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GB858095A
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Improvements in or relating to tap-changing switches
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US2833873A
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Multi-pole tap switch construction for changing transformer taps under load
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GB710184A
|
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On-load tap selector for tapped transformers
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GB705845A
|
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Spring action driving gear with variable torque for on-load changeover switches of regulating transformers
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GB711852A
|
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On-load tap selector for tapped transformers
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US2680790A
|
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Load changeover switch for tapped transformers using a combination of contact movements
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US2691079A
|
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Load tap selector for tapped transformers with several contact circles per phase
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US2723318A
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Load selector for tapped transformers with insulating cylinders unrolling within each other
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US2682030A
|
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Current tap changing system
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US2231627A
|
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Step switch device for regulating transformers
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US1985928A
|
|
Load-change-over switch for step transformers
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GB371414A
|
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Improvements in switch gear for electric transformers
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