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Bracium Contactus Insulatum 1250A – 3150A
Bracium contactus T2 ex cupro cum vestimento insulatorio ex silicio vulcanizato. Impedit fulgurationem inter fases in umidis ambientibus Gulfi. Nostri Bracii Insulati Contactus sunt componentes critici ad usum in connexionibus inferiorum braciorum bus interruptorum circuitus vacui (VCB) manualem. Certificati ab 1250A usque ad 3150A, hi bracii includunt vestimentum insulatorium ex caoutchouco silicii vulcanizati aut ex materiale contrahibile per calorem super conductorem principalem. Haec constructio praebet robustam barrierae dielectricae, minuens notabiliter periculum fulgurationis inter fases in compactis apparatibus interruptoribus. Ingenio facti pro durabilitate in difficultibus ambientibus, hi bracii sunt essentiales ad servandam integritatem insulationis et fiduciam longae durationis systematum distributionis electricae medi-voltarum, praesertim in humidis et pollutis locis industrialibus.
- Praevisio
- Applicationes
- Technical Data
- Services
- Controlus qualitatis
- Producta Recommandata
Bracchia Isolati di Contatto – 1250 A a 3150 A per Interruttori Automatici a Vuoto
Il braccio di contatto è il conduttore in rame che collega il terminale dell’interruttore a vuoto al contatto a tulipano del carrello dell’interruttore, trasportando la corrente nominale attraverso l’insieme mobile. Bracci superiore e inferiore sono montati per ogni polo. MOLDVOLT produce bracchia isolati di contatto da 1250 A a 3150 A per interruttori automatici estraibili da 12 kV e 24 kV.
PERCHÉ ESISTE LA GUAINA ISOLANTE
Su un braccio di contatto in rame nudo, la distanza di isolamento tra fasi all’interno dell’interruttore è fissata dalla distanza tra i centri dei poli – 210 mm a 12 kV, 230 mm a 24 kV. In aria pulita e asciutta ciò è sufficiente. Nelle condizioni reali operative dei nostri mercati, spesso non lo è.
Humidity and condensation reduce air's dielectric strength. Conductive dust bridges part of the gap. Salt fog deposits a hygroscopic film that becomes conductive when damp. Under any of these conditions the effective clearance falls below the design value, and a phase-to-phase flashover across the contact arms becomes possible — a fault that occurs inside the breaker itself, destroys the unit and usually the panel compartment with it.
A vulcanised silicone rubber or heat-shrink insulation jacket over the arm removes the air path as the sole insulating barrier. The jacket is why the same breaker design can serve a humid coastal African substation, a Gulf site with airborne salt and sand, and a CIS panel subject to condensation during winter start-up.
CONDUCTOR AND CURRENT DENSITY
T2 gradus cuprum electricum verificatum per certificatum fabricae, cuius sectio transversa dimensionata est ad transportandum currentem nominalem intra limitem augmenti temperaturae 70 K secundum IEC 62271-1. Hoc magis importat in brachio contactus quam in barra statica, quia brachium clauditur intra conformationem interruptoris ubi refrigeratio convectiva limitata est — brachium dimensionatum ut si esset barra in aere libero calidum erit.
Facies contactus in utroque extremo argento plumbatae sunt ad spissitudinem 8–12 micronum, verificata per fluorescencem radii X pro singulis partibus, cum plumbatura stanni disponibili pro atmosphaeris litoralibus et industrialibus.
DUTUM MECHANICUM
Brachium sustinet onus mechanicum vim contactus interruptoris vacui in omni operatione — decies milia cyclorum per vitam interruptoris — simul manens stabile in dimensionibus, ut alignatio contactuum servetur. Flexurae et terminations formantur potius quam soldantur, ubi possibile est, evitando mutationes structurae granulorum et concentrationes tensionis quas iuncturae soldatae inducunt.
Copia
Supplied as OEM production to drawing and as replacement spares for VS1, VD4 and equivalent breakers. Where the original part is obsolete, send a sample or dimensioned drawing and we will produce an equivalent.
