| 摘要 |
An electrical terminal block has a heat-meltable fusible link establishing a closed electrical circuit between a conductor ans an actuator responsive to a control signal transmitted by conductor for controlling the state of an emergency process control device, such as a shut-off valve. The heat-meltable fusible link melts in response to heat exceeding a predetermined temperature to establish an open electrical circuit between the electrical conductor and the actuator thereby causing the actuator to move the emergency process control device to a safe position or state.
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