Overview
The JDZX15-3/6/10R is a single-phase, indoor dry-type voltage transformer with epoxy cast-resin insulation, designed for 3kV, 6kV, and 10kV AC power systems. It features a built-in primary fuse and provides standardized secondary voltage outputs for metering, protection, and monitoring functions.
This transformer complies with IEC 61869 standards and offers accuracy classes suitable for both metering (e.g., 0.2, 0.5) and protection (3P, 6P) applications. It is intended for installation in enclosed indoor switchgear compartments where compact size, fire-safe insulation, and integrated fuse protection are required.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 3kV / 6kV / 10kV |
| Primary Voltage | 3 / √3 kV, 6 / √3 kV, 10 / √3 kV |
| Secondary Voltage (Main) | 100 / √3 V |
| Secondary Voltage (Residual) | 100 V |
| Accuracy Class (Metering) | 0.2, 0.5 |
| Accuracy Class (Protection) | 3P, 6P |
| Rated Output (per winding) | 10–100 VA (varies by class) |
| Insulation Material | Epoxy cast-resin |
| Primary Fuse | Built-in, rated per system voltage |
| Frequency | 50 Hz or 60 Hz |
| Phase | Single-phase |
| Indoor/Outdoor | Indoor use only |
Model Designation
- J: Voltage transformer
- D: Single-phase structure
- Z: Epoxy cast-resin insulation
- X: Residual-voltage / grounding-related winding
- 15: Design series code
- 3 / 6 / 10: Rated voltage class (3kV, 6kV, or 10kV)
- R: Fuse-equipped variant
Construction
The JDZX15-3/6/10R is constructed as a dry-type, epoxy cast-resin insulated voltage transformer. The core and windings are fully encapsulated in flame-retardant epoxy resin under vacuum pressure, providing excellent dielectric strength, moisture resistance, and mechanical stability. The primary winding includes an integrated high-voltage fuse mounted within the resin body, offering overcurrent protection without external components. The design eliminates oil or gas fillings, making it suitable for clean, confined indoor environments such as metal-enclosed switchgear. Terminals are accessible via standard bolted connections on the top or side, depending on mounting orientation, and the unit is designed for fixed, vertical installation in instrument compartments.
Technical Parameters
Service Conditions
- Ambient temperature: -5°C to +40°C
- Installation environment: Indoor
Technical Parameters
The JDZX15-3/6/10R is an indoor epoxy cast-resin voltage transformer with integrated fuse, designed for 3kV, 6kV, and 10kV systems. It operates at 50Hz or 60Hz within an ambient temperature range of -5°C to +40°C and complies with GB20840.3-2013 and IEC61869-3:2011 standards.
| Type | Voltage Ratio(kV) |
Rated insulation(kV) |
Accuracy class / Rated output (VA) |
Max. output(VA) |
Fuse within once(A) |
|---|---|---|---|---|---|
| JDZX15-3R | 3000/√3 : 100/√3 : 100/3 | 3.6/23/40 | 0.2/6P(3P)—25/100 | 0.5 | |
| JDZX10-10R | 6000/√3 : 100/√3 : 100/3 | 7.2/32/60 | 0.5/6P(3P)—50/100 | 400 | |
| 1/6P(3P)—90/100 | |||||
| 3/6P(3P)—200/100 | |||||
| JDZX15-10R | 10000/√3 : 100/√3 : 100/3 | 12/42/75 | 0.2/0.2/6P(3P)—15/15/100 | 200/200 | 0.2 |
| 10000/√3 : 100/√3 : 100/√3 : 100/√3 | 0.2/0.5/6P(3P)—15/20/100 | ||||
| 0.5/0.5/6P(3P)—30/30/100 |
Installation & Wiring
Installation Diagram
The JDZX15-3/6/10R series should be installed according to the approved outline drawing, switchgear layout, and this installation diagram. The unit features a base-mounted cast-resin structure and must be firmly fixed to the cabinet base or mounting plate using the provided mounting reference length of 280 mm.
Wiring Diagram
Primary and secondary wiring must follow the approved wiring diagram. Residual-voltage winding terminals should be connected in accordance with the specified protection scheme. Secondary terminal markings must be verified before commissioning. Confirm that the built-in fuse rating matches the selected model and project requirements.
Selection & FAQs
Selection Guide
- Select JDZX15-3R for 3kV systems, JDZX15-6R for 6kV systems, and JDZX15-10R for 10kV systems based on your system voltage.
- Choose metering accuracy classes (0.2 or 0.5) for measurement applications and protection classes (3P or 6P) for relay or residual-voltage circuits.
- Ensure the rated secondary output exceeds the total connected burden of all downstream devices including meters, relays, and wiring.
- Confirm that the built-in fuse rating and configuration align with your switchgear protection scheme and primary circuit requirements.
- Verify installation dimensions—such as overall length, base width, height, terminal box position, and fuse clearance—against your switchgear layout to allow space for wiring, inspection, and maintenance.
Frequently Asked Questions
Q1: Can the JDZX15-10R be used in 6kV switchgear?
Yes, subject to project confirmation. The JDZX15-10R is rated for 10kV systems with a 12/42/75kV insulation level, making it suitable for lower voltage applications. Contact us to verify specific ratio requirements.
Q2: Which accuracy class is available for the 10kV model?
The JDZX15-10R offers 0.2, 0.5, and 3 accuracy classes with rated outputs up to 200VA. Select the 0.2 class for precision metering or 0.5 for general panel measurements. Factory calibration is available upon request.
Q3: What are the ambient temperature limits for indoor installation?
The transformer operates safely between -5°C and +40°C. It is strictly designed for indoor environments and must not be exposed to outdoor weather conditions. Proper climate control ensures optimal epoxy resin lifespan.
Q4: What international standards does this epoxy cast-resin transformer comply with?
It fully complies with IEC61869-3:2011 and GB20840.3-2013 standards. These certifications ensure reliable performance for 50Hz and 60Hz power systems. Request the official test certificates during your procurement inquiry.
Q5: Are integrated fuses included in the standard JDZX15-3R configuration?
Yes, the JDZX15-3R includes an integrated 0.5A primary fuse for enhanced protection. The JDZX15-10R also features a 0.2A fuse. Contact our sales team to confirm specific fuse ratings for your project.
Q6: How is this voltage transformer manufactured for indoor switchgear?
It is constructed using premium epoxy cast-resin for superior insulation and durability. This manufacturing process ensures a compact, maintenance-free design ideal for indoor medium-voltage switchgear. Request detailed dimensional drawings for integration planning.