Acti9 Combi SPU Circuit Breaker with Combined Surge Protection 3P + N 32 A

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

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 transient suppressor, tested to handle an impulse current wave of 8/20 μs. This suppressor has a maximum discharge capacity of 20 kA, allowing transient voltage spikes to be diverted to earth 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 case of prolonged overloads or immediate short circuits.
2. Protection against transient overvoltages generated by atmospheric phenomena or disturbances in the electrical network, diverting voltage spikes to earth and protecting sensitive equipment connected to the network.

Technical Features:

• Rated current [In]: 32 A
• Number of poles: 3P + N (neutral on the left)
• Rated operational voltage [Ue]: 230/400 V AC at 50/60 Hz
• Breaking capacity: 10 kA
• Tripping curve: C
• Tripping technology: Thermal-magnetic
• Overvoltage protection level in differential mode: ≤ 2.5 kV (between phase and neutral)
• Overvoltage protection level in common mode: ≤ 1.5 kV (between neutral and earth)
• 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 signalling for easy identification of the protection status. A LED indicates the overvoltage protection status, showing green when operational and red when the protection has tripped. Additionally, a contact position indicator with a flag (white/red) shows whether the circuit breaker 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: The DIN rail mounting facilitates installation in modular electrical panels. It is also designed to be compatible with TT and TN-S earthing systems.
• Mechanical and electrical durability: The mechanical durability of the circuit 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 in need of 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.