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: Is the JDZ6-1 suitable for outdoor installation environments?
No, it is strictly designed for indoor use. It requires an environment free from severe dust, corrosive gases, and explosive media. Contact us for outdoor transformer options.
Q2: What is the maximum rated output for 0.5 accuracy class?
The rated output for the 0.5 accuracy class is 15 VA. This applies to all standard voltage ratios including 220/100V, 380/100V, and 500/100V.
Q3: Which voltage ratios are available for this epoxy resin transformer?
Standard ratios include 220/100V, 380/100V, and 500/100V at 50Hz. For special voltage ratios or specific output requirements, a technical agreement must be confirmed prior to ordering.
Q4: How can we request custom accuracy requirements for bulk orders?
Custom accuracy classes and specific output ratings require a prior technical agreement. Please submit your detailed specifications to our engineering team for factory confirmation and quotation.
Q5: Are special frequency or output ratings available for this model?
Standard models operate at 50Hz with defined VA outputs. Any special frequency, voltage ratios, or output ratings must be confirmed via a technical agreement before placing your order.
Q6: Where is this indoor epoxy resin potential transformer typically applied?
It is designed for voltage measurement and protection in indoor 50Hz electrical systems up to 500V. It is commonly used in indoor switchgear and control panels.
Q7: When does altitude require special design modifications for installation?
The standard design is rated for altitudes up to 1000 meters. For installations exceeding this altitude, special design considerations are required and subject to factory confirmation.