# Lumel LCTR 4514400040A51 Current Transformer, 40A/5A, Class 1, Round Aperture

**URL:** https://aio.lv/en/product--lumel-lctr-4514400040a51--12453872
**Data updated:** 2026-05-18 02:43 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Lumel
**Manufacturer code:** LCTR 4514400040A51
**EAN:** 5901769493629
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 28.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 23.96 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lumel-lctr-4514400040a51--12453872

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Lumel LCTR 4514400040A51 is a high-precision current transformer designed for industrial electrical monitoring. Featuring a round aperture, it provides a transformation ratio of 40A/5A and operates with Class 1 accuracy. This device is essential for measuring alternating current in power systems, ensuring reliable data for energy management and protection applications in various electrical installations.

## Long description

The Lumel LCTR 4514400040A51 is a precision-engineered current transformer designed for reliable monitoring of alternating current in industrial electrical systems. Featuring a robust construction with a round aperture, this device facilitates the accurate measurement of electrical currents by stepping down high primary currents to a manageable secondary level of 5A. It is engineered to meet the requirements of modern energy management and protection systems, providing consistent performance in demanding electrical environments.
Advantages
This current transformer offers high measurement accuracy, adhering to Class 1 standards, which ensures that energy data remains precise for billing and monitoring purposes. Its durable design is optimized for long-term stability, minimizing signal distortion and ensuring reliable operation under continuous load. The round aperture configuration simplifies the installation process on existing busbars or cables, making it a versatile solution for various electrical panel configurations.
Suitable for
Industrial power distribution systems
Energy management and monitoring installations
Electrical protection and control circuits
Current measurement in low-voltage switchgear
When it may not be suitable
This device is not intended for use in high-voltage transmission networks or for measuring direct current (DC). It is specifically calibrated for 50/60Hz alternating current systems and may not provide accurate readings if used outside of its specified transformation ratio or frequency range.
Key specifications
Transformation ratio: 40A/5A
Accuracy class: 1
Aperture type: Round
Application: Alternating current measurement
How to use
Installation should be performed by qualified electrical personnel. The primary conductor must be passed through the round aperture of the transformer. Ensure the primary current direction aligns with the markings on the device to maintain correct phase orientation. The secondary terminals should be connected to the measuring instrument or protection relay using appropriately sized wiring, ensuring all connections are tightened to prevent contact resistance.
What to consider before purchase
Verify that the primary current of your system does not exceed 40A
Ensure the secondary input of your measuring device is compatible with a 5A signal
Check the physical space available in the electrical cabinet for the transformer dimensions
Confirm the required accuracy class for your specific application
Usage recommendations
Always ensure the secondary circuit is connected to a load or short-circuited before energizing the primary conductor to prevent the generation of dangerous high voltages.

## FAQ

### How much does the Lumel LCTR 4514400040A51 Current Transformer cost, and is it available for purchase?

The price is 28.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 18 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 16.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Lumel products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Lumel service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12453872/68756397_large.webp