Bus zone current differential protection scheme for stations / 
Central Board of Irrigation and Power, Tamilnadu (India) 
 - New Delhi :  Govt. Press ,  1977 
 - 19 p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric power transmission<br/>Electric currents--Grounding
<br/><br/><label>Dewey Class. No.: </label>621.3178