Applicationes principali
- Upper and lower contact arms in VS1-12, VS1-24, VSG-12 and VSG-24 vacuum circuit breakers.
- Contact arms in VD4, VPR and equivalent withdrawable breakers.
- Connection conductors between vacuum interrupter terminals and trolley tulip contacts.
- Fixed breaker conductor arms in panel-mounted VCB installations.
- Replacement spares for breaker refurbishment across the installed base in Africa, CIS and the Middle East.
- Breaker refurbishment and switchgear service workshop stock.
- Panel builder and breaker assembler production stock.
- Retrofit projects where a breaker is rebuilt to serve an existing panel.
WHY THIS IS A REFURBISHMENT STAPLE
Vacuum circuit breakers saepe renovantur potius quam substituuntur: interruptores vacuum et mechanismus fortasse adhuc utilis sunt, dum brachia contactuum perdidere plating, discolorationem propter calefactionem, degradationem vestis insulationis aut damnum mechanicum ex fault transverso. Substitutio brachiorum restituit interruptorem ad fractionem parvam pretii substitutionis.
Haec est activitas magna in mercatus nostros, ubi antiqua basis installata interruptorum VS1 et VD4 diu manet in usu postquam fabricator originalis auxilium sustulit. Rara disponibilitas partium reservarum semper citatur ut praecipua impeditio in acquisitione electrica Medii Orientis et Africae, et brachia contactuum sunt inter res quae maxime requiruntur et minime reponuntur.
Quando Substituere
Replace when any of the following is found: insulation jacket cracking, hardening or tracking marks; plating loss or pitting on contact faces; discoloration indicating past overheating; deformation from through-fault electromagnetic forces; or contact resistance measurably above the commissioning baseline.
Indicium Selectionis
Specify by rated current, breaker model and pole centre distance, arm geometry and terminal hole pattern, insulation type — vulcanised silicone or heat-shrink — and plating appropriate to the environment.
Congruentia Regionalis
- Middle East: airborne salt and sand plus high ambient temperature make the insulation jacket essential rather than optional; tin plating for coastal sites.
- Africa: humid coastal and industrial environments with very high refurbishment demand.
- Russia and CIS: condensation during winter start-up is a real flashover risk; verified low-temperature jacket flexibility is required, since some insulation materials embrittle at -40 C.
- Europa Orientalis: servitium IEC normale in cameris temperatis commutandis.
Non idoneus pro
Ratinges currentis supra typum electum. Modellos interruptorum ubi geometria nondum confirmata est. Applicationes quae conductorem nudum, non isolatum requirunt.
| CATEGORIA | Parametrum | Pretium / Specificatio |
|---|---|---|
| Electricum | Voltage aestimatum | servitium interruptoris 12 kV / 24 kV |
| Rated Current | 1250 / 1600 / 2000 / 2500 / 3150 A | |
| Currentem brevi tempore sustinendam | 25 kA / 31.5 kA per 4 s, ad ratingem interruptoris adaptatum | |
| Cūrrentem ad tolerandum apicem | 63 kA / 80 kA | |
| Temperatura ascensus nominis | Intra 70 K secundum IEC 62271-1 ad currentem nominalem | |
| Contactus Resistentiæ | Mensuratum et notatum pro singulo exemplari | |
| Conductor | Materia fundamentalis | Cuprum electrolyticum gradus T2 |
| Verificatio Materialis | Certificatum fabricae conservatum pro singula parte | |
| Conductio | Minimum 97% IACS | |
| Area transversa | Dimensionatus ad currentem nominalem cum permisso pro refrigeratione convectiva restricta intra clausuram interruptoris | |
| FORMANDUM | Curvaturae et terminationes formatae potius quam soldatae, ubi geometria permittit, evitando mutationem structurae granulorum et concentrationem tensionis | |
| Placatio faciei contactus | Placatio argentea 8–12 micrometra standard; placatio stanni disponibilis pro atmosphaeris litoralibus et industrialibus | |
