Product Overview
Functional Definition
The JSZV12-10R series combined voltage transformers are precision electromagnetic instruments designed for accurate voltage measurement, قياس الطاقة, and الطاقة المساعدة supply in medium-voltage AC power systems. These combined transformers integrate voltage transformation with built-in high-voltage حماية الصمامات on each phase, utilizing electromagnetic induction principles to provide galvanically isolated الجهد الثانوي signals proportional to الجهد الأولي.
Key Ratings
| Item | Specification (per order / nameplate) |
|---|---|
| System voltage class | 10 kV class (للداخل معدات التبديل and distribution applications) |
| Rated frequency | 50 Hz (60 Hz available upon request) |
| Rated voltage ratio | 10000/100 V (القياس) or 10/0.1/0.22 kV (dual الإخراج with الطاقة المساعدة) |
| Secondary voltage outputs | 100 V (precision القياس) and 220 V (الطاقة المساعدة / control circuit supply) |
| Accuracy classes | 0.2 and 0.5 as specified |
| Rated burden | 20 VA (0.2 class), 60 VA (0.5 class), per ordered specification |
| Maximum output | 500-600 VA (short-time) |
| Insulation level | 12/42/75 kV (Um/Ud/Up) |
| Configuration | Three-phase V-connection (two أحادي الطور units) with integrated fuses on A, B, C phases |
| Fuse protection | Integrated high-voltage fuses on primary اللفات (A/B/C phases) with accessible secondary terminals for maintenance |
| Applicable standards | GB/T 20840.3-2013, GB/T 20840.4-2015, GB 311.1-2012, JJG 314-2010 |
Product Shows
Working Principle
Operating on Faraday’s law of electromagnetic induction, the combined محول الجهد features high-grade silicon steel laminated cores with primary اللفات connected to the جهد النظام and secondary اللفات delivering standardized الإخراج voltages. The dual-الإخراج configuration provides 100 V for precision القياس and energy measurement, while the 220 V الإخراج serves as الطاقة المساعدة for control systems, circuit breakers, and الحماية relays. Integrated high-voltage fuses on each phase primary winding provide short-circuit الحماية and prevent fault propagation.
System التطبيق Position
- Medium Voltage Distribution: 10kV للداخل معدات التبديل, لوحات التوزيع, and ring main units
- Energy القياس: Revenue-grade voltage measurement for electricity billing systems
- Auxiliary Power Supply: 220 V AC power source for قواطع الدوائر control, الحماية relays, and monitoring equipment
- Protection Circuits: Voltage-dependent الحماية schemes including فرط الجهد, انخفاض الجهد, and earth fault detection
- SCADA Integration: Voltage monitoring and data acquisition in supervisory control systems
Structural Overview
Fully-enclosed راتنج الإيبوكسي cast البناء with premium cold-rolled silicon steel cores ensures superior insulation performance, moisture resistance, and long-term stability. The combined design integrates dual secondary outputs in a compact footprint suitable for للداخل معدات التبديل البيئات. Integrated حماية الصمامات on all three phases provides reliable short-circuit interruption with easy fuse replacement via accessible secondary terminals without affecting operation.
Model Designation
Model Code Explanation
- J — Combined instrument transformer (voltage + الحماية)
- S — للداخل النوع (室内)
- Z — Cast-resin (epoxy) insulated, fully enclosed structure
- V — محول الجهد function
- 12 — Design series / platform iteration
- 10 — Voltage class (kV)
- R — Integrated حماية الصمامات (熔断器)
Configuration Options
The JSZV12-10R is available in multiple voltage class variants (10kV, 6kV, 3kV) and الإخراج configurations:
- JSZV12-10R: 10kV class with dual الإخراج (100V القياس + 220V الطاقة المساعدة)
- JSZV12-6R: 6kV class variant
- JSZV12-3R: 3kV class variant
- JSZV-10-10R: Alternative 10kV configuration with single 100V output
All variants feature integrated حماية الصمامات and fully-enclosed راتنج الإيبوكسي البناء. Selection depends on جهد النظام class and الإخراج requirements.
