# Three-phase DIN rail energy meter QOLTEC 50978 — 400V, 100A

**URL:** https://aio.lv/en/product--qoltec-50978--12104219
**Data updated:** 2026-03-20 09:54 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** QOLTEC
**Manufacturer code:** 50978
**EAN:** 5901878509785
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 20.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-50978--12104219

## 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

Three-phase DIN-rail energy meter QOLTEC 50978 is designed for monitoring electrical energy in three-phase systems with rated voltage 400V and nominal current 100A. The device mounts on standard DIN rail and provides accurate active energy measurement for residential, commercial or light industrial distribution panels. Suitable for energy accounting, load monitoring and basic consumption analysis.

## Long description

Three-phase DIN rail energy meter QOLTEC 50978 is designed for monitoring active electrical energy in three-phase systems with rated voltage 400V and nominal current 100A. The meter fits standard DIN rails and provides reliable single-tariff active energy measurement for residential, commercial and light industrial distribution panels. The compact modular housing and clear display make it suitable for installation in distribution boards where space and straightforward wiring are required.
Advantages
The device delivers accurate active energy readings for three-phase circuits at up to 400V and 100A, enabling basic consumption analysis and load tracking. Its DIN-rail form factor simplifies installation in standard electrical cabinets. The meter features a clear numeric display and a compact design that reduces space requirements in distribution panels. Built for everyday metering tasks, it requires minimal configuration and offers stable performance under typical supply conditions.
Suitable for
Residential three-phase energy monitoring and billing support
Commercial premises metering and basic consumption control
Light industrial distribution panels for load monitoring
Energy accounting in small substations and service cabinets
Replacement or upgrade of existing DIN-rail energy meters
Key specifications
Supply system: three-phase, rated voltage 400V
Nominal current: 100 A
Mounting type: standard DIN-rail (TS35)
Measured quantity: active energy (single-tariff)
Display type: numeric display for energy values
Housing: compact modular enclosure for distribution panels
How to use
Install the meter on a standard DIN rail inside the distribution board and connect the three phase conductors and neutral according to local wiring standards and safety regulations. Ensure that the nominal current rating matches the circuit protection and load characteristics. After wiring, verify supply presence and read the numeric display to confirm active energy measurement. For safe operation, switch off the supply before connecting or disconnecting the device and follow local electrical codes.
Usage recommendations
Position the meter in an accessible location within the panel for easy reading and periodic inspection. Use proper fusing or circuit breakers sized for a 100A nominal current and ensure connections are tightened to the recommended torque to prevent heating. For accurate long-term accounting, avoid installing the meter near heat sources or in humid environments, and perform periodic inspections according to local regulations.

## FAQ

### How much does the Three-phase energy meter QOLTEC 50978 400V 100A cost, and is it available for purchase?

The price is 24.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 18 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 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/12104219/67639676_large.webp