Transformer-Mounted Loadbreak Switches

Transformer components

Transformer-Mounted Loadbreak Switches

Configuration-led support for transformer loadbreak switch paths. Start with the switching duty, position count, tank-wall interface, operating arrangement, and available project documentation before confirming a configuration.

Transformer scope: this page covers tank-wall and transformer-mounted switches. For indoor SF6 load break switches used in RMU or GIS cabinets, see SF6 Load Break Switches for RMU & GIS.

Transparent three-phase T-blade loadbreak switch product cutout
Transformer-mounted switch catalogue

TRANSFORMER LOADBREAKSWITCH CONFIGURATIONS

Select the voltage and position group first, then open the relevant product record for the transformer interface and drawing review.

BFYI-25KV 630A J1 Single Phase Load Break Switch 1 transformer-mounted loadbreak switch
15–25 kV · Two-position

BFYI-25KV 630A J1 Single Phase Loadbreak Switch

Review the product arrangement, transformer tank-wall interface, operation, and drawing package before quotation.

BFYI-25KV630A Three-Phase Load Break Switch 3 transformer-mounted loadbreak switch
15–25 kV · Two-position

BFYI-25KV630A Three-Phase Loadbreak Switch

Review the product arrangement, transformer tank-wall interface, operation, and drawing package before quotation.

BFYI-25KV630A-D Three-Phase Pad Mount (under ground type) Load Break Switch 6 transformer-mounted loadbreak switch
15–25 kV · Two-position

BFYI-25KV630A-D Three-Phase Pad Mount (under ground type) Loadbreak Switch

Review the product arrangement, transformer tank-wall interface, operation, and drawing package before quotation.

BFYI-25KV630A-J1L Single-Phase Hinged Cover Type Load Break Switch transformer-mounted loadbreak switch
15–25 kV · Two-position

BFYI-25KV630A-J1L Single-Phase Hinged Cover Type Loadbreak Switch

Review the product arrangement, transformer tank-wall interface, operation, and drawing package before quotation.

BFYI-25KV630A-L Three-Phase Lock Type Load Break Switch 4 transformer-mounted loadbreak switch
15–25 kV · Two-position

BFYI-25KV630A-L Three-Phase Lock Type Loadbreak Switch

Review the product arrangement, transformer tank-wall interface, operation, and drawing package before quotation.

BFYI-25KV630A-P Three-Phase Side-Operation Load Break Switch transformer-mounted loadbreak switch
15–25 kV · Two-position

BFYI-25KV630A-P Three-Phase Side-Operation Loadbreak Switch

Review the product arrangement, transformer tank-wall interface, operation, and drawing package before quotation.

15–25 kV · Two-position

BFYI-25KV 630A J1 Single Phase Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BFYI-25KV 630A J1 Single Phase Load Break Switch 1 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BFYI-25KV 630A J1 Single Phase Loadbreak Switch
Official Suvell parameter sheet — OCR transcript
Serial numberNameUnitFYB-10/315-20FYB-(10-24)/630-25
1Rated voltagekV1024
2Power frequency withstand voltage — ground/interphasekV6565
Isolating distancekV7979
3Lightning impulse withstand voltage — ground/interphasekV125125
Isolating distancekV145145
4Rated currentA315630
5Rated short-circuit withstand currentkA20/4S25/4S
6Rated peak withstand currentkA5063
7Main circuit resistanceμΩ<200<200
8Mechanical lifeOperations>3000>3000
Request engineering review
15–25 kV · Two-position

BFYI-25KV630A Three-Phase Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BFYI-25KV630A Three-Phase Load Break Switch 3 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BFYI-25KV630A Three-Phase Loadbreak Switch
Official Suvell parameter table
Rated Volatge(Phase-to-Phase)15/25kV
Withstand Voltage (50/60Hz)65kV/1min.
BlL and Full Wave Crest125kV
Rated Current630A
Short Time Withstand Current20kA/2s
Mechanical operation life>3000 times
Main circuit resistance<200μΩ
Official Suvell parameter table
Serial NumberNameUnitFYB-10/315-20FYB-(10-24)/630-25
1RatedvoltageKV1024
2Powerfrequency withstandvoltage Ground, interphaseKV65
Isolating distanceKV79
3Lightningimpulse withstandvoltage Ground, interphaseKV125
Isolating distanceKV145
4RatedcurrentA315630
5Ratedshort-circuitwithstandcurrentKA20/4S25/4S
6RatedpeakwithstandcurrentKA5063
7MaincircuitresistanceμΩ<200<200
8MechanicalifeNumberof times>3000
Request engineering review
15–25 kV · Two-position

