil insulation basics

• Requirements for coil insulation
• Introduction to dielectric stress
• Introduction to partial discharge
• Insulation temperature classes
• Introduction to mica

HV hot press coil design
Control of partial discharge

Session 3: HV Coil manufacturing & testing

Visual examples of different coil types
Examples of typical coil data sheets
HV Coil manufacturing

• HV coil insulation design
• Production of insulated rectangular conductor
• Coil shaping & insulating; Lap, concentric, half-bar
• Hot pressing for consolidation & slot cell insulation
• VPI insulation system
• Roebel coil design
• Coil testing & coil test standards

Session 4: HV Winding best practice

Recording coil & stator data

• Slot measurement & winding detail, left & right, handed coils
• Wedges, transpositions, endwinding blocking etc
• Core inspection & testing

HV Coil installation & shaping

• Coil fit tolerances in slot, to bracing rings
• Endwinding blocking & bracing
• Multi-turn coil connection
• Stator half-bar alignment & connection
• Coil & Winding testing

Basic partial discharge analysis
Examples of failure modes