{"id":2636,"date":"2026-10-18T03:28:32","date_gmt":"2026-10-18T03:28:32","guid":{"rendered":"http:\/\/ritoks.com\/"},"modified":"2026-10-22T13:28:16","modified_gmt":"2026-10-22T13:28:16","slug":"switchgear-contact-temperature-sensor-placement","status":"publish","type":"post","link":"https:\/\/ritoks.com\/fr\/switchgear-contact-temperature-sensor-placement\/","title":{"rendered":"Switchgear Contact Temperature Monitoring: Planning Sensor Locations"},"content":{"rendered":"

Quick answer<\/h2>\n

Plan switchgear temperature sensor locations around a named measurement task, not around spare space inside the cabinet. Identify the connection, the approved mounting surface, the measured quantity and the equipment manufacturer’s installation restrictions. A sensor attached near a joint does not automatically measure the hidden contact interface or the surrounding air.<\/p>\n

The practical deliverable is a location schedule that engineering, procurement and maintenance can read in the same way. It should connect each sensor identity to an equipment drawing, a physical position and a receiver channel. Keep proposed locations separate from locations approved for installation. This guide develops that schedule; it does not provide a live-work procedure, an alarm threshold or a universal mounting design.<\/p>\n

Define what each measurement is supposed to tell you<\/h2>\n

Start with a question such as: \u201cWhich accessible surface represents the condition we want to monitor at this connection?\u201d That question is more useful than \u201cWhere can we attach another sensor?\u201d The answer determines whether the proposal belongs to contact-condition monitoring, cabinet environmental monitoring or a different measurement system.<\/p>\n

Schneider Electric’s SureSeT user guide describes separate conductor-joint and environmental monitoring functions. Its application documentation also distinguishes conductor temperature inputs from ambient and current inputs. These are examples within a documented Schneider system, not specifications or installation permissions for another sensor family (Schneider Electric, n.d.; Schneider Electric, 2023a).<\/p>\n

Give each proposed point a short purpose statement. \u201cSurface temperature adjacent to the outgoing connection\u201d is more precise than \u201cbreaker temperature.\u201d It identifies the observation without claiming that one reading covers the entire breaker. Similarly, \u201cair temperature in the selected compartment\u201d should not be relabelled as \u201cbusbar temperature\u201d in the monitoring screen.<\/p>\n

Record exclusions alongside the purpose. A point may be intended to observe a cable termination but not the internal moving contact. An environmental point may provide useful context without being a substitute for a contact measurement. Explicit exclusions make later trend reviews less likely to turn a limited observation into an unsupported diagnosis.<\/p>\n

\n\n\n\n\n\n\n
Proposed measurement task<\/th>\nLocation description to request<\/th>\nInterpretation boundary<\/th>\n<\/tr>\n<\/thead>\n
Accessible conductor surface near a connection<\/td>\nNamed joint, phase and permitted surface on a referenced drawing<\/td>\nDo not identify the reading as the hidden contact-interface temperature<\/td>\n<\/tr>\n
Cabinet environmental context<\/td>\nCompartment, air measurement position and surrounding obstructions<\/td>\nDo not substitute it for a conductor-temperature point<\/td>\n<\/tr>\n
Comparison between corresponding connections<\/td>\nIndividually identified positions with installation context recorded<\/td>\nSimilar labels alone do not establish equivalent measurement conditions<\/td>\n<\/tr>\n
A location unavailable to the selected sensor<\/td>\nExplain the access or mounting restriction<\/td>\nMark the coverage gap rather than claiming indirect coverage<\/td>\n<\/tr>\n<\/tbody><\/table><\/figure>\n

This table is a planning aid, not a list of approved attachment positions. The switchgear manufacturer and the selected sensor documentation must determine what can actually be installed.<\/p>\n

Build the location register from equipment drawings<\/h2>\n

Use the current equipment drawing as the base record. Give every proposed point a stable identifier before creating receiver labels or ordering hardware. The identifier should survive a change in screen layout, a replacement sensor or a revised panel number. Keep the equipment designation and the measurement designation in separate fields.<\/p>\n

A useful entry describes the connection in ordinary language and gives a drawing reference. \u201cOutgoing cable termination, phase B, rear compartment\u201d is more reproducible than \u201cmiddle sensor.\u201d If the layout contains several similar connections, add the bay or feeder designation. If the equipment maker uses different phase naming, retain that convention throughout the schedule rather than mixing it with a second scheme.<\/p>\n

Separate the intended surface from the visible object. A photograph can show a cable, an insulated conductor and a joint assembly in the same frame, while leaving the proposed contact area ambiguous. Add a marked drawing or a controlled photograph prepared under the site’s approved access arrangements. The picture should identify the proposed position without becoming permission to remove insulation or modify the assembly.<\/p>\n

