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Bypass disconnector product types
Bypass Disconnectors for Recloser and Line Device Maintenance
Bypass disconnectors create a controlled alternate circuit around a recloser, breaker or line switching device during maintenance. Compare LW15, LW1 and project bypass configurations by voltage class, BIL, momentary duty, operation side and mounting layout.
Product types
Bypass Disconnector Types
Start with the equipment being bypassed. LW15 covers distribution-class disconnect or bypass rows, LW1 covers compact three-pull recloser bypass duty, and project photos need order-specific ratings.
BD 0115/24 kV
LW15 Distribution-Class Bypass Disconnector
Distribution-class switch configuration for vertical or inverted cross-arm arrangements where bypass or disconnect duty is reviewed from the LW15 rating table.
BD 0215.5-38 kV
LW1 Three-Pull Recloser Bypass Switch
Compact three-pull bypass switch configuration for recloser or line device maintenance where the bypass blade spans the top terminals.
BD 03Photo-only input
Project Bypass Disconnect Assembly
Project photo input for bypass disconnect assemblies where the layout, device being bypassed and operating sequence drive selection.
Reference basisBypass configuration selected by device and sequence.
Use product photos, rating rows and project drawings for selection. Appearance references do not define voltage, BIL or momentary current.
Application fit
Bypass Switching Sequence
Select the bypass disconnector after the protected device, normal position, bypass position and isolation sequence are clear.
Bypass role
The bypass circuit is selected around a device, not as a generic disconnect.
Use this configuration when a recloser, breaker or line switch needs an alternate service circuit. If the duty is only visible no-load isolation, compare outdoor disconnect switches instead.
Normal circuit closed through the main device
Confirm the equipment being bypassed and the normal operating position before choosing hardware.
Bypass circuit closed before the device is isolated
Review bypass blade direction, disconnect position and the approved utility sequence together.
Drawing decides the final package
Mounting channel, cross-arm position, operation side and clearances must be checked from the site drawing.
Selection matrix
Bypass Disconnector Selection Matrix
Use the matrix to separate LW15, LW1 and project assembly configurations before checking voltage, current, BIL and momentary duty.
Product type
Application point
Bypass interface
Project data
LW15 bypass configuration15/24 kV rows
Distribution switching/Cross-arm mounting/Disconnect or bypass duty
V-style or LS base/Truss blade/400 / 630 A rows
Voltage class/Rated current/Impulse row/PF withstand/Mounting base
LW1 recloser bypass15.5-38 kV rows
Recloser bypass/Maintenance sequence/Three-pull operation
Bypass blade/Hookstick disconnects/Galvanized channel
Bypassed device/BIL row/40 kA momentary/Operation side/Sequence drawing
Project assemblyOrder file required
Site layout review/Bypass circuit/Project-specific fit
Mounting channel/Operating ring/Hinge and jaw contacts
Voltage/Current/BIL/Momentary duty/Mounting drawing
Structure
Blade Operation and Mounting
With the bypass sequence selected, check blade arrangement, hook-stick operation, insulator class and mounting channel against the drawing.
Structure inputs
Use these four checks before the model is released.
Bypass bladeBlade across top terminals, hinge contact, jaw contact and open position.
Hook-stick interfaceHookstick-operated disconnects, operating rings and linkage hardware.
Insulators and contactsInsulator class, hinge contact, jaw contact and terminal spacing.
Mounting channelGalvanized base channel, cross-arm mount, backstrap or direct bolting.
Variant handling
Voltage and Current Boundaries
Keep LW15 table values, LW1 bypass values and project photo-only data in separate engineering rows.
Use 15 / 24 kV and 400 / 630 A only from the LW15 table.
The 12.5 kA 4 s and 31.5 kA shock rows belong to LW15 first-stage comparison.
Use BIL and momentary rows for recloser bypass duty.
LW1 rows list 15.5, 27 and 38 kV classes, BIL up to 150 kV and 40 kA momentary current.
Review files
Bypass Disconnector Documents
Separate clean product identity, rating rows, bypass topology and project drawings. LW1 now includes a cleaned Drawing tab from the supplied project PDF. For broader document review, download bypass disconnector catalog PDFs.
Use clean white-background product photos
LW15, LW1 and project assembly photos identify structure without exposing technical scans.
Match each value to its rating table
Voltage, current, BIL and momentary values should not be copied across LW15, LW1 and photo-only assemblies.
Keep the Drawing tab conditional
LW1 uses the cleaned project PDF drawing. LW15 and project photo-only assemblies stay SPEC-only until clean outline drawings are supplied.
Keep bypass sequence with device data
Bypassed equipment, normal position, bypass position, operation side and mounting drawing should be checked together.
Engineering selection
Bypass Disconnector RFQ Data
Lock the bypassed equipment first, then check voltage, BIL, momentary duty and mounting sequence against the site drawing. For procurement review, check certificates, test reports and RFQ forms before release.
Recloser, breaker or line device position decides the bypass configuration.
Operation sequence must show when each disconnect and bypass blade is open or closed.
Keep LW15, LW1 and project-only values in separate rows.
Mounting channel, cross-arm, backstrap, direct bolting and operation side drive the final package.
Selection typeLW15 / LW1 / project bypass assembly.
Bypassed deviceRecloser, breaker or line switching device.
System voltage15, 24, 27, 38 kV or project value.
Rated current400 A, 630 A or utility requirement.
BIL / withstandImpulse, PF withstand and momentary current.
SequenceNormal, bypass and isolation positions.
Operation sideRight-hand, left-hand, hook-stick or project practice.
Mounting layoutCross-arm, channel, backstrap, terminal spacing and quantity.
FAQ
Bypass Disconnector FAQ
What bypass disconnector data is needed for RFQ?
Send the device being bypassed, system voltage, rated current, BIL, momentary current, normal and bypass sequence, operation side, mounting drawing, quantity and destination standard.
Where is a bypass disconnector used?
A bypass disconnector provides an alternate circuit around a recloser, breaker or line device so the equipment can be serviced according to an approved switching sequence.
How should engineers choose between LW15 and LW1 configurations?
Use LW15 rows when the disconnect or bypass duty follows the 15 kV or 24 kV distribution-class table. Use LW1 when the project is a compact three-pull recloser bypass arrangement with 15.5 kV to 38 kV design classes.
Can project photos define the rating?
No. Project photos show layout, mounting channel and operating hardware only. Voltage, current, BIL and momentary duty must come from the order file or rating row.
What documents are needed for bypass rating confirmation?
Use product photos, rating rows, project drawings and the approved normal-to-bypass switching sequence. Appearance references do not define voltage, BIL or momentary current.
Request Bypass Disconnector Quote
Send the bypassed device, voltage, current, BIL, momentary current, normal and bypass sequence, operation side, mounting drawing, quantity and destination standard. XIYA will return the suitable bypass configuration, drawing check and quotation scope.