B2 - Overhead lines
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A1
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A2
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A3 - Transmission & distribution equipment
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B1 - Insulated cables
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B2 - Overhead lines
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B3 - Substations and electrical installations
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B4 - DC systems and power electronics
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B5 - Protection and automation
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C1 - Power system development and economics
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C2 - Power system operation and control
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C3 - Power System Sustainability and Environmental Performance
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C4 - Power system technical performance
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C4 - Power system technical performance
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C6 - Active distribution systems and distributed energy resources
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D1 - Materials and emerging test techniques
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D2 - Information Systems, Telecommunications and Cybersecurity