Page 380 - Practical Power System and Protective Relays Commissioning

20
30
5
C
1
1
and C 1 1 10 C 1 1 5 C 1 1 10 C 1 1 5 C 1 1 5 C 1 1 20 C 1 3 20 A 1 1 5 A 1 1 5 C 1 1 10 (Continued)
circuits SWG SWG SWG
VT kV kV kV
and 500 220 220
CTs CTs for for for
(6) of of test
in check check check check
above resistance resistance measurement curve interlocking
as point CT of ratio indication indication indication
same gear contact insulation earthing VT and and and and and

GIS switch and of of resistance characteristic test check indication
220 kV 11 kV insulation CTs of VTs of operation operation operation

of of Meaurement confirmation winding test Excitation test High-voltage scheme Operation
Test Test CB DC Kick Kick CB System System System

8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 9.1 9.2 9.3
7 8 9