Protezione da sovratensione ABB serie OVR BT2 (Scaricatore di fulmini)

Brand and Model: ABB OVR BT2 series, specific model 40-440C (3P+N configuration, i.e., three-phase four-wire system).

Funzione fondamentale: Used to discharge high-amplitude lightning currents, protecting electrical equipment from overvoltage damage. Suitable for lightning protection systems in civil and industrial buildings.

Parametri tecnici chiave:

Tensione nominale (Uc): 440V, suitable for three-phase AC circuits.

Rated Discharge Current (In): 40IL (8/20forma d'onda μs), withstands high-amplitude lightning current impacts.

Corrente di scarica massima (Imax): 80IL (8/20forma d'onda μs), possesses strong surge discharge capability.

Tempo di risposta: ≤25ns, enables rapid response to surge voltage, reducing the risk of equipment damage.

Corrente di dispersione: <15UN, meets lightning protection equipment safety standards.

Grado di protezione: IP20, suitable for indoor installation environments.

Caratteristiche del prodotto

Integrated Design: The SPD body and dedicated backup protection device (SSD) are integrated into one unit, deeply merging for enhanced protection reliability.

Safety Protection Mechanism: In the event of a short-circuit fault in the SPD, the POD quickly cuts off the power supply; when the SPD ages and leakage current increases, it rapidly cuts off the power frequency current to prevent high-temperature fires.

Compatibilità: Supports use with conventional circuit breakers and fuses, adaptable to various power distribution systems.

Scenari applicabili

Widely used in civil buildings (such as residences and office buildings), industrial facilities (such as factories and data centers), communication base stations, new energy power plants, and other places requiring lightning protection, especially suitable for equipment with high power supply stability requirements (such as servers and precision instruments). Recommended surge protectors with similar functions to the ABB OVR BT2 series, covering different brands and core features:

1. Siemens Surge Protectors

As a leading global brand in the electrical field, Siemens surge protectors are renowned for their advanced technology and high stability. They are widely used in industrial and commercial scenarios, adaptable to various power distribution systems, and compatible with conventional circuit breakers and fuses. Their protection performance is comparable to the ABB OVR BT2 series.

2. Schneider Electric Surge Protectors

Schneider products are characterized by high efficiency, safety, and reliability. They support intelligent integration and automated management, and are suitable for locations with high power supply stability requirements (such as data centers and precision instruments). Their short-circuit breaking capacity and aging protection mechanisms are similar in function to the ABB OVR BT2 series.

3. Other Models in the ABB OVR T2 Series

OVR T2 40-440 PTS QS: Rated discharge current 40kA (8/20μs), voltage 440V, 3P+N configuration, supports fast interruption of short-circuit current and aging leakage current. Technical parameters are similar to the OVR BT2 series, price approximately 402-766 RMB.

OVR T2-T3 20-440 PTS QS: Suitable for T2-T3 level protection, response time ≤25ns, suitable for civil buildings and industrial facilities, with integrated protection design.

4. Delixi Surge Protectors

A well-known domestic brand, characterized by high cost-performance. Products comply with GB18802.1 standards, covering multiple scenarios such as power supply and signal surge protection. Suitable for civil buildings with limited budgets (such as residential and office buildings), performance meets conventional surge protection requirements.

Raccomandazioni per la selezione:

Industrial/High-end Scenarios: Prioritize Siemens and Schneider Electric, focusing on intelligence and system compatibility;

Cost-Effective Options: Delixi or other models in the ABB OVR T2 series, balancing performance and cost;

Parameter Matching: Focus on rated voltage (Uc), discharge current (In/Imax), and protection level to ensure compatibility with the power distribution system.

Selecting a suitable surge protector (SPD) requires considering the protection level, parametri fondamentali, and application scenario.

1. Determine the Protection Level and Installation Location

Surge protection requires tiered configuration, with different protection requirements for different locations:

Livello 1 Protezione (Main Distribution Cabinet, Incoming Line): Protects against direct lightning strikes, requiring high-energy impact. Recommended maximum discharge current (Imax) ≥ 80kA, lightning impulse current (Iimp, 10/350forma d'onda μs) ≥ 12.5kA (single pole). Suitable for power distribution rooms and main incoming lines of buildings.

Livello 2 Protezione (Distribution Cabinet): Absorbs residual surges from Level 1 protezione. Recommended Imax ≥ 40kA. Suitable for multi-story building unit distribution boxes and industrial plant junction boxes.

Livello 3 Protezione (Before Terminal Equipment, such as service boxes and precision equipment): Protects sensitive equipment. Recommended Imax ≥ 20kA, nominal discharge current (In) ≥ 10kA. Suitable for homes, uffici, server, medical equipment, and other terminals.

1. Corrispondenza dei parametri principali

Corrente di scarica nominale (In): The 8/20μs waveform current that the SPD can stably discharge. ≥ 10kA for civil buildings, ≥ 20kA for industrial/rail transit, and ≥ 5kA for precision scenarios such as communication equipment rooms.

Corrente di scarica massima (Imax): The maximum current (8/20μs) that the SPD can withstand under extreme conditions. Must be selected according to the protection level (per esempio., Livello 1 ≥ 80kA, Livello 3 ≥ 20kA).

Livello di protezione della tensione (Su): The residual voltage during discharge. The lower the voltage, the safer the equipment. 220/380V systems require Up ≤ 1.5kV, while precision equipment (such as medical CT scanners) requires ≤ 1.0kV.

Maimum continuous operating voltage (Uc): The AC voltage it can withstand long-term; single-phase 220V lines ≥ 275V, three-phase 380V lines ≥ 385V.

Response time (tA): Must be ≤ 25ns to ensure rapid response.

III. Applicable Scenarios and Equipment Types

Civil buildings (residential, edifici per uffici): Livello 3 protezione, terminal selection In ≥ 10kA, Imax ≥ 20kA, Uc ≥ 275V (monofase) or 385V (trifase).

Industrial/High-risk locations (airports, wind farms): Livello 1 protection requires Iimp ≥ 25kA, Livello 2 Imax ≥ 40kA, with backup protectors (such as circuit breakers and fuses) to enhance safety.

Attrezzature di precisione (server, medical instruments): Emphasis on low residual voltage (Up≤1.0kV), In≥5kA, response time≤10ns.

1. Precauzioni

Matching with Power Distribution System: Select 3P+N model for three-phase circuits, and 1P+N for single-phase circuits, ensuring Uc matches the line voltage (per esempio., Uc=385V for a 380V system).

Backup Protection Coordination: The SPD needs to be connected in series with a dedicated backup protector (per esempio., un interruttore automatico) to prevent short-circuit fires. Its breaking capacity must match the SPD’s Imax.

Certifications and Brands: Prioritize products conforming to GB18802.1 standards. Well-known brands (per esempio., ABB, Schneider Electric, Siemens) offer better guarantees in terms of stability and after-sales service.