Permanent Surge Protector IGA 1P+N 40A

The Cirprotec V-CHECK 2MP-40-D + CS21 surge protection device, reference 77706397C, is a protection assembly for single-phase electrical installations that combines protection against permanent overvoltages, a 40 A Automatic Main Switch (IGA), and Type 2 transient overvoltage protection. Its 1P+N configuration makes it suitable for protecting residential electrical panels and other 230 V single-phase installations against different voltage anomalies with a compact, coordinated solution.

The assembly integrates the V-CHECK 2MP-D-40 permanent overvoltage protector, with a 40 A C-curve MCB, and a Cirprotec CS21 transient surge protector rated at 15 kA. This combination provides protection against sustained rises in mains voltage and against short-duration transient surges caused by switching operations or indirect lightning effects.

Combined protection against permanent and transient overvoltages

Reference 77706397C brings together two complementary protection technologies. The V-CHECK module monitors permanent overvoltages and acts on the integrated circuit breaker, while the CS21 module limits transient overvoltages and diverts their energy within the conditions specified by the manufacturer.

• Permanent overvoltages: POP protection in accordance with UNE-EN 50550.
• Transient overvoltages: Type 2 / Class II surge protector.
• Magnetothermal protection: integrated 40 A C-curve MCB.
• Configuration: single-phase 1P+N.

Integrated 40 A C-curve MCB

The V-CHECK 2MP-D-40 incorporates a 40 A Automatic Main Switch with C tripping curve. In addition to participating in the disconnection of the installation when the protector detects a permanent overvoltage, the MCB provides protection against overloads and short circuits according to its rated characteristics.

The breaking capacity indicated for this range is 6 kA according to UNE-EN 60898-1.

POP permanent overvoltage protector

The V-CHECK module monitors the supply voltage of the installation and is designed to disconnect it when a permanent overvoltage occurs that exceeds the limits set by the device.

This type of anomaly can persist for a significantly longer time than a transient surge and can affect household appliances, electronic equipment, power supplies, and other connected loads.

Protection in accordance with UNE-EN 50550

The V-CHECK MP-D range is designed as a POP permanent overvoltage protector in accordance with UNE-EN 50550 and is supplied pre-wired with an integrated automatic switch.

This integration makes installation in the electrical panel easier and reduces the need for interconnections between separate components.

15 kA Type 2 transient surge protection

The assembly also incorporates a Cirprotec CS21 protector for transient overvoltages, classified as Type 2 according to EN IEC 61643-11 and Class II. It is especially suitable as protection in distribution boards of installations not directly exposed to lightning strikes or as a second stage when a Type 1 protection is installed upstream.

The CS21 offers a maximum discharge current Imax of 15 kA with an 8/20 µs waveform and a nominal discharge current In of 5 kA.

Compact 2-pole CS21 in a single module

The CS21 transient protector has an internal 1+1 configuration with 2 poles and occupies only 1 DIN rail module. It is designed for TT and TNS networks and provides protection in L-N and N-PE modes.

Its monobloc design makes it possible to add transient protection while occupying very little space inside the electrical panel.

230 V nominal voltage

The assembly is intended for single-phase low-voltage installations. The CS21 operates with a nominal voltage of 230 V AC at 50-60 Hz, while the V-CHECK MP-D permanent overvoltage protector is designed for 1F+N single-phase applications.

Transient protection with thermal disconnection

The CS21 module incorporates dynamic thermal disconnection. This system allows the protection element to disconnect internally when it reaches the end of its service life or when a condition occurs that compromises its safe operation.

It also features visual LED indication to make it easier to check the protector status.

10 kA short-circuit capacity of the CS21

For the CS21 transient overvoltage module, Cirprotec specifies a short-circuit capacity Isccr of 10 kA and a maximum upstream fuse of 63 A type gG.

Coordination with the overcurrent protection devices in the panel must be carried out in accordance with the manufacturer’s instructions and the actual characteristics of the installation.

DIN rail mounting

All elements of the assembly are designed for modular DIN rail mounting. The permanent overvoltage protector with MCB occupies 3 modules and the CS21 occupies 1 module, so the assembly requires approximately 4 DIN modules.

This configuration makes it possible to integrate the main protections against voltage anomalies in a reduced space inside the electrical panel.

Transient protector connections

The CS21 accepts rigid conductors from 6 to 35 mm² and flexible conductors from 6 to 25 mm². Its housing is made of polycarbonate with UL94 V-0 flammability rating.

The final conductor cross-section must be selected according to the characteristics of the installation, the existing protections, and the applicable electrical regulations.

Wide environmental range of the CS21 module

Cirprotec specifies an operating temperature range for the CS21 of -40 to +85 °C and an admissible relative humidity of 5 to 95%.

Applications of the Cirprotec 77706397C

• Single-phase residential electrical panels.
• Apartments and second homes.
• Commercial premises.
• Offices and small businesses.
• Homeowners’ associations.
• Electrical panel upgrades.
• Installations requiring a 40 A MCB.
• Protection of electrical and electronic equipment against permanent and transient overvoltages.

Technical features of the Cirprotec 77706397C

• Brand: Cirprotec.
• Reference: 77706397C.
• Assembly: V-CHECK 2MP-40-D + CS21.
• Type: combined protection against permanent and transient overvoltages with MCB.
• Application: single-phase installation.
• Configuration: 1P+N.
• MCB rated current: 40 A.
• MCB curve: C.
• MCB breaking capacity: 6 kA according to UNE-EN 60898-1.
• Protection against permanent overvoltages: yes.
• POP standard: UNE-EN 50550.
• Protection against transient overvoltages: yes.
• Transient protector: CS21.
• Transient classification: Type 2 / Class II.
• CS21 configuration: 1+1, 2 poles.
• CS21 nominal voltage: 230 V AC.
• Frequency: 50-60 Hz.
• Maximum discharge current Imax: 15 kA, 8/20 µs waveform.
• Nominal discharge current In: 5 kA, 8/20 µs waveform.
• CS21 short-circuit capacity Isccr: 10 kA.
• Maximum upstream fuse for CS21: 63 A gG.
• Dynamic thermal disconnection: yes.
• CS21 status indication: visual via LED.
• CS21 network configurations: TT and TNS.
• Protection modes: L-N / N-PE.
• CS21 format: monobloc.
• Modules for permanent protector + MCB: 3.
• Modules for CS21: 1.
• Approximate space required for the assembly: 4 DIN modules.
• Mounting: DIN rail.
• Rigid conductor accepted by CS21: 6-35 mm².
• Flexible conductor accepted by CS21: 6-25 mm².
• CS21 insulating material: polycarbonate.
• Flammability: UL94 V-0.
• CS21 operating temperature: -40 to +85 °C.
• CS21 relative humidity: 5-95%.
• Transient protector standards: IEC 61643-11 / EN IEC 61643-11.
• EAN of the assembly: 8435297856047.

Comprehensive protection for 40 A single-phase panels

The Cirprotec 77706397C brings together in a single assembly a 40 A C-curve MCB, POP protection against permanent overvoltages, and a 15 kA Type 2 surge arrester for transient overvoltages. This combination is especially suited to single-phase panels where the goal is to protect both the installation and connected equipment against different mains voltage disturbances.

Its pre-wired configuration, modular format, and the inclusion of the compact CS21 make installation easier and reduce the space required compared with solutions made up of fully independent devices.

Important: reference 77706397C includes transient overvoltage protection in addition to the permanent protection and MCB indicated in the title. Selection, coordination, and installation of the assembly must be carried out according to the network scheme and Cirprotec instructions.