Service Conditions
The JSZV12-10R series combined voltage transformers are designed for للداخل operation under normal ظروف الخدمة in medium-voltage power systems.
- Installation environment: للداخل التركيب only
- Altitude: Not exceeding 1000 m above sea level (higher altitude configurations available upon engineering confirmation)
- Ambient temperature: −5 °C to +40 °C
- Relative humidity: ≤ 80% (without condensation)
- Environmental conditions: Free from corrosive gases, vapors, or conductive deposits; free from explosive or flammable media; no conductive dust (carbon, metallic particles); no severe vibration, mechanical shock, or impact
Construction
Construction Design
- Structure: Fully-enclosed combined النوع for للداخل معدات التبديل integration
- Insulation: راتنج الإيبوكسي cast insulation system with superior dielectric properties
- Core material: Premium cold-rolled silicon steel laminations for low losses and high accuracy
- Fuse integration: High-voltage fuses on A, B, C phase primary اللفات with coordinated interrupting capacity
- Secondary terminals: Accessible terminal blocks for easy fuse replacement without affecting operation
- Configuration: ثلاثي الطور V-connection or two independent أحادي الطور units
The راتنج الإيبوكسي casting provides stable insulation properties and resistance to moisture, contamination, tracking, and aging for long-term للداخل service. The integrated fuse design prevents fault propagation and enhances system reliability.
Windings & Terminal Marking
- Primary terminals (per phase): A / B / C (high-voltage side)
- Secondary terminals (100V القياس): a / x (per phase)
- Secondary terminals (220V auxiliary): a1 / x1 (where applicable)
- Neutral/ground terminal: N or dedicated التأريض point
Terminal markings follow المعيار محول الجهد polarity conventions. Under normal operating conditions, when primary terminal A is positive, secondary terminal a is positive (additive polarity). Correct terminal identification shall be observed to ensure القياس accuracy and الحماية coordination.
Technical Data
This section provides selection-oriented البيانات الفنية for the JSZV12-10R series للداخل, fully-enclosed combined محول الجهد with integrated fuses, used in 10 kV class AC systems (50 Hz). Data shown below is intended for preliminary selection of voltage ratios, فئة الدقة combinations, rated burdens, and dual-الإخراج configurations.
Definitions: Accuracy class combination indicates available القياس accuracy grades per الإخراج. Rated burden (VA) is specified per secondary circuit. Maximum output is the short-time overload capability. Insulation level follows Um/Ud/Up notation per GB 311.1-2012.
Notation: Dual-الإخراج models provide both 100V (القياس) and 220V (الطاقة المساعدة); single-الإخراج models provide 100V only. Acceptance shall be based on nameplate values and the factory test report.
Data Reference
Auxiliary Power الإخراج Specifications (قواطع الدوائر Control / Relay Supply)
| Type | Rated Voltage Ratio (V) |
Accuracy Class & Rated الإخراج (VA) |
Max الإخراج (VA) |
Rated Insulation Level (KV) |
|||
|---|---|---|---|---|---|---|---|
| 0.2 | 0.5 | 1 | 6p | ||||
| JSZW3-10 | 10000/3/100/3/100/3 | 15 | 30 | 60 | 50 | 300 | 12/42/75 |
| JSZW3-6 | 6000/3/100/3 | 7.2/32/60 | |||||
| JSZW3-3 | 3000/3/100/3 | 3.6/20/40 | |||||
Standards & Normative References
| Standard | Title | Application |
|---|---|---|
| GB/T 20840.3-2013 | Instrument Transformers – Part 3: Electromagnetic Voltage Transformers | Primary محول الجهد requirements |
| GB/T 20840.4-2015 | Instrument Transformers – Part 4: Combined Transformers | Combined instrument transformer specific requirements |
| GB 311.1-2012 | Insulation Coordination for High-Voltage Transmission Equipment | Insulation level المواصفة and coordination |
| JJG 314-2010 | Verification Regulation of Voltage Transformers | Accuracy verification and calibration procedures |
| IEC 61869-3 | Instrument Transformers – Part 3: Additional Requirements for Inductive Voltage Transformers | International محول الجهد requirements (reference) |
| IEC 61869-5 | Instrument Transformers – Part 5: Additional Requirements for Combined Transformers | International محول مجمع requirements (reference) |
| GB/T 16927 | High-Voltage Test Techniques | Dielectric test procedures |
| DL/T 866 | Technical المواصفة for Voltage Transformers in Power Systems | Power system التطبيق guidelines (where applicable) |
Factory Test Compliance
- Routine tests per applicable GB/IEC requirements (including polarity/marking verification, ratio accuracy, phase displacement, and burden accuracy per specified class)
- Dielectric tests per insulation coordination requirements (power-frequency withstand, impulse withstand per GB 311.1-2012)
- Partial discharge test where specified by project requirement or applicable standard
- Temperature rise test to verify thermal performance under rated and maximum burden conditions
- Fuse coordination test to verify integrated fuse interrupting capability and selectivity
- Visual and dimensional inspection including marking conformity and workmanship verification
- Type and special tests as required by project المواصفة or certification authority
Installation & Dimensions
Installation Environments
- Outline dimensions and mounting details are provided in the dimensional drawings.
