
Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.
JSZV12A-3/6/10 Indoor Three-Phase Voltage Transformer: 3kV/6kV/10kV, indoor three-phase epoxy resin casting, 3000/100, 6000/100, 10000/100 phase-to-phase ratio, dual secondary winding, 0.2/0.5/1/3 accuracy class, 3.6-12/23-42/40-75kV insulation, 600×√3 VA ultra-high output, compact integrated design, 50-60Hz, GB1207 IEC60044-2.
Advanced JSZV12A indoor three-phase voltage transformer featuring epoxy resin casting, conforming to GB1207 and IEC60044-2 standards, three voltage levels (3kV, 6kV, 10kV), rated insulation levels 3.6/23/40kV, 7.2/32/60kV, and 12/42/75kV, rated frequency 50Hz or 60Hz, designed for indoor three-phase power systems with phase-to-phase voltage measurement, exceptional 600×√3 VA ultra-high output capacity per three-phase unit supports extensive multiple load connections.
Superior compact three-phase integrated design with 3000/100, 6000/100, or 10000/100 phase-to-phase voltage ratios reduces indoor installation space versus three separate single-phase units, dual secondary winding configurations available for independent metering applications, special 10000/100/220 configuration provides 100V three-phase plus 220V single-phase outputs, suitable for indoor substations, indoor switchgear, and metal-clad equipment requiring reliable high-capacity three-phase voltage measurement.

| JSZV12A-3/6/10 Indoor Three-Phase Voltage Transformer Specifications | Parameter | Unit |
|---|---|---|
| Brand | Bepto Insulation Systems | – |
| Model Number | JSZV12A-3/6/10 Series (JSZV12A-3, JSZV12A-6, JSZV12A-10) | – |
| Category | Switchgear & HV PT (High Voltage Potential Transformer) | – |
| Product Type | 3kV/6kV/10kV Indoor Three-Phase Epoxy Resin Casting Voltage Transformer with Phase-to-Phase Measurement, Dual Secondary Winding, 0.2/0.5/1/3 Accuracy Class, 3.6-12/23-42/40-75kV Insulation, 600×√3 VA Ultra-High Output Capacity for Indoor Three-Phase Voltage & Energy Measurement | – |
| Core Technology | Indoor Three-Phase Epoxy Resin Casting Design + Multi-Voltage Flexibility (3kV/6kV/10kV) + Integrated Three-Phase Configuration + GB1207 and IEC60044-2 Standards Compliant + Rated Insulation Levels (3.6/23/40kV, 7.2/32/60kV, 12/42/75kV) + Rated Frequency 50Hz or 60Hz + Phase-to-Phase Voltage Ratio (3000/100, 6000/100, 10000/100) + Dual Secondary Winding Configuration + Special 10000/100/220 Configuration + Accuracy Classes (0.2, 0.5, 1, 3) + Rated Secondary Load 20×√3-300VA + Maximum Output 500×√3-600×√3 VA + Compact Three-Phase Integrated Design + Proven Epoxy Resin Technology | – |
| Power (Voltage) | 3kV / 6kV / 10kV | – |
| Installation Type | Indoor | – |
| Phase | Three Phase (Integrated) | – |
| Measurement Type | Phase-to-Phase (Line-to-Line) | – |
| Rated Voltage (JSZV12A-3) | 3kV (3000V) | line-to-line |
| Rated Voltage (JSZV12A-6) | 6kV (6000V) | line-to-line |
| Rated Voltage (JSZV12A-10) | 10kV (10000V) | line-to-line |
| Voltage Ratio (JSZV12A-3) | 3000/100 | V |
| Voltage Ratio (JSZV12A-6) | 6000/100 | V |
| Voltage Ratio (JSZV12A-10) | 10000/100 | V |
| Voltage Ratio (Dual Secondary 3kV) | 3000/100/100 | V |
| Voltage Ratio (Dual Secondary 6kV) | 6000/100/100 | V |
| Voltage Ratio (Dual Secondary 10kV) | 10000/100/100 | V |
| Voltage Ratio (Special 10kV) | 10000/100/220 | V |
| Secondary Voltage (Standard) | 100V | V |
| Secondary Voltage (Special) | 100V + 220V | V |