| Verificatio placationis | Mensura per fluorescencem radii X, annotata pro singulis partibus | |
| Insulatio Tunicam |
Typus | Cauliculus vulcanizatus silicium-rubber, aut polyolefinum thermoretrahibile |
| Fortitudo Dielectrica | 20 kV/mm minimum | |
| Index comparativus trahendi (CTI) | 600 minimum pro silicio | |
| Temperatura range | −40 °C ad +150 °C pro siliconem; −40 °C ad +105 °C pro thermoretractilem | |
| Resistentia flammae | Gradus UL94 V-0 disponibilis | |
| Adhaesio | Plene coniunctum ad conductorem, nullum interstitium aëreum in interfacie | |
| Coverage | Longitudo brachii integra, exceptis faciebus contactus et areis terminalibus | |
| Mechanicum | Geometria brachii | Ad schemata, adaptatum ad modellem interruptoris et distantiam centrorum polorum |
| Compatibilitas cum distantia centrorum polorum | 210 mm (12 kV) / 230 mm (24 kV) | |
| Patro foraminum terminalium | Ad specificatonem clientis | |
| Vita Mechanica | Adaptatum ad mechanicam durabilitatem interruptoris, minimum 30 000 operationes | |
| Compatibilitas | VS1, VD4, VPR et footprints de disjoncteurs équivalents | |
| Servitium Conditiones |
Temperatura operationis | −40 °C usque ad +105 °C |
| Humiditas | Adapté aux services tropicaux et à forte humidité | |
| Pollutionem | Gaine isolante spécifiée pour les environnements humides, poussiéreux, salins et condensants | |
| Experientia chaque pièce ou lot |
Mesure de la résistance de contact | — |
| Vérification de l’épaisseur du placage | Par fluorescence X | |
| Essai diélectrique de la gaine isolante | — | |
| Dimensional inspection | Dimensions critiques d’ajustement vérifiées à 100 % | |
| Verificatio conductibilitatis materialis | — | |
| Inspectio visualis | Pro defectibus iacquetarum, vacuitatibus et damno plating | |
| Verificatio incrementi temperaturae | In exemplaribus typicis | |
| Flexibilitas iacquetarum ad temperaturas infimas | Pro usu secundum GOST 15150 | |
| Optiones | Genus Isolantis | Insulatio silicis vulcanizata aut thermoretractilis |
| Plating litorale / industriale | Plating stanni pro atmosphaeris litoralibus et industrialibus | |
| Geometria ad usum specialem | Geometria, longitudo et schema terminalium ad desideratum | |
| Marca & Conpackaging | Numeratio partium clientis et impachatio | |
| Tunica igni-resistens | Tunica UL94 V-0 | |
| Tunica verificata ad temperaturas infimas | Ad usum climaticum GOST 15150 | |
| Ingénierie inverse | Ex exemplari physico pro interruptoribus obsoletis |
SPECIFICATIO ET ORIGO
- Mitte figuram, exemplar physicum aut photographiam cum numero partis existentis; nos identificabimus aequivalentem et confirmabimus aptitudinem antequam ordinationem firmes.
- Inversa ingenieria ex exemplari physico ubi pars originalis obsoleta est aut OEM iam non supplet eam — frequens pro antiquis tabellis KYN28, HXGN et importatis quae adhuc in usu sunt per Africam, CIS et Medio Orientem.
- Production OEM et production sous marque privée selon vos plans, avec votre numérotation de pièces et votre emballage.
- Matériau et placage choisis pour l'environnement de destination : placage argent pour la résistance de contact la plus faible en intérieur, placage étain pour les atmosphères côtières et industrielles où le brouillard salin et les sulfures attaquent l'argent.
POURQUOI CELA A DE L'IMPORTANCE COMMERCIALE
L'expertise technique locale limitée et la difficulté d'approvisionnement en pièces de rechange sont constamment identifiées comme les principaux obstacles sur les marchés électriques du Moyen-Orient et d'Afrique. Un tableau est hors service pendant toute la durée nécessaire à la livraison de la pièce. Nous gardons les articles consommables en stock et fournissons des listes de pièces de rechange pour flotte basées sur votre parc installé, afin que la pièce soit disponible avant même qu'elle ne soit nécessaire.
