10 kV Post-Type Current Transformer Family

LZZBJ(6/9)-10 C(1/2) 10kV Post-Type Reinforced Cast-Resin Current Transformer with Protective Class is a family of reinforced, cast-insulation instrument transformers for medium-voltage measurement and protection duties. The family includes LZZBJ6-10 C, LZZBJ9-10 C1, and LZZBJ9-10 C2 configurations. Each configuration is identified by a design number and structure code, so the selected model, current ratio, winding arrangement, accuracy combination, and burden must be confirmed before procurement. This page presents the supplied family data as a selection reference rather than treating every value as universal across all variants.

Family Configuration and Technical Scope

The supplied data gives a rated voltage of 10 kV for the family. For the C1 and LZZBJ6 configurations, listed one-second thermal-current values run from 0.75 kA at the low end to 80 kA at 2000–3000 A, while listed dynamic-current values run from 1.8 kA to 160 kA. C2 data is organized by current ranges and winding blocks. These figures should be matched to the selected ratio and approved drawing, not applied to a different variant by assumption.

Selection Features That Matter in a Project

• Metering and protection combinations: C1 and LZZBJ6 variants list combinations such as 0.2S/10P10 and 0.5S/10P10. C2 variants add combinations involving 10P15 and can be supplied in two-winding or three-winding forms.
• Range-dependent performance: Primary-current ranges and short-circuit withstand figures vary by selected configuration. A correct request should state the rated primary current and required secondary output rather than using only the family designation.
• Clear terminal reference: Primary terminals are marked P1 and P2. The supplied C2 drawing identifies secondary terminals 1S1, 1S2, 2S1, and 2S2; verify terminal markings for the exact model ordered.
• Mounting variation: The family uses base-plate mounting. The source material lists 4-M12 or 8-M12 arrangements for certain configurations, while LZZBJ6-10 C is shown with four 12 × 25 mm slots.
• Configuration-led procurement: The same product-family name covers distinct design numbers, structure codes, and winding options. A technical schedule is the safest way to avoid a mismatch.

Dimensions and Installation Planning

The supplied drawings show different mechanical envelopes. LZZBJ9-10 C1 is shown with a 270 mm top width, 222 mm height, and 155 mm side-view width, with 275 or 310 mm base lengths indicated. LZZBJ6-10 C is shown with a 270 mm top width, 225 mm height, and 310 mm base width. LZZBJ9-10 C2 is shown with a 295 mm top width, 236±1 mm height, and 180 mm side-view width. These are drawing-derived reference values; confirm the relevant drawing revision and selected current range before final panel layout.

Applications and Engineering Use

LZZBJ(6/9)-10 C(1/2) 10kV Post-Type Reinforced Cast-Resin Current Transformer with Protective Class can be considered for 10 kV distribution equipment where current measurement and protective functions are specified together. Typical contexts include medium-voltage switchgear, protection panels, metering compartments, and cubicle installations that use a base-mounted post-type transformer. The suitability of any variant depends on the system voltage, conductor arrangement, insulation coordination, secondary circuit design, and the project protection philosophy.

For metering and protection duties, specify the applicable accuracy class, burden, relay requirements, and winding arrangement in the project documentation. Compare the listed two-winding and three-winding arrangements with the actual scheme.

An arc flash study is not a product specification for this current transformer, but its system-level findings can inform the protection-engineering review that surrounds equipment selection. Likewise, a transformer winding temperature indicator serves a different monitoring purpose and should not be conflated with a current-transformer secondary circuit. Keeping those functions distinct improves the clarity of a bill of materials and technical query.

Technical Verification Checklist

Before issuing a purchase order, provide the selected model, rated primary and secondary current, frequency if applicable to the project, metering and protection class combination, rated burden, number of secondary windings, terminal requirements, mounting drawing, and quantity. Confirm whether the installation calls for the C, C1, or C2 structure code. If the project has special insulation, clearance, relay-coordination, or panel-space requirements, include them in the inquiry so the supplier can check the family data against the intended application.

Why This Family Deserves a Configuration Review

The differentiation of this product family is its ability to cover several 10 kV current-transformer configurations within a clearly identified LZZBJ series. Rather than claiming that one version is universally best, the supplied information supports an engineering-led comparison of current range, accuracy combination, protective class, secondary output, winding count, and mechanical format. That neutral selection method is particularly useful where a panel design must coordinate metering, protection, terminals, and mounting in one decision.

LZZBJ(6/9)-10 C(1/2) 10kV Post-Type Reinforced Cast-Resin Current Transformer with Protective Class should therefore be specified from the selected drawing and project data sheet. The source material records MOQ 1, payment by T/T, and a stated delivery time within 20 days after receipt of payment; commercial terms should be reconfirmed with the supplier for the final order. Request a detailed technical proposal and quotation with the complete electrical and mechanical requirements so the offered configuration can be checked before release.