EN
HXGN-24 Fixed-Type Ring Main Unit - 24kV Compact Switchgear
- Praevisio
- Applicationes
- Technical Data
- Services
- Controlus qualitatis
- Producta Recommandata
HXGN-24 Fixed-Type Ring Main Unit - 24kV Compact Switchgear
HXGN-24 extends the fixed-type ring main platform to 24kV, serving secondary distribution on 20kV and 22kV networks. Like the 12kV version it combines a three-position load break switch, earthing switch and optional HV fuse protection in a compact air-insulated metal-enclosed cabinet, but with the larger clearances and higher insulation level that 24kV service demands.
WHY THE 24kV CLASS EXISTS
Panellum 24 kV non est arca 12 kV renominata. Tensio sustinenda ad frequentionem potestatis crescit ad 50 kV, et tensio sustinenda ad impulsum fulminis ad 125 kV in vertice, quae maioras distantias inter fases et inter phases et terram, componentes epoxy physice maiores, et arcam altiorem requirunt. Hoc commercio refert, quia distributio 20 kV et 22 kV expanditur: utilitates Europae Orientalis 20 kV ut tensionem distributionis praecipuam operantur, et rete Gulf in UAE et Qatar 22 kV una cum 11 kV operantur. Specificare unitatem 12 kV pro his retibus non est pars pecuniae conservata, sed defectus dielectricus qui exspectat ut accidat.
COMMUTATIO TRIPLEX ET OPERATIO ANULARIS
The load break switch provides Closed, Open and Earthed positions from a single interlocked mechanism, giving a visible positive earth before cable work with no separate earthing device. In ring configuration, two units carry the incoming and outgoing ring cables while a third feeds the local transformer, so a cable fault is isolated by reconfiguring the ring rather than by losing supply to every downstream customer.
AIR INSULATION AND THE F-GAS QUESTION
HXGN-24 is air insulated. For EU and Eastern European buyers this is increasingly a procurement advantage rather than a technical compromise: there is no SF6 inventory to report, no leakage monitoring obligation and no end-of-life gas recovery requirement. Where the installation environment is severe — coastal salt fog, desert dust, flood risk or below-grade siting — a sealed gas-insulated unit remains the more durable choice and should be specified instead.
Adaptatio environmentalis
IP3X est standard, IP4X est disponible. Pour les installations dans le Golfe, une évaluation de déclassement est effectuée selon la température ambiante réelle de 50–55 °C, et non selon la référence IEC de +40 °C. L’alimentation pour les pays de la CEI est disponible en versions climatiques GOST 15150, avec chauffage anti-condensation et lubrifiant adapté aux basses températures.
Applicationes principali
— Distribution secondaire sur réseaux d’Europe orientale à 20 kV : Pologne, Roumanie, Bulgarie, Hongrie, Serbie.
— Distribution à 22 kV aux Émirats arabes unis, au Qatar et dans l’ensemble de la région du Golfe.
— Sous-stations compactes et préfabriquées destinées aux développements résidentiels, commerciaux et légers industriels alimentés en 20 kV ou 22 kV.
— Points de commutation pour alimentation en anneau urbaine sur réseaux câblés à 20 kV et 22 kV.
— Distribution interne dans les parcs industriels et les zones franches.
— Collecte d’énergie renouvelable à 22 kV, où la tension de collecte plus élevée réduit les pertes dans les câbles sur les grands sites solaires et éoliens.
— Protection des transformateurs via combinaison d’interrupteur-sectionneur de charge et de fusible HT.
— Réticulation municipale, y compris les réseaux sud-africains à 22 kV.
CONFIGURATIONES TYPOLOGICAE
Two-unit ring in / ring out; three-unit with transformer feeder; four-unit and above with additional feeders or metering. Field-extensible as the network develops.
Congruentia Regionalis
- Eastern Europe: mainstream 20 kV distribution, supplied to EN 62271-200. Air insulation avoids F-Gas obligations.
- UAE and Qatar: 22 kV distribution, subject to DEWA and KAHRAMAA material approval.
- Russia and CIS: 20 kV urban networks, GOST R certified with climatic version marking.
- Africa: reticulatio municipalis et industrialis 22 kV, praesertim in Africa Australi.
Non idoneus pro
33 kV and 35 kV networks — specify the 40.5 kV class. Applications needing full short-circuit breaking on every feeder without fuses — specify a withdrawable breaker panel. Severe environments with flooding, heavy dust or salt fog — specify a sealed gas-insulated unit. Networks at 10 kV or 11 kV, where HXGN-12 is correct and more economical.
