# Qoltec 51907 Three-Phase Voltage Stabilizer AVR Multiprotection 15kVA Servo Motor LCD Expert Line

**URL:** https://aio.lv/en/product--qoltec-51907--12649777
**Data updated:** 2026-10-19 18:36 (EEST)
**Category:** Voltage Stabilizers
**Manufacturer:** QOLTEC
**Manufacturer code:** 51907
**EAN:** 5901878519074
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 900.49 €
**Prices and availability valid until:** 2026-11-19 23:59
**Price without VAT (21%):** 744.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-51907--12649777

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.10.2026 | free |
| Courier delivery to door | 02.11.2026 | 53.99 EUR |

## Summary description

The Qoltec 51907 is a reliable three-phase voltage stabilizer featuring AVR Multiprotection technology with a 15kVA capacity and high accuracy of ±3%. Equipped with a servo motor 3F system and an intuitive LCD screen, this Expert Line device ensures a stable power supply and protects sensitive electrical equipment from voltage fluctuations in demanding industrial and commercial applications.

## Long description

The Qoltec 51907 Three-Phase Voltage Stabilizer AVR Multiprotection 15kVA Servo Motor LCD Expert Line is engineered to provide a consistent and reliable power supply for demanding industrial and commercial environments. By effectively regulating unstable grid voltages, this device protects sensitive electrical equipment from unexpected power surges, drops, and fluctuations. Utilizing advanced servo motor 3F technology combined with comprehensive AVR Multiprotection, it ensures optimal operational safety and extends the lifespan of connected machinery and electronics.
Advantages
This three-phase voltage stabilizer delivers exceptional voltage regulation accuracy of plus or minus 3 percent, maintaining steady output levels even when input power fluctuates significantly. The integrated servo motor system adjusts voltage smoothly and continuously, avoiding abrupt switches that could disrupt sensitive devices. An intuitive LCD screen allows users to monitor real-time operating parameters effortlessly. Built with robust components from the Expert Line series, the unit is designed for continuous operation in environments where stable electrical power is critical for daily productivity.
Suitable for
Industrial machinery and automated production lines
Commercial office buildings with sensitive IT and networking infrastructure
Medical facilities requiring uninterrupted and stable power for diagnostic devices
Telecommunication systems and server rooms
Large household or workshop installations with high power demands
When it may not be suitable
This stabilizer may not be appropriate for single-phase electrical systems, as it is specifically built for three-phase applications. It is also generally unnecessary for environments with an already stable grid supply that rarely experiences voltage deviations outside normal operational thresholds.
Key specifications
Three-phase voltage stabilizer with servo motor 3F system
Capacity of 15kVA
Voltage regulation accuracy of plus or minus 3 percent
Equipped with an intuitive LCD screen for real-time monitoring
Integrated AVR Multiprotection technology
Belonging to the Expert Line product series
How to use
Installation and connection of the device should be performed by a qualified electrician in accordance with local electrical safety regulations and guidelines. Ensure that the total power consumption of the connected equipment does not exceed the 15kVA capacity of the stabilizer. Once properly wired to the three-phase power network and load, power on the unit. The integrated LCD screen will display current operational parameters, allowing you to monitor the input and output status continuously during use.
What to consider before purchase
Verify that your electrical installation requires a three-phase power solution
Check that the 15kVA capacity fully covers the combined load of your equipment
Ensure adequate physical space and proper ventilation for installation
Confirm that installation will be handled by a certified professional
Usage recommendations: Regularly inspect the connections and monitor the LCD display to ensure the stabilizer operates within normal parameters. Avoid placing the unit in damp, dusty, or poorly ventilated locations to maintain optimal performance and longevity.

## FAQ

### How much does the Qoltec 51907 Three-Phase Voltage Stabilizer 15kVA cost, and is it available for purchase?

The price is 900.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 28.10.2026 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, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Qoltec 51907 Three-Phase Voltage Stabilizer 15kVA 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 QOLTEC 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 QOLTEC 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/12649777/69823164_large.webp