SF6 gas insulated high-voltage instrument transformer
max. 4 000 A, 362 - 550 kV | SF6
Trench Group
Features:
. Explosion proof design with compressible SF6 gas
insulation system and rupture disc.
. Available with porcelain or composite insulators
. Excellent seismic performance
. Head type design with voltage transformer section
located on top of the current transformer
. Cast aluminium housing. Low weight and compact
SF6 design
. Excellent short - circuit performance/capability
. Ferro resonance free design with or without external
damping device depending of client substation layout.
. Essentially unaffected by external stray magnetic fields
. Optimal field grading accomplished by a fine condenser
grading system
. Stable accuracy over a long period of time
. Maintenance free
. No insulation ageing
. Remote supervision of insulation condition by
monitoring internal gas density
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