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Distribution switching equipment
Distribution Switching Equipment for Lines, Substations and Feeder Protection
Compare disconnect switches, load break switches, circuit breakers, surge arresters, composite insulators and drop-out fuses by application point, electrical duty and installation requirements.
6 equipment categoriesCompare switching, interruption, surge protection, insulation support and fuse protection equipment.
Indoor and outdoor applicationsReview equipment for overhead lines, feeder points, substations, switchgear positions and transformer protection.
Project-specific ratingsConfirm voltage class, rated current, duty, mounting and accessories for the selected equipment category.
Equipment categories
Choose Distribution Switching Equipment by Duty.
Choose by primary duty, then confirm voltage class, application point, mounting method and required accessories.
Isolation duty
Disconnect Switches
Visible no-load isolation for overhead lines, substations and switchgear using outdoor or indoor disconnector types.
Visible open pointOutdoor and indoorNo-load isolation
Load switching duty
Load Break Switches
Rated load-current switching and feeder sectionalizing for indoor switchgear and outdoor distribution points.
Rated load switchingFeeder sectionalizingIndoor and outdoor
Fault interruption duty
Circuit Breakers
Fault-current interruption and feeder protection for indoor panels, substations and pole-mounted applications.
Fault interruptionFeeder protectionIndoor and outdoor
Surge protection duty
Surge Arresters
Lightning and switching overvoltage protection for distribution lines, transformers, substations and connected equipment.
Lightning and switching surgeLine and stationTransformer protection
Insulation support
Composite Insulators
Electrical insulation and mechanical support for suspension, tension, line-post, crossarm and equipment interfaces.
Electrical insulationMechanical supportLine and equipment types
Fuse protection duty
Drop Out Fuses
Overcurrent protection for transformer branches, lateral lines and overhead feeder taps with project-specific fuse links.
Overcurrent protectionTransformer branchesFuse link selection
Application fit
Application Positions Across the Distribution System.
Use the main feeder, protected branch and equipment-support layers to locate the required duty. The categories are selected by application, not as a prescribed series connection.
System role mapFeeder, branch, protection and support positions
Main switching pathProtected branchSurge path to earthInsulation and support
Fault interruptionCircuit BreakersFeeder bays, substations, pole-mounted protection points and indoor panels.
View circuit breakers Visible isolationDisconnect SwitchesNo-load isolation before maintenance at line, substation and switchgear positions.
View disconnect switches Load switchingLoad Break SwitchesRated load switching and sectionalizing at indoor or outdoor feeder points.
View load break switches Overvoltage path to earthSurge ArrestersLine terminals, transformers, substations and connected equipment.
View surge arresters Transformer and lateral branchDrop Out FusesOvercurrent protection on transformer branches, lateral lines and overhead feeder taps.
View drop out fuses Insulation and mechanical supportComposite InsulatorsConductor, crossarm and equipment support across line and substation structures.
View composite insulatorsSelection matrix
Choose the Equipment Category Before Confirming Ratings.
Start with the primary system duty, then confirm the category-specific ratings, installation details and accessory package on the relevant technical page.
Equipment category
Choose first when
Engineering role
Confirm for selection
Maintenance isolation requires a visible open point after the circuit is de-energized.
No-load isolation; does not replace load-break or fault-interruption equipment.
Voltage class, continuous current, indoor or outdoor position, mounting, mechanism and interlock.
Normal feeder operation requires rated load switching or sectionalizing.
Rated load-current switching; not the first choice for circuit-breaker fault interruption.
Voltage, current, frequency, making capacity, operating method, mounting and controller or fuse package.
The protection scheme must interrupt fault current and isolate a feeder, bay or line section.
Fault-current interruption coordinated with relays, controllers or reclosing logic.
Voltage, current, breaking current, insulation level, control voltage, protection interface and installation.
Transformers, lines or substation equipment need a controlled overvoltage path to earth.
Limits lightning and switching overvoltage; it is not a switching device.
System voltage, MCOV, nominal discharge current, housing, creepage, earth lead and accessories.
