# Three-phase automatic voltage regulator KEMOT PROavr-20k 20 kVA 400 V

**URL:** https://aio.lv/en/product--kemot-urz3437-20--11082002
**Data updated:** 2026-03-02 15:43 (EET)
**Category:** Voltage Stabilizers
**Manufacturer:** KEMOT
**Manufacturer code:** URZ3437-20
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 760.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 628.92 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kemot-urz3437-20--11082002

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Courier delivery to door | 08.07.2026 | 53.99 EUR |

## Summary description

Three-phase automatic voltage regulator KEMOT PROavr-20k with 20 kVA rated power and 400 V nominal voltage. Designed to stabilize three-phase supply for industrial and commercial equipment, it maintains voltage within set limits, protects connected devices from over- and undervoltage, and supports continuous operation of motors and sensitive electronics. Suitable for factories, workshops and building installations.

## Long description

Three-phase automatic voltage regulator KEMOT PROavr-20k 20 kVA 400 V is designed to stabilize three-phase mains and provide a steady 230 V output per phase with high accuracy. The stabiliser protects connected devices from under- and overvoltage, overloads, overheating and short circuits. It uses a toroidal transformer and servo motor technology to maintain output voltage within 230 V ±3% in single-phase operation and to restore and balance phases in three-phase mode. The unit includes a bypass switch, a selectable DELAY start-up timer and mounted wheels for easier relocation.
Advantages
The KEMOT PROavr-20k provides automatic regulation with up to ±3% output accuracy, phase-by-phase monitoring in three-phase mode, and protection functions against overvoltage, undervoltage, overload, overheating and short circuit. A toroidal transformer and servo-based adjustment ensure stable performance. The device has a bypass switch for maintenance or alternative feeding and a DELAY switch-on timer (6–180 s) to protect equipment with high inrush currents. Four sturdy wheels simplify transport and positioning.
Suitable for
Industrial and commercial three-phase equipment in factories and workshops
Office equipment such as computers, monitors, printers and cash registers
Household appliances with significant power draw: induction hobs, microwave ovens, refrigerators and freezers
Audio/video systems including TVs, speakers and mini-towers
Central heating pumps and stoves, and electrical generators
Key specifications
Model: KEMOT PROavr-20k (MPN URZ3437-20)
Rated power: 20 kVA
Nominal system voltage: 400 V (three-phase)
Output regulation accuracy (single-phase): 230 V ±3%
Delay timer: adjustable 6–180 seconds
Core type: toroidal transformer
Protection: overvoltage, undervoltage, overload, overheating, short-circuit, phase error indication
Features: servo motor regulation, bypass switch, wheels for transport
How to use
Install the stabiliser according to local electrical regulations and connect it to the three-phase supply and the load following the wiring diagram supplied by the manufacturer. Set the DELAY timer to an appropriate value (6–180 s) when protecting equipment with high inrush currents. Use the bypass switch when you need to isolate or bypass the stabiliser for maintenance or to feed the system from an external source. Monitor the front panel indicators for phase errors or protection events and address any faults before restoring normal operation.
Usage recommendations
Place the stabiliser on a flat, ventilated surface and ensure adequate clearance around the unit for cooling. Regularly inspect connections and ventilation paths, and keep the unit free of dust. Use the DELAY function when connecting motors or appliances with high starting currents. Do not operate the device with a missing or faulty phase in three-phase mode—if a phase error is indicated, follow the manufacturer's troubleshooting instructions before returning to service.

## FAQ

### How much does the KEMOT PROavr-20k three-phase voltage regulator 20 kVA cost, and is it available for purchase?

The price is 760.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 128 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, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can KEMOT PROavr-20k three-phase voltage regulator 20 kVA 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 KEMOT 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 KEMOT 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/11082002/65883595_large.webp