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Pole-mounted SF6 LBS
Pole-Mounted SF6 Load Break Switch (IACT)
The main product is an outdoor SF6 insulated load break switch for overhead feeder load switching, sectionalizing, loop points and transformer circuit control. Add the LBS controller only when the project needs sensing, local operation, event records or SCADA communication.
Specification
SF6 Load Break Switch Ratings
LRFW rating data defines the visible 12 / 24 / 36 kV switch-body table. Confirm the selected series before nameplate or drawing release because PGS/RPS documents describe a separate comparison series with different current, short-time, IP and standard references.
LRFW 12 kV rating data
12 kV feeder load switching class.
For 12 kV medium-voltage feeders requiring load current switching, line sectionalizing or transformer circuit control with a controller-ready pole switch body.
Parameter
12 kV data
Rated voltage
12 kV
Rated frequency
50 / 60 Hz
Rated current
400 / 630 A
Rated short-circuit withstand / breaking current
12.5 kA
Rated short-circuit making current
31.5 kA peak
Rated peak withstand current
31.5 kA
Rated short-circuit time
1 second
Power operating time
<2 seconds close / open
Power-frequency withstand voltage
28 / 32 kV for 1 minute
Lightning impulse withstand voltage
76 / 85 kV peak
LRFW 24 kV rating data
24 kV distribution switching class.
This class fits feeder sectionalizing, loop switching and transformer circuit control projects where the application voltage level is 24 kV.
Parameter
24 kV data
Rated voltage
24 kV
Rated frequency
50 / 60 Hz
Rated current
400 / 630 A
Rated short-circuit withstand / breaking current
12.5 kA
Rated short-circuit making current
31.5 kA peak
Rated peak withstand current
31.5 kA
Rated short-circuit time
1 second
Power operating time
<2 seconds close / open
Power-frequency withstand voltage
50 / 60 kV for 1 minute
Lightning impulse withstand voltage
125 / 145 kV peak
LRFW 36 kV rating data
36 kV upper distribution class.
For feeder voltage and insulation levels requiring the 36 kV application group. Confirm installation space and terminal dimensions before final drawing.
Parameter
36 kV data
Rated voltage
36 kV
Rated frequency
50 / 60 Hz
Rated current
400 / 630 A
Rated short-circuit withstand / breaking current
12.5 kA
Rated short-circuit making current
31.5 kA peak
Rated peak withstand current
31.5 kA
Rated short-circuit time
1 second
Power operating time
<2 seconds close / open
Power-frequency withstand voltage
70 / 80 kV for 1 minute
Lightning impulse withstand voltage
170 / 190 kV peak
Shared values
These shared values belong to the LRFW table, not a merged PGS/RPS table: 5000 mechanical operations, 400 rated full-load operations, IP65 protection level, SF6 gas as both arc-extinction and insulation medium, and SF6 gas yearly leak rate <=0.5%. Service conditions include altitude <=3000 m, -40 deg C to +50 deg C air temperature, maximum wind speed <=34 m/s and pollution grade III / IV. The separate RPS/PGS comparison series lists IEC 62271-103, 400 / 630 / 800 / 1250 A, 20 kA / 4 s, IP67 and suspended or horizontal mounting, so do not merge those values into this LRFW table.
Structure
Switch Body and Controller Package
The buyer selects the outdoor SF6 LBS body first. Controller cabinet, motor wiring and communication interface are added after body rating, mounting method and sensing plan are fixed.
What the switch body includes.
The LRFW structure sheet identifies the outdoor switch body as the high-voltage equipment: lift handle, carrying handle, rubber bushing, manual operation handle, contact position indicator, support frame, grounding device, locking device, gas pressure relief, electric mechanism, SF6 pressure gauge and filling valve.
Switch bodySF6 insulated tank, bushings, line terminals, operating mechanism, pressure gauge and open/close indication.
Mounting relationshipSingle-pole drawings show anchor ears, assembly frame, lift handle, hole, nameplate and controller box position.
Optional controllerLBS cabinet for phase and ground current sensing, three-phase voltage sensing, alarms, local operation and SCADA connection.
RFQ boundaryQuote the switch body first. Add controller, CT/VT sensing, motor wiring and communication only when the project needs them.
Controls
LBS Controller Functions
The LBS controller supports sensing, motorized operation, alarms, records and communication after the switch body is selected. It does not make this device an automatic vacuum circuit recloser for fault-current interruption.
Current and voltage sensing
The controller provides phase and ground current sensing, three-phase voltage sensing, and can compute power, energy, power factor and power flow direction.
Front panel and software setup
Settings can be programmed from the front panel, PC configuration software or web browser through temporary Ethernet or USB access.
SCADA and device interface
The manual references RS-232, Ethernet and RS-485 ports for SCADA or interconnection to other devices.
Event and analysis tools
The controller tools include event recording, data profiler, application one-line diagram, oscillography and time-current curve functions.
Switch body plus controller package
Package scope: switch body, controller cabinet, cable accessories and motorized operation.
Controller cabinet body
Select the cabinet after the switch rating, mounting method, sensor requirement, motor wiring and communication interface are fixed.
Applications
Feeder Switching Topology
The topology separates the main feeder load-current path from optional sensing, command and communication paths.
Principle topology at the SF6 load switch pointPower path + optional controller
Power path: feeder source to SF6 LBS body, then to feeder sectionalizing, loop/tie or transformer circuit endpoints.
Sensing path: phase current, source-side voltage, load-side voltage and switch position feed the controller.
Optional control path: open/close command, front panel, PC setup, Ethernet, USB, RS-232 or RS-485 to SCADA / DA.
Endpoint
Path type
RFQ implication
Feeder source to downstream endpoint
Load current path
Confirm voltage class, rated current, short-time requirement and line terminal or cable outlet style.
