# Lumel LCTB 5030 Current Transformer, 400A/5A, 50/30mm Busbar Opening

**URL:** https://aio.lv/en/product--lumel-lctb-5030300400a55--12453879
**Data updated:** 2026-05-18 02:43 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Lumel
**Manufacturer code:** LCTB 5030300400A55
**EAN:** 5901769490246
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 28.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 23.96 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lumel-lctb-5030300400a55--12453879

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.99 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The Lumel LCTB 5030 current transformer is designed for precise electrical current measurement in industrial applications. Featuring a 400A/5A transformation ratio and a 50/30mm busbar opening, this device ensures reliable signal conversion for monitoring and protection systems. It is built for durability and accurate performance in demanding electrical environments.

## Long description

The Lumel LCTB 5030 current transformer is a high-precision instrument engineered for accurate electrical current measurement in industrial power systems. With a transformation ratio of 400A/5A and a specialized 50/30mm busbar opening, this device provides reliable signal conversion for various monitoring, control, and protection applications. Its robust construction ensures consistent performance and durability even in demanding electrical environments, making it an essential component for energy management and grid safety.
Advantages
This current transformer offers exceptional measurement accuracy, which is vital for maintaining the stability and efficiency of industrial electrical networks. The design facilitates easy installation onto busbars, reducing downtime during setup. Furthermore, the high-quality materials used in its construction provide excellent resistance to environmental factors, ensuring a long service life and minimal maintenance requirements for critical monitoring systems.
Suitable for
Industrial power distribution monitoring
Energy management and sub-metering systems
Protection relays for electrical circuits
Current measurement in low-voltage switchgear
When it may not be suitable
This device is not intended for high-voltage applications exceeding its specified insulation levels. It is also not suitable for measuring currents outside of its rated 400A range, as this may lead to inaccurate readings or potential damage to the secondary equipment.
Key specifications
Transformation ratio: 400A/5A
Busbar opening dimensions: 50/30mm
Application: Industrial current measurement
Design: Through-hole busbar mounting
How to use
To install the Lumel LCTB 5030, ensure that the primary electrical circuit is de-energized. Pass the busbar through the 50/30mm aperture of the transformer. Secure the device firmly to prevent vibration. Connect the secondary terminals to your measuring instrument or protection relay using appropriate wiring, ensuring that the polarity is correctly observed to maintain measurement accuracy.
What to consider before purchase
Verify that the primary current of your system does not exceed 400A.
Ensure the physical dimensions of your busbar are compatible with the 50/30mm opening.
Confirm that your secondary measuring equipment is calibrated for a 5A input.
Usage recommendations
Always ensure that the secondary circuit of the current transformer is never left open while the primary circuit is energized, as this can generate dangerously high voltages.

## FAQ

### How much does the Lumel LCTB 5030 Current Transformer 400A/5A 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 — 19 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 13.07.2026 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

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