Create an approval-state field with meaningful values: proposed, manufacturer review required, approved for the named configuration, installed and verified, or excluded. Avoid a single \u201ccomplete\u201d checkbox that conceals whether the point has merely been drawn or has actually been checked on the equipment.<\/p>\n

The location register should also preserve changes. When a proposed position moves, keep the earlier reference and the reason for revision. Otherwise an installer can follow an old drawing while the receiver uses the new name, leaving a convincing but incorrect data label in the monitoring system.<\/p>\n

Nearby surface, air and hidden-interface quantities are not interchangeable; this is a scope exhibit, not a mounting drawing.<\/figcaption><\/figure>\n

Resolve mounting restrictions before buying the sensor<\/h2>\n

Ask for the selected sensor’s installation instructions and the switchgear manufacturer’s acceptance of the proposed location. The review should identify the permitted mounting surface and method, the space occupied by the sensor and its attachment, access restrictions, and any insulation or clearance considerations that require equipment-specific confirmation.<\/p>\n

Do not borrow an attachment method from a superficially similar product. A strap-mounted battery-powered sensor and a self-powered sensor may have different requirements. RITOKS currently describes the LSMT3\/M wireless temperature sensor family<\/a> as strap-mounted and battery-powered, requiring a matched receiver. That family description does not establish permission to fit it to every joint or switchgear arrangement. Reception inside metal enclosures needs its own survey; see wireless temperature sensor receiver checks<\/a>.<\/p>\n

Schneider’s medium-voltage implementation example assigns factory installation to new equipment and specifies its qualified service personnel for retrofit work. The useful lesson is that installation ownership is part of the system specification. Those instructions belong to that documented system; they do not authorize a RITOKS sensor retrofit or imply that another supplier follows the same service model (Schneider Electric, 2023b).<\/p>\n

For purchasing, identify who must resolve the location question before quotation and who approves the final drawing. If the available information is insufficient, request the missing drawing or installation review. Ordering a sensor first and treating its physical fit as approval reverses the decision sequence.<\/p>\n

An inaccessible point should remain a documented gap. Do not move the sensor to an easier surface and retain the original label without explaining the change in measured quantity. If the revised position serves a different task, create a different point description and obtain the corresponding approval.<\/p>\n

Keep measurement identity and communication identity aligned<\/h2>\n

Each location needs a traceable link to the physical sensor and the receiving system. Record the sensor identity, the location identifier, the receiver association and the display name. These fields should agree, but they should not be collapsed into one label that becomes invalid when hardware is replaced.<\/p>\n

Decide how the system distinguishes an available temperature reading from missing or stale data. The exact supported behavior belongs to the selected receiver and software documentation. Procurement should ask for that behavior explicitly rather than assuming that a blank value, a retained value or an alarm symbol always means the same thing.<\/p>\n

The location plan also needs the surrounding enclosure context for the separate communication review. Record the compartment and intended receiver arrangement, then verify the actual selected system under its installation conditions. Do not infer wireless coverage from a generic open-space range figure or declare that temperature placement alone proves reception.<\/p>\n

Keep these reviews distinct. Moving a sensor solely to improve communication may change the measurement location. Moving a receiver may change the system arrangement without changing the intended measurement task. A revision record should explain which problem was being solved and what needs to be checked again.<\/p>\n

\n\n\n\n\n\n\n\n\n
Register field<\/th>\nInformation to capture<\/th>\nWhy it remains separate<\/th>\n<\/tr>\n<\/thead>\n
Measurement point<\/td>\nEquipment, connection, phase and purpose<\/td>\nDefines the question being observed<\/td>\n<\/tr>\n
Mounting reference<\/td>\nApproved surface, attachment instruction and drawing revision<\/td>\nDefines the permitted physical arrangement<\/td>\n<\/tr>\n
Sensor identity<\/td>\nExact order code and individual identifier<\/td>\nSupports replacement and traceability<\/td>\n<\/tr>\n
Receiver association<\/td>\nMatched receiving equipment and configured point name<\/td>\nConnects the physical point to its reported data<\/td>\n<\/tr>\n
Verification record<\/td>\nActual installed-position check and data-identity check<\/td>\nDistinguishes a proposal from a completed installation<\/td>\n<\/tr>\n
Unresolved items<\/td>\nMissing approval, coverage gap or undocumented system behavior<\/td>\nPrevents unknowns from appearing as accepted decisions<\/td>\n<\/tr>\n<\/tbody><\/table><\/figure>\n

Use the same register in the RFQ and handover record. A supplier can then respond to defined missing fields rather than guessing what \u201ccomplete temperature monitoring\u201d includes.<\/p>\n

\"Offset
Document and verify the point mapping separately; names alone do not establish reception or installed position.<\/figcaption><\/figure>\n

