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Page 190

| Figure 10-13 Disconnecting potheads: (A) two potheads connecting two underground cable lines with two overhead lines. |

| Load-Interrupt Device |

| Another device enables disconnect switches and fuse cut-outs to interrupt circuits safely, essentially by converting them to air-break switches (Fig. 10-16). This accessory device provides the capability for the disconnect to be used for interrupting load and fault currents up to the rating of the device. |

| Handled at the end of an insulated hot-stick, this device is connected between the movable blade and the stationary contact while the disconnect is closed. The device is pulled away with the same stick, thereby opening the disconnect and charging an internal spring at the same time. At a predetermined point in the opening stroke, its internal trigger trips, releasing the spring and separating the internal contacts, thereby interrupting the circuit. An external latch keeps the device in the open position until it is removed from the disconnect or cut-out. Release of the latch prepares the device for the next operation. |

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