BFYI-25KV630A-D Three-Phase Pad Mount (under ground type) Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BFYI-25KV630A-D Three-Phase Pad Mount (under ground type) Load Break Switch 6 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BFYI-25KV630A-D Three-Phase Pad Mount (under ground type) Loadbreak Switch
Official Suvell parameter table
Rated Volatge(Phase-to-Phase)15/25kV
Withstand Voltage (50/60Hz)65kV/1min.
BlL and Full Wave Crest125kV
Rated Current630A
Short Time Withstand Current20kA/2s
Mechanical operation life>3000 times
Main circuit resistance<200μΩ
Official Suvell parameter table
Serial NumberNameUnitFYB-10/315-20FYB-(10-24)/630-25
1Rated voltageKV1024
2Power frequency withstand voltage Ground, interphaseKV65
Isolating distanceKV79
3Lightning impulse withstand voltage Ground, interphaseKV125
Isolating distanceKV145
4Rated currentA315630
5Rated short-circuit withstand currentKA20/4S25/4S
6Rated peak withstand currentKA5063
7Main circuit resistanceμΩ<200<200
8Mechanical lifeNumber of times>3000>3000
Request engineering review
15–25 kV · Two-position

BFYI-25KV630A-J1L Single-Phase Hinged Cover Type Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BFYI-25KV630A-J1L Single-Phase Hinged Cover Type Load Break Switch transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BFYI-25KV630A-J1L Single-Phase Hinged Cover Type Loadbreak Switch
Official Suvell parameter table
Rated Volatge(Phase-to-Phase)15/25kV
Withstand Voltage (50/60Hz)65kV/1min.
BlL and Full Wave Crest125kV
Rated Current630A
Short Time Withstand Current20kA/2s
Mechanical operation life>3000 times
Main circuit resistance<200μΩ
Official Suvell parameter table
Serial NumberNameUnitFYB-10/315-20FYB-(10-24)/630-25
1RatedvoltageKV1024
2Powerfrequency withstandvoltage Ground, interphaseKV65
Isolating distanceKV79
3Lightningimpulse withstandvoltage Ground, interphaseKV125
Isolating distanceKV145
4RatedcurrentA315630
5Ratedshort-circuitwithstandcurrentKA20/4S25/4S
6RatedpeakwithstandcurrentKA5063
7MaincircuitresistanceμΩ<200<200
8MechanicalifeNumberof times>3000
Request engineering review
15–25 kV · Two-position

BFYI-25KV630A-L Three-Phase Lock Type Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BFYI-25KV630A-L Three-Phase Lock Type Load Break Switch 4 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BFYI-25KV630A-L Three-Phase Lock Type Loadbreak Switch
Official Suvell parameter table
Rated Volatge(Phase-to-Phase)15/25kV
Withstand Voltage (50/60Hz)65kV/1min.
BlL and Full Wave Crest125kV
Rated Current630A
Short Time Withstand Current20kA/2s
Mechanical operation life>3000 times
Main circuit resistance<200μΩ
Official Suvell parameter table
NameUnitFYB-10/315-20
1Rated voltageKV1024
2Power frequency withstand voltage Ground, interphaseKV65
Isolating distanceKV79
3Lightning impulse withstand voltage Ground, interphaseKV125
Isolating distanceKV145
4Rated currentA315630
5Rated short-circuit withstand currentKA20/4S25/4S
6Rated peak withstand currentKA5063
7Main circuit resistanceμΩ<200<200
8Mechanical lifeNumber of times>3000>3000
Request engineering review
15–25 kV · Two-position

BFYI-25KV630A-P Three-Phase Side-Operation Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BFYI-25KV630A-P Three-Phase Side-Operation Load Break Switch transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BFYI-25KV630A-P Three-Phase Side-Operation Loadbreak Switch
Official Suvell parameter table
Rated Volatge(Phase-to-Phase)15/25kV
Withstand Voltage (50/60Hz)55kV/1min.
BlL and Full Wave Crest125kV
Rated Current630A
Short Time Withstand Current20kA/2s
Mechanical operation life>2000 times
Main circuit resistance<200μΩ
Request engineering review
15–25 kV · Four-position

