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Ningbo Ville Electric Co., Ltd.

Break Switch, Switch, Oil-Immersed Break Switch manufacturer / supplier in China, offering Oil-Immersed Load Break Switch, Capacitor Voltage Transformer, Water Cooled High Current Cable and so on.

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Oil-Immersed Load Break Switch

FOB Price: US $500-7,900,000 / Piece
Min. Order: 1 Piece
Min. Order FOB Price
1 Piece US $500-7,900,000/ Piece
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Production Capacity: 50000 Sets
Transport Package: Wooden Case
Payment Terms: L/C, T/T, D/P, Paypal, Money Gram

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Product Catalog
transformer tap changer
41 Products
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Basic Info
  • Model NO.: "T" Type "V" Type "I" Type bfy
  • Structure: Double-column Disconnector
  • Operation: Electric
  • Movement Mode: Vertical Rotary Type
  • Grounding: Un Grounded
  • Run: Vertical Rotation
  • Common Model: VR
  • Certification: ISO, IS9001, ISO9001, ISO9002, ISO2000
  • Use for: Compounded Type Transformer
  • Installation Position: Tank Well of Compounded Transformer
  • Rated Voltage: 10kv and 35kv
  • Trademark: VILLE
  • Origin: Ningbo
  • Type: Low-voltage
  • Installation: Indoor High-voltage
  • Grounding Mode: Not Grounding
  • Number of Poles: Three Pole
  • Series: Three
  • Switching Mode: Double-Throw Type
  • Structure of Operating: Electric
  • Brand: Ville
  • Classification: Four-Position and Two-Position Products
  • Rated Frequency: 50Hz
  • Rated Current: 315 a and 630A.
  • Specification: IEC CE, ISO
  • HS Code: 8504231100
Product Description
This switch is used for compounded type transformer. It is classified into four-position and two-position products. The four-position switch is divided into "T" type, "V" type and "I". The switch is installed on the tank well of compounded transformer, the transformer oil is used for its insulating and are eliminated material. It is suitable for three phase power supply circuit with rated trequency 50Hz, rated voltage 10kV, 35kV, rated current 315 A and 630A. In the radial feed or loop feed supply system, it is used as controlling and protective device in the industry civil used electric energy. When functioned by operating pole, the switch can drive three phase linkage cut and close power resource or transfer supply method.


The on-load switch our company manufactures has innovative structure, excellent performance and high reliability. It is tested qualified in every technical index b the National Transformer Quality Supervision and Inspection Center. Its main features are as follow:

1. The fixed contact of the same kind product is crab-claw form. With the increasing rotation of the switch, the movable contact wears out more heavily, the pressure fixed contact put onto the movable contact declines, and the contact resistance increases.
We change the fixed contact into clip-chip, and connect it with soft-connecting films, ensuring the contact pressure with cylindrical spring to maintain a high contact pressure after 2000 times shifting and enable a minimum contact resistance of fixed and movable contact. We also use high-quality copper alloy as the contact material to make a lightest damage the arc will do to the contact when the contact shifts on-load, and enlarge the contacting area to improve the current-passing capability.
2. Key components of our switch apply the overall steel casting technology, so the products are with high mechanical strength.
3. Each plate-form spring has a deformation test before assembly to ensure the quality of the spring.
4. We use the latest type of insulation materials to ensure the switch a higher capability of withstand voltage and withstand voltage.
Rated voltage (kV)Power frequency withstand voltage (1min) (kV)Lighting withstand voltage (kV)
To ground or inter phaseInsolating insulation between gapsTo ground or inter phaseInsolating insulation between gaps
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205560125145
3595110200215







Type of tap changerRated current (A)Rated Voltage (kV)Install Dimension (mm)
HH1H2H3LL1
BFY312-10/315-12.5-II315104653786172187102
BFY312-10/630-16-II630
BFY312-20/315-16-II315205004397180222120
BFY312-20/630-20-II630
BFY312-35/315-16-II3153554043110195222120
BFY312-35/630-20-II630
BFY311-10/315-16-IV3151052530105195280225
BFY311-10/630-20-IV630
BFY3V1-10/315-16-IV315
BFY3V1-10/630-20-IV630
BFY3T2-10/315-16-IV3154853086189206136
BFY3T2-10/630-20-IV630
BFY3T1-20/315-16-IV3152054030105210280225
BFY3T1-20/630-20-IV630
BFY3T1-35/315-16-IV3153559036114238272176
BFY3T1-35/630-20-IV630
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