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Coal Generation G7.

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Many old coal mines had their own electrical generators. They were self sufficient and had a good reliable supply for essential equipment like ventilation fans, water pumps, winder winch, lifting gear and coal cutters etc.  In the U.K. in about 1950 colliery generating plants were shut down and the supplies were obtained from the Electricity Boards. This was a bit of a shame really, as unmarketable grades of coal could be used at the colliery generating plants' boilers.


Now Old King Coal is an enemy it appears.

G7 to agree tough measures on burning coal to tackle climate change - BBC News


Z.
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    A lot of colliery generating plant was DC which was falling out of favour by the 1950s.

    Often miners homes near the pit were supplied from the same system. DC was fine for lighting, heating, and early types of radio set, but was not optimum for modern appliances nor for fluorescent lighting.


    DC mains largely "went out with the war", at least for new installations, though use of existing supplies continued until surprisingly recently in a few cases.


    DC mains were generally 3 wire, with 200 to 240 volts from either pole to the earthed venter wire, and 400 to 480 volts between outers for large motors.

    Incandescent street and similar lighting was supplied at the lower voltage. Arc lamps were usually connected between outers with 8 or 9, or 10 arcs in series.


    Some collieries used electrical equipment below ground, but this generally had to be flameproof and was therefore very costly, bulky and heavy.

    Compressed air was often favoured as being safer. The air compressors were above ground and sometimes electric, but steam engine drive was popular.
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  • 0
    A lot of colliery generating plant was DC which was falling out of favour by the 1950s.

    Often miners homes near the pit were supplied from the same system. DC was fine for lighting, heating, and early types of radio set, but was not optimum for modern appliances nor for fluorescent lighting.


    DC mains largely "went out with the war", at least for new installations, though use of existing supplies continued until surprisingly recently in a few cases.


    DC mains were generally 3 wire, with 200 to 240 volts from either pole to the earthed venter wire, and 400 to 480 volts between outers for large motors.

    Incandescent street and similar lighting was supplied at the lower voltage. Arc lamps were usually connected between outers with 8 or 9, or 10 arcs in series.


    Some collieries used electrical equipment below ground, but this generally had to be flameproof and was therefore very costly, bulky and heavy.

    Compressed air was often favoured as being safer. The air compressors were above ground and sometimes electric, but steam engine drive was popular.
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