Oil-Immersed Load Break Switch

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 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 phase	Insolating insulation between gaps	To ground or inter phase	Insolating insulation between gaps
10	42	48	75	85
20	55	60	125	145
35	95	110	200	215

Type of tap changer	Rated current (A)	Rated Voltage (kV)	Install Dimension (mm)
			H	H1	H2	H3	L	L1
BFY312-10/315-12.5-II	315	10	465	37	86	172	187	102
BFY312-10/630-16-II	630
BFY312-20/315-16-II	315	20	500	43	97	180	222	120
BFY312-20/630-20-II	630
BFY312-35/315-16-II	315	35	540	43	110	195	222	120
BFY312-35/630-20-II	630
BFY311-10/315-16-IV	315	10	525	30	105	195	280	225
BFY311-10/630-20-IV	630
BFY3V1-10/315-16-IV	315
BFY3V1-10/630-20-IV	630
BFY3T2-10/315-16-IV	315		485	30	86	189	206	136
BFY3T2-10/630-20-IV	630
BFY3T1-20/315-16-IV	315	20	540	30	105	210	280	225
BFY3T1-20/630-20-IV	630
BFY3T1-35/315-16-IV	315	35	590	36	114	238	272	176
BFY3T1-35/630-20-IV	630

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Product Categories : Transformer Spare Parts > Transformer Tap Changer