Lb7-220 (W1, W2, W3, Gy, gyw2) current transformer
■ Executive Standards
The product performance meets the national standard gb1208 current transformer
■ product structure and performance characteristics
This type of transformer is single-phase and capacitive insulation structure. The transformer is composed of body, porcelain bushing, metal expander, oil tank, etc. the body includes primary winding and 6 secondary windings. The primary winding is in "U" shape, and the main insulation is capacitive insulation. The electric screen voltage sharing structure is adopted. Through the optimized design of main insulation and advanced vacuum drying process, the insulation performance of the product is stable and reliable. The primary winding is divided into two groups and four outgoing lines are led out through the upper side wall of the porcelain bushing, which can be conveniently connected in series and parallel outside the product to change the current ratio. The iron core adopts high-quality cold-rolled silicon steel sheet (or super microcrystalline alloy), which has the characteristics of high measurement accuracy and high accuracy limit coefficient.
Bt-220 current transformer is a kind of current transformer with transient protection characteristics, which can not only meet the requirements of steady-state protection, but also meet the requirements of fast relay protection and automatic reclosing
■ ordering instructions
When ordering, please indicate the product model, rated current ratio, number and level combination of secondary windings, whether the secondary winding has tap, secondary load and external insulation pollution level.
If the product is used in plateau area, please indicate the altitude.
The primary wiring board is generally a horizontal installation structure, which can be changed to a vertical installation structure if required by the user.
For products with special requirements, please consult with our technical department.
1. Metal expander; 2. Oil level observer; 3. Connecting piece; 4. Primary outlet terminal; 5. Porcelain bushing; 6. Oil tank; 7 secondary outlet box; 8. Grounding bolt; 9. Oil drain valve