FYN33-25KV630A-25 Three-Phase T-Blade Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

FYN33-25KV630A-25 Three-Phase T-Blade Load Break Switch 2 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-25KV630A-25 Three-Phase T-Blade Loadbreak Switch
Official Suvell parameter sheet — OCR transcript
NameUnitFYN33-12/630FYN33-40.5/630
Rated voltagekV1240.5
1 min power-frequency withstand voltage — earth/interphasekV4295
1 min power-frequency withstand voltage — isolation clearancekV48118
Lightning surge withstand voltage — earth/interphasekV75200
Lightning surge withstand voltage — isolation clearancekV85215
Rated currentA630630
Rated thermostable current / 2S, 4SkA20/2S25/4S
Rated dynamic currentkA5063
Loop resistanceμΩ>200>200
Mechanical lifeTimes>2000>2000
Request engineering review
15–25 kV · Four-position

FYN33-25KV630A-25-D Three-Phase Embedded Type Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

FYN33-25KV630A-25-D Three-Phase Embedded Type Load Break Switch 5 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-25KV630A-25-D Three-Phase Embedded Type Loadbreak Switch
Official Suvell parameter table
No.Parameter NameUnitFYN33-12/630FYN33-24/630FYN33-40.5/630
1Rated VoltagekV122440.5
2Power Frequency Withstand Voltage Ground/Phase-to-PhasekV426595
Isolating DistancekV4879118
3Lightning Impulse Withstand Voltage Ground/Phase-to-PhasekV75125200
Isolating DistancekV85145215
4Rated CurrentA630
5Rated Short-Time Withstand CurrentkA/s20/225/431.5/4
6Rated Peak Withstand CurrentkA506380
7Main Circuit ResistanceμΩ<200
8Mechanical LifeOperations>3000
Request engineering review
15–25 kV · Four-position

FYN33-25KV630A-25-J1 Single-Phase T-Blade Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

FYN33-25KV630A-25-J1 Single-Phase T-Blade Load Break Switch 1 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-25KV630A-25-J1 Single-Phase T-Blade Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitYZFN-20/315-RYZFN-20/630-R
1Rated voltageKV24
2Power frequency withstand voltage Ground, interphaseKV55
Isolating distanceKV60
3Lightning impulse withstand voltage Ground, interphaseKV125
Isolating distanceKV145
4Rated currentA315630
5Rated short-circuit withstand current (2S)KA2020
6Rated peak withstand currentKA5050
7Main circuit resistanceμΩ<320 <200<200 <200
8Operating torqueN.m<50 <50
9Mechanical lifeNumber of times>2000
Request engineering review
15–25 kV · Four-position

FYN33-25KV630A-25-J1-MBB Single-Phase Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

FYN33-25KV630A-25-J1-MBB Single-Phase Load Break Switch 3 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-25KV630A-25-J1-MBB Single-Phase Loadbreak Switch
Official Suvell parameter table
No.Parameter NameUnitFYN33-12/630FYN33-24/630FYN33-40.5/630
1Rated VoltagekV122440.5
2Power Frequency Withstand Voltage Ground/Phase-to-PhasekV426595
Isolating DistancekV4879118
3Lightning Impulse Withstand Voltage Ground/Phase-to-PhasekV75125200
Isolating DistancekV85145215
4Rated CurrentA630
5Rated Short-Time Withstand CurrentkA/s20/225/431.5/4
6Rated Peak Withstand CurrentkA506380
7Main Circuit ResistanceμΩ<200
8Mechanical LifeOperations>3000
Request engineering review
15–25 kV · Four-position

FYN33-25KV630A-25-MBB Three-Phase Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

FYN33-25KV630A-25-MBB Three-Phase Load Break Switch 4 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-25KV630A-25-MBB Three-Phase Loadbreak Switch
Official Suvell parameter table
No.Parameter NameUnitFYN33-12/630FYN33-24/630FYN33-40.5/630
1Rated VoltagekV122440.5
2Power Frequency Withstand Voltage Ground/Phase-to-PhasekV426595
Isolating DistancekV4879118
3Lightning Impulse Withstand Voltage Ground/Phase-to-PhasekV75125200
Isolating DistancekV85145215
4Rated CurrentA630
5Rated Short-Time Withstand CurrentkA/s20/225/431.5/4
6Rated Peak Withstand CurrentkA506380
7Main Circuit ResistanceμΩ<200
8Mechanical LifeOperations>3000
Request engineering review
15–25 kV · Four-position

