Overview
The JDZ6-1 indoor dry-type potential transformer is an epoxy resin insulated voltage transformer designed for indoor AC power systems operating at 50Hz. It accurately converts primary system voltages into a standardized 100V secondary signal for use with measuring instruments, energy meters, and relay protection devices. Its compact, oil-free design ensures safe and reliable operation in confined indoor environments such as switchgear, metering panels, and distribution cabinets.
Built with a C-shaped cold-rolled silicon steel core and fully cast-resin insulation, the JDZ6-1 delivers stable dielectric performance, mechanical robustness, and moisture resistance. Secondary terminals are conveniently accessible for wiring, supporting straightforward integration into low-voltage monitoring and protection circuits.
Key Ratings Snapshot
| Parameter | Value |
|---|---|
| Rated frequency | 50 Hz |
| Primary voltage options | 220 V, 380 V, 500 V |
| Secondary voltage | 100 V |
| Voltage ratios | 220/100 V, 380/100 V, 500/100 V |
| Accuracy classes | 0.5, 1, 3 |
| Rated output (VA) | 15 VA (0.5), 25 VA (1), 50 VA (3) |
| Limit output | 100 VA |
| Insulation type | Epoxy resin (cast-resin) |
| Core structure | C-shaped cold-rolled silicon steel |
| Installation location | Indoor only |
Model Designation
- J: Voltage transformer / potential transformer
- D: Indoor use
- Z: Casting resin insulated structure
- 6: Voltage grade / design category code
- 1: Design number
Construction
The JDZ6-1 features a dry-type, epoxy resin encapsulated construction that eliminates the need for oil insulation, making it ideal for indoor installations where fire safety and space constraints are critical. The entire magnetic assemblyâincluding the C-core made from high-permeability cold-rolled silicon steelâis fully embedded in cast resin, providing excellent electrical insulation, mechanical strength, and resistance to humidity and contaminants.
All primary (A, X) and secondary (a, x) terminals are routed to a dedicated connection pedestal on the base, enabling secure and organized wiring. The robust housing ensures long-term stability under continuous operation while maintaining compliance with standard indoor environmental conditions.
Technical Parameters
Service Conditions
- Installation location: Indoor
- Altitude: <= 1000 m (unless specified otherwise)
- Ambient temperature: -5 deg C to +40 deg C
- 24-hour avg. relative humidity: <= 95%
- Monthly avg. relative humidity: <= 90%
- Environment: Free from severe dust, smoke, corrosive gases, steam, salt, explosive media, and strong vibration
Technical Data
| Rated Voltage Ratio (V) |
Rated Frequency (Hz) |
Rated Output 0.5 Class (VA) |
Rated Output 1 Class (VA) |
Rated Output 3 Class (VA) |
Limit Output (VA) |
|---|---|---|---|---|---|
| 220/100 | 50 | 15 | 25 | 50 | 100 |
| 380/100 | 50 | 15 | 25 | 50 | 100 |
| 500/100 | 50 | 15 | 25 | 50 | 100 |
Installation & Wiring
Installation Diagram
The JDZ6-1 is designed for fixed indoor mounting in switchgear, metering cabinets, or control panels. Primary and secondary terminals are clearly marked (A/X and a/x) and located on the base for easy access. Ensure correct polarity during wiring and verify grounding per local electrical codes.
Outline Dimensions
| Item | Reference Description |
|---|---|
| Product structure | Indoor dry-type epoxy resin insulated potential transformer |
| Core structure | C-shaped cold-rolled silicon steel core |
| Installation method | Indoor fixed installation |
| Primary terminal marking | A and X |
| Secondary terminal marking | a and x |
| Outline dimensions | Refer to approved drawing before cabinet layout |
Selection & FAQs
Selection Guide
- Choose the exact 220/100V, 380/100V or 500/100V ratio. Confirm whether the VT connects across phases or from phase to neutral in the intended circuit.
- Select 0.5, 1 or 3 accuracy by application. Keep the total secondary burden within 15VA, 25VA or 50VA respectively.
- Use the 100VA limit only as a thermal reference. Do not expect the selected accuracy class to remain valid at limiting output.
- Confirm insulation before treating it as a “1kV” product. The page does not provide a complete rated insulation/withstand value, and the model suffix should not be used as proof.
- Check retrofit and protection details. Verify dimensions, base holes, A/X-a/x polarity, primary and secondary fuses, grounding, ventilation and any special ratio by technical agreement.
Frequently Asked Questions
Q1: Can this potential transformer handle 380V primary systems?
Yes, the JDZ6-1 supports 380/100V ratios at 50Hz. It provides up to 50VA output at accuracy class 3. Confirm specific ratio requirements with our engineering team.
Q2: What are the environmental limits for indoor installation?
This transformer operates safely within specified indoor limits. Ambient temperatures must remain between -5°C and +40°C, with humidity up to 95%. Ensure the area is free from corrosive gases.
Q3: Which accuracy class offers the highest burden capacity?
Class 3 provides the highest standard burden at 50VA, while the absolute limit output is 100VA. Verify your specific burden needs prior to ordering.
Q4: How to order custom voltage ratios for this transformer?
Special voltage ratios and output ratings require a prior technical agreement. Contact our sales team to discuss your custom specifications and lead times.
Q5: What routine factory tests are performed before shipment?
Routine factory testing procedures are subject to confirmation based on your specific project requirements. Please contact our procurement team for detailed test reports and documentation.
Q6: Where is the JDZ6-1 epoxy resin transformer typically applied?
The JDZ6-1 is designed for indoor voltage measurement in low-voltage distribution networks up to 500V. It serves relay protection and metering applications. Confirm specific application details with our technical team.