TECHNICAL DATA — HXGN-24
Compliance: IEC 62271-200, IEC 62271-103
| CATEGORIA | Item | Details Parametri |
| Electrical Ratings | Voltage aestimatum | 24 kV |
| Frequentia censita | 50 Hz / 60 Hz | |
| Tensio nominis ad sustentationem frequentiae potestatis (1 min) | 50 kV | |
| Rated lightning impulse withstand voltage (BIL) | 125 kV ad verticem | |
| Rated Normal Current | 630 A | |
| Classificatus brevis temporis perferentia cursus | 20 kA pro 4 s | |
| Rated Short-Circuit Making Current | 50 kA in vertice | |
| Capacitas interrumpendi interruptoris oneris | 630 A | |
| Fuse-protected transformer circuit breaking | up to 31.5 kA with HV fuse | |
| Construction | Medium Insulationis | aer |
| Switch Type | three-position load break switch — Closed / Open / Earthed | |
| Gradus Protectionis | Norma IP3X; opzione IP4X | |
| Theca | accipiter laminatus frigide, coopertus pulvere RAL 7035 | |
| Materies Busbar | copper | |
| Connexio Funis | ingresso inferiore, morsetto avvitato o connettore separabile | |
| Operatio | levus manualem standardem; motorizatum AC/DC 110 V vel 220 V optionale | |
| Interlocking | meccanico, che impone la sequenza interruttore-terra-porta | |
| Dimensiones | Latitudo unitatis | 500 mm / 600 mm a seconda della funzione |
| Altitudo Unitatis | 1800 mm / 2000 mm | |
| Profondità unità | 1100 mm / 1200 mm | |
| Pondus Approximatum | 300–450 kg per unità | |
| Status servitii | Ambiens Temperature | −10 ℃ a +40 ℃ secondo IEC; fino a +55 ℃ con riduzione di potenza |
| Altitudo | usque ad 1000 m standard; usque ad 2000 m pro petitione | |
| Humiditas relativa | medius diurnus non ultra 95% |
Optiones
Protezione fusibile ad alta tensione per circuiti trasformatore | meccanismo di manovra motorizzato | riscaldatore anti-condensa | indicatore di passaggio guasto cavo | indicatore presenza tensione | aggiornamento IP4X | versione climatica GOST 15150 | predisposizione per scaricatore di sovratensione | accoppiamento sbarre estensibile
PRE-SALES ENGINEERING
- Revision of single-line diagram and development of panel schedule from your load list.
- Equipment selection verified against destination grid: 11kV/13.8kV/22kV/33kV (Middle East, Africa), 6kV/10kV/35kV (Russia & CIS), 10kV/20kV/35kV (Eastern Europe). Saudi Arabian projects are designed and verified at 60 Hz.
- Ambient derating study. IEC 62271-1 rates equipment at +40 °C; we recalculate continuous current for 50–55 °C Gulf conditions or supply GOST 15150 climatic versions (UHL1 to −60 °C) for CIS sites.
- Short-circuit and protection coordination check against your upstream fault level.
- 2D/3D general arrangement drawings, foundation and cable-entry layouts before production release.
MARKET ACCESS AND DOCUMENTATION
We prepare the technical dossier behind the approval, which is normally the longest item on the project critical path:
- Arabia Saudita: certificatum producti SASO / SABER (PCoC) et certificatum pro singulis expeditionibus (SCoC); auxilium ad approbationem materialis SEC et examinatio acceptationis fabricae testata.
- UAE / Qatar / Kuwait / Oman: fasciculi documentorum pro registratione suppeditantis DEWA, approbatione materialis KAHRAMAA, submissione MEW et approbatione producti Oman DCRP (obligatorium ex anno 2018).
- Iraq: certificatum conformitatis ICIGI per corpora inspectionis a COSQC nominata.
- Africa: PC et SC SONCAP pro Nigeria, PVoC KEBS (via Iter A/B/C) pro Kenya, certificata TBS / UNBS / GSA alibi. Inspectio ante expeditionem et sigillatio contineris coordinata cum agente nominato.
- Russia et CIS: certificatio GOST R pro apparatibus mediis tensionis, cum auxilio representantis autorisati EAEU.
Notandum est quod prima approbatio utilitatis saepe biennium ad duodecim menses occupat, secundum auctoritatem. Hoc incipere debet simul cum collocatione ordinis, non post.
ACCEPTATIO FABRILIS ET DELIVERIA
- Probae regularis pro omni tabula secundum IEC 62271-200: resistentia ad tensionem frequentialis, resistentia circuitus principalis, operatio mechanica, verificatio interbloccorum, functio circuitus auxiliaris.
- FAT (Testis Acceptationis a Fabrica) testificatus ab cliente vel tertio partibus (SGS, BV, TUV, Intertek) disponibilis ad petitionem. Proiecta SEC in Arabia Saudita requirunt FAT testificatum ab ingeniore SEC.
