# Relpol RPN-1VFR-A400 3-Phase Monitoring Relay 1P 3(N)400/230V AC 50/60 Hz

**URL:** https://aio.lv/en/product--relpol-864373--12459033
**Data updated:** 2026-05-18 09:28 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Relpol
**Manufacturer code:** 864373
**EAN:** 5900005262791
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 28.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--relpol-864373--12459033

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

The Relpol RPN-1VFR-A400 is a professional 3-phase monitoring relay designed for industrial and electrical automation systems. It features a 1P output and supports 3(N)400/230V AC voltage at 50/60 Hz. This device ensures reliable protection by monitoring phase parameters, preventing faults in electrical installations, and maintaining operational safety in power distribution networks.

## Long description

The Relpol RPN-1VFR-A400 is a high-precision 3-phase monitoring relay engineered for demanding industrial and electrical automation environments. This device is designed to continuously supervise the parameters of a 3-phase power supply, ensuring that voltage levels remain within safe operational limits. By integrating this relay into your electrical distribution network, you gain a robust solution for detecting phase failures, imbalances, or incorrect sequences, thereby protecting sensitive equipment from potential damage caused by unstable power conditions.
Advantages
This monitoring relay offers exceptional reliability and accuracy in detecting electrical anomalies, which is critical for maintaining the longevity of industrial machinery. Its compact design allows for efficient installation in standard control cabinets, while the high-quality internal components ensure consistent performance even in challenging operational conditions. By providing real-time monitoring, the device helps prevent costly downtime and reduces the risk of electrical fires or hardware failure caused by phase-related faults.
Suitable for
Industrial automation and control systems
Power distribution networks in commercial buildings
Protection of 3-phase motors and pumps
Electrical panels requiring phase sequence and loss monitoring
When it may not be suitable
This device is specifically designed for 3-phase systems and will not function correctly in single-phase applications. It is not intended for use in environments with extreme moisture or high levels of conductive dust unless housed in an appropriate protective enclosure.
Key specifications
Rated voltage: 3(N)400/230V AC
Frequency: 50/60 Hz
Output configuration: 1P (1 changeover contact)
Application: 3-phase monitoring
How to use
The relay should be installed by a qualified professional in accordance with local electrical regulations. It is typically mounted on a standard DIN rail within a control panel. Connect the phase lines to the designated input terminals, ensuring that the wiring matches the voltage specifications of the device. Once installed, the relay will automatically begin monitoring the supply. Status indicators on the front panel provide visual confirmation of the current operational state and any detected faults.
What to consider before purchase
Verify that your supply voltage matches the 3(N)400/230V AC requirement.
Ensure the control circuit load is compatible with the 1P output rating.
Confirm that the installation environment meets the necessary IP rating requirements for your specific application.
Usage recommendations
Regularly inspect the terminal connections to ensure they remain tight and free from oxidation. Periodically test the monitoring function during scheduled maintenance to confirm that the relay correctly triggers the protection sequence when simulated faults occur.

## FAQ

### How much does the Relpol RPN-1VFR-A400 3-Phase Monitoring Relay cost, and is it available for purchase?

The price is 34.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 06.07.2026 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. 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 Relpol 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 Relpol 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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