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LB7-132(110,66) Outdoor oil-immersed type 132kv current transformer
feature
1, It is oil insulation system, the primary insulation is would from high voltage cable paper, and is placed several capacitor screen of voltage division in the primary insulation, which can improve electric field distributing and decrease the consumption of insulation material.
2, It will be immersed with transformer oil after desiccating under vacuum. It has advantage of stable and reliable performance of insulation, rich successful experience, a long life time and convenient maintenance.
3, Perfect fluidity performance of transformer oil is good for heat dissipation, it also has self recover ability for the failure of partial discharge caused by air bubble and dust.
Technical data
Rated primary voltage | 132(110,66)kv |
Highest voltage for equipment | 145(126,72.5)kv |
Rated frequency | 50 or 60 Hz |
Rated current ratio | 2×30-2×1000/5or 1A |
Number of secondary windings | 1-5 |
Accuracy of measuring winding | 0.2, 0.2s, 0.5, 0.5s |
Accuracy of production winding | 5p or 10p |
Rated secondary output | 20-50va |
Accuracy limit factor | 15, 20, 25, 30 |
Instrument security factor | ≤5 or ≤10 |
Partial discharge under 1.2Um/√3Kv | ≤5Pc |
Dielectric dissipation factor tg under 10KV-Um/3Kv | ≤0.005 |
Power frequency withstand voltage on primary windings | 230(275)kv 200(230)kv 140kv rms |
Rated lightning impulse withstand voltage | 550(650)kv 450(550)kv 325kv peak |
Power frequency withstand voltage between primary sections | 3kv rms |
Power frequency withstand voltage on earth screen to earth | 5kv rms |
Power frequency withstand voltage on secondary windings and secondary windings to earth | 3kv rms |
secondary winding inter-turn withstand voltage | 4.5kv peak |
Mechanical strength(three direction) | 2000N |
LB7-132(110,66) Outdoor oil-immersed type 132KV current transformer