The design needs electrical insulation plus mechanical support for conductors or equipment.
Suspension, tension, line-post, crossarm or equipment support; no switching or protection duty.
Voltage class, creepage, mechanical load, end fittings, shed profile, environment and interface drawing.
A transformer branch, lateral or overhead tap needs fuse-based overcurrent protection.
Fuse interruption with visible drop-out indication and sectionalizing after operation.
Voltage, continuous current, interrupting rating, fuse-link type and rating, mounting and insulation level.
Structure and working principle
How Each Equipment Category Performs Its Primary Duty.
Select a category to follow its operating input, equipment action and electrical result. The final band identifies the structure to confirm on the selected series drawing.
Visible isolation
Disconnect Switches
After upstream equipment removes load and fault current, the operating linkage opens the blade or contact set to establish a visible isolation point.
- InputCircuit de-energized
- ActionBlade or contact opens
- ResultVisible isolating gap
Key structure
Blade or moving contact, fixed contact, insulators, operating linkage and interlock interface.
Load switching
Load Break Switches
An operating drive moves the contacts while the selected arc-control or interruption medium manages rated load-current switching.
- InputOperating command
- ActionContacts open with arc control
- ResultRated load interrupted
Key structure
Main contacts, arc-control or interruption medium, operating drive and mounting interface.
Fault interruption
Circuit Breakers
A protection or control command releases the mechanism so the contacts separate and the interrupter clears the fault current.
- InputProtection or control command
- ActionTrip and contact separation
- ResultFault current interrupted
Key structure
Trip release, operating mechanism, contacts and interruption chamber.
Overvoltage protection
Surge Arresters
The MOV column becomes conductive during a transient, diverts surge current to earth and returns to high resistance afterward.
- InputTransient overvoltage
- ActionMOV column conducts to earth
- ResultEquipment voltage limited
Key structure
MOV blocks, housing, line and earth terminals, earth lead and optional disconnector or counter.
Insulation and support
Composite Insulators
The core rod carries mechanical load while the polymer housing and sheds maintain the external insulation path.
- InputElectrical and mechanical load
- ActionCore and housing carry duty
- ResultInsulation and support maintained
Key structure
Core rod, polymer housing and sheds, end fittings and interface hardware.
Branch overcurrent protection
Drop Out Fuses
Overcurrent melts the fuse link; the arc is extinguished and the released fuse tube drops to a visible open position.
- InputOvercurrent
- ActionFuse link operates and tube releases
- ResultBranch isolated visibly
Key structure
Fuse link, fuse tube, upper and lower contacts, hinge and mounting bracket.
Rating boundary
Keep Rating Data Separate by Equipment Category and Series.
A shared system voltage does not make rating rows interchangeable. Use the selected category’s own series data, installation type and applicable standard.
Non-transfer rule
Interruption, insulation, mechanical and accessory ratings remain attached to the equipment type and series that defines them.
Indoor design≠Outdoor design
Main equipment≠Accessories
Isolation rating≠Interruption rating
Six category boundaries
Each category separates its rating basis from values that must remain within another equipment type, series or installation.
Disconnect Switches
Rating basis
Rated voltage, normal current, insulation level, short-time withstand and isolating distance for the selected indoor or outdoor series.
Do not transfer
Do not transfer load-breaking or fault-interruption data from load break switches or circuit breakers.
Final check
Operating mechanism, pole or panel arrangement, earthing function and the selected series drawing.
Load Break Switches
Rating basis
Rated voltage, normal current, frequency, load-breaking current, short-circuit making capacity and insulation level for the selected interrupter design.
Do not transfer
Do not substitute circuit-breaker fault interruption data or disconnect-switch no-load duty.
Final check
Indoor or outdoor construction, interruption medium, fuse or controller package and operation method.
Circuit Breakers
Rating basis
Rated voltage and current, short-circuit breaking and making current, short-time withstand, insulation level and operating sequence.
Do not transfer
Do not copy load-break switching values, controller data or accessory ratings from another breaker series.
Final check
Relay or controller, control voltage, CT interface, reclosing need and installation type.