- Impacatio exportatoria maritima: cassa ex ligno compresse, desiccans, barriera contra umorem, indicatores impulsus et inclinationis pro confectionibus MV.
- Series documentorum: relationes probationum, certificata probationum typicarum, schemata generalia et diagrammata, manuale operationis et manutenctionis, index partium reservarum, index impacationis. Manuales disponibiles sunt Anglice, Russice, Gallice et Arabice.
Post-Venditio
- Supervisio commissionis et directio installationis in loco, per viam remotam aut per missionem ingeniarii.
- Formatio operatorum et manutenctorum, in loco aut per viam electronicam.
- Index partium reservarum biennalis recommendatus, citatus una cum ordinatione — modus efficacissimus unicus ad evitandos moras longiores in mercatis ubi partes locales non sunt disponibiles.
- Responsum technicum intra 24 horae; res consumibiles (contactus, insulatoria, bobinae, mechanismi) in magazino retinentur ad expeditam expeditionem.
- Garantia: 18 mensium ab expeditione aut 12 mensium ab inauguratione, quod prius exspirat. Condicio protracta negotiari potest pro conventionibus quadramentalibus.
VERIFICATIO DESIGNIS ET EXAMEN SPECIFICUM
- Examina specifica secundum IEC 62271-200 pro interruptoribus metallicis inclusis AC: tolerantia tensionis frequentialis et impulsum fulminis, correntis toleratae brevi tempore et maxime, incrementum temperaturae, capacitas connexiones faciendi et dissolvendi, durabilitas mechanica, et gradus protectionis.
- Classificatio arcus interni (IAC) per experimentum verificata, cum valvulis liberationis pressionis et canalis exhaustus probatis ut arcum continerent et operatorem protegerent. Haec est qualificatio distincta a tolerantia dielectrica et in documentis licitationis expressim petenda est.
- Raportus de examinatio ab tertio facto ex KEMA, ASTA, CESI aut TUV disponibiles. Nota quod certificatum ASTA signatur ab observatore ASTA qui responsabilitatem pro raportu suscipit, quare utilitas et procuratio EPC eum aliter tractant quam proprium fabricantis documentum de examinatio.
Controlus materiae ingressae
- Interruptores vacui, mechanismi operantes, relais protectionis et transformatoribus instrumentorum solum ex fornitoribus qualificatis accepti secundum certificatum conformitatis.
- Barrae cupreae verificatae pro conductivitate, sectione transversali et spissitudine plating.
- Componentes insulationis epoxy testatae pro descensu partiali in receptione.
- Spissitudo laminae ferreae et spissitudo pelliculae pulveris-coat per singulos lotos verificatae; finitio normalis RAL 7035.
Inspectio in cursu productionis
- Examinatio dimensionum et quadratura carchasiae post fabricationem.
- Verificatio torque barrae bus cum clavibus calibratis, annotata pro singulo iunctura.
- Verificatio wiring punctum-ad-punctum contra schemata approbata ante energisationem.
- Ordo interlock mechanicus in omni tabula probatus: interruptor non potest in locum rapi cum interruptore terrae clauso; interruptor terrae non potest claudi cum interruptore clauso; ostium compartimenti cavi non potest aperiri nisi terra fiat.
TESTINGUS ORDINARIUS — OMNIS TABULA, NULLUM SAMPLING
- Tensio retinenda ad frequentiam potentiae in circuitibus principalibus et auxiliaribus.
- Mensura resistentiae circuitus principalis, comparata ad basim designi.
- Testus operationis mechanicus per totam seriem Servitium / Testus / Isolatus.
- Testus functionum protectionis et controlis, incl. trip et close ab relecto.
- Verificatio gradus protectionis et pelliculae picturae.
- Ad singulam tabulam datur relatio testus ordinarii numerata.
TRACEABILITAS ET SYSTEMA
- Systema gestionis qualitatis ISO 9001.
- Tractabilitas numeri serialis a pane finito retro ad interruptorem vacuum, mechanismum et partem isolantem batch.
- Registra testuum retinentur et recuperabilia sunt pro tempore garantis et ultra, quod magni momenti est cum utilitas quaestionem post annos in usu movet.
QUALIFICATIO AMBIENTALIS
Normales gradus IEC supponunt ambientem +40 °C. Ubi destinatio magis exigit, nos verificamus secundum: experimentum incrementi temperaturae in ambiente elevato pro projectis in Golfo, experimentum pulveris salis pro installationibus littoralibus, et versiones climaticae GOST 15150 cum verificatione functionis ad temperaturas infimas pro deploymento in CIS.
