# FF SZR-279 Automatic Transfer Switch Controller for 3 and 4-Wire Networks 24-230V AC

**URL:** https://aio.lv/en/product--ff-szr-279--12454377
**Data updated:** 2026-05-18 02:52 (EEST)
**Category:** Control Systems
**Manufacturer:** FF
**Manufacturer code:** SZR-279
**EAN:** 5902431671529
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 384.99 €
**Prices and availability valid until:** 2026-08-17 23:59
**Price without VAT (21%):** 318.17 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ff-szr-279--12454377

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.79 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

The FF SZR-279 is an automatic transfer switch controller designed for monitoring and managing power supply in 3- and 4-wire electrical networks. Operating within a voltage range of 24-230V AC, this device ensures reliable switching between primary and backup power sources. It is ideal for industrial and residential electrical systems requiring continuous power availability and automated phase monitoring.

## Long description

The FF SZR-279 is a professional automatic transfer switch controller engineered to monitor and manage power supply stability in both 3-wire and 4-wire electrical networks. Operating across a versatile voltage range of 24-230V AC, this device provides a reliable solution for automated switching between primary and backup power sources. It is designed to ensure seamless continuity of electrical supply, making it an essential component for systems where power reliability is critical.
Advantages
The controller offers high precision in phase monitoring, ensuring that the system reacts instantly to voltage drops or power failures. Its robust design allows for integration into diverse electrical environments, providing a flexible solution for both industrial and residential applications. By automating the transition between power sources, it minimizes downtime and protects sensitive equipment from power instability. The device is built for durability and consistent performance under varying load conditions, simplifying the management of complex power distribution setups.
Suitable for
Industrial power distribution systems
Residential backup power management
Data centers and server rooms
Emergency lighting and security systems
Automated generator switching
When it may not be suitable
This controller is not intended for use in high-voltage power grids or direct current (DC) systems, as it is specifically calibrated for AC networks within the 24-230V range. It may also not be suitable for applications requiring complex communication protocols or remote software integration beyond standard relay switching.
Key specifications
Operating voltage: 24-230V AC
Network compatibility: 3-wire and 4-wire systems
Function: Automatic transfer switch control
Monitoring: Phase and voltage monitoring
How to use
Installation should be performed by a qualified electrician in accordance with local safety regulations. The device is typically mounted on a standard DIN rail within an electrical distribution board. Connect the primary and backup power lines to the designated input terminals, ensuring that the wiring configuration matches the 3-wire or 4-wire setup of your specific network. Once connected, the controller monitors the incoming voltage levels and automatically triggers the switching mechanism when the primary source falls outside the defined parameters.
What to consider before purchase
Verify that your network voltage is within the 24-230V AC range
Confirm whether your system is a 3-wire or 4-wire configuration
Ensure sufficient space is available on the DIN rail for mounting
Check compatibility with your existing generator or backup power supply
Usage recommendations
Regularly inspect the terminal connections to ensure they remain tight and free from oxidation. Periodically test the automatic switching function during scheduled maintenance to confirm that the backup power source engages correctly when the primary supply is simulated as disconnected.

## FAQ

### How much does the FF SZR-279 Automatic Transfer Switch Controller cost, and is it available for purchase?

The price is 384.99 € (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 03.08.2026 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 FF SZR-279 Automatic Transfer Switch Controller 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 FF 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 FF 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/12454377/68756825_large.webp