# PCE MLU1-063-4V-9121 63A Mains-Generator Changeover Switch

**URL:** https://aio.lv/en/product--pce-44703--12446155
**Data updated:** 2026-05-18 02:53 (EEST)
**Category:** Other goods
**Manufacturer:** PCE
**Manufacturer code:** 44703
**EAN:** 5902082098201
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The PCE MLU1-063-4V-9121 is a professional 63A mains-generator changeover switch designed for reliable power source switching. This 4-pole device ensures safe transition between the main electrical grid and an auxiliary generator. It is built for industrial and residential electrical installations, providing robust performance and durability for critical power management applications.

## Long description

The PCE MLU1-063-4V-9121 is a professional 63A mains-generator changeover switch engineered to provide a secure and reliable transition between two independent power sources. This 4-pole device is essential for managing electrical loads in environments where a backup power supply, such as a generator, must be integrated into the existing grid infrastructure. Its robust construction ensures consistent performance and safety during critical power switching operations in both industrial and residential settings.
Advantages
This changeover switch offers high operational reliability by preventing the simultaneous connection of the main grid and the generator, which protects both the electrical installation and the connected equipment. The 4-pole design allows for the complete disconnection of all phases and the neutral conductor, ensuring full electrical isolation. Built with high-quality materials, the unit is designed to withstand the rigors of frequent switching and long-term use in demanding electrical environments.
Suitable for
Residential backup power systems
Industrial facility power management
Commercial buildings requiring emergency power integration
Agricultural sites with generator-dependent equipment
When it may not be suitable
This device is not intended for use in high-voltage distribution networks beyond its rated current capacity. It should not be installed in environments with extreme moisture or corrosive atmospheres without appropriate protective enclosure housing.
Key specifications
Rated current: 63A
Number of poles: 4
Function: Mains-generator changeover
Application: Power source switching
How to use
The switch should be installed by a qualified electrician within a standard distribution board or a dedicated enclosure. Once installed, the operator can manually toggle between the grid and generator positions to select the desired power source. Ensure that the load is disconnected or minimized before operating the switch to prevent arcing and extend the lifespan of the internal contacts.
What to consider before purchase
Verify that the 63A rating is sufficient for your total electrical load
Ensure the 4-pole configuration matches your specific wiring requirements
Confirm compatibility with your existing distribution board mounting standards
Usage recommendations
Regularly inspect the switch for any signs of wear or loose connections. It is recommended to perform a test switch-over periodically to ensure the mechanism remains smooth and responsive.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 PCE 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 PCE 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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