Electrical resistors – Mechanically variable – Liquid resistance element
Patent
1975-11-25
1977-02-22
Truhe, J. V.
Electrical resistors
Mechanically variable
Liquid resistance element
200195, 323 99, 361121, H01C 1002
Patent
active
040094626
ABSTRACT:
A fast actuating water resistor of high power, especially for use in thermal power plants for transient assumption of loads in the event of a rapid reduction in load in the electrical system supplied by the plant or faults within the system includes a low-pressure steam boiler containing a pressurized hot highly conductive aqueous solution such as brine which is ejected from a ring-shaped nozzle producing an annular conical jet spray through a tubular electrode having a truncated conical configuration. The nozzle and electrode are located in a tank which also contains a grounded collecting grid on which the spray impinges after passing through the electrode which is electrically connected to a bus bar lead passing out of the tank to one of the phases of the electrical power system supplied by the plant. A small portion of the jet of hot solution is vaporized while travelling to the electrode to the collecting grid thereby to establish an electrical connection from the bus bar lead through the electrode to the collecting grid. A supplementary water distributor located in the tank above the tubular electrode and bus bar lead replaces the vaporized water and simultaneously sprays water having a low electrical conductivity onto the supports for these two components so as to wash off any deposits of the highly conductive brine solution which is sprayed in. A sump located at the bottom of the tank returns the fluid collecting in it by a pump to the inlet of the steam boiler through a non-return valve.
REFERENCES:
patent: 1217473 (1917-02-01), Mace
patent: 1258050 (1918-03-01), Simmon
patent: 2930875 (1960-03-01), Waldvogel
BBC Brown Boveri & Company Limited
Tone David A.
Truhe J. V.
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