Product Overview
JDZQN-10 is an indoor epoxy cast-resin metering voltage transformer designed for 10kV medium-voltage power systems. Based on electromagnetic induction, it converts the high voltage of an AC power line into a standardized low secondary voltage, typically 100V, for electric energy meters, measuring instruments, voltage monitoring devices and relay protection input circuits.
This model should be written differently from anti-ferroresonance or multi-secondary protection VTs. JDZQN-10 is primarily a metering-oriented voltage transformer. Its key value is stable ratio accuracy for metering and measurement, with a simple 10/0.1kV voltage ratio, compact indoor cast-resin structure and 12/42/75kV insulation level for 12kV class switchgear.
Product Display
Application Position
JDZQN-10 is installed inside indoor medium-voltage switchgear, metering cabinets or utility metering panels. The primary side is connected to the 10kV system, and the secondary side supplies a 100V voltage signal to energy meters, voltage meters, power monitoring devices or relay protection equipment.
Main Applications
- 10kV indoor medium-voltage switchgear
- 12kV class metering cabinets and distribution panels
- Electric energy metering and revenue metering systems
- Voltage measurement and voltage indication circuits
- Power monitoring devices requiring 100V voltage input
- Metering circuits requiring 0.2 or 0.5 accuracy class
Key Specifications
| Item | Specification |
|---|---|
| Model | JDZQN-10 |
| Product type | Indoor metering voltage transformer / potential transformer |
| Insulation structure | Indoor epoxy cast-resin insulation |
| Installation | Indoor switchgear or metering cabinet |
| Rated voltage ratio | 10 / 0.1kV |
| Primary system voltage | 10kV system |
| International voltage class | 12kV class |
| Secondary voltage | 100V |
| Rated frequency | 50Hz |
| Ambient temperature | -25°C to +55°C |
| Accuracy class and rated output | 0.2 — 20VA; 0.5 — 50VA |
| Max. output | 500VA |
| Rated insulation level | 12/42/75kV |
| Approximate weight | 35kg |
| Standard reference | Q/GDW 11682-2017 and project-specific requirements |
Application Fit
Suitable For
- Indoor 10kV metering switchgear and utility metering panels
- Revenue metering and measurement applications requiring 100V output
- Projects requiring 0.2 or 0.5 accuracy class voltage signals
- Medium-voltage systems where a simple metering VT is preferred over a protection-heavy VT
- Indoor applications requiring compact epoxy resin insulation and stable ratio performance
Not Recommended For
- Outdoor exposed installation without a suitable enclosure
- Anti-ferroresonance applications requiring a dedicated three-phase anti-ferroresonance VT
- Applications requiring 220V auxiliary power output or residual-voltage output
- High-frequency electronic transformer applications
- Oil-immersed voltage transformer requirements
- Projects requiring voltage ratios other than 10/0.1kV without technical confirmation
Installation Conditions
- Installation location: indoor switchgear or protected indoor metering cabinet
- Rated frequency: 50Hz power-frequency AC system
- Ambient temperature: -25°C to +55°C
- Electrical clearance: confirm primary terminal clearance according to the switchgear design
- Secondary wiring: keep meter wiring secure and check terminal polarity before commissioning
- Maintenance: keep the resin surface clean and inspect terminals during scheduled maintenance
Technical Structure
| Component | Description |
|---|---|
| Epoxy cast-resin body | Provides indoor insulation, mechanical strength and moisture resistance |
| Primary winding | Designed for 10kV rated primary voltage |
| Secondary winding | Provides 100V output for metering and measurement devices |
| Metering accuracy design | Supports 0.2 class and 0.5 class accuracy with corresponding rated output |
| Terminal box | Secondary terminal section for meter and instrument wiring |
| Mounting base | Base-mounted structure for fixed installation inside switchgear |
Model Designation
- J = Voltage transformer
- D = Single-phase / monophase structure
- Z = Resin casting insulation
- Q = Not grounded type
- N = Indoor type
- 10 = Voltage level code for 10kV system application
Technical Data
| Model | Rated
Voltage Ratio |
Accuracy Class /
Rated Output |
Max.
Output |
Rated
Insulation Level |
|---|---|---|---|---|
| JDZQN-10 | 10 / 0.1kV | 0.2 — 20VA | 500VA | 12 / 42 / 75kV |
| 0.5 — 50VA | 500VA |
Technical notes:
- One voltage transformer is supplied with one selected accuracy class and corresponding rated output.
- The standard secondary voltage is 100V for metering and measurement instruments.
- The 0.2 class option is suitable for higher-accuracy metering requirements.
- The 0.5 class option is suitable for general measurement and monitoring applications.
- If the required data exceeds the listed scope, it should be confirmed by agreement between manufacturer and purchaser.
Installation and Dimensions
Dimension Reference
| Item | Reference Value |
|---|---|
| Overall base length | 378mm |
| Main body top length | 320mm |
| Internal reference spacing | 175mm |
| Base width | 180mm |
| Side width reference | 185mm |
| Overall height | 280mm reference |
| Body height reference | 260mm |
| Primary terminal bolt | 2-M10 |
| Grounding bolt | M8 reference |
| Approximate weight | 35kg |
Terminal and Wiring
- The wiring diagram shows a metering voltage transformer connection for three-phase line voltage measurement.
- Primary terminal direction and phase connection should follow the approved switchgear wiring drawing.
- Secondary terminal polarity must be verified before connecting energy meters or measuring instruments.
- Grounding point should be connected according to the cabinet grounding scheme.
- Metering circuit wiring should be kept secure to reduce secondary voltage drop and measurement error.
Compliance and Testing
The sample information references Q/GDW 11682-2017 and special customer requirements. For international projects, the final standard reference should be confirmed according to the buyer’s specification and applicable metering requirements.
Typical Routine Tests
- Visual inspection and nameplate verification
- Ratio verification
- Polarity and terminal marking check
- Accuracy test at rated burden
- Insulation resistance test
- Power-frequency withstand voltage test
- Induced withstand voltage test where applicable
- Secondary terminal and grounding inspection
Engineering Notes
- JDZQN-10 should be positioned as a metering voltage transformer, not as a protection-heavy anti-ferroresonance VT.
- The 10/0.1kV ratio is clear and easy for international buyers to understand as a 10kV to 100V metering VT.
- The 12/42/75kV insulation level supports 12kV class switchgear expression on export pages.
- For revenue metering, confirm whether 0.2 class accuracy is required by the utility or project specification.
- For general monitoring, 0.5 class may be sufficient depending on the instrument requirement.
- Do not describe this product as a high-frequency transformer; it is a 50Hz power-frequency voltage transformer.
Selection Guide
Select by metering requirement: Choose JDZQN-10 when the main requirement is electric energy metering or accurate voltage measurement in a 10kV system. It is especially suitable where a simple 10/0.1kV ratio and stable 100V secondary output are required.
Select by accuracy class: Use 0.2 class for higher-accuracy metering or utility metering applications. Use 0.5 class for general voltage measurement, indication or monitoring where the accuracy requirement is lower.
Select by voltage class: For international pages and buyer specifications, write the product as a 10kV voltage transformer for 12kV class switchgear, with rated insulation level 12/42/75kV.
Select by installation space: Confirm the 378mm base length, 180mm base width and 35kg approximate weight before cabinet layout approval.
Select by inquiry clarity: A clear international inquiry can state: JDZQN-10 indoor metering VT, 10/0.1kV, 0.2 class 20VA or 0.5 class 50VA, 12/42/75kV insulation, 50Hz, quantity required.