PROTECTION,TOROIDAL;INDOOR 660 V;INDOOR, 50 ID & 160 OD HOLE AL83 FOR STH WALES D4X4 & D6X4 INDOOR SWITCHGEAR;RATIO 600/ 400/300/5 AMP;5P20;15 VA ON 400/5 AMP, 20 KA MIN FOR 3 SEC;C/W TERMINALS & LABEL FOR INSTRUMENT CHAMBER;U/W STH WALES PRIMARY BAR GS2411 (SC19970);