Electrical Mining Installations
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In our eReader you can find the full English version of the book. Read Electrical Mining Installations Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Electrical Mining Installations
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In addition to the requirements above referred to, this gate-end box has several automatic features, designed to prevent any possibility of accident, even in the hands of the most careless operator. It will automatically interrupt the supply in the event of (a) Persistent overload ; (b) Short- circuit between phases ; (c) A fault between any phase and earth ; (d) No voltage or failure of supply ; (e) A break or bad contact in the earth circuit. The gate-end switch cannot be closed unless the ea...rth connexion is complete, and it may be opened by operating a small lever attached to the coal cutter or other portable machine.
The Fisher system involves the use of a trailing cable having a pilot or subsidiary wire, in addition to an earth conductor.
The gate-end switch is controlled by a solenoid in circuit with the pilot and earth conductor, so that, if the earth circuit is incomplete, current cannot pass through the solenoid, and it is impossible to close the switch.
\ Fig. 20 shows the arrangement for a three-phase supply with earthed neutral.
What to read after Electrical Mining Installations?
You can find similar books in the "Read Also" column, or choose other free books by P W Percy William Freudemacher to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In addition to the requirements above referred to, this gate-end box has several automatic features, designed to prevent any possibility of accident, even in the hands of the most careless operator. It will automatically interrupt the supply in the event of (a) Persistent overload ; (b) Short- circuit between phases ; (c) A fault between any phase and earth ; (d) No voltage or failure of supply ; (e) A break or bad contact in the earth circuit. The gate-end switch cannot be closed unless the ea...rth connexion is complete, and it may be opened by operating a small lever attached to the coal cutter or other portable machine.
The Fisher system involves the use of a trailing cable having a pilot or subsidiary wire, in addition to an earth conductor.
The gate-end switch is controlled by a solenoid in circuit with the pilot and earth conductor, so that, if the earth circuit is incomplete, current cannot pass through the solenoid, and it is impossible to close the switch.
\ Fig. 20 shows the arrangement for a three-phase supply with earthed neutral.
What to read after Electrical Mining Installations?
You can find similar books in the "Read Also" column, or choose other free books by P W Percy William Freudemacher to read onlineMoreLess
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