Work through a conditional location review<\/h2>\n

Consider an illustrative drawing with an outgoing connection that the buyer wants to monitor. The first proposal describes the point only as \u201coutgoing temperature.\u201d No field result or temperature value is assumed in this example.<\/p>\n

The reviewer requests the equipment designation, the phase, the intended measured surface and the mounting instruction. The drawing is then revised to identify an accessible surface adjacent to the named connection. The equipment manufacturer still needs to decide whether that position and attachment are acceptable. Until that decision exists, the register remains proposed rather than approved.<\/p>\n

Suppose the chosen sensor cannot be installed at that position under the approved arrangement. The buyer has two different questions to resolve: whether another permitted position would still answer the original measurement task, and whether a different sensor or system is required. These are not equivalent substitutions. A nearby air reading cannot silently take the place of the planned surface measurement.<\/p>\n

Once the physical position is accepted, the receiving-system record can be tied to that point. During handover, the team checks the installed identity against the location schedule and confirms that the reported point name refers to the intended sensor. The example ends with a traceable position record, not a claim that the connection is safe or that every fault will be detected.<\/p>\n

Prepare the RFQ and the handover package<\/h2>\n

Send the location schedule, equipment drawing revision and proposed monitoring purpose with the enquiry. Include the allowed access arrangements and identify who owns installation approval. Ask the supplier to mark unresolved sensor and receiver requirements against the same schedule, so exclusions remain visible in the quotation.<\/p>\n

For the sensor family, use the relevant published product information within RITOKS electrical measurement and monitoring<\/a> as a sourcing starting point. Request the exact orderable configuration and its supporting documents. A published family page is not a substitute for an approved location drawing, a system bill of materials or the final acceptance record.<\/p>\n

The handover package should contain the final location register, approved mounting references, individual sensor identities, receiving-system point mapping and recorded exclusions. If photographs are permitted, identify their position and revision rather than delivering an unlabeled folder. Keep proposed additions separate from the installed set.<\/p>\n

Agree how later changes will be recorded. Replacing a sensor should retain the measurement purpose while updating its hardware identity. Changing the mounting position requires a new location review. Adding a receiver or changing software names requires the relevant system checks. This separation keeps the original planning work useful after commissioning.<\/p>\n

Foire aux questions<\/h2>\n

Can one sensor represent an entire switchgear compartment?<\/h3>\n

Only describe the quantity and position that the selected arrangement actually measures. A single point does not automatically establish the condition of all connections or the entire compartment. Document the coverage scope and any gaps rather than expanding the label to imply complete coverage.<\/p>\n

Is the nearest available surface always a suitable location?<\/h3>\n

No. Physical access does not establish the measurement relationship or mounting permission. Define the target question, identify the proposed surface and obtain the equipment-specific installation acceptance before treating that position as part of the approved plan.<\/p>\n

Should an ambient sensor use the same point label as a contact sensor?<\/h3>\n

No. Keep environmental context and conductor-related measurements distinguishable in the register and display. If both are used, describe how the selected system interprets them without assuming that one reading substitutes for the other.<\/p>\n

What if a location cannot be approved before ordering?<\/h3>\n

Keep it unresolved in the RFQ and identify the document or review needed to close it. Do not count the point as accepted coverage. The quotation should make the missing installation decision visible rather than burying it in a general completeness statement.<\/p>\n

R\u00e9f\u00e9rences<\/h2>\n
    \n
  1. Schneider Electric. (n.d.). SureSeT medium voltage indoor switchgear user guide: Product description<\/em>. NNZ9886800EN, Rev. 01. https:\/\/productinfo.se.com\/sureset_tech_lit\/nnz9886800-sureset-mv-indoor-switchgear-user-guide\/English\/NNZ9886800%20(bookmap).xml\/$\/ProductDescription-8AF53126<\/a><\/li>\n
  2. Schneider Electric. (2023a). Continuous thermal monitoring: Inputs<\/em>. EcoStruxure Power Digital Applications, 0100DB2304. https:\/\/productinfo.se.com\/esxp_digital_apps_nema\/ctm\/English\/BM_ESXP_DG_Continuous_Thermal_Monitoring_NEMA_0001112278.xml\/$\/ESXP_DG_CTM_SD_Inputs_0001005407<\/a><\/li>\n
  3. Schneider Electric. (2023b). Implementation for MV switchgear and transformers<\/em>. EcoStruxure Power Digital Applications, 0100DB2304. https:\/\/productinfo.se.com\/esxp_digital_apps_nema\/viewer?docidentity=ImplementationForMVSwitchgearAndTra-B83656B1&extension=xml&lang=en&manualidentity=CTM-NEMA-099128DB<\/a><\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    Plan named measurement points, approved mounting references and sensor-to-receiver identities before procuring switchgear temperature monitoring.<\/p>","protected":false},"author":1,"featured_media":2633,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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