JSZV12A-3,6,10R Three-Phase Cast-Resin Voltage Transformer

The JSZV12A-3,6,10R Three-Phase Cast-Resin Voltage Transformer V-Type Connection with Fuse Protection is a three-phase instrument transformer for voltage measurement and voltage input to measuring or indicating instruments in distribution equipment. It uses a single cast-resin body with primary terminals marked A, B, and C. The model designation identifies a voltage transformer, three-phase construction, cast insulation, V-type connection, design serial number 12, structure code A, rated-voltage options of 3 kV, 6 kV, or 10 kV, and fuse protection indicated by R.

The JSZV12A-3,6,10R Three-Phase Cast-Resin Voltage Transformer V-Type Connection with Fuse Protection is intended for a documented measuring circuit, not as a general-purpose power transformer. Start selection with system voltage and required ratio, then confirm secondary-output count, accuracy class, connected burden, insulation level, and wiring diagram. This sequence avoids assuming that units from the same series have the same secondary duty.

V-Type Connection and Fuse Protection

The V-type arrangement places the measuring elements between phases A–B and B–C. The source wiring diagrams identify the three-phase line conductors as A, B, and C and show secondary circuits connected to voltmeters, with the secondary common point earthed. Figure 1 applies to the single-output ratings, while figure 2 applies to the listed two-output ratings. Use the figure corresponding to the selected ratio during engineering and commissioning.

Fuse protection is part of the product designation and the source diagrams show fuses on the primary-side arrangement. Fuse protection should nevertheless be coordinated with the approved system protection design. It does not replace review of upstream protection, conductor arrangement, isolation procedures, grounding, or project-specific electrical requirements.

• Three-phase construction: a cast-resin body with A, B, and C primary terminals.
• V-type measurement circuit: measuring elements arranged between A–B and B–C.
• Cast insulation: a cast-insulation product design.
• Fuse protection: supplied as the R version identified in the designation.
• Configuration choice: single-output, two-output, and 10000/100/220 alternatives are listed.

Available Ratios and Technical Data

Single-output versions cover 3000/100, 6000/100, and 10000/100. The listed three-phase rated secondary outputs are 30 × √3 VA at class 0.2 for 3000/100, 90 × √3 VA at class 0.5 for 6000/100, and 250 × √3 VA at class 1 for 10000/100. Their stated maximum output is 600 × √3 VA, and the source associates this group with figure 1.

The dual-output group includes 3000/100/100 and 6000/100/100 at 20 × √3 VA per winding, with class 0.2/0.2 and 0.2/0.5 respectively. The 10000/100/100 configuration lists class 0.5/0.5 with 45 × √3 VA per winding. The source lists 500 × √3 VA per output for this group and uses figure 2. For 10000/100/220, the source lists class 0.2/3 or 0.5/3, output combinations of 30 × √3 VA / 300 VA or 90 × √3 VA / 300 VA, and maximum outputs of 600 × √3 VA / 1000 VA.

Selection Guide

For a 3 kV system with one secondary output, review the 3000/100 ratio, class 0.2, 30 × √3 VA rating, 3.6/23/40 kV insulation level, and figure 1. For a 6 kV single-output circuit, review 6000/100, class 0.5, 90 × √3 VA, 7.2/32/60 kV insulation level, and figure 1. For a 10 kV single-output application, review 10000/100, class 1, 250 × √3 VA, 12/42/75 kV insulation level, and figure 1.

Where two separate secondary outputs are required, compare 3000/100/100, 6000/100/100, and 10000/100/100 with the intended connected instruments and burden. Where a 10 kV project needs the listed combined metering and indicating or protective duty, review 10000/100/220. The JSZV12A-3,6,10R Three-Phase Cast-Resin Voltage Transformer V-Type Connection with Fuse Protection should be specified only after the exact duty is clear.

Power distribution network design requires a system-level check. Confirm the selected ratio against primary voltage, meter input, secondary wiring, burden, grounding practice, panel layout, and local requirements. A correct nameplate ratio alone does not establish that the connection, accuracy class, or physical arrangement is suitable for the actual circuit.

Installation Considerations

The dimension drawing shows three orthographic views, primary terminals, a front nameplate, and the mounting pattern. Listed drawing dimensions include 385 mm, 351 mm, 350 mm, 300 mm, 310 ±0.5 mm, and 260 ±0.5 mm in different views. These figures should be checked against the latest approved drawing before an enclosure, base plate, cable route, or replacement plan is finalized. The source itself advises confirmation before quoting an overall envelope value.

Installation space is a practical selection point. Verify terminal orientation, primary conductor clearance, secondary-cable routing, access for tightening and inspection, and the four mounting holes before installation. Do not infer performance characteristics from an image or use an unrelated equipment label as a specification source. The stated wiring diagram and approved project drawings should govern the completed installation.

The term 35kv dry type transformer can occur in broader search activity, but it does not describe this 3 kV, 6 kV, and 10 kV instrument-transformer series. The JSZV12A-3,6,10R Three-Phase Cast-Resin Voltage Transformer V-Type Connection with Fuse Protection must not be substituted for a 35 kV dry-type transformer unless voltage class, equipment role, and all technical requirements have been independently verified.

Typical Uses and Procurement Information

• Three-phase voltage measurement in 3 kV, 6 kV, and 10 kV distribution equipment.
• Voltage input to measuring and indicating instruments using a V-type connection.
• Single-secondary measurement duties using the stated figure 1 configurations.
• Two-secondary metering or indicating duties using the stated figure 2 configurations.

These applications describe the documented product roles, not a universal suitability guarantee. Final acceptance depends on the approved circuit, required accuracy, burden, insulation coordination, environmental conditions, and applicable regulations. For procurement review, provide nominal voltage, selected ratio, secondary-output requirement, accuracy class, connected burden, wiring requirement, and installation-drawing details. The source lists MOQ 1, T/T payment terms, and delivery within 20 days after receipt of payment; confirm commercial and technical details for the selected configuration before ordering.

The practical advantage of the JSZV12A-3,6,10R Three-Phase Cast-Resin Voltage Transformer V-Type Connection with Fuse Protection is its documented choice of ratio, output arrangement, accuracy class, insulation level, wiring figure, and mounting information. Those facts support a transparent engineering review without making unsupported claims about system performance.

Source Dimension Drawing