YZFN-20KV630A-20-J1 Single-Phase Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

YZFN-20KV630A-20-J1 Single-Phase Load Break Switch 1 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for YZFN-20KV630A-20-J1 Single-Phase Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitYZFN-20/315-RYZFN-20/630-R
1Rated voltageKV24
2Power frequency withstand voltage Ground, interphaseKV55
Isolating distanceKV60
3Lightning impulse withstand voltage Ground, interphaseKV125
Isolating distanceKV145
4Rated currentA315630
5Rated short-circuit withstand current (2S)KA2020
6Rated peak withstand currentKA5050
7Main circuit resistanceμΩ<320 <200<200 <200
Request engineering review
15–25 kV · Four-position

YZFN-20KV630A-20-S Three-Phase Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

YZFN-20KV630A-20-S Three-Phase Load Break Switch 4 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for YZFN-20KV630A-20-S Three-Phase Loadbreak Switch
Official Suvell parameter table
NumberNameUnitYZFN-20/315-RYZFN-20/630-R
1Rated voltageKV24
2Power frequency withstand voltage Ground, interphaseKV55
Isolating distanceKV60
3Lightning impulse withstand voltage Ground, interphaseKV125
Isolating distanceKV145
4Rated currentA315630
5Rated short-circuit withstand current (2S)KA2020
6Rated peak withstand currentKA5050
7Main circuit resistanceμΩ<320<200
8Operating torqueN.m<50
9Mechanical lifeNumber of times>2000
Request engineering review
15–25 kV · Four-position

YZFN-20KV630A-20-T Three-Phase Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

YZFN-20KV630A-20-T Three-Phase Load Break Switch 2 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for YZFN-20KV630A-20-T Three-Phase Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitYZFN-20/315-RYZFN-20/630-R
1Rated voltageKV24
2Power frequency withstand voltage Ground, interphaseKV55
Isolating distanceKV60
3Lightning impulse withstand voltage Ground, interphaseKV125
Isolating distanceKV145
4Rated currentA315630
5Rated short-circuit withstand current (2S)KA2020
6Rated peak withstand currentKA5050
7Main circuit resistanceμΩ<320 <200<200 <200
Request engineering review
15–25 kV · Four-position

YZFN-20KV630A-20-V Three-Phase Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

YZFN-20KV630A-20-V Three Phase Load Break Switch 3 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for YZFN-20KV630A-20-V Three-Phase Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitYZFN-20/315-RYZFN-20/630-R
1Rated voltageKV24
2Power frequency withstand voltage Ground, interphaseKV55
Isolating distanceKV60
3Lightning impulse withstand voltage Ground, interphaseKV125
Isolating distanceKV145
4Rated currentA315630
5Rated short-circuit withstand current (2S)KA2020
6Rated peak withstand currentKA5050
7Main circuit resistanceμΩ<320 <200<200 <200
8Operating torqueN.m<50 <50
9Mechanical lifeNumber of times>2000
Request engineering review
35 kV · Two-position

BYFI-40.5KV630A-25-J1 Single-Phase Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BYFI-40.5KV630A-25-J1 Single-Phase Load Break Switch 4 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BYFI-40.5KV630A-25-J1 Single-Phase Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitBYFI-40.5/630-20BYFI-40.5/630-25BYFI-40.5/630-31.5
1Rated voltageKV40.5
2Power frequency withstand voltage Ground, interphaseKV95
Isolating distanceKV118
3Lightning impulse withstand voltage Ground, interphaseKV200
Isolating distanceKV215
4Rated current /4S/2SA630
5Rated short-circuit withstand current /4S/2SKA20/2S25/4S31.5/4S
6Rated peak withstand currentKA506380
7Main circuit resistanceμΩ<200<200<200
8Mechanical lifeNumber of times>3000>3000>3000
Request engineering review
35 kV · Two-position

BYFI-40.5KV630A-25Three-Phase Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BYFI-40.5KV630A-25Three-Phase Load Break Switch 2 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BYFI-40.5KV630A-25Three-Phase Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitBYFI-40.5/630-20BYFI-40.5/630-25BYFI-40.5/630-31.5
1Rated voltageKV40.5
2Power frequency withstand voltage Ground, interphaseKV95
Isolating distanceKV118
3Lightning impulse withstand voltage Ground, interphaseKV200
Isolating distanceKV215
4Rated current /4S/2SA630630630
5Rated short-circuit withstand current /4S/2SKA20/2S25/4S31.5/4S
6Rated peak withstand currentKA506380
7Main circuit resistanceμΩ<200<200<200
8Mechanical lifeNumber of times>3000>3000>3000
Request engineering review
35 kV · Two-position

