Switch disconnector mounting orientation and clearance must come from the exact manufacturer's installation instructions and the approved panel design. A product that fits inside a cabinet is not automatically approved for every mounting direction or surrounding space. Confirm the complete device code, permitted orientation, mounting arrangement, terminal layout and required installation envelope before freezing the drawing. Keep operating access, conductor support and enclosure conditions in the same review. Where the product page does not declare a distance or an orientation, request the approved drawing rather than inventing a universal gap or rotating the device to solve a space problem.
Define the device envelope before choosing its location
The device envelope is more than the width and height visible in a front-view illustration. The assembly builder needs the complete mounting drawing, fixing arrangement and the space required by the selected operating and connection arrangement. Ask which drawing applies to the exact model and revision. A drawing for another frame in the same family may have a different terminal layout or mounting pattern. Keep the supplier's document identifier alongside the part code in the panel's component schedule.
Distinguish the product's physical outline from the space needed to install and use it as approved. The first can help with an early cabinet concept; the second governs the final arrangement. Do not describe a preliminary footprint as the permitted installation envelope. Identify missing views, unclear units or an unconfirmed operating assembly before ordering the enclosure. This prevents a convenient early sketch from becoming a manufacturing instruction without the supporting evidence that the assembly builder actually needs.
What the HGL family page can support
O SUTON HGL/ETGL load disconnector page identifies the product family, available pole configurations and normal operating and installation conditions. It gives a useful basis for a model-specific drawing request. It does not justify treating every HGL variant as interchangeable or assuming that every spatial arrangement is approved. Obtain the selected variant's installation document and ask the supplier to identify any restrictions that affect the intended cabinet layout.
The page states normal conditions including no exposure to rain or snow and an installation altitude not exceeding 2000 metres. It also says models rated 1000 A and above are suitable for electrical isolation only. These restrictions remain relevant when changing the layout. A different mounting orientation cannot create load-breaking capability or remove environmental limitations. The reference-based photographs here show the complete exterior product family; they do not demonstrate approved mounting, a verified electrical spacing or an installed cabinet ready for operation.
Confirm the permitted mounting orientation explicitly
State the intended orientation in the enquiry with an annotated panel drawing. Ask the manufacturer to confirm whether that arrangement is permitted for the exact device and operating assembly. A symmetrical-looking case is insufficient evidence. An illustration of one product position does not establish permission for every other position. If several orientations are under consideration, have each identified clearly in the response so the assembly builder does not have to interpret a general statement such as suitable for cabinet mounting.
If the preferred orientation is outside the supplied instructions, request a written engineering response before changing the drawing. Do not rely on a distributor photograph of a different installation. The supplier may need the full model designation, load duty, enclosure arrangement and site conditions before it can answer. Keep a proposed orientation marked as unconfirmed until that answer arrives. If it cannot be approved, revise the layout or choose a documented alternative through the responsible design process instead of forcing the original concept to fit.
Separate electrical spacing from service access
A cabinet needs several different kinds of space. Electrical insulation requirements, the manufacturer's device envelope, conductor connection space and room for approved operation or maintenance are related but distinct. A gap that allows a tool to reach a fixing does not prove an electrical clearance. Similarly, an electrical spacing requirement does not establish that a handle is conveniently accessible. Give each requirement a source and a purpose, then have the assembly builder reconcile them on the final drawing.
O busbar clearance and creepage guide discusses the insulation distinction at assembly level. Do not copy its general discussion into a universal HGL mounting distance. The actual design depends on the applicable requirements, conditions and manufacturer's instructions. Where a barrier or cover is proposed, the responsible designer must assess the resulting arrangement. A drawing should show the approved solution and its revision rather than merely noting that adequate clearance will be provided later during assembly.
Build a drawing-review schedule with named evidence
| Item de desenho | Evidence source | Pergunta de revisão |
|---|---|---|
| Identidade do dispositivo | Complete code and current drawing | Does this drawing cover the offered model? |
| Orientation | Manufacturer instructions or confirmation | Is the proposed direction permitted? |
| Mounting envelope | Approved dimensional document | Does the final layout preserve it? |
| Dirigentes | Connection and support arrangement | Are routing and interfaces approved? |
| Operating assembly | Exact handle kit and enclosure drawing | Do mechanism and cabinet match? |
| Ambiente | Service conditions and assembly review | Are departures resolved? |
| Revision | Final approved drawing set | Does production use the accepted layout? |
Use the exact manufacturer documents and project requirements to complete the schedule. It is a review tool, not a set of installation dimensions. The IEC 60947-3 publication page identifies the relevant component-standard scope, but does not provide a mounting approval for a particular cabinet. The assembly builder must establish the applicable assembly requirements and verification route. Keep those responsibilities visible so a component drawing is neither ignored nor mistakenly treated as proof of the entire panel design.
