Disconnectors are, by definition, only capable of opening and closing a circuit when either negligible current is interrupted or made or when theres no significant change in the voltage across the terminals. In some applications disconnectors are used for transfering load from one bus to the other. While doing so, the disconnector makes the load current to other bus and breaks from the first bus. This operation is carried out at a voltage difference that exists between two buses. This voltage difference is of the order of a few hundred volts which depends on the current to be transferred and the length of the bus. For this switching duty, a disconnector having a breaking and making capability is required. ABB can provide disconnectors with bus-transfer current switching capability.
High Voltage Products
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