C.I.G.R.E. <br/><br/>
CE/SC 34 GT/WG 03-1986: Use of Equipment built-in automatic self-checking and monitoring with a view in improving reliability. Study Committee 34 (Protection) October 1986 

 - Paris  CIGRE  Oct. 1986 
 - 45 
<br/><br/><label>Universal Decimal Class. No.: </label>621.31  / GAN.86