Permanent Surge Protector IGA 1P+N 25A

The Cirprotec V-CHECK 2MP-D-25 + CS21 surge protector, reference 77706395C, is a protection assembly for single-phase electrical installations that combines protection against permanent overvoltages, a 25 A automatic main circuit breaker (IGA), and Type 2 transient overvoltage protection. Its 1P+N configuration is especially suitable for electrical panels in homes, commercial premises, and other 230 V single-phase installations.

The assembly consists of the V-CHECK 2MP-D-25 permanent overvoltage protector, with integrated 25 A C-curve MCB, and the CS21-15/230 transient protector. In this way, a single solution can act against sustained voltage increases and limit very short-duration transient spikes associated with electrical switching operations or