Overview
The JDZ10-3/6/10A/160 (RZL10) is an indoor epoxy cast-resin voltage transformer designed for medium-voltage switchgear applications in 50Hz or 60Hz AC systems. It accurately converts line voltage from 3kV, 6kV, or 10kV down to standardized secondary outputs such as 0.1kV, dual 0.1/0.1kV, or 0.22kV for use in metering, monitoring, protection, and auxiliary circuits.
This compact RZL10-style unit features a 160mm structure with reduced weight and cabinet footprint compared to larger variants. It is ideal for projects requiring space-efficient line-voltage transformation without compromising performance or reliability in indoor environments.
Key Ratings Snapshot
| Parameter | Value |
|---|---|
| System Voltage | 3kV / 6kV / 10kV |
| Insulation Class | 3.6kV / 7.2kV / 12kV |
| Frequency | 50Hz / 60Hz |
| Voltage Ratios | 3/0.1kV, 6/0.1kV, 10/0.1kV; 3/0.1/0.1kV; 6/0.22kV; 10/0.22kV |
| Max Output | 400VA (single sec), 350VA (dual/aux) |
| Accuracy Classes | 0.2, 0.5, 1.0, 3.0 |
| Ambient Temp | -25 deg C to +40 deg C |
| Installation Type | Indoor switchgear |
| Insulation | Epoxy cast-resin |
| Weight | 21.76kg |
Model Designation
- J: Voltage transformer
- D: Single-phase structure
- Z: Epoxy cast-resin insulation
- 10: Design series code
- 3 / 6 / 10: Rated system voltage (kV)
- A: Compact configuration
- 160: RZL10-style outline size
Construction
The JDZ10-3/6/10A/160 series features a monolithic epoxy cast-resin body that fully encapsulates primary and secondary windings, providing excellent mechanical strength, moisture resistance, and long-term dielectric stability. The compact design is optimized for line-voltage applications, supporting secondary outputs of 0.1kV for metering, 0.1/0.1kV for dual isolated circuits, and 0.22kV for cabinet auxiliary power.
All terminals are accessible via a front-mounted terminal box, and the base conforms to the RZL10 standard for seamless integration into compact indoor switchgear. The unit is not intended for phase-to-ground or residual-voltage applications, which require grounded-type (e.g., JDZX) transformers.
Technical Parameters
Service Conditions
- Installation Location: Indoor air-insulated switchgear or protected cabinet
- Ambient Temperature: -25 deg C to +40 deg C
- System Frequency: 50Hz / 60Hz
- Relative Humidity: <=95% (non-condensing)
- Altitude: <=1000m above sea level
Technical Data
| Model | Rated Voltage Ratio |
Accuracy Class / Rated Output |
Max. Output |
Rated Insulation Level (kV) |
|---|---|---|---|---|
| JDZ10-3A/160 | 3 / 0.1kV | 0.2:20VA 0.5:50VA 1.0:100VA 3.0:200VA |
400VA | 3.6/25/40 |
| JDZ10-6A/160 | 6 / 0.1kV | 0.2:20VA 0.5:50VA 1.0:100VA 3.0:200VA |
400VA | 7.2/30/60 |
| JDZ10-10A/160 | 10 / 0.1kV | 0.2:20VA 0.5:50VA 1.0:100VA 3.0:200VA |
400VA | 12/42/75 |
| JDZ10-3A/160 | 3 / 0.1 / 0.1kV | 0.2/0.2:10/10VA 0.2/0.5:10/10VA |
350VA | 3.6/25/40 |
| JDZ10-6A/160 | 6 / 0.1 / 0.1kV | 0.2/0.2:10/10VA 0.2/0.5:10/10VA |
350VA | 7.2/30/60 |
| JDZ10-10A/160 | 10 / 0.1 / 0.1kV | 0.2/0.2:10/10VA 0.2/0.5:10/10VA |
350VA | 12/42/75 |
| JDZ10-3A/160 | 3 / 0.22kV | 3.0:80VA | 350VA | 3.6/25/40 |
| JDZ10-6A/160 | 6 / 0.22kV | 3.0:80VA | 350VA | 7.2/30/60 |
| JDZ10-10A/160 | 10 / 0.22kV | 3.0:80VA | 350VA | 12/42/75 |
Installation & Wiring
Installation Diagram
The transformer mounts directly onto the base plate of indoor switchgear using standard M8 bolts. Primary terminals (A and B) connect across phases for line-voltage measurement. Secondary wiring connects to the front terminal box, labeled according to configuration (e.g., a/b, 1a/1b, or auxiliary terminals). Ensure adequate phase-to-phase clearance and grounding before energizing.
Outline Dimensions
| Item | Reference Value |
|---|---|
| Overall base length | 330 +/-2mm |
| Main mounting length | 300 +/-2mm |
| Body mounting length | 270 +/-1.5mm |
| Base width | 160 +/-1mm |
| Overall height | 230 +/-2mm |
| Body height reference | 216mm |
| Top terminal spacing | 102mm reference |
| Primary terminal bolt | 2-M8 reference |
| Grounding bolt | M8 reference |
| Approximate weight | 21.76kg |
Selection & FAQs
Selection Guide
- Select JDZ10-3A/160, -6A/160, or -10A/160 based on 3kV, 6kV, or 10kV system voltage (use 3.6kV/7.2kV/12kV class terms for international projects).
- Choose the 160 structure when cabinet space is limitedâit is more compact and lighter (~21.76kg) than 180mm alternatives.
- Use 0.1kV secondary for standard metering and monitoring; 0.1/0.1kV for two independent secondary circuits.
- Select 0.22kV output only for auxiliary cabinet power needsâconfirm load and burden during specification.
- Maximum output is 400VA for single-secondary models and 350VA for dual or auxiliary configurations.
Frequently Asked Questions
Q1: Can this JDZ10-10A transformer be installed outdoors?
No, this epoxy cast resin voltage transformer is strictly designed for indoor installation. It must be mounted in air-insulated switchgear or a protected cabinet. Contact our sales team for outdoor-rated alternatives.
Q2: Which accuracy class is suitable for protection relays?
Select the 3.0 accuracy class for protection applications. It provides a rated output of 200VA to ensure reliable relay operation. Confirm your specific burden requirements with our engineering team.
Q3: What is the maximum operating altitude for this 10kV VT?
The maximum rated altitude is 1000 meters above sea level. For installations exceeding this elevation, derating or special design modifications are required. Please specify your site altitude during inquiry.
Q4: What factory tests are performed before shipment?
Standard routine tests include insulation resistance, voltage ratio, and induced voltage withstand tests. Full type test reports are available upon request. Specify your required test standards when placing an order.
Q5: Can the voltage ratio be customized for specific projects?
Yes, custom voltage ratios and accuracy combinations are available subject to factory confirmation. Standard models like the 10/0.1kV ratio are kept in stock. Contact our procurement department for customized lead times.
Q6: Is this RZL-10 model suitable for 60Hz power systems?
Yes, the JDZ10 series supports both 50Hz and 60Hz system frequencies. It is widely used in indoor switchgear for voltage measurement and protection. Confirm your system frequency to ensure correct core design.
Q7: How do dual secondary windings benefit metering setups?
Dual secondary windings allow simultaneous connection to metering and protection circuits. The JDZ10-10A provides separate 0.1kV outputs with distinct accuracy classes like 0.2 and 3.0. Request a wiring diagram from our technical support.