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Disconnect switches
Disconnect Switches for Line Isolation, Switching and Bypass
Compare outdoor disconnect switches, air break switches, fuse disconnect switches, earthing switches, bypass disconnectors and indoor switch disconnectors by line position, duty, rating input and mounting package.
Disconnect switch types
Disconnect Switch Types by Duty
Start with the switching task: visible isolation, air break switching, fuse protection, grounding, bypass duty or indoor cabinet isolation.
Type 01
Outdoor Disconnect Switches
Visible no-load isolation for overhead lines, substations and utility switching points before maintenance work.
10-220 kV rangeHorizontal rotaryOutdoor isolation
Type 02
Outdoor Air Break Switches
Outdoor air break switching for medium voltage overhead distribution lines and sectionalizing points.
10-36 kV referenceArc optionPole mounted
Type 03
Fuse Disconnect Switches
Fuse-linked disconnect switching for protection points where isolation and fuse carrier selection belong together.
Fuse typeThree phase frameLine protection
Type 04
Earthing Switches
Grounding and maintenance isolation equipment for switchgear, substations and outdoor switching assemblies.
Grounding dutyMaintenance safetyIndoor or outdoor
Type 05
Bypass Disconnectors
Bypass switching assemblies for recloser, breaker or line equipment maintenance arrangements.
Bypass dutyThree phaseMaintenance bypass
Type 06
Indoor Disconnect Switches
Indoor isolators, switch disconnectors and three-position switches for switchgear cabinets and compact distribution assemblies.
Indoor isolatorSwitch disconnectorCabinet fit
Selection note: choose the switch type by duty first; confirm voltage class, rated current, operating method and mounting interface before model approval.
Application fit
Line Isolation and Switching Map
Locate the duty point first: visible isolation, load sectionalizing, transformer branch protection, maintenance bypass, grounding or cabinet isolation.
Visible isolation
Outdoor disconnect switches for line isolation
For feeder, substation or line positions where the main requirement is visible open isolation before maintenance.
Load sectionalizing
Outdoor air break switches for overhead lines
For overhead distribution line points that need outdoor switching, sectionalizing or simple load-break review.
Transformer branch
Fuse disconnect switches for branch protection
For transformer branches and feeder taps where fuse protection and visible isolation are selected together.
Maintenance isolation
Bypass, earthing and indoor disconnects
For bypass circuits, grounding points and cabinet isolation positions that depend on the maintenance sequence.
Duty and rating comparison
Disconnect Switch Selection Matrix
Product type
Best fit
Duty boundary
RFQ signals
Outdoor Disconnect Switches
Visible no-load isolation10-220 kV line and substation points
Isolation after load removedVisible open distance, mechanical position
Voltage / current / open distanceInsulator, mechanism, phase layout, drawing
Outdoor Air Break Switches
Overhead line switching10-36 kV sectionalizing points
Air-break or arc-chute dutyDepends on switch structure and operation method
Arc chute / pole layoutRated current, operating rod, fuse option, photos
Fuse Disconnect Switches
Fuse protection plus isolationTransformer branches and feeder taps
Fuse carrier selected with switchProtection point and visible isolation together
Fuse link / carrier typeVoltage, current, phase count, mounting style
Earthing Switches
Maintenance groundingSwitchgear, substation and outdoor assemblies
Interlock sequence requiredGrounding operation after isolation is confirmed
Short-time withstand / interlockInstallation location, mounting, drawings
Bypass Disconnectors
Service bypass circuitAround recloser, breaker or line device
Bypass during maintenanceOperation sequence and connection layout drive selection
Bypassed equipment / sequenceVoltage, current, phase layout, connection drawing
Indoor Disconnect Switches
Cabinet isolationIndoor isolator, switch disconnector, 3-position switch
Panel interlock and fitCabinet drawing decides function and operation side
Panel drawing / operation sideVoltage, current, grounding function, quantity
Operating mechanism and mounting
Operating Mechanism and Mounting
For disconnect switch selection, type selection is only the first layer. The quote still needs mechanism, mounting, interlock and drawing inputs before model-level confirmation.
Switching Package Architecture
Start with the selected switch type, then lock the operating and installation package used for drawings, packing and inspection.
Mechanical linkageReview input
PrimarySelected switch body
Voltage, current, duty and phase structure.
