High-Performance JDZ(X)(9,10)-3, 6, 10 Type Voltage Transformers - China Suppliers & Factory
- Voltage Transformation and Measurement: Precisely steps down high system voltages to standardized, safe low voltages for accurate metering by connected instruments.
- Electrical Isolation and Protection: Provides essential galvanic isolation between the high-voltage primary circuit and low-voltage secondary control/protection circuits, safeguarding personnel and equipment.
- Signal Provision for Relays: Delivers reliable voltage signals to protective relays and control systems, enabling functions like over-voltage/under-voltage protection, synchronization, and system monitoring.
- Power Supply for Ancillary Devices: Capable of supplying short-term power (300VA to 1000VA) to connected devices within its rated specifications during normal and transient conditions.
- Primary Installation: Designed specifically for indoor use within enclosed electrical switchgear such as metal-clad switchgear, ring main units (RMUs), compact substations, and distribution cabinets.
- System Voltage Level: Ideal for medium-voltage distribution networks, commonly applied in systems with rated voltages of 3kV, 6kV, and 10kV.
- Setting Requirements: Must be installed in a clean, dry, and well-ventilated environment to maintain its epoxy resin insulation integrity. It is not suitable for outdoor or harsh environments with excessive moisture, pollution, or corrosive substances.
Offers excellent measurement accuracy with a 0.2 accuracy class for metering (15VA) and a protection class 3 rating (300VA), making it versatile for both precision measurement and robust protection circuit applications.
Features a full cast epoxy resin construction providing exceptional mechanical strength, moisture resistance, and partial discharge resistance. Its high insulation level (12/42/75 kV) ensures long-term reliability and safety.
Engineered with a high short-term thermal output capacity (up to 1000VA), allowing it to withstand significant overloads during fault conditions or switching events without damage.
Manufactured in strict compliance with the GB/T 20840.3-2013 standard, guaranteeing international-grade performance, interoperability, and consistent quality.
The JDZ(X) series designation indicates variants (like models 9 or 10) for different applications, available for common system voltages (3, 6, 10kV), providing tailored solutions for various project needs.
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Q: What voltage levels is the JDZ(X) series voltage transformer suitable for?
The JDZ(X) series is designed for medium-voltage distribution networks with rated system voltages of 3kV, 6kV, and 10kV, making it a standard choice for most urban and industrial distribution applications. -
Q: Can the JDZ(X) voltage transformer be used outdoors?
No. This transformer is specifically designed for indoor installation only. It must be placed in a clean, dry, and well-ventilated environment. Outdoor, high-humidity, or corrosive environments are not suitable and may compromise insulation integrity. -
Q: What is the accuracy class of the JDZ(X) metering winding?
The metering winding achieves a 0.2 accuracy class with a 15VA burden, which is suitable for high-precision energy metering applications. The protection winding is rated at class 3 with a 300VA burden. -
Q: What insulation material is used, and why does it matter?
The transformer uses a full cast epoxy resin construction. This provides excellent mechanical strength, superior moisture and partial discharge resistance, and a high insulation level of 12/42/75 kV — ensuring long-term operational safety and reliability. -
Q: Which standard does the JDZ(X) series comply with?
The JDZ(X) series is manufactured in strict compliance with the Chinese national standard GB/T 20840.3-2013, which aligns with international performance benchmarks for instrument transformers, ensuring consistent quality and interoperability. -
Q: What types of switchgear is the JDZ(X) transformer compatible with?
It is compatible with a wide range of indoor enclosed switchgear, including metal-clad switchgear, ring main units (RMUs), compact substations, and distribution cabinets — making it a highly versatile solution for medium-voltage distribution infrastructure.