Overview
The JSZFW-10RW3 is an outdoor cast-resin three-phase anti-ferroresonance voltage transformer designed for 3kV, 6kV, and 10kV medium-voltage systems. It features epoxy resin cast insulation and integrated anti-ferroresonance technology to suppress dangerous overvoltages caused by ferroresonance phenomena in power networks.
This transformer provides accurate three-phase voltage measurement for protection and metering, with accuracy classes of 0.2, 0.5, 1, and 3. It supports single or double secondary windings and meets standard requirements for outdoor operation in harsh environments, including high humidity, pollution, and UV exposure. Its insulation level is rated at 12/42/75kV (power frequency/lightning impulse).
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 3kV / 6kV / 10kV |
| Insulation Level | 12/42/75kV |
| Accuracy Classes | 0.2, 0.5, 1, 3 |
| Secondary Windings | Single or double |
| Phase Configuration | Three-phase |
| Anti-Ferroresonance | Yes |
| Insulation Material | Epoxy resin cast |
| Installation Type | Outdoor |
| Maintenance Requirement | Maintenance-free |
| Application | Protection, metering, power quality |
| Max System Voltage | 12kV |
| Core Design | Ferroresonance-suppressing |
Construction
The JSZFW-10RW3 features a robust epoxy resin cast construction that fully encapsulates the magnetic core and windings. This solid insulation provides excellent dielectric strength, moisture resistance, and long-term stability under outdoor conditions. The anti-ferroresonance design incorporates a specially engineered magnetic circuit that prevents nonlinear resonance between system capacitance and transformer inductance. All external surfaces are UV-resistant and suitable for continuous outdoor exposure without degradation. The unit requires no maintenance during its service life and is designed for direct mounting on outdoor switchgear or support structures.
Technical Parameters
Service Conditions
- Installation position: Outdoor switchgear, substations, or distribution points
- Ambient temperature: -5°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Epoxy resin cast
- Frequency: 50Hz or 60Hz
- Connection: Three-phase with anti-ferroresonance design
- Maintenance: Minimal maintenance required (epoxy resin design)
Technical Parameters
The JSZFW-10RW3 is an outdoor cast-resin three-phase anti-ferroresonance voltage transformer designed for 3kV, 6kV, and 10kV systems. It features epoxy resin insulation, operates within -5°C to +40°C ambient temperature, and is suitable for altitudes up to 1000m (higher on request). The unit complies with GB20840.3-2013 and IEC61869-3:2011 standards.
| Rated voltage
ratio(V) |
Tri-phase rated
output(VA) |
Limit output
(VA) |
Rated insulated
level(kV) |
|||
|---|---|---|---|---|---|---|
| 0.2 | 0.5 | 1 | 3 | |||
| 3000/√3 : 100/√3 : 100/√3 | 60 | 120 | 240 | 600 | 1200 | 3.6/23/40 |
| 6000/√3 : 100/√3 : 100/√3 | 60 | 120 | 240 | 600 | 1200 | 7.2/32/60 |
| 10000/√3 : 100/√3 : 100/√3 | 60 | 120 | 240 | 600 | 1200 | 12/42/75 |
| 3000/√3 : 100/√3 : 100/√3 : 100/√3 | 45/45 | 60/60 | / | / | 600/600 | 3.6/23/40 |
| 6000/√3 : 100/√3 : 100/√3 : 100/√3 | 45/45 | 60/60 | / | / | 600/600 | 7.2/32/60 |
| 10000/√3 : 100/√3 : 100/√3 : 100/√3 | 45/45 | 60/60 | / | / | 600/600 | 12/42/75 |
Installation & Wiring
Installation Diagram
The JSZFW-10RW3 is designed for outdoor installation on switchgear or substation structures. Mounting is achieved via the base dimensions (590mm width) with appropriate hardware to ensure stability and alignment. Adequate clearance must be maintained around the unit for ventilation and safe access during maintenance.
Wiring Diagram
Primary terminals A, B, and C connect to the three-phase system lines. The neutral terminal N must be solidly grounded to the system earth. Secondary terminals, located in the terminal box on the side of the unit, are connected to metering and protection devices as per system requirements. All secondary circuits must be properly grounded to prevent hazardous voltage build-up.
Selection & FAQs
Selection Guide
- Select by system voltage: Choose JSZFW-10RW3 for 3kV, 6kV, or 10kV systems with appropriate insulation level.
- Select by accuracy class: Use 0.2 for high-precision metering, 0.5 for standard metering, 1 for general measurement, or 3 for indication purposes.
- Select by winding configuration: Choose single winding for basic applications or double winding for enhanced system flexibility.
- Select by rated output: Choose a rated output between 60-600VA based on your connected burden requirements.
- Confirm frequency: Specify 50Hz or 60Hz to match your power system requirements.
- Verify installation environment: The JSZFW-10RW3 is designed specifically for outdoor use.
Frequently Asked Questions
Q1: What is the primary application for this outdoor voltage transformer?
It is designed for 3kV, 6kV, and 10kV outdoor switchgear and substations. The three-phase anti-ferroresonance design prevents system instability. Contact us to verify suitability for your specific grid configuration.
Q2: Can this cast-resin transformer operate in high-altitude environments?
The standard model supports altitudes up to 1000m. For installations above this level, customized high-altitude designs are available upon request. Please specify your exact site altitude during inquiry.
Q3: Which accuracy class outputs are available for this 10kV transformer?
It provides 0.2, 0.5, 1, and 3 class secondary windings. The 0.2 class delivers 60VA, while the 3 class provides up to 600VA. The appropriate class depends on your specific metering requirements.
Q4: What international standards does this outdoor voltage transformer comply with?
The JSZFW-10RW3 fully complies with GB20840.3-2013 and IEC61869-3:2011 standards. We provide standard factory test reports with every shipment. Request specific certification documents from our sales team if required.
Q5: How is the epoxy resin insulation tested before shipment?
Standard routine tests include insulation resistance and voltage ratio verification. Specific dielectric or partial discharge tests are subject to project confirmation. Contact our engineering team for detailed test protocols.
Q6: Why choose an epoxy cast-resin design for outdoor switchgear?
Epoxy resin provides excellent weather resistance and requires minimal maintenance compared to oil-filled units. It ensures reliable operation in ambient temperatures from -5°C to +40°C. This design significantly reduces lifecycle operational costs.
Q7: Can this three-phase anti-ferroresonance transformer be used in 60Hz systems?
Yes, the JSZFW-10RW3 is designed for both 50Hz and 60Hz power grids. Ensure your system frequency matches the nameplate rating during order placement. Contact sales for 60Hz specific technical data.