- The محول مجمع shall be securely mounted using the designated fixing holes or bracket assembly.
- Primary connection may be made via busbar or bolted cable terminals depending on معدات التبديل configuration.
- Secondary circuits shall be wired to designated terminal blocks maintaining proper phase identification.
- Adequate clearance shall be maintained for insulation coordination, heat dissipation, fuse accessibility, and الصيانة access.
- Fuse replacement can be performed via secondary terminal access without de-energizing the التركيب (per manufacturer procedure).
Outlines
Connection Diagrams
Three-phase V-connection (المعيار configuration):
- Two أحادي الطور units connected in open-delta (V) configuration
- Provides ثلاثي الطور voltage measurement capability with two transformers
- Primary terminals: A-N, B-N (or A-B-C for wye-connected systems)
- Secondary 100V terminals: a-x (per phase)
- Secondary 220V terminals: a1-x1 (where applicable for الطاقة المساعدة)
Safety Notes
- Secondary circuits must never be left open when the transformer is energized, as dangerous جهد عالي may appear across open terminals.
- During inspection or الصيانة, de-energize primary circuits or follow manufacturer lock-out/tag-out procedures.
- Fuse replacement shall be performed only by qualified personnel following manufacturer instructions.
- One point of each secondary circuit shall be reliably grounded in accordance with GB 50150 or applicable local المعايير.
- The 220V الطاقة المساعدة الإخراج shall be protected by appropriately rated secondary circuit breakers or fuses per load requirements.
- All التركيب and الصيانة work shall comply with DL 408 (Electric Power Safety Work Regulations) or local electrical safety regulations.
Ordering Information
When placing an order, the required configuration shall be specified according to the local grid requirements, applicable المعايير, and project technical specification. The following parameters shall be clearly stated for technical confirmation and production release:
Selection Guidance
- System voltage class (10kV, 6kV, or 3kV)
- Voltage ratio (primary/secondary voltages)
- Output configuration (dual 100V+220V or single 100V)
- Accuracy requirements (0.2 or 0.5 class)
- Rated burden (VA) per secondary circuit
- Connection configuration (V-connection or أحادي الطور)
- Insulation level (if non-المعيار)
- Fuse rating (if specific coordination required)
For applications with extended temperature range, higher altitude operation, enhanced corrosion الحماية, specific fuse coordination, or special certificates, specify requirements at ordering stage. Custom configurations require technical agreement and final data sheet confirmation prior to production.
Customization Options
Available upon request:
- Extended temperature range: Operation beyond −5°C to +40°C المعيار range
- Custom voltage ratios: Non-المعيار primary or secondary voltages
- Enhanced environmental الحماية: Conformal coating or special sealing for corrosive environments
- Alternative الإخراج configurations: Custom الجهد الثانوي or burden combinations
- Specific fuse coordination: Custom fuse ratings for project الحماية schemes
- High-altitude operation: Enhanced insulation for installations above 1000m elevation