Review conductors and mechanical support together
Show conductor entry, routing and the proposed connection arrangement in the panel drawing. Ask for the permitted terminal and conductor details for the selected model. The space needed depends on the actual conductor system and its approved installation conditions. Do not infer bend space, lug compatibility or support requirements from a bare product photograph. The conductor manufacturer and assembly design may provide information that the switch outline alone cannot establish. Coordinate these inputs before releasing the panel for production.
Keep mechanical support separate from the assumption that a terminal can carry whatever force a routed conductor imposes. The responsible designer must define the approved arrangement and any supports needed for that installation. Avoid pulling a conductor into position by using the switch terminal as a convenient anchor. For the connection documentation question, the MCB terminal torque and conductor checklist illustrates why connection requirements must remain device-specific; it does not supply HGL terminal values. For the HGL terminals, request the exact instructions separately; an operating-handle torque figure is not a substitute for a connection requirement.
Check the operating assembly against the final enclosure
The cabinet drawing should identify whether operation is direct or through a door-coupled assembly. Where a door handle is used, request the corresponding approved kit information and relevant dimensions. The switch location and door arrangement must be reviewed together, including the specified mechanism and any required interlock relationship. Do not assume a handle from another frame will solve a geometric conflict. Nor should a shaft be modified merely because the initial enclosure choice leaves too little space for the approved assembly.
O door-coupled rotary handle interlock guide addresses that related mechanism question. This article focuses on the switch body's approved mounting arrangement and surrounding envelope. Keep both reviews connected without treating either as a complete acceptance of the other. Changes to the enclosure depth, mounting plate or door can affect the operating assembly even when the device code stays the same. Return those changes to the responsible reviewer and update the drawing revision before manufacturing continues.
Keep thermal and environmental assumptions visible
A compact arrangement can alter the conditions around a device. The assembly builder must assess the actual installation, loading and environment under its applicable design process. Do not claim that a particular open space guarantees cooling unless the relevant instructions and evidence support it. Catalogue normal conditions are useful inputs, but they do not describe every cabinet interior. State the expected service conditions, nearby equipment and any departure from the manufacturer's normal declaration when requesting layout confirmation.
For the wider functional decision, consult the isolator switch guide for panel builders. A suitable isolation function, permitted orientation and acceptable assembly design all need attention. Choosing a larger enclosure may resolve a spatial conflict, but it does not automatically resolve environmental suitability. Likewise, an enclosure rating alone does not confirm every internal condition. Keep each open issue assigned to the responsible organization and require the evidence needed to close it before acceptance.
Control revisions through manufacture and handover
Agree which drawings the manufacturer and assembly builder must approve before production. Record the device code, installation drawing, enclosure layout and operating kit revision. If a substitution changes the frame, terminals or mounting pattern, repeat the affected review rather than accepting it solely on current rating. A technically suitable switch can still require a different panel arrangement. Catching that change in the drawing review is more manageable than discovering it after the mounting plate has been drilled or the busbars fabricated.
HSE electrical equipment guidance provides context for suitable equipment and competent maintenance. Plan any physical checks through the site's authorized process and the actual manufacturer instructions; this guide does not provide a live-equipment installation procedure. At handover, retain the final approved drawings and identify any accepted limitations. For a SUTON quotation, send the complete model, proposed orientation and annotated cabinet layout, then request the applicable mounting envelope and confirmation of the offered arrangement. That creates a reviewable purchase decision instead of an assumption about available space.
Perguntas frequentes
Can a switch disconnector be mounted horizontally if it fits?
Fit alone does not establish approval. Ask the manufacturer whether the exact device and operating arrangement permit the proposed orientation. Provide the annotated cabinet drawing and relevant service conditions. Keep the layout unconfirmed until the applicable installation instructions or written response cover it, and revise the design if approval is unavailable.
Is there one clearance distance for all HGL models?
Do not assume a universal distance. Obtain the exact model's installation drawing and the assembly designer's applicable requirements. Device envelope, electrical spacing, conductor space and operating access answer different questions. Preserve their sources separately and have the assembly builder reconcile them in the final documented layout.
What should happen after a cabinet layout changes?
Identify the affected device, operating assembly, conductor arrangement and document revisions. Repeat the relevant review with the manufacturer and assembly builder before releasing the change. Retain the approved result in the handover records. An earlier approval should not be treated as covering a new orientation or spatial arrangement automatically.
Vídeo educativo
SELECT Safe Isolation Animation 2024 by SELECT. This electrical trade association animation explains the safe-isolation context for the document review. Its work method must not be applied without the site-specific authorized process; it does not approve a SUTON lock interface or terminal connection.