Description
The Oil-Immersed Transformer Load Tap Changer (LTC) is designed for on-load voltage adjustment, allowing transformers to maintain continuous power supply while regulating voltage.
It is widely used in oil-immersed power transformers, distribution transformers, and industrial transformer systems, providing stable voltage, reduced losses, and high operational safety.
The switch features a drum or cylinder rotary contact design, optimized for long-term reliability and precise tap switching under load conditions.
Applications
-Oil-immersed power transformers
-Distribution transformers
-Industrial transformer systems
-Renewable energy transformers (wind, solar)
-HV / MV grid voltage regulation and substations
Voltage class of load switch should withstand the test voltage in transformer oil shown in following table
Highest voltage for equipment (kV) |
Rated voltage (kV) |
Power frequency withstand voltage(1min) |
Lighting withstand voltage |
||
To ground Or Inter phase |
Insolating insulation between gaps |
To ground Or Inter phase |
Insolating insulation between gaps |
||
| 12 | 10 | 42 | 48 | 75 | 85 |
| 24 | 20 | 55 | 60 | 125 | 145 |
| 40.5 | 35 | 95 | 110 | 200 | 215 |
Type of tap change and installation size chart
Type of tap-changer |
Rated current(A) |
Highest voltage (kV) |
Overall dimension(mm) | |||||
| H | H1 | H2 | H3 | L | L1 | |||
| BFY312-12/315-12.5-Ⅱ | 315 | 12 | 480 | 43 | 86 | 172 | 187 | 102 |
| BFY312-12/630-20-IⅡ | 630 | |||||||
| BFY312-24/315-16-IⅡ | 315 | 24 | 510 | 44 | 97 | 180 | 222 | 140 |
| BFY312-24/630-20-Ⅱ | 630 | |||||||
| BFY312-40.5/315-16-Ⅱ | 315 | 40.5 | 590 | 44 | 130 | 195 | 222 | 140 |
| BFY312-40.5/630-20-Ⅱ | 630 | |||||||
| BFY311-12/315-16-IV | 315 | 12 | 525 | 30 | 105 | 195 | 280 | 225 |
| BFY311-12/630-20-IV | 630 | |||||||
| BFY3V1-12/315-16-IV | 315 | |||||||
| BFY3V1-12/630-20-IV | 630 | |||||||
| BFY3T2-12/315-16-IV | 315 | 485 | 30 | 86 | 189 | 206 | 136 | |
| BFY3T2-12/630-20-IV | 630 | |||||||
| BFY3T2-24/315-16-IV | 315 | 24 | 485 | 30 | 86 | 189 | 206 | 136 |
| BFY3T2-24/630-20-IV | 630 | |||||||
| BFY3T1-40.5/315-16-IV | 315 | 40.5 | 572 | 36 | 114 | 225 | 272 | 176 |
| BFY3T1-40.5/630-20-IV | 630 | |||||||
Overall drawing for two-position load break switch
certificate
FAQ
Q: How long is the delivery time?
A: Generally it is 15-20 days if polyimide film price is in stock, or it is 15-30 days.
Q: Which certification do you have?
A: The plant has passed the certificate of ISO 9001 quality system certification;
The products have passed ROHS test.
Q: Are you trading company or manufacturer?
A: We are manufacturer, having our own factories.
Q: What kind of information we need before place your order?
A: Thickness, Width, Length, Application, Adhesive type
Q: What is the delivery service?
A: Sample order will be shipped by Express, such as DHL, fedEx, UPS, TNT, EMS, etc; Heavy weight goods will be shipped by sea. About 15 to 30days according different country.
Hot Tags: Oil-immersed transformer load changer, China Oil-immersed transformer load changer suppliers, transformer descramblers, transformer smart grid accessories, transformer importers, transformer scramblers, transformer exporters, transformer tapes