Surge Arresters
Rating basis
Rated voltage, MCOV, nominal discharge current, residual voltage, energy capability, creepage distance and housing type.
Do not transfer
Do not select MCOV or residual voltage from system nominal voltage alone, or use monitor and counter ratings for the arrester body.
Final check
Grounding arrangement, altitude, pollution level, housing type and disconnector or counter need.
Composite Insulators
Rating basis
Voltage class, creepage distance, specified mechanical or cantilever load, interface dimensions and housing profile.
Do not transfer
Do not mix suspension, tension, line-post, crossarm, bushing or accessory values between product types.
Final check
End fittings, load direction, conductor or equipment interface, pollution level and outline dimensions.
Drop Out Fuses
Rating basis
Rated voltage, continuous current, rated breaking current, insulation level and fuse-link characteristic for the selected cutout.
Do not transfer
Do not use fuse-holder current alone to select the fuse-link rating or interrupting duty.
Final check
Fuse-link type, transformer or lateral protection coordination, mounting angle, bracket and environmental conditions.
Document review
Review Data and Drawings Before Model Approval.
Start with the selected equipment category and series. Confirm its rating data, installation interfaces and required project documents before model approval.
01
Rating data
Does every value belong to the selected category and series?
Match voltage class, normal current, insulation level and the duty-specific rating to one identified equipment series and applicable standard.
Approval gate
Category, series, standard and revision are identified on the same data set.
02
Outline and mounting drawings
Will the equipment fit the intended pole, panel, cabinet or structure?
Check overall dimensions, mounting holes, terminal orientation, operating mechanism interface and required electrical or mechanical clearances.
Approval gate
Request an outline or mounting drawing whenever fixed dimensions affect the installation.
03
Test and project documents
Does the document set match the project standard and inspection scope?
Confirm applicable standards, test or inspection records, packing details and any destination documentation required for approval.
Approval gate
Document titles, model references and applicable revisions agree with the selected equipment.
Use drawings for interfaces, not performance ratings.
Product photos can help identify construction. They do not replace series rating data, and an accessory drawing does not define main-equipment performance.
Engineering selection
Send Project Requirements for Equipment Selection.
Choose the equipment category first, then provide the conditions that affect ratings, construction, interfaces and document scope.
Project inputsFour review groups
01
Equipment and duty
Equipment category, application position and required duty: isolation, load switching, fault interruption, surge protection, insulation support or fuse protection.
02
Electrical basis
System voltage, frequency, rated current, short-circuit or switching duty, insulation level and the applicable utility or IEC standard.
03
Installation conditions
Indoor or outdoor use, pole, panel, cabinet or structure mounting, altitude, pollution level, ambient temperature and operating method.
04
Interfaces and supply scope
Outline or mounting drawing need, accessories, control voltage where applicable, quantity, destination country, inspection and packing requirements.
What does this Distribution Switching Equipment hub cover?
It covers outdoor disconnect switches, outdoor air break switches, fuse disconnect switches, earthing switches, bypass disconnectors and indoor disconnect switches used for line isolation, sectionalizing, grounding and maintenance switching decisions.
What is the difference between an outdoor disconnect switch and an air break switch?
Use an outdoor disconnect switch when the main requirement is visible no-load isolation. Use an outdoor air break switch when the line point also needs air break switching or sectionalizing within the selected rating and operating method.
When should a buyer choose a fuse disconnect switch?
Choose a fuse disconnect switch when fuse protection and visible isolation belong at the same transformer branch, feeder tap or outdoor line protection point. Send fuse carrier or fuse link requirements with the voltage and current class.
When are earthing switches and bypass disconnectors reviewed?
Review earthing switches when the operating sequence needs a dedicated grounding point. Review bypass disconnectors when a recloser, breaker or switching device needs a service bypass path for maintenance.
What information is needed before XIYA POWER can quote a disconnect switch?
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.
Should individual models be selected on the hub page?
No. The hub should narrow the product family first. Model selection comes after voltage, duty, installation drawings and document requirements are known.