I.L. 41-347.1P TYPE HU, HU-1 AND HU-4 TRANSFORMER DIFFERENTIAL RELAYS MANUAL – Westinghouse

GEI-28802F INSTANTANEOUS VOLTAGE RELAYS TYPES PJV11-J,L,N,AF,AH,AJ,AK,AL,AM,AN,AR,AS,AT,AW,AZ,BF, PJV12-B,C, PJV14-B,C PJV15A MANUAL – General Electric