# Fire protection switch DZIEW WF-1s 911440 for photovoltaic systems, surface-mounted, 2 current circuits, 12A, NC-NO

**URL:** https://aio.lv/en/product--dziew-911440--12107382
**Data updated:** 2026-03-20 09:58 (EET)
**Category:** Solar Panel Accessories
**Manufacturer:** DZIEW
**Manufacturer code:** 911440
**EAN:** 5906197483891
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 43.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 36.36 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--dziew-911440--12107382

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

DZIEW WF-1s (model 911440) is a surface-mounted fire protection switch designed for photovoltaic installations. It provides two independent current circuits with 12A rated current and NC/NO contact configuration for automatic disconnection. Intended to isolate PV strings or arrays in fire events or emergency shutdowns, it supports safe system shutdown and integration with safety control circuits.

## Long description

DZIEW WF-1s surface-mounted fire protection switch (model 911440) is designed for photovoltaic systems to provide safe, fast isolation of PV strings or arrays during fire incidents and emergency shutdowns. The device offers two independent current circuits with a 12 A rated current and NC/NO contact configuration for integration with automatic safety control systems. Built for external mounting, it allows straightforward connection to existing PV wiring and control loops to ensure a reliable means of disconnecting DC sources from inverter or array circuits.
Advantages
The switch combines dual-circuit switching and changeover (NC/NO) contacts, enabling flexible integration into fire alarm and inverter shutdown schemes while keeping installation simple due to its surface-mounted design. With a 12 A rated current per circuit, it is suitable for typical string-level isolation in residential and small commercial PV installations. The enclosure design supports safe handling and rapid connection during routine service or emergency operations.
Suitable for
Photovoltaic string isolation for residential PV arrays
Emergency shutdown integration with fire detection and alarm systems
Disconnecting specific DC circuits during maintenance
Surface-mounted installations where wall- or structure-mounted devices are required
Key specifications
Configuration: 2 independent current circuits with NC/NO contact arrangement
Rated current: 12 A per circuit
Mounting type: surface-mounted enclosure suitable for external installation
Contact function: changeover (normally closed / normally open) for control and signaling
Application: DC isolation for photovoltaic systems and safety control circuits
How to use
Mount the unit on a suitable flat surface near the PV array or within the DC combiner area, following local electrical codes and PV installation standards. Connect PV string conductors to the designated circuit terminals, and wire the NC/NO contacts to the fire alarm control panel or inverter shutdown input according to the system wiring diagram. Verify polarity and tightness of connections, then perform functional tests to confirm the switch operates correctly in both normal and triggered states. Regular inspection and testing are recommended as part of PV system maintenance.
Usage recommendations
Install and commission the switch only by qualified personnel; ensure compatibility with the overall system voltage and inverter protective requirements. Follow manufacturer and local regulations for spacing, wiring, and protective measures to maintain safe operation and reliable emergency disconnection.

## FAQ

### How much does the Fire protection switch DZIEW WF-1s 911440 cost, and is it available for purchase?

The price is 43.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 26 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. 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 DZIEW 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 DZIEW 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/12107382/67643799_large.webp