# Eti-Polam NH3 Fuse Link 577A gTr 400kVA 400V WT-3

**URL:** https://aio.lv/en/product--eti-polam-004115408--12466345
**Data updated:** 2026-05-18 09:37 (EEST)
**Category:** Power Sockets
**Manufacturer:** Eti-Polam
**Manufacturer code:** 004115408
**EAN:** 5904161510697
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 44.99 €
**Prices and availability valid until:** 2026-08-14 23:59
**Price without VAT (21%):** 37.18 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--eti-polam-004115408--12466345

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 04.08.2026 | free |
| Pickup points | 07.08.2026 | 1.89 EUR |
| Courier delivery to door | 07.08.2026 | 4.99 EUR |

## Summary description

The Eti-Polam NH3 fuse link is a high-performance electrical protection component designed for transformer protection. Rated at 577A with a gTr characteristic, it is optimized for 400kVA transformers at 400V. This WT-3 size fuse ensures reliable circuit interruption in industrial power distribution systems, providing essential safety and equipment protection against overloads and short circuits in demanding electrical environments.

## Long description

The Eti-Polam NH3 fuse link is a specialized electrical protection device engineered specifically for the reliable safeguarding of distribution transformers. With a rated current of 577A and a gTr characteristic, this component is precisely calibrated to protect 400kVA transformers operating at 400V. Designed in the standard WT-3 size, it serves as a critical safety element in industrial power distribution networks, ensuring that electrical circuits are interrupted effectively during overloads or short-circuit events to prevent damage to expensive infrastructure.
Advantages
This fuse link offers superior performance due to its specific gTr characteristic, which is optimized for the unique thermal and electrical requirements of transformer protection. By providing a precise response to overcurrent conditions, it helps maintain the longevity and operational stability of transformer units. The robust construction of the WT-3 size ensures compatibility with standard industrial fuse bases, facilitating straightforward installation and reliable electrical contact in demanding environments.
Suitable for
Protection of 400kVA distribution transformers
Industrial power distribution systems
Electrical networks operating at 400V
Applications requiring gTr characteristic protection
This fuse link is not suitable for general-purpose circuit protection where a standard gG characteristic is required, as its performance curve is specifically tailored for transformer loads. It should not be used in systems with voltage ratings exceeding 400V or for applications where the transformer capacity significantly deviates from the 400kVA specification.
Key specifications
Rated current: 577A
Characteristic: gTr
Transformer capacity: 400kVA
Rated voltage: 400V
Size: WT-3
To use the Eti-Polam NH3 fuse link, ensure that the power supply is completely disconnected from the fuse base before installation. Insert the fuse link into the appropriate WT-3 size fuse base, ensuring that the contact blades are fully seated and secure. Verify that the electrical connections are tight and that the surrounding environment is free of moisture or conductive debris before restoring power to the system.
What to consider before purchase
Verify the transformer capacity matches the 400kVA rating
Ensure the fuse base is compatible with the WT-3 size
Confirm the system voltage is 400V
Check that the gTr characteristic is appropriate for your specific protection requirements
Usage recommendations: Always replace fuse links with identical specifications to maintain the integrity of the protection scheme. Regular inspection of the fuse base contacts is recommended to prevent overheating and ensure optimal performance.

## FAQ

### How much does the Eti-Polam NH3 577A gTr 400kVA Fuse Link cost, and is it available for purchase?

The price is 44.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 16 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 04.08.2026 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. 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 Eti-Polam 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 Eti-Polam 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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