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Non-excited cage-type tap changer (66 kV and below)
De-energized cage-form tap-changer (66kV and below)
This switch is available in both horizontal and vertical configurations and is typically used with three-phase and single-phase oil-immersed power transformers operating at frequencies of 50 or 60 Hz, with maximum voltages ranging from 12 to 72.5 kV and rated currents from 63 to 1000 A. The tap‑changing mechanism may be either central or neutral‑point type, and the switch can be directly mounted on the transformer tank cover or tank wall. Tap changes are performed under no‑excitation conditions.
This type of tap-changer has two kinds of products, they are of vertical type and horizontal type. It is usually used in three-phase and single -phase oil-immersed power transformer with frequency of 50，60Hz，highest voltage for equipment 12~ 72.5kV, rated current from 63A to 1000A, it can be regulated on middle or neutral terminal. It can be equipped directly on transformer tank or transformer tank wall working under non-energized condition.
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Non-excitation cage-type tap changer
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