JDZX(F)9-10 Voltage Transformer
Produktübersicht
Der JDZX (F) 9-10 Spannungstransformator ist ein vollständig gekapselter, in Epoxidharz vergossener Trocken-Spannungswandler, der für 10kV (Um=12kV) Innenraum-Wechselstromsysteme konzipiert ist. Er verfügt über eine integrierte Restspannungswicklung (die F-Variante fungiert auch als Entlastungsspule) und zeichnet sich durch hervorragende Isolationseigenschaften, starke Verschmutzungs-Überschlagfestigkeit und zuverlässigen Betrieb aus. Er wird hauptsächlich in 10kV-Mittelspannungs-Innenräumen eingesetzt switchgear für Spannungsmessung, Energiemessung, Relaischutz und Isolationsüberwachung. Der F-Typ bietet zusätzlich die Funktion zur Entladung von Kondensatorbänken. Der Transformator wird häufig in 10-kV-Verteilungsnetzen, vorgefertigten Umspannwerken, Ringkabelschaltanlagen und Blindleistungskompensationsgeräten eingesetzt.
Hauptproduktmerkmale
Isolierung und elektrische Leistung
Fully-enclosed epoxy resin cast insulation: The unit is integrally formed by vacuum epoxy resin casting with no internal voids, providing excellent insulation performance. It withstands the 12kV system operating voltage and passes power-frequency and impulse withstand voltage tests. Partial discharge level is ≤10pC. Long-term operation is free from insulation aging risks, leakage, and oil contamination, making it suitable for oil-free indoor distribution applications.
Residual voltage winding design: An integrated residual voltage winding provides 100/3V output for insulation monitoring of ground faults, compatible with three-phase, five-limb voltage transformer wiring configurations to meet insulation monitoring requirements of non-effectively grounded neutral systems.
Wide voltage ratio compatibility: Supports standard voltage ratios (e.g., 10/0.1/0.1/3kV). Metering accuracy can reach Class 0.2; protection class can be customized to 3P/6P, meeting the requirements of metering, protection, and insulation monitoring applications. The F-type simultaneously satisfies the electrical parameter requirements of capacitor bank discharge coils.
High anti-pollution-flashover performance: The high-voltage side employs an integrated shed-type insulation structure with a large creepage distance, providing excellent resistance to pollution flashover in contaminated environments and reducing the risk of surface tracking.
Strukturelle und Installationsmerkmale
Fully-enclosed dry-type construction: The integral cast structure has no exposed live parts, with a protection rating of IP20. The oil-free design eliminates fire hazards. The compact, low-profile form factor is compatible with standard switchgear installation dimensions.
Multi-function integrated design: The F-type integrates voltage transformer and discharge coil functions, simultaneously enabling voltage monitoring and residual charge dissipation from capacitor banks. This simplifies in-cabinet equipment configuration, reduces installation space, and lowers overall costs.
Clear terminal arrangement: Secondary terminals are protected by transparent covers with clear labeling, facilitating wiring and preventing misconnection and short circuits. Terminal layout conforms to in-cabinet secondary circuit wiring standards.
Flexible mounting: The base metal mounting plate is equipped with fixing holes for bolted installation, supporting horizontal in-cabinet indoor mounting. The assembly is mechanically rigid with excellent vibration resistance, enabling compact in-cabinet arrangement.
Betriebs- und Wartungsfunktionen
Maintenance-free operation: The dry, oil-free construction eliminates leakage and fire hazards. The high mechanical strength of the epoxy cast body provides impact and aging resistance for long-term maintenance-free operation, reducing operational costs. The F-type eliminates the need for a separate discharge coil, reducing maintenance points.
Wide operating temperature range: Designed for ambient temperatures from -30°C to +70°C. Epoxy resin properties remain stable across the full temperature range with no risk of embrittlement or deformation, suitable for varied regional climatic conditions.
High-reliability design: The iron core is constructed from high-grade silicon steel laminations, and windings are wound from enameled copper wire. Low operational losses and minimal heat generation ensure the unit withstands system switching overvoltages and lightning impulse overvoltages, guaranteeing reliable metering, protection, and insulation monitoring signals.
Technische Parameter (Typische Spezifikationen)
Anwendungen
Anwendbare Spannungsebene: 10kV (Um=12kV) Innenraum-Wechselstromsysteme.