BYFI-40.5KV630A-L Three-Phase Lock Type Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

BYFI-40.5KV630A-L Three-Phase Lock Type Load Break Switch 3 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BYFI-40.5KV630A-L Three-Phase Lock Type Loadbreak Switch
Official Suvell parameter table
Rated Voltage(Phase-to-Phase)38kV
Withstand Voltage (50/60Hz)95kv/1min
BlL and Full Wave Crest200kv
Rated Current630A
Short Time Withstand Current25kA/4S
Mechanical operation life>2000 times
Main circuit resistance<200μΩ
Request engineering review
35 kV · Two-position

BYFI-40.5KV630A-L-Single-Phase Lock Type Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

BYFI-40.5KV630A-L-Single-Phase Lock Type Load Break Switch 1 transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for BYFI-40.5KV630A-L-Single-Phase Lock Type Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitBYFI-40.5/630-20BYFI-40.5/630-25BYFI-40.5/630-31.5
1Rated voltageKV40.5
2Power frequency withstand voltage Ground, interphaseKV95
Isolating distanceKV118
3Lightning impulse withstand voltage Ground, interphaseKV200
Isolating distanceKV215
4Rated current /4S/2SA630
5Rated short-circuit withstand current /4S/2SKA20/2S25/4S31.5/4S
6Rated peak withstand currentKA506380
7Main circuit resistanceμΩ<200<200<200
8Mechanical lifeNumber of times>3000>3000>3000
Request engineering review
35 kV · Four-position

FYN33-40.5KV630A-25 Three-phase T-Blade Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

FYN33-40.5KV630A-25 Three-phase T-Blade Load Break Switch transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-40.5KV630A-25 Three-phase T-Blade Loadbreak Switch
Official Suvell parameter table
ParameterUnitFYN33-12/630FYN33-24/630FYN33-40.5/630
1Rated voltagekV122440.5
2Power frequency withstand voltage
– Ground, interphasekV426595
– Isolating distancekV4879118
3Lightning impulse withstand voltage
– Ground, interphasekV75125200
– Isolating distancekV85145215
4Rated currentA630630630
5Rated short-circuit withstand currentkA20/2s25/4s31.5/4s
6Rated peak withstand currentkA506380
7Main circuit resistanceμΩ<200<200<200
8Mechanical lifeTimes>3000>3000>3000
Request engineering review
35 kV · Four-position

FYN33-40.5KV630A-25-J1 Single-phase T-Blade Loadbreak Switch

Official Suvell product record. The parameter table and drawing below are archived from Suvell.com.

FYN33-40.5KV630A-25-J1 Single-phase T-Blade Load Break Switch transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-40.5KV630A-25-J1 Single-phase T-Blade Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitFYN33-12/630FYN33-24/630FYN33-40.5/630
1Rated voltagekV122440.5
2Power frequency withstand voltageGround, interphasekV426595
Isolating distancekV4879118
3Lightning impulse withstand voltageGround, interphasekV75125200
Isolating distancekV85145215
4Rated currentA630630630
5Rated short-circuit withstand currentkA20/2s25/4s31.5/4s
6Rated peak withstand currentkA506380
7Main circuit resistanceμΩ<200<200<200
8Mechanical lifeNumber of times>3000>3000>3000
Request engineering review
35 kV · Four-position

FYN33-40.5KV630A-25-J1-MBB Single-phase Semicircular Loadbreak Switch

Official Suvell series reference. The parameter table and drawing below are archived from Suvell.com.