PackageOperating method
Manual handle, motor drive, rod, shaft, linkage or cabinet mechanism.
MountingSite interface
Pole, crossarm, steel frame, cabinet or substation structure.
SafetyInterlock and earthing
Confirm grounding, bypass and operation sequence limits.
DrawingConnection layout
Review terminals, spacing, operation side and installation height.
DocumentsInspection files
Rating pages, instruction, packing and routine test review.
Switch bodyConfirm electrical class and switch type first.
Mounting packageReview structure, connection and bypass circuit.
Cabinet fitUse panel drawings where indoor operation is involved.
01
Switch body
Confirm voltage class, rated current, phase count, insulation material and switch structure.
02
Operating mechanism
State manual, motorized, handle, rod, shaft or linkage requirement according to site operation.
03
Mounting hardware
Provide pole, crossarm, steel structure, cabinet or substation drawing details.
04
Interlock and grounding
Confirm earthing function, bypass circuit and operation sequence before final layout.
05
Document package
Confirm rating pages, drawings, instruction files, packing reference or inspection records.
Technical documents and test evidence
Rating Tables and Drawings
Use outdoor disconnector photos, rating pages, an RH-B instruction book, bypass switch references, indoor switch data and an outdoor weatherproof switch manual to check structure, mounting and document scope before model-level approval, and check certificates, test reports and RFQ forms before sending the inquiry.
Photos
Outdoor isolator and bypass switch images
Sample room and white-background product photos show switch structures for the first comparison layer.
Manual
RH-B and outdoor switch instruction files
Instruction material supports air break and outdoor weatherproof switch document review.
Rating data
Indoor and outdoor switch rating pages
Rating pages support indoor isolator, earthing switch and fuse disconnect type positioning.
RFQ
Drawing-based confirmation
Final quotation should use project voltage, duty, mounting photos, drawings, quantity and destination standard.
Rating table reference
Use rating pages for voltage, current, insulation and product structure checks before series pages are published, then download disconnect switch catalog PDFs from the document library.
Operation document review
Use instruction files to separate switch body, operating handle, mounting and safety notes.
Mounting and terminal review
Use pole, structure, cabinet or connection drawings before confirming mounting hardware.
Packing and inspection documents
Use quantity, destination and inspection needs to confirm packing and document scope.
Selection sequenceChoose the duty before the model code
The sequence separates switching and isolation inquiries into the correct equipment type before model-level quotation.
01Type first
Outdoor disconnect, air break, fuse disconnect, earthing, bypass and indoor switch disconnector decisions stay separate.
02Line position
The topology section explains where each switch type sits in the switching chain.
03Document fit
Photos, rating pages and instruction files support the type comparison.
04RFQ ready
Use voltage, duty, drawings, quantity and destination standard before final price review.
Disconnect Switch RFQ Data
Useful RFQ details include voltage, rated current, isolation or switching duty, fuse or grounding function, operating mechanism, mounting photos, drawings, quantity, destination country and utility standard.
What disconnect switch data is needed for RFQ?
Send voltage class, rated current, line position, isolation or switching duty, operating mechanism, mounting photos or drawings, quantity, destination country and any utility standard requirement.
Outdoor disconnect switch or air break switch: which duty applies?
Use an outdoor disconnect switch for visible no-load isolation after load is removed. Use an outdoor air break switch when the overhead line point also needs air-break switching or sectionalizing within the selected rating and operating method.
When is a fuse disconnect switch required?
Use a fuse disconnect switch when fuse protection and visible isolation belong at the same transformer branch, feeder tap or outdoor line protection point. Include fuse carrier or fuse link requirements with the voltage and current class.
When are earthing switches or bypass disconnectors selected?
Select an earthing switch when the operating sequence needs a dedicated grounding point. Select a bypass disconnector when a recloser, breaker or switching device needs a service bypass circuit for maintenance.
What drawings are needed for disconnect switch selection?
Provide pole, crossarm, steel frame, cabinet or substation drawings when mounting height, terminal spacing, operation side, interlock position or bypass connection layout affects fit.
Should the model be selected before voltage and duty are known?
No. Choose the product type first, then confirm voltage, rated current, duty, operating mechanism, mounting interface and document requirements before model approval.