# Lumel LCTB 5030 Current Transformer, 250A/5A, Class 0.5, Busbar Aperture 50/30mm

**URL:** https://aio.lv/en/product--lumel-lctb-5030500250a55--12465031
**Data updated:** 2026-05-18 09:30 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Lumel
**Manufacturer code:** LCTB 5030500250A55
**EAN:** 5901769493490
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 42.49 €
**Prices and availability valid until:** 2026-08-06 23:59
**Price without VAT (21%):** 35.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lumel-lctb-5030500250a55--12465031

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.07.2026 | free |
| Pickup points | 29.07.2026 | 1.89 EUR |
| Courier delivery to door | 29.07.2026 | 4.99 EUR |

## Summary description

The Lumel LCTB 5030 current transformer is a high-precision measuring device designed for electrical power systems. It features a 250A/5A transformation ratio and accuracy class 0.5. Equipped with a 50/30mm busbar aperture, this transformer is ideal for industrial monitoring and energy management applications, ensuring reliable current measurement and signal conversion for secondary monitoring equipment.

## Long description

The Lumel LCTB 5030 current transformer is a precision-engineered device designed for accurate current measurement in electrical power systems. With a transformation ratio of 250A/5A and an accuracy class of 0.5, it provides reliable signal conversion for secondary monitoring and control equipment. The unit is built to withstand industrial environments, ensuring consistent performance in energy management and power distribution networks.
Advantages
This current transformer offers high measurement accuracy, which is essential for precise energy billing and system monitoring. Its robust construction ensures long-term durability and stability under varying load conditions. The design facilitates easy installation on busbars, reducing downtime during integration into existing electrical panels. By converting high primary currents into manageable secondary signals, it protects sensitive measuring instruments while maintaining high data integrity.
Suitable for
Industrial energy monitoring systems
Power distribution panels
Electrical load management
Secondary current measurement for meters and relays
This device is not suitable for high-voltage applications exceeding its rated insulation levels. It should not be used in environments with extreme moisture or corrosive gases that could compromise the integrity of the internal windings.
Key specifications
Transformation ratio: 250A/5A
Accuracy class: 0.5
Busbar aperture dimensions: 50/30mm
Application: Low voltage electrical systems
How to use
The transformer is designed for mounting directly onto a busbar. Ensure the primary conductor passes through the 50/30mm aperture. Connect the secondary terminals to your measuring device or relay using appropriate wiring. Verify that all connections are secure and that the polarity is correct before energizing the circuit. Always ensure the secondary circuit is closed or shorted before current flows through the primary conductor to prevent dangerous voltage build-up.
What to consider before purchase
Verify the primary current rating matches your specific application requirements.
Ensure the busbar dimensions are compatible with the 50/30mm aperture.
Check that the accuracy class meets your regulatory or operational standards.
Usage recommendations
Always ensure the secondary terminals are connected to a load or short-circuited during operation to prevent high-voltage hazards. Regular inspection of connections is recommended to maintain measurement accuracy.

## FAQ

### How much does the Lumel LCTB 5030 Current Transformer 250A/5A cost, and is it available for purchase?

The price is 42.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 24.07.2026 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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