# Voltage transformer Legrand 042787 — single unit for electrical installations

**URL:** https://aio.lv/en/product--legrand-042787--12105487
**Data updated:** 2026-03-20 09:55 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** Legrand
**Manufacturer code:** 042787
**EAN:** 3245060427870
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 146.49 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 121.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--legrand-042787--12105487

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Legrand 042787 is a voltage transformer supplied as a single unit. Designed for integration into electrical installations, it provides voltage transformation functions required for control circuits, metering or protection devices. Delivered as one piece per pack, it is suitable for electricians and technicians needing a compact transformer matching Legrand systems.

## Long description

Legrand 042787 is a compact voltage transformer supplied as a single unit for integration into electrical installations. Designed to provide reliable voltage transformation for control circuits, metering and protection devices, this transformer fits standard electrical panels and Legrand-compatible systems. The device is intended for installation by qualified electricians and technicians who require a compact transformer that supports accurate secondary voltage for downstream devices.
Advantages
The transformer offers a compact form factor that saves panel space and simplifies installation in confined cabinets. It delivers stable voltage transformation with minimal maintenance requirements and is built to integrate with Legrand electrical components. As a single-unit supply, it reduces the need to match multiple pieces and streamlines procurement for specific projects.
Suitable for
Control circuits in industrial and commercial electrical panels
Auxiliary supply for metering equipment and protection relays
Retrofit or new installations where a compact transformer is required
Key specifications
Function: single-phase voltage transformation for control and auxiliary circuits
Form factor: compact unit suitable for panel mounting
Compatibility: designed for integration with standard Legrand systems and electrical enclosures
Use environment: indoor electrical installations within control cabinets and distribution panels
Maintenance: low-maintenance design intended for professional installation
How to use
Install the transformer into the panel following local electrical codes and wiring diagrams. Connect primary and secondary terminals according to the required input and output voltages for the control or metering device. Ensure correct mounting and secure terminal connections, then verify voltage output with appropriate testing equipment before energizing the downstream circuit. Only qualified personnel should handle installation, testing and commissioning.
Usage recommendations
Verify the required primary and secondary voltages and confirm compatibility with the target devices before installation. Use proper overcurrent protection on the primary side and follow device mounting orientation and ventilation requirements to ensure safe and reliable operation.

## Specifications

### Logistics data

| Feature | Value |
|---|---|
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Voltage transformer Legrand 042787 cost, and is it available for purchase?

The price is 146.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 03.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Voltage transformer Legrand 042787 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Legrand 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 Legrand 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/12105487/67655054_large.webp