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Help CenterLB6-110 Outdoor Oil-Immersed Type Current Transformer
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Specifications
It is outdoor, single phase and oil immersed hair-pin type current transformer,good performance, easy installationStructure Feature
It is oil/paper insulation system, the primary insulation is wound from high voltage cable paper, and is placed several capacitor screen of voltage division in the primaty insulation, which can improve electric field distribuding and decrease the consumption of insulation material. It will be immersed with transformer oil after desiccation under vacuum. It has advantages of stable and reliable performance of insulation, rich successful experience, a long life time and convenient maintenance.
Perfect fluidity performance of transformer oil is good fot heat dissipation, it also has self recover ability for the failure of partial discharge caused by air bubble and dust.
The current ratio can be changed easily by change the connection method of connectiong plate on oil conservator to series or parallel connection.
Hermetically sealed stainless steel metallic bellows is installed on the top, which protect the transformer oil from moisture and extend the life time, also there is a oil level gauge on the bellows for observing the changing of oil volume.
There is a multi function oil drain valve on the base, which make it more convient for sampling, draining and refilling.
The ptimary terminal and secondary terminal of earth screen in the terminal box.
The oil conservator and base etc use DACRAL (Zinc/Chromate coationgs) for resistance to corrosion, which gives a high degree of corrosion resistance.
The primary over-boltage protection device and secondary open circuit over-voltage protection device can be provided according to the requirements of user.
Technical Data
| Rated Voltage | 110kV, 132kV |
| Highest voltage for equipment | 126kV, 145kV |
| Rated frequency | 50 or 60 Hz2*30~2*1000/5 or 1A |
| Rated transformation ratio | 1~6 |
| Number of secondary windings | 0.2, 0.25, 0.5, 0.55 |
| Accuracy of measuring winding | 5P or 10P |
| Accuracy of protection winding | 20~50kV |
| Rated secondary output | 15,20,25,30 |
| Accuracy limit factors | ≤ 5 or 10 |
| Instrument security factor | ≤ 5pc |
| External insulation creepage distance(mm) |
W1/2760mm; W2/3150mm; W3/3906mm |
| Power frequency withstand voltage on primery windings | 185(230)(275)kV rms |
| Rated lighting impulse withstand voltage | 450(559)(650)kV rms |
| Power frequency withstand voltage between primary | 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 |
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