Ieee standard for qualifying permanent connections used in substation grounding / 
Sponsor substations committee of the ieee power engineering Society 
 - 23 páginas 
 - Ieee std ;  837 (1989) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Corrientes eléctricas--Conexión a tierra
<br/><br/><label>LC Class. No.: </label>TK3227  / I42