FYN33-40.5KV630A-25-J1-MBB Single-phase Semicircular Load Break Switch transformer-mounted loadbreak switch
Official Suvell dimension / drawing
Suvell official dimension or drawing for FYN33-40.5KV630A-25-J1-MBB Single-phase Semicircular Loadbreak Switch
Official Suvell parameter table
Serial NumberNameUnitFYN33-12/630FYN33-24/630FYN33-40.5/630
1Rated voltagekV122440.5
2Power frequency withstand voltageGround, interphasekV426595
Isolating distancekV4879118
3Lightning impulse withstand voltageGround, interphasekV75125200
Isolating distancekV85145215
4Rated currentA630630630
5Rated short-circuit withstand currentkA20/2s25/4s31.5/4s
6Rated peak withstand currentkA506380
7Main circuit resistanceμΩ<200<200<200
8Mechanical lifeNumber of times>3000>3000>3000
Request engineering review
Transformer loadbreak switch / engineering handoff

Engineer the transformer-mountedloadbreak switch interface

For transformer-mounted loadbreak switches in oil-immersed and pad-mounted transformer applications, use the product record as the selection start. Before RFQ, confirm voltage class, two- or four-position arrangement, phase configuration, rated-current duty, tank-wall geometry, operating access, and the applicable drawing package.

External operating side Transformer tank wall Internal switching connection Transformer-mounted loadbreak switch engineering review topology
Illustrative engineering-review topology. Confirm the final transformer-mounted loadbreak switch interface against the selected drawing and project package.

Review the loadbreak switch engineering inputs

System duty and switching arrangement

Provide the voltage class, required rated-current duty, two- or four-position operation, phase layout, transformer connection requirement, and any specified utility or project standard.

Tank-wall mounting and operating access

Provide the mounting face, opening or flange details, sealing condition, clearance envelope, handle or shaft orientation, and transformer layout for interface review.

Drawing and procurement evidence

Include the selected product record, drawings, nameplate data, interface photos, quantity, destination, inspection requirements, and delivery basis to establish the engineering RFQ.

Prepare a project-ready loadbreak switch RFQ.

Keep the selected configuration, transformer interface, drawing evidence, inspection expectations, and delivery conditions in one package so engineering review starts from a defined basis.

View Suvell source record
Suvell source reference for transformer loadbreak switch factory environment

Configuration and interface review

Match the selected two-position or four-position transformer loadbreak switch to the voltage class, phase arrangement, switching duty, tank-wall mounting, and operator access shown in the project package.

Suvell source reference for transformer loadbreak switch production line 01

Inspection and documentation requirements

State the required drawing revision, nameplate content, inspection hold points, traceability, test records, and acceptance documents before production review.

Suvell source reference for transformer loadbreak switch production line 02

Packing and delivery conditions

Provide quantity, destination, packing basis, handling constraints, requested delivery date, and applicable project or utility documentation for the RFQ.

Transformer loadbreak switch / project release preparation

Production, packing& project release

Prepare the selected product configuration, identification requirements, quantity, destination, packing method, delivery date, and requested release documents as one project package. These Suvell workshop images provide first-party production and handling context; final packing and acceptance requirements remain project-specific.

Suvell factory workshop source showing packed materials and dispatch staging
Packing and dispatch stagingSuvell workshop source
Suvell factory workshop source showing inspection and finishing workstations
Inspection and finishing areaSuvell workshop source
Suvell factory workshop source showing an insulated-component production environment
Production environmentSuvell workshop source
Engineering selection FAQ

Loadbreak switchFAQ

Use these answers to distinguish the product-record information available in each modal from the mounting, operating, and interface details that require drawing and project confirmation before quotation.

What information is needed to select a loadbreak switch path?

Provide the transformer application, switching duty, required position count, phase arrangement, tank-wall interface, quantity, and available drawing or photos.

Which values are published and which are project-confirmed?

The product records provide initial review information. Final configuration, mounting, operating, physical dimensions, and applicable project conditions require confirmation against the selected drawing and transformer interface.

Can the position, phase, or operating arrangement be customized?

Yes. State the required position count, phase arrangement, operating orientation, tank-wall mounting, and applicable project conditions in the inquiry package.

What should an engineering RFQ include?

Include the transformer interface, marking requirements, quality-document expectations, quantity, destination, target delivery arrangement, drawings, photos, and nameplate information where available.

Request engineering support

Request transformerloadbreak support

Send the transformer-mounted loadbreak switch application and interface evidence so the review can confirm switching duty, mounting, clearances, and delivery inputs before quotation.

Include with your inquiry
Transformer application and switching duty Required voltage, current, and insulation level Position count, phase arrangement, and operating orientation Tank-wall interface, mounting, and clearances Drawings, photos, nameplate, and marking requirements Quantity, destination, and delivery basis
Send project inquiry

Request a loadbreak review

Tell us the transformer application, switching duty, position count, phase arrangement, mounting details, quantity, destination, and available project documentation.

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