Current / voltage / position signals
Sensing path
Confirm CT ratio, source-side and load-side voltage sensing, open/close status and alarm requirement.
Controller to operator or SCADA
Command and communication path
Confirm local front panel, PC tool, Ethernet, USB, RS-232, RS-485 or SCADA / DA interface.
Feeder load switching
The SF6 load break switch body opens and closes load current on overhead distribution feeders, branch circuits, loop points or transformer circuits.
- Primary switch body
- 12 / 24 / 36 kV class
- 400 / 630 A class
Optional intelligent operation
Add the LBS controller when the site needs sensing, event records, communication and local or remote operation.
- Controller cabinet option
- Current / voltage sensing
- SCADA or local interface
RFQ boundary
The RFQ should state whether the buyer needs only the LRFW switch body or the switch body plus intelligent controller and wiring review.
- Switch body scope
- Controller option
- Drawing review
Engineering drawings
Mounting and Wiring Review
Use installation, dimensional and wiring drawings to confirm pole mounting, terminal clearance and controller connections before production approval.
Single-pole installation reference
Confirm anchor ears, assembly frame, lift handle, hole, nameplate position and controller box location from the installation drawing.
Mounting holes and terminal size
Check outline dimensions, installation hole distance and terminal connection size before production drawings are approved.
Controller wiring review
When the intelligent controller is selected, review command, status, power, CT/VT or voltage sensor and communication paths from the wiring drawing.
Single-pole installation drawing
Check anchor ears, assembly frame, lift handle, nameplate and controller box position before the final drawing is approved.
Dimensional drawing
Check outline dimensions, installation hole distance and terminal connection size against the selected voltage class.
Factory documents
LRFW and Controller Files
LRFW sheets, RPS/PGS comparison material, LBS controller manuals and wiring drawings support different decisions. The page keeps rating data, controller functions and engineering review separate.
Visible rating tableLRFW structure and technical-characteristics sheets.
These files supply the visible 12 / 24 / 36 kV, 400 / 630 A table, service conditions, single-pole installation data and structure list.
Comparison seriesRPS / PGS pole-mounted load break switch catalog.
This material lists IEC 62271-103, 6-40.5 kV, 400 / 630 / 800 / 1250 A, 20 kA / 4 s, IP67 and suspended or horizontal mounting. Treat it as a separate series check.
Controller and wiringLBS controller guide and wiring drawings.
These files support phase and ground current sensing, voltage sensing, SCADA ports, AC input, control circuit, power circuit and terminal definitions.
Check the IEC reference by selected series
The RPS/PGS catalog references IEC 62271-103. One supplied LRFW sheet references IEC 62271-200. Confirm the selected model and buyer standard before making a compliance statement.
12 named structure points
The sheet identifies lift handle, carrying handle, rubber bushing, manual operation handle, position indicator, support frame, grounding device, locking device, pressure relief device, electric mechanism, pressure gauge and filling valve.
Single-pole mounting drawing
The installation drawing shows upside and downside anchor ears, assembly frame, controller box position, lift handle, hole and nameplate position.
Outdoor service conditions
Confirm altitude <=3000 m, -40 deg C to +50 deg C, humidity, wind speed <=34 m/s, icing <10 mm, snow <35 mm and pollution grade III / IV.
SF6 pressure and leakage checks
The LRFW table lists SF6 gas as arc-extinction and insulation medium, with SF6 gas yearly leak rate <=0.5%. RPS/PGS comparison data lists a separate <=1% yearly gas leakage reference.
Before final quotation
Request the selected series, final nameplate, dimensional drawing, single-pole installation confirmation, wiring diagram, controller settings basis and inspection record.
FAQ
SF6 Load Break Switch FAQ
What is a pole-mounted SF6 load break switch?
It is an outdoor SF6 insulated load break switch installed on overhead distribution feeders for load current switching, line sectionalizing, loop points and transformer circuit control. The LBS controller is an optional automation package for sensing, alarms, local operation and SCADA communication.
Is it the same as an automatic vacuum circuit recloser?
No. The SF6 LBS is for load current switching and sectionalizing. If the project needs fault-current interruption with automatic reclosing protection, compare the Automatic Vacuum Circuit Recloser.
Which ratings should be confirmed first?
Confirm the selected switch series first, then voltage class, rated current, short-time withstand or breaking requirement, terminal or cable outlet style, operating method, service environment and mounting condition.
Which standards are shown in the supplier documents?
The RPS/PGS catalog references IEC 62271-103. One supplied LRFW sheet references IEC 62271-200. Treat these as supplier-document notes until the selected model and purchaser standard are confirmed.
What controller interfaces are available?
The controller manual references front-panel operation, PC software and web programming, Ethernet and USB access, plus RS-232, Ethernet and RS-485 ports for SCADA or device interconnection.
What should be sent for quotation?
Send system voltage, rated current, feeder role, short-circuit level, terminal or cable outlet style, mounting method, manual or electric operation, CT/VT sensing, controller or SCADA needs, destination standard, quantity and site drawings or photos.
SF6 Load Break Switch RFQ Data
USD 1,200-9,500 reference range depends on voltage class, rated current, controller cabinet, sensing package, motor wiring, mounting details and quantity. Confirm this is the right adjacent Smart Grid equipment type before sending an RFQ request, then send RFQ details including selected series, feeder role, loop or sectionalizing requirement, terminal or cable outlet style, mounting drawing, service environment, CT/VT sensing, SCADA interface and destination standard. To compare adjacent equipment, return to the Smart Grid equipment hub, review User Boundary Switch or compare the Automatic Vacuum Circuit Recloser. For company background, see About XIYA POWER.