Typische Anwendungsszenarien:
Spannungsmessung, Energiemessung und Relaisschutz in Innenraum-Mittelspannungsschaltanlagen und vorgefertigten Umspannwerken;
10kV-Verteilungsnetze in Umspannwerken, Industrie- und Bergbauunternehmen, Geschäftsgebäuden und Industrieparks;
Spannungsüberwachung, -steuerung und -schutzsignal erfassung in Energieautomatisierungssystemen;
Insulation monitoring in non-effectively grounded neutral systems, compatible with three-phase, five-limb wiring configurations;
F-type applicable to reactive power compensation devices for simultaneous voltage monitoring and capacitor bank discharge.
Functional purpose: Steps down high system voltage to a standard low voltage (100V) for supply to metering instruments, protection devices, and control equipment, while providing electrical isolation between the primary and secondary systems. The residual voltage winding monitors system ground faults for insulation supervision. The F-type additionally dissipates residual charge from capacitor banks to ensure maintenance safety.
Betriebsbedingungen
Normalbetriebsbedingungen
Höhe: ≤2000m;
Umgebungstemperatur: -30°C bis +70°C, ohne starke Temperaturschwankungen;
Relative Luftfeuchtigkeit: ≤95% (nicht kondensierend);
Environmental conditions: Free from corrosive gases, flammable or explosive media, severe vibration and shock, and significant dust or salt mist;
Installation: Montage auf einem Innenpfosten, geschützt vor direkter Sonneneinstrahlung, Regen und Kondensation.
Spezielle Betriebsbedingungen (Anpassung erforderlich)
Höhe über 2000 m;
Umgebungstemperatur außerhalb des Bereichs von -30 °C bis +70 °C;
Stark verschmutzte, salznebelhaltige oder chemisch korrosive Umgebungen;
Betriebsbedingungen mit hoher Vibration oder hohen Stößen;
Nicht standardmäßige Übersetzungsverhältnisse, Genauigkeitsklassen oder Einbaumaße.
Installation und Wartung
Installationsanforderungen
Pre-installation inspection: Inspect the voltage transformer for external defects — the cast body must be free from cracks, voids, and damage; terminals must be clearly labeled and all accessories present. Verify that the model, rating, voltage ratio, and accuracy class match design requirements. For F-type units, confirm that discharge function parameters comply with reactive power compensation device requirements.
Mounting and fixing: Position the voltage transformer in the designated location within the switchgear cabinet and secure it through the base mounting holes with bolts, ensuring firm installation with no looseness or misalignment. The mounting surface must be level to prevent eccentric loading.
High-voltage side wiring: Connect high-voltage terminals per design requirements, ensuring tight connections and good contact. Maintain adequate safety clearance between high-voltage leads, grounded parts, and other live parts to prevent discharge. F-type units must be wired in accordance with discharge coil wiring requirements.
Low-voltage side wiring: Connect low-voltage terminals per labeling, with separate wiring for metering, protection, and residual voltage circuits. Verify correct wiring. Secondary circuits must never be short-circuited and must be reliably grounded (single-point grounding) to prevent overvoltage.
Insulation verification: After installation, measure insulation resistance (HV to LV and ground; LV to ground) to confirm compliance with insulation requirements. Verify that secondary circuit wiring is correct with no short circuits or open circuits. For F-type units, verify that the discharge function operates correctly.
Wartungsrichtlinien
Periodically inspect the external condition of the voltage transformer: the cast body must be free from cracks, damage, and discharge marks; high-voltage terminals must show no looseness or oxidation; secondary terminal protective covers must be intact.
Periodically inspect high-voltage and low-voltage connections for tightness with no signs of overheating or discoloration; verify that the low-voltage circuit ground is reliable with no short circuit or open circuit risk.
Periodically test insulation resistance and voltage ratio to confirm that metering and protection accuracy meets requirements; also verify proper operation of the residual voltage circuit and insulation monitoring function. For F-type units, periodically test discharge function parameters.
Clean dust and contamination from the transformer surface; prevent oil and corrosive substances from adhering; keep the equipment dry and clean.
If cracks, discharge, overheating, voltage ratio deviation, or functional failure are detected, de-energize immediately for inspection and replace the equipment if necessary. Continued operation with known defects is strictly prohibited.
Sicherheitsvorkehrungen
Secondary windings must never be short-circuited. A short circuit in the secondary circuit during operation will produce excessive current and endanger equipment and personnel. During maintenance, the secondary circuit must be reliably open-circuited and grounded.
