1. Uvod
This manual provides essential information for the safe and effective installation, operation, and maintenance of the OBO Bettermann V25-B+C/3+NPE FS Surge Protection Device. Please read these instructions carefully before installation and keep them for future reference.
The V25-B+C/3+NPE FS is designed to protect electrical installations from transient overvoltages (surges) caused by lightning strikes or switching operations. It is a complete unit, pre-mounted and ready for connection, suitable for various TN and TT systems.
2. Proizvod je gotovview
The OBO Bettermann V25-B+C/3+NPE FS is a combined lightning current and surge arrester, featuring an encapsulated non-extinguishing zinc oxide varistor. It is designed for use in standard distributor housings.
- Kompletna jedinica: Consists of a cover and base, pre-mounted and ready for connection.
- Multi-connection Terminals: Equipped with a new Multibase base for versatile wiring.
- Kompatibilnost sistema: Suitable for both TN and TT earthing systems.
- Daljinska signalizacija: Includes a potential-free normally open (NO) contact for function monitoring.
- Visual Function Display: Features a plug-in arrestor with a dynamic cut-off unit and a visual indicator for operational status.

Slika 1: Prednja strana view of the OBO Bettermann V25-B+C/3+NPE FS Surge Protection Device, showing the four modules (three orange, one blue) and connection terminals.

Slika 2: Pod uglom view of the surge protection device, highlighting the modular design and branding.
3. Sigurnosne informacije
UPOZORENJE: Installation and maintenance must only be performed by qualified electricians in accordance with national wiring regulations and safety standards. Failure to comply may result in serious injury or damage to equipment.
- Uvijek isključite napajanje prije instaliranja ili servisiranja uređaja.
- Osigurajte da su pravilno izvedeni priključci za uzemljenje.
- Ne koristite uređaj ako izgleda oštećeno.
- Pridržavajte se svih lokalnih i nacionalnih električnih propisa.
4. Postavljanje i instalacija
The V25-B+C/3+NPE FS is designed for easy installation within standard electrical distribution housings. It features a plug-in design for the arrestor modules.
4.1 Montaža
- Ensure the main power supply to the installation is switched off and locked out.
- Mount the device onto a DIN rail within the distribution housing. The device is designed for secure rail mounting.

Slika 3: Od vrha prema dolje view illustrating the connection terminals for wiring.
4.2 Ožičenje
Connect the device according to the wiring diagram provided with the product and national electrical codes. The Multibase base provides multi-connection terminals for flexible wiring.
- Connect the phase conductors (L1, L2, L3) to the respective orange modules.
- Connect the Neutral (N) and Protective Earth (PE) conductors to the blue N-PE module.
- Uvjerite se da su svi spojevi čvrsti i sigurni.

Slika 4: Dno view of the device, showing the base structure and mounting mechanism for a DIN rail.
4.3 Remote Signalling Contact
The device includes a potential-free normally open (NO) contact for remote function monitoring. Connect this contact to a suitable monitoring system if remote status indication is required.
5. Uputstvo za upotrebu
Once correctly installed and wired, the OBO Bettermann V25-B+C/3+NPE FS operates automatically to protect against surges. It does not require manual intervention during normal operation.
5.1 Visual Function Display
Each plug-in arrestor module is equipped with a visual function display. This indicator provides immediate feedback on the operational status of the module.
- Zeleni indikator: The module is operational and providing surge protection.
- crveni indikator: The module has responded to a surge event and is no longer operational. It requires replacement.

Slika 5: Krupni plan view of the individual modules, highlighting the visual status indicators (green for operational, red for failed).
6. Održavanje
The OBO Bettermann V25-B+C/3+NPE FS is largely maintenance-free. However, periodic checks are recommended to ensure continued protection.
- Vizuelni pregled: Regularly check the visual function display on each module. If any indicator is red, the corresponding module needs replacement.
- Integritet veze: Povremeno provjeravajte spojeve ožičenja na čvrstoću i znakove korozije.
- Zamjena modula: To replace a failed module (indicated by a red display), switch off the power supply, carefully pull out the faulty plug-in module, and insert a new, identical module. Ensure the new module clicks securely into place.

Slika 6: Pod uglom view demonstrating the plug-in nature of the individual surge protection modules.
7. Otkrivanje problema
This section addresses common issues and their resolutions.
7.1 Visual Indicator is Red
- problem: One or more modules show a red indicator.
- Uzrok: The module has absorbed a significant surge and is no longer functional.
- Rješenje: Replace the affected plug-in module(s) as described in the Maintenance section (Section 6).
7.2 Remote Signalling Not Working
- problem: The remote monitoring system does not receive signals from the device.
- Uzrok: Incorrect wiring of the remote signalling contact, or a fault in the monitoring system.
- Rješenje: Check the wiring of the potential-free NO contact. Verify the functionality of the remote monitoring system independently.
8. Specifikacije
| Feature | Detalj |
|---|---|
| Brand | OBO Betterman |
| Broj modela | V25-B+C/3+NPE FS |
| Tip | Combined Lightning Current and Surge Arrester (Type 1+2) |
| Kompatibilnost sistema | TN and TT systems |
| Tip odvodnika | Encapsulated non-extinguishing zinc oxide varistor |
| Posebna karakteristika | Easy to install, Visual function display, Remote signalling |
| Dimenzije proizvoda (DxŠxV) | 6 x 7 x 10 centimetara |
| Materijal | Cink |
| Remote Signalling | Potential-free NO contact |
9. Garancija i podrška
For warranty information and technical support, please refer to the official OBO Bettermann webstranicu ili kontaktirajte lokalnog distributera. Sačuvajte račun za kupovinu u slučaju reklamacije.





