Type 2 Surge Protector 4P 15kA

The Cirprotec CS4P-15/400, reference 77705428, is a Type 2 transient surge protector designed to protect 230/400 V three-phase electrical installations against voltage spikes induced by lightning strikes or switching operations on the network. It features 4 poles, an internal 4+0 configuration, and a maximum discharge current Imax of 15 kA, offering a compact solution for installation in electrical panels on DIN rail.

This surge protection device (SPD) belongs to Cirprotec’s CS range and features a monobloc 4 DIN-module design. It is especially suitable for TNS networks and provides protection in L-PE and N-PE modes. Its LED indicator allows the protector status to be visually checked during inspection and maintenance operations.

Main features of the Cirprotec CS4P-15/400

• Transient surge protector.
• Cirprotec reference: 77705428.
• Model: CS4P-15/400.
• Classification according to EN 61643-11: Type 2.
• Classification according to IEC 61643-11: Class II.
• Internal configuration: 4+0.
• Number of poles: 4.
• Rated voltage: 230/400 V AC.
• Rated frequency: 50-60 Hz.
• Maximum discharge current Imax: 15 kA.
• Nominal discharge current In: 5 kA.
• Protection level Up: ≤1.2 kV.
• Maximum continuous operating voltage Uc: 275 V AC.
• Monobloc format.
• Installation on DIN rail.
• Width of 4 DIN modules.
• Status indication via LED.
• Protection modes L-PE / N-PE.
• TNS network configuration.
• IP20 protection rating.

Type 2 protection against transient surges

The CS4P-15/400 is classified as a Type 2 / Class II SPD and is intended to limit transient overvoltages that may occur in the electrical installation as a result of indirect lightning strikes, induced phenomena, or switching operations on the network.

Its function is to divert the energy associated with these impulses to earth and limit the residual voltage reaching downstream equipment. In this way, it helps protect sensitive electrical and electronic loads and contributes to reducing failures associated with voltage spikes.

Discharge capacity

The protector offers a maximum discharge current Imax of 15 kA with an 8/20 µs waveform and a nominal discharge current In of 5 kA. Its voltage protection level Up is equal to or less than 1.2 kV, helping to limit the surge voltage that can reach connected equipment.

Electrical parameter Value EN classification Type 2 IEC classification Class II Rated voltage Un 230/400 V AC Frequency 50-60 Hz Maximum continuous operating voltage Uc 275 V AC Nominal discharge current In (8/20 µs) 5 kA Maximum discharge current Imax (8/20 µs) 15 kA Voltage protection level Up ≤1.2 kV Short-circuit current rating Isccr 10 kA Maximum backup fuse 63 A gG Response time ≤25 ns

4-pole configuration

The Cirprotec 77705428 features an internal 4+0 configuration and 4 poles. It is designed for TNS networks and operates through L-PE and N-PE protection modes, providing protection for the phases and neutral with respect to the protective conductor.

Its 230/400 V AC rated voltage makes it suitable for common three-phase electrical panels in commercial, tertiary, and industrial installations that require Type 2 transient surge protection.

Monobloc format for DIN rail

The CS4P-15/400 has a monobloc construction and occupies 4 modules on DIN rail. This design allows it to be integrated compactly into distribution electrical panels and centralize protection for the four lines in a single device.

Unlike protectors with pluggable cartridges, this model uses a monobloc body. The device status can be checked via its LED indication system, making periodic installation inspections easier.

Mechanical and environmental characteristics

Characteristic Value Format Monobloc Number of poles 4 Internal configuration 4+0 Number of DIN modules 4 Network configuration TNS Protection modes L-PE / N-PE Indication type LED Protection rating IP20 Insulating material PC + fiberglass Housing color Grey RAL 7035 Flammability class UL94 V-0 Rigid conductor cross-section 6 to 35 mm² Flexible conductor cross-section 6 to 25 mm² Tightening torque 4 Nm Operating temperature -40 to 85 °C Operating humidity 5 to 95 %

Installation and applications

The Cirprotec CS4P-15/400 surge protector is intended for distribution electrical panels where Type 2 protection against transient surges is required. It can be used in residential, commercial, tertiary, or industrial building installations with electrical characteristics compatible with the device.

Thanks to its DIN rail mounting, four-module width, and four-pole configuration, it allows surge protection to be integrated easily inside the electrical panel. To ensure proper system operation, conductor cross-sections, upstream protection devices, connection diagrams, and other requirements defined by Cirprotec must be respected.

Standards

The Cirprotec CS4P-15/400 is developed in accordance with IEC 61643-11 and EN 61643-11 standards applicable to surge protection devices connected to low-voltage electrical networks.

With a maximum discharge current of 15 kA, Up protection level ≤1.2 kV, four poles, and a 4-module monobloc format, the Cirprotec 77705428 is a compact solution for protecting three-phase installations against transient surges and helping preserve connected electrical and electronic equipment.