During installation, avoid mechanical impact or collision with the cast body to prevent epoxy resin cracking and insulation damage, which would compromise insulation performance and anti-pollution-flashover capability.
High-voltage side wiring must use dedicated insulated leads, maintaining adequate safety clearance from grounded parts and other live parts to prevent phase-to-phase or phase-to-ground discharge. F-type unit wiring must simultaneously satisfy both voltage transformer and discharge coil wiring requirements.
Equipment grounding must be reliable; the base grounding terminal must be securely connected to the cabinet grounding busbar.
During storage, keep the unit in a dry, ventilated, cool environment, protected from direct sunlight, high temperatures, humidity, and mechanical compression to prevent aging or deformation of the cast body.
Installation, Inbetriebnahme und Wartung müssen von qualifiziertem Elektrofachpersonal unter strikter Einhaltung der elektrischen Sicherheitsbetriebsverfahren durchgeführt werden.
Standardlieferumfang
| Parameterkategorie | Artikel | Technische Spezifikation |
| Elektrische Parameter | Systemspannung | 10kV AC (Um=12kV) |
| Nennfrequenz | 50 Hz | |
| Nennspannung | 10kV | |
| Nenn-Sekundärspannung | 100V (Messung/Schutz), 100/3V (Restspannung/Isolationsüberwachung) | |
| Messgenauigkeitsklasse | 0.2 / 0.5 / 1 | |
| Schutzklasse | 3P / 6P | |
| | Spannungsfestigkeit bei Netzfrequenz (Hochspannungsanschluss) | 42kV / 1min, keine Durchschlag | |
| Stoßspannungsfestigkeit (Spitze) | 75kV, kein Durchschlag | |
| Teilentladungspegel | ≤10pC | |
| Isolationswiderstand (Hochspannung zu Niederspannung und Erde) | ≥1000MΩ | |
| Strukturelle und materielle Parameter | Isolierstoff | Vollverguss mit Epoxidharz |
| Schutzart | IP20 | |
| Montagemethode | Innenaufstellung mit Ständerverschraubung | |
| Thermische Isolationsklasse | Klasse B (130°C) | |
| Umweltparameter | Betriebshöhe | ≤2000m (Sonderanfertigung für große Höhen verfügbar) |
| Betriebsumgebungstemperatur | -30°C bis +70°C | |
| Lagertemperatur | -40°C bis +85°C | |
| Relative Luftfeuchtigkeit | ≤95% (nicht kondensierend) | |
| Anwendbare Normen | Nationale Standards | GB 1207 Voltage Transformers; GB/T 20840 series; DL/T 653 Technical Conditions for Ordering Discharge Coils for Shunt Capacitors (F-type) |
Standards und Zertifizierungen
The product complies with GB 1207 Voltage Transformers, GB/T 20840.1 Instrument Transformers — Part 1: General Requirements, GB/T 20840.3 Instrument Transformers — Part 3: Additional Requirements for Inductive Voltage Transformers, and other applicable national standards. The F-type additionally complies with DL/T 653 Technical Conditions for Ordering Discharge Coils for Shunt Capacitors. The product has passed type tests and meets the operational requirements of 10kV indoor power systems.
Anhang: Produktübersichtzeichnung
Standardkonfiguration
| Nein. | Name | Zweck |
|---|---|---|
| 1 | JDZX (F) 9-10 Spannungswandler | Kernmodul, das Spannungsübertragung / Isolation / Isolierung (F-Entladung) bereitstellt |
| 2 | Befestigungsschrauben / Unterlegscheiben | SpannungswandlerFestinstallation |
| 3 | Sekundäres Anschluss-Schutzgehäuse | Schutzanschluss, Verhindern von falscher Verbindung / Kurzschluss |
| 4 | Bedienungsanleitung | Installations- / Betriebs- / Wartungsanleitung, F Entladung |
| 5 | Produktschein und Werksprüfbericht | Qualitätsleistungszertifizierungsdokument, Übersetzungsverhältnis / Fehler / Entladung (F) Testdaten |
Bestellinformationen
Bestätigen Sie vor der Bestellung die anwendbare Systemspannung, die Genauigkeitsklasse des Messgeräts, die Genauigkeitsklasse des Schutzes, die Einbaumethode, den Schutzgrad und die erforderliche Menge gemäß den Projektzeichnungen und der Quellenspezifikation.