| Rated Frequency | 50Hz or 60Hz | Hz |
| Accuracy Classes | 0.2, 0.5, 1, 3 | – |
| Insulation Level (JSZV12A-3) | 3.6/23/40 | kV |
| Insulation Level (JSZV12A-6) | 7.2/32/60 | kV |
| Insulation Level (JSZV12A-10) | 12/42/75 | kV |
| Max Output (Single Secondary) | 600×√3 (1039VA) | VA |
| Max Output (Dual Secondary) | 500×√3 (866VA) | VA |
| Max Output (Special 10kV) | 600×√3/1000 (1039VA/1000VA) | VA |
| Rated Secondary Load (0.2 Class) | 30×√3 (52VA) | VA |
| Rated Secondary Load (0.5 Class) | 90×√3 (156VA) | VA |
| Rated Secondary Load (1 Class) | 250×√3 (433VA) | VA |
| Rated Secondary Load (0.2/0.2 Dual) | 20×√3/20×√3 (35VA/35VA) | VA |
| Rated Secondary Load (0.2/0.5 Dual) | 20×√3/20×√3 (35VA/35VA) | VA |
| Rated Secondary Load (0.5/0.5 Dual) | 45×√3/45×√3 (78VA/78VA) | VA |
| Rated Secondary Load (0.2/3 Special) | 30×√3/300 (52VA/300VA) | VA |
| Rated Secondary Load (0.5/3 Special) | 90×√3/300 (156VA/300VA) | VA |
| Insulation Type | Indoor Epoxy Resin Casting | – |
| Structure Type | Indoor Three-Phase Integrated Epoxy Resin Casting | – |
| Voltage Level | Low-Medium Voltage (3kV/6kV/10kV) | – |
| Standards Compliance | GB1207 and IEC60044-2 | – |
| FOB Port | Ningbo/Shanghai | – |
| Terms of Payment | Western Union, T/T, Paypal | – |
| Multi-Voltage 3kV/6kV/10kV | Yes (Three Voltage Levels Available) | – |
| Indoor Three-Phase | Yes (Indoor Three-Phase Integrated Configuration) | – |
| Phase-to-Phase Measurement | Yes (Line-to-Line Voltage Measurement) | – |
| Indoor Epoxy Resin Casting | Yes (Indoor Epoxy Resin Casting Insulation) | – |
| Three-Phase Integrated | Yes (Three-Phase Integrated Design) | – |
| 600×√3 VA Ultra-High Output | Yes (1039VA Maximum Output for Single Secondary) | – |
| 3000/100 6000/100 10000/100 Ratio | Yes (Phase-to-Phase Voltage Ratio) | – |
| Dual Secondary Winding | Yes (Dual Secondary Available) | – |
| 10000/100/220 Special Configuration | Yes (100V Three-Phase + 220V Single-Phase) | – |
| 50Hz or 60Hz | Yes (Rated Frequency 50Hz or 60Hz) | – |
| GB1207 Compliant | Yes (In Accordance with GB1207 Standard) | – |
| IEC60044-2 Compliant | Yes (In Accordance with IEC60044-2 Standard) | – |
| 3.6-12/23-42/40-75kV Insulation | Yes (Rated Insulation Levels) | – |
| 0.2 Accuracy Class | Yes (0.2 Metering Accuracy Class Available) | – |
| 0.5 Accuracy Class | Yes (0.5 Metering Accuracy Class Available) | – |
| 1 Accuracy Class | Yes (1 Monitoring Accuracy Class Available) | – |
| 3 Accuracy Class | Yes (3 Monitoring Accuracy Class Available) | – |
| Compact Three-Phase Design | Yes (Integrated Three-Phase Reduces Space) | – |
| Cost-Effective | Yes (Single Three-Phase Unit vs. Three Single-Phase Units) | – |
| Model Type | Rated Voltage | Voltage Ratio | Insulation Level | Max Output | Application |
|---|---|---|---|---|---|
| JSZV12A-3 (Single) | 3kV (line-to-line) | 3000/100 | 3.6/23/40kV | 600×√3 VA (1039VA) | 3kV indoor three-phase phase-to-phase measurement with ultra-high output |
| JSZV12A-6 (Single) | 6kV (line-to-line) | 6000/100 | 7.2/32/60kV | 600×√3 VA (1039VA) | 6kV indoor three-phase phase-to-phase measurement with ultra-high output |
| JSZV12A-10 (Single) | 10kV (line-to-line) | 10000/100 | 12/42/75kV | 600×√3 VA (1039VA) | 10kV indoor three-phase phase-to-phase measurement with ultra-high output |
| JSZV12A-3 (Dual) | 3kV (line-to-line) | 3000/100/100 | 3.6/23/40kV | 500×√3 VA (866VA) | 3kV indoor dual metering applications |
