Dispositivi di protezione contro le sovratensioni (SPD)
Compare VIOX surge protective devices for AC, DC and solar PV systems by system voltage, pole arrangement and published product characteristics.
Transient protectionLimits surge overvoltage
Pole formatsSingle or multi-pole
AC, DC and PVMatch the system
Discharge ratingConferma tramite modello
What is a surge protective device?
An SPD limits transient overvoltage by diverting surge current away from protected equipment. It is coordinated with the system voltage, earthing arrangement, installation point and upstream protection.
An SPD is not a substitute for overload, short-circuit or sustained overvoltage protection. Device type, maximum continuous operating voltage, discharge-current ratings, pole arrangement and AC or DC suitability must be verified.
SPD Series Overview
Compare published VIOX models using facts already available in product data.
VIOX VSP1-C40
Surge protective device- Formato polo
- Single-pole
- Product form
- Pluggable
VIOX VSP1-C40
Surge protective device- Formato polo
- Multi-pole
- Product form
- Pluggable
VIOX VSP1-C40
Surge protective device- Formato polo
- Multi-pole
- Product form
- Pluggable
VIOX VSP1-C40PV
Surge protective device- Published voltage
- 1000V
- Formato polo
- Single-pole
- Product form
- Pluggable
VIOX VSP1-C40PV
Surge protective device- Published voltage
- 600V
- Formato polo
- Single-pole
- Product form
- Pluggable
VIOX VSP1-C40PV
Surge protective device- Published voltage
- 1000V
- Formato polo
- Multi-pole
- Product form
- Pluggable
VIOX VSP1-C40PV
Surge protective device- Published voltage
- 1500V
- Formato polo
- Multi-pole
- Product form
- Pluggable
VIOX VSP1-C40PV
Surge protective device- Published voltage
- 600V
- Formato polo
- Multi-pole
- Product form
- Pluggable
How to choose an SPD
Coordinate the SPD with the electrical system, installation location and backup protection.
AC, DC or solar PV system
Use a device explicitly rated for the circuit type, voltage and earthing arrangement.
SPD type and installation point
Coordinate Type 1, Type 2 or Type 3 protection where required by the system design.
Uc, In, Imax or Iimp ratings
Verify the continuous voltage and surge-current characteristics in the model datasheet.
Pole arrangement and backup protection
Match the wiring configuration and coordinate the specified upstream protective device.
Coordinated surge protection
The required SPD type depends on the installation architecture. Not every VIOX series is available in every class or voltage.
Compare published SPD series
Blank cells mean the value is not available in the current product summary. Open the model page or request its datasheet before specification.
| Serie | Sistema | Published voltage | Formato polo | Product form |
|---|---|---|---|---|
| VIOX VSP1-C40 | — | — | Single-pole | Single-pole |
| VIOX VSP1-C40 | — | — | Multi-pole | Multi-pole |
| VIOX VSP1-C40 | — | — | Multi-pole | Multi-pole |
| VIOX VSP1-C40PV | — | 1000V | Single-pole | Single-pole |
| VIOX VSP1-C40PV | — | 600V | Single-pole | Single-pole |
| VIOX VSP1-C40PV | — | 1000V | Multi-pole | Multi-pole |
| VIOX VSP1-C40PV | — | 1500V | Multi-pole | Multi-pole |
| VIOX VSP1-C40PV | — | 600V | Multi-pole | Multi-pole |
SPD Applications
Typical environments where the exact product characteristics must be verified.
Edifici residenziali
Distribution-board surge protection coordinated with the residential supply system.
Automazione industriale
Surge protection for control panels, machines and sensitive industrial electronics.
Solare e accumulo di energia
DC and AC SPDs selected around PV string, inverter and storage-system voltages.
SPD Knowledge & Selection Guides
Tutti gli articoli
SPD Selection Questions
Quick answers for preliminary product-family comparison before detailed circuit verification.
What does an SPD protect against?
An SPD is designed to limit transient overvoltage caused by events such as lightning effects or switching. It does not replace overcurrent or sustained overvoltage protection.
What is the difference between Type 1, Type 2 and Type 3 SPDs?
The types relate to different test duties and installation positions within a coordinated surge-protection system. The required combination depends on the electrical architecture and applicable standards.
Can an AC SPD be used on a solar DC circuit?
No, unless the product documentation explicitly approves that DC voltage and configuration. Solar PV circuits require SPDs selected for their DC operating conditions and polarity arrangement.
Which SPD ratings should be checked?
Check system type, maximum continuous operating voltage, nominal and maximum discharge current or impulse current where applicable, voltage protection level, poles and backup protection.
Dove deve essere installato un SPD?
Installation position depends on the system design and protection coordination. Keep connections appropriately arranged and follow the product instructions and applicable installation rules.
Need the Right SPD?
Let’s Coordinate the Protection.
Send the system type, AC or DC voltage, pole arrangement, installation position, quantity and target market. VIOX will help identify the relevant published series.
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