Quantitas et tempus ducens
- Articles en stock expédiés depuis l'inventaire ; délai de production typique de 15 à 25 jours pour les spécifications standard.
- Faibles quantités minimales de commande pour les pièces standard — nous fournissons des remplacements d'urgence unitaires ainsi que des volumes de production en gros.
- Fractura aeria pro situationes de defectu, fractura maritima per consolidation pro restockage planificatu.
Testatio et Documentatio
- Testes routine secundum standard IEC applicabile, con resultatus fornitu per batch.
- Certificates de material, reportus de spessore de plating e registros de inspectione dimensional disponibile super requestu.
- Supporto pro certificatione pro submissiones SONCAP, KEBS PVoC, SABER e GOST R, ubi le componente es expedito como un consignation independente.
Post-Venditio
- Responsa technic in 24 horas; supporto de ingeneria pro applicationes pro aptatio, torque de assembly e intervallos de maintenance.
- Garantia contra defectus de fabrication e de material: 12 menses ab le die de delivery.
- Accordos quadro e de chiamata disponibile pro constructores de panellu, utilitates e officinas de service pro interruptores.
Moderatio Materiae
- Cuprum verificate como cuprum electrolytic T2 o como alloy specificate de cuprum-argento, con certificates de mille retinute per batch.
- Epoxy resin verificatus est ut gradus cycloaliphaticus, cum tempore gelationis, viscositate et ratione pigmenti documentatis; resina bisphenolica ad usum generalem non admittitur pro servitio extra aedem aut in humiditate alta, ob deteriora eius resistencia ad formandos tractus et ad radiationem ultraviolettam.
- Spissitudo placationis mensurata est per fluorescencem radii X et annotata pro singulis partibus — typice 8–12 microna argenti in superficiebus contactuum. Sub-placatio non apparet in momento traditionis et solum post annos manifestatur ut defectus thermalis; ideo haec mensuratur, non supponitur.
Processus Imperium
- Fusio APG (Automatic Pressure Gelation) sub temperatura formae, pressione injectionis et tempore gelationis regulatis, producens matricem sine vacuitatibus. Vacuitates initiant descensum partiale, quod est causa ultima perforationis isolatoris in usu.
- Exsiccatio sub vacuo resinæ ante injectionem, ut aer inclusus tollatur.
- Ciclus post-curationis regulatus ad tensiones internas minuendas et dimensiones stabilizandas.
- Contactus digitus molla vis calibrata et verificata ad specificatio, ut currentis aequa distributio per omnes digitos certificetur.
TESTINGUS ORDINARIUS - OMNIS PIECE AUT OMNIS BATCH
- Testus partialis descensus in componentibus insulationis, typice infra 10 pC ad 1,1× tensionem nominalem.
- Testus tensionis sustentationis ad frequentiam potentiae.
- Mensura resistentiae contactus in partibus currentem portantibus.
- Inspectio dimensionum ad schemata, cum dimensionibus criticis aptationis 100 % inspectis.
- Inspectio visualis pro rimis, vacuis, defectibus plating et finitione superficiei.
- Testus oneris mechanicus in insulatoribus contra fortitudinem nominalem cantilever.
Experimenta typorum
- Insulatores verificati ad IEC 60168 et IEC 62217; contactus et partes conductivae verificatae pro incremento temperaturae intra limitem 70K secundum IEC 62271-1 ad currentem nominalem.
- Cycli thermici et, pro partibus ad usum litoralem destinatis, testus corrosivus nebulae salinae.
TRACEABILITAS ET SYSTEMA
- Systema gestionis qualitatis ISO 9001.
- Numeratio partium finitarum, quae materiam primam et acta processus referunt.
- Certificata conformitatis, certificata materialis et relationes experimentorum cum singulis expeditionibus emittuntur.
- Exemplaria retenta pro singulis partibus productionis ad usum futurum, si qua quaestio in campo oritur.
