摘要:
A circuit interrupter includes a frame, a set of separable contacts that can be generally stated as including a stationary contact and a movable contact, the stationary contact being affixed to the frame, a shaft movably situated on the frame, the movable contact being situated on the shaft, a drive system situated on the frame and operable to move the shaft with respect to the frame between a first position and a second position, the set of separable contact being a CLOSED state in the first position of the shaft and being in an OPEN state in the second position of the shaft, and a brake that can be generally stated as including a mass movably situated on the frame, the shaft being structured to engage the mass and to cause the mass to be in motion when moving from the first position toward the second position.
摘要:
A closed and open contact method to predict a usable life of vacuum interrupters in the field can include using computer instructions in the data storage to instruct the processor to position a calculated amp or calculated pressure on an ionic or current versus pressure calibration curve for the installed vacuum interrupter and identify trend data from a library of trend data corresponding to the installed vacuum interrupter and to the calculated pressure or calculated amp of the installed vacuum interrupter; thereby determining the anticipated life expectancy.
摘要:
A closed and open contact method to predict a usable life of vacuum interrupters in the field can include using computer instructions in the data storage to instruct the processor to position a calculated amp or calculated pressure on an ionic or current versus pressure calibration curve for the installed vacuum interrupter and identify trend data from a library of trend data corresponding to the installed vacuum interrupter and to the calculated pressure or calculated amp of the installed vacuum interrupter; thereby determining the anticipated life expectancy.
摘要:
A circuit interrupting device for use with an electrical power distribution system includes a housing containing a circuit interrupting device. A battery tube is positioned in the housing. A battery assembly is configured to be inserted into the battery tube. The battery assembly includes a assembly body having a first end and a second end. A battery is positioned in the assembly body. A cap assembly is connected to the assembly body and configured to connect the battery assembly to the battery tube. The cap assembly includes a torque-limiting device that prevents overtightening of the cap to the battery tube.
摘要:
A closed and open contact method to predict a usable life of vacuum interrupters in the field can include using computer instructions in the data storage to instruct the processor to position a calculated amp or calculated pressure on an ionic or current versus pressure calibration curve for the installed vacuum interrupter and identify trend data from a library of trend data corresponding to the installed vacuum interrupter and to the calculated pressure or calculated amp of the installed vacuum interrupter; thereby determining the anticipated life expectancy.
摘要:
A circuit breaker for protecting a power line. The circuit breaker includes a control unit and a circuit breaking element disconnecting the power line from a power source. The control unit detects a fault on the power line, opens the circuit breaking element, which opening starts a disconnection time interval, injects a test signal into the power line, measures a response, determines an impedance of the power line from the response, analyses the impedance during the time interval based on comparing the impedance with a reference threshold, determines a permanent or a temporary fault based on the analysed impedance, re-closes the circuit breaking element after the time interval if the fault is temporary and keeps the circuit breaking element open after the time interval if the fault is permanent.
摘要:
A switching apparatus for use in conjunction with a fuse, the switching apparatus including a circuit interrupter having a pair of separable contacts, a sensor for sensing a line fault, and an actuator for moving the contacts to an open state when a line fault is sensed, and wherein the switching apparatus is arranged such that the contacts always return to a closed state.
摘要:
A circuit testing closer is capable of closing a power distribution circuit and interrupting the resulting current at the next current zero. Upon detecting a fault, the circuit testing closer is operable to open contacts to isolate the fault. Next, the circuit testing closer tests the faulted line to determine whether the fault has cleared. The circuit testing closer may employ one or more dynamic thresholds to determine the existence of a fault.
摘要:
A circuit testing closer may include a fault isolating switching device coupled between a supply side and a load side of a power distribution system and a current pulse generator coupled in parallel to the switch to generate a current pulse within the power distribution system subsequent to a fault isolation for testing the power distribution system. The current pulse generator may include an electromechanical actuator, an electromagnetic actuator or a solid state switching device. The circuit testing closer may be a purpose-built combination device, or the fault isolating switching device and the current pulse generator may be separately coupled and commonly controlled devices. The fault isolating switching device may have continuous current rating greater than a continuous current rating of the pulse generating device.
摘要:
A fault interrupter and a method of operating a fault interrupter to reduce arcing time during fault interruption. Fault interrupter operation is delayed following detecting a peak current such that its operation occurs at a point of the current wave resulting in reduced arcing during fault isolation.