Acti9 Combi SPU 3P + N 32 A circuit breaker with combined surge protection

The Acti9 Combi SPU 3P+N 32A circuit breaker from Schneider Electric, reference A9L20732, is a comprehensive solution for protecting electrical installations in small residential and tertiary environments. This device combines protection against overloads, short circuits, and transient overvoltages, providing reliable protection for electrical systems. By integrating these functions into a single device, installation is simplified and service continuity is ensured in the event of variations in the power supply.

This circuit breaker from the Acti9 range is designed for 3P+N systems with one protected pole. Its rated current is 32A, making it ideal for protecting medium-sized circuits in TT and TN-S electrical networks. Additionally, the device is easily mounted on a DIN rail, facilitating its integration into modular electrical panels.

Protection against atmospheric overvoltages is ensured by the inclusion of a Type 2 surge protector, which has been tested to handle an impulse current wave of 8/20 s. This surge protector has a maximum discharge capacity of 20 kA, allowing it to divert transient voltage peaks to ground without affecting the operation of connected devices. The nominal discharge current is 5 kA, providing effective protection against moderate overvoltages.

Advanced protection:

The Acti9 Combi SPU circuit breaker provides two types of protection:

1. Protection against overloads and short circuits, ensured by a C60 circuit breaker with thermal-magnetic technology, which interrupts the circuit in the event of prolonged overloads or immediate short circuits.
2. Protection against transient overvoltages generated by atmospheric phenomena or disturbances in the electrical network, diverting voltage peaks to ground and protecting sensitive equipment connected to the network.

Technical specifications:

• Rated current [In]: 32 A
• Number of poles: 3P + N (neutral on the left)
• Rated operating voltage [Ue]: 230/400 V AC at 50/60 Hz
• Breaking capacity: 10 kA
• Tripping curve: C
• Tripping technology: Thermal-magnetic
• Surge protection level in differential mode: ≤ 2.5 kV (between phase and neutral)
• Surge protection level in common mode: ≤ 1.5 kV (between neutral and ground)
• Maximum continuous operating voltage (differential mode): 340 V AC
• Maximum continuous operating voltage (common mode): 260 V AC
• Maximum discharge current: 20 kA
• Nominal discharge current: 5 kA

Dimensions and mounting:

• Height: 76 mm
• Width: 161 mm
• Depth: 102 mm
• Weight: 0.98 kg
• Number of 9 mm steps: 18
• Protection degree: IP20 at terminals, IP40 when in modular cabinets

This device includes local indicators to facilitate the identification of the protection status. A LED indicates the status of the surge protection, showing green when operational and red when the protection has tripped. It also has a contact position indicator with a flag (white/red) that shows whether the switch is open or closed.

Additional benefits:

• Fast response time: This circuit breaker has a response time of less than 25 ns, ensuring almost instantaneous protection against variations in the electrical network.
• Easy installation and maintenance: Mounting on a DIN rail facilitates installation in modular electrical panels. Additionally, it is designed to be compatible with TT and TN-S grounding systems.
• Mechanical and electrical durability: The mechanical durability of the breaker is up to 20,000 cycles, while its electrical durability is 10,000 cycles, ensuring a long service life.
• Complete protection: It not only protects against overloads and short circuits but also against dangerous voltage spikes, making it a versatile option for any electrical installation requiring reliable and comprehensive protection.

This Acti9 Combi SPU circuit breaker is the perfect choice for those needing advanced and combined protection against overloads, short circuits, and overvoltages in 32A installations. With its modular design and advanced technical features, it offers a safe and reliable solution for protecting electrical circuits in homes, small businesses, and commercial buildings.