LA-10Q Through-Wall Current Transformer Overview

The LA-10Q 10kV Through-Wall Current Transformer, Full-Condition Type, 5-1000A Primary is a medium-voltage instrument transformer designed for through-wall or panel installation. The primary conductor passes through the unit, while the drawing identifies primary terminals as P1 and P2 and shows a separate secondary-terminal arrangement. This configuration gives engineering teams a defined measurement and protection interface where a wall or panel penetration is part of the installation design.

Its designation is documented as L for current transformer, A for through-wall style, 10 for the rated 10 kV voltage, and Q for full operational mode. The source lists options from 5–40 A and 50–150 A through 200, 250, 300, 400, 500, 600, 800, and 1000 A.

Core Specifications

The accuracy information is printed as merged entries across the rated-current table. The 0.2(s) secondary-output entry is shown as a slash for the first four current ranges and as 10 for 300 A through 1000 A. The 0.2, 0.5, and 10P10 columns show 10, 10, and 15 respectively. Because the drawing does not print a unit for that output column, these figures should be confirmed against the final project specification before release.

Features That Support Careful Selection

• Defined 10 kV application basis: the rated voltage is explicitly stated, helping engineering teams start from the correct voltage class.
• Broad documented primary-current coverage: the table spans low ranges through 1000 A, allowing the selected rating to follow the actual primary-current requirement.
• Metering and protection combinations: 0.2/10P10 and 0.5/10P10 are shown in the source material for the full rating table.
• Recorded fault-current data: short-time thermal current progresses from 0.3 to 60 kA/s, while dynamic stable current progresses from 0.75 to 130 as printed.
• Mechanical reference information: the supplied drawing shows a plate arrangement with four Ø14 holes, P1/P2 labels, and a secondary-terminal example.

The LA-10Q 10kV Through-Wall Current Transformer, Full-Condition Type, 5-1000A Primary should therefore be evaluated as part of a complete measurement and protection arrangement, not only by nominal voltage. In particular, verify conductor routing, the wall or panel opening, terminal access, clearances, and the matching secondary circuit before finalizing a purchase specification. A rated current alone does not prove that the installation interface is suitable.

Selection Framework for Engineers and Buyers

Begin with the primary-current range that matches the expected operating condition. For 5–40 A, 50–150 A, 200 A, and 250 A selections, the 0.2(s) field is marked with a slash in the source drawing. For 300 A through 1000 A, that field is shown as 10. Next, align the applicable accuracy combination with the metering and protection design. Then review short-time thermal and dynamic values against the project fault study and protection-coordination requirements.

There is another practical check: the mechanical drawing is not a substitute for site measurement. The documented views show 260 mm, 460 mm, and 500 mm horizontal dimensions; the plate view shows 230 mm and 285 mm vertical dimensions; and a secondary-terminal example includes 30, 155, 160, 185, 200, and 230 mm dimensions. The drawing gives no diameter for the through-wall opening or primary conductor, so confirm those interfaces for the selected configuration.

For a project comparing auto transformer vs two winding transformer arrangements, keep that system-level decision separate from the function of this instrument transformer. The LA-10Q monitors or supports protection arrangements around a conductor path; it is not presented as a substitute for a power-transformer topology decision. Likewise, a 3 phase transformer may be part of the wider distribution system, while this product must still be specified for its own primary-current, accuracy, and mounting requirements.

Typical Applications

This through-wall style current transformer can be considered for 10 kV measurement and protection locations where the primary conductor passes through a wall or panel-mounted unit. Typical uses include metering circuits requiring the documented 0.2 accuracy combination with a 10P10 protective output, protection circuits requiring the documented 0.5/10P10 combination, and panel or enclosure installations where the P1/P2 and secondary-terminal interfaces can be coordinated in the design.

It can also support projects where a defined short-circuit withstand is part of the selection review. The exact rating must follow the selected primary-current row and the project engineering calculation. Do not infer a common value across every rating: the table shows a progression, and the 1000 A row has a dynamic stable value of 130. Qualified electrical personnel should validate wiring, insulation coordination, protection settings, commissioning tests, and local requirements before energization.

Documentation and Procurement Notes

The LA-10Q 10kV Through-Wall Current Transformer, Full-Condition Type, 5-1000A Primary is supplied in source material with a model table, dimensions, commercial terms, and a secondary-terminal illustration. Minimum order quantity is listed as 1, payment terms are T/T, and delivery is stated as within 20 days after receipt of payment. Confirm the selected rating, output interpretation, and documentation before ordering.

If the installation scope includes a cable jointing kit, specify that separately and verify compatibility with the cable system and enclosure design; the supplied LA-10Q material does not define a cable-jointing kit as an included component. This distinction helps prevent scope gaps during procurement. For a technical proposal, provide the primary-current selection, required accuracy/protection combination, fault-duty data, panel or wall details, conductor information, and required test or documentation expectations.

In short, this product offers documented 10 kV through-wall construction, multiple primary-current choices, listed accuracy combinations, and a drawing-led mounting reference. The best selection is conditional on the actual electrical and mechanical interfaces. Review the original drawings and project requirements together, then request confirmation for any parameter not expressly stated in the product data.