| JSZV12A-6 (Dual) | 6kV (line-to-line) | 6000/100/100 | 7.2/32/60kV | 500×√3 VA (866VA) | 6kV indoor dual metering applications |
| JSZV12A-10 (Dual) | 10kV (line-to-line) | 10000/100/100 | 12/42/75kV | 500×√3 VA (866VA) | 10kV indoor dual metering applications |
| JSZV12A-10 (Special) | 10kV (line-to-line) | 10000/100/220 | 12/42/75kV | 600×√3/1000 VA (1039VA/1000VA) | 10kV indoor three-phase 100V + single-phase 220V special applications |
| Phase-to-Phase (Line-to-Line) Measurement Feature | Description | Benefit |
|---|---|---|
| Phase-to-Phase Voltage Measurement | Measures line-to-line voltage (3000V, 6000V, 10000V) | Direct three-phase voltage measurement without √3 calculation |
| 3000/100 Voltage Ratio | 3000V primary to 100V secondary (3kV systems) | Standard 100V secondary for three-phase metering |
| 6000/100 Voltage Ratio | 6000V primary to 100V secondary (6kV systems) | Standard 100V secondary for three-phase metering |
| 10000/100 Voltage Ratio | 10000V primary to 100V secondary (10kV systems) | Standard 100V secondary for three-phase metering |
| Three-Phase Integrated Measurement | Single unit measures all three phases simultaneously | Balanced three-phase voltage measurement |
| Simplified Metering | Direct phase-to-phase voltage without phase-to-ground conversion | Simplified three-phase energy metering calculations |
| Standard Secondary Voltage | 100V secondary voltage for standard metering devices | Compatible with standard three-phase meters and instruments |
| 600×√3 VA Ultra-High Output Capacity Feature | Description | Benefit |
|---|---|---|
| 600×√3 VA (1039VA) Maximum Output | 1039VA maximum output capacity for single secondary configuration | Highest output capacity in indoor three-phase series |
| 500×√3 VA (866VA) Dual Secondary Output | 866VA output capacity for dual secondary configuration | High capacity for dual indoor three-phase metering applications |
| 600×√3/1000 VA Special Output | 1039VA three-phase + 1000VA single-phase for special configuration | Ultra-high capacity for combined three-phase and single-phase loads |
| Indoor Three-Phase Ultra-High Capacity | Ultra-high output capacity for indoor three-phase systems | Supports extensive indoor multiple load connections |
| Multiple Load Support | Can drive numerous indoor metering devices and relays | Eliminates need for multiple indoor three-phase transformers |
| Indoor SCADA Systems | Sufficient capacity for indoor three-phase data acquisition | Enables advanced indoor monitoring and control |
| Future Expansion | Excess capacity for indoor system upgrades | Flexibility for indoor three-phase system expansion |
| 10000/100/220 Special Configuration Feature | Description | Benefit |
|---|---|---|
| Dual Output Voltage | 100V three-phase output + 220V single-phase output | Provides both three-phase and single-phase voltages from single unit |
| 100V Three-Phase Output | Standard 100V for three-phase metering (600×√3 VA capacity) | Standard three-phase voltage measurement and metering |
| 220V Single-Phase Output | 220V single-phase for auxiliary power or special applications (1000VA capacity) | Auxiliary power supply or single-phase metering from three-phase transformer |
| Combined Application | Three-phase measurement + single-phase auxiliary power | Versatile configuration for special indoor applications |
| High Capacity Both Outputs | 1039VA three-phase + 1000VA single-phase | Adequate capacity for both three-phase and single-phase loads |
| Space-Efficient | Single unit provides both voltage types | Eliminates need for separate single-phase transformer |
| Indoor Three-Phase Integrated Structure Feature | Description | Benefit |
|---|---|---|
| Three-Phase Integrated Design | Three phases integrated into single indoor unit | Compact installation vs. three separate single-phase units |
| Phase-to-Phase Measurement | Direct line-to-line voltage measurement | Simplified three-phase voltage monitoring |
| Space-Efficient | Significantly reduced indoor installation footprint | Ideal for space-constrained indoor substations |
| Cost-Effective | Single three-phase unit vs. three single-phase units | Reduced equipment and installation costs |
| Simplified Installation | Single unit installation vs. three separate units | Faster indoor installation and commissioning |
| Unified Insulation | Consistent insulation across all three phases | Balanced performance and reliability |
| Indoor Epoxy Resin Casting | Indoor-grade epoxy resin for all three phases | Reliable operation in indoor environments |
| Compact Indoor Footprint | Minimal indoor mounting space required | Suitable for compact indoor substations and switchgear |
| Model | Voltage Level | Installation | Measurement Type | Winding Configuration | Accuracy Class / Combination | Rated Secondary Load (VA) | Max Output (VA) | Application |
|---|---|---|---|---|---|---|---|---|
| JSZV12A-3 | 3kV | Indoor | Three-phase line voltage | Single secondary | 0.2 | 30×√3 (52VA) | 600×√3 (1039VA) | High-precision indoor three-phase revenue metering |
| JSZV12A-3 | 3kV | Indoor | Three-phase line voltage | Single secondary | 0.5 | 90×√3 (156VA) | 600×√3 (1039VA) | Standard indoor three-phase metering and monitoring |
| JSZV12A-3 | 3kV | Indoor | Three-phase line voltage | Single secondary | 1 | 250×√3 (433VA) | 600×√3 (1039VA) | General indoor three-phase voltage monitoring |
| JSZV12A-6 | 6kV | Indoor | Three-phase line voltage | Single secondary | 0.2 | 30×√3 (52VA) | 600×√3 (1039VA) | High-precision indoor three-phase revenue metering |
| JSZV12A-6 | 6kV | Indoor | Three-phase line voltage | Single secondary | 0.5 | 90×√3 (156VA) | 600×√3 (1039VA) | Standard indoor three-phase metering and monitoring |
| JSZV12A-6 | 6kV | Indoor | Three-phase line voltage | Single secondary | 1 | 250×√3 (433VA) | 600×√3 (1039VA) | General indoor three-phase voltage monitoring |
| JSZV12A-10 | 10kV | Indoor | Three-phase line voltage | Single secondary | 0.2 | 30×√3 (52VA) | 600×√3 (1039VA) | High-precision indoor three-phase revenue metering |
| JSZV12A-10 | 10kV | Indoor | Three-phase line voltage | Single secondary | 0.5 | 90×√3 (156VA) | 600×√3 (1039VA) | Standard indoor three-phase metering and monitoring |
| JSZV12A-10 | 10kV | Indoor | Three-phase line voltage | Single secondary | 1 | 250×√3 (433VA) | 600×√3 (1039VA) | General indoor three-phase voltage monitoring |
| JSZV12A-3 | 3kV | Indoor | Three-phase line voltage | Dual secondary | 0.2 / 0.2 | 20×√3 / 20×√3 (35VA / 35VA) | 500×√3 (866VA) | Dual high-precision indoor three-phase metering |
| JSZV12A-6 | 6kV | Indoor | Three-phase line voltage | Dual secondary | 0.2 / 0.5 | 20×√3 / 20×√3 (35VA / 35VA) | 500×√3 (866VA) | High-precision metering + standard monitoring |
| JSZV12A-10 | 10kV | Indoor | Three-phase line voltage | Dual secondary | 0.5 / 0.5 | 45×√3 / 45×√3 (78VA / 78VA) | 500×√3 (866VA) | Dual standard indoor three-phase metering |
| JSZV12A-10 | 10kV | Indoor | Three-phase + single | Special configuration | 0.2 / 3 | 30×√3 / 300 (52VA / 300VA) | 600×√3 / 1000 (1039VA / 1000VA) | High-precision three-phase metering + single-phase monitoring |
| JSZV12A-10 | 10kV | Indoor | Three-phase + single | Special configuration | 0.5 / 3 | 90×√3 / 300 (156VA / 300VA) | 600×√3 / 1000 (1039VA / 1000VA) | Standard three-phase metering + single-phase monitoring |
| Indoor Three-Phase Phase-to-Phase Application Scenario | Recommended Model | Key Advantage | Typical Installation |
|---|---|---|---|
| Indoor Substations | JSZV12A-3/6/10 | Phase-to-phase measurement + 600×√3 VA ultra-high output | Indoor distribution substations |
| Indoor Switchgear | JSZV12A-3/6/10 | Three-phase integrated for indoor metal-clad switchgear | Indoor GIS, AIS, metal-clad switchgear |
| Indoor Dual Metering | JSZV12A-3/6/10 (Dual) | Dual secondary for independent indoor metering | Indoor billing + monitoring applications |
| Indoor Energy Measurement | JSZV12A-3/6/10 | High-precision three-phase phase-to-phase energy metering | Indoor revenue metering systems |
| Space-Constrained Indoor Installations | JSZV12A-3/6/10 | Compact three-phase integrated vs. three single-phase units | Indoor substations with limited space |
| Special Three-Phase + Single-Phase Applications | JSZV12A-10 (10000/100/220) | 100V three-phase + 220V single-phase from single unit | Indoor applications requiring both voltage types |
| High-Capacity Indoor Applications | JSZV12A-3/6/10 | 600×√3 VA (1039VA) ultra-high output capacity | Indoor applications with extensive load requirements |
| Feature | JSZV12A-3/6/10 (Indoor Three-Phase Phase-to-Phase) | JSZW-3/6/10 (Indoor Three-Phase Phase-to-Ground) | JSZWK-3/6/10 (Outdoor Anti-Resonance Three-Phase) |
|---|---|---|---|
| Measurement Type | Phase-to-phase (line-to-line) | Phase-to-ground | Phase-to-ground |
| Voltage Ratio | 3000/100, 6000/100, 10000/100 | 3kV-10kV/√3/100V/√3 + 100V/3 | 3kV-10kV/√3/100V/√3 + 100V |
| Maximum Output | 600×√3 VA (1039VA), 500×√3 VA (866VA) | 600VA (dual), 450/450VA (triple) | 1000-1500VA |
| Installation Type | Indoor | Indoor | Outdoor |
| Anti-Resonance | No | No | Yes (ferroresonance suppression) |
| Special Configuration | Yes (10000/100/220) | No | No |
| Key Advantage | Phase-to-phase + 600×√3 VA ultra-high output + 10000/100/220 special | Phase-to-ground + grounding protection + 600VA output | Anti-resonance + ferroresonance suppression + 1500VA output |
| Typical Application | Indoor substations, indoor switchgear, phase-to-phase measurement | Indoor substations, indoor switchgear, grounding protection | Outdoor ungrounded systems, resonant grounded systems |
Bepto is a leading Chinese company in electrical insulation, focused on developing advanced solutions for future power systems. We support transmission and distribution safety and growth, with long-term partners including State Grid, ABB, Schneider, Siemens, and GE. Our services reach clients in over 22 countries.

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Bepto focuses on the global market and provides our clients with products suitable for the local market:
Unwavering in our dedication to customers and delivering cutting-edge innovations,Bepto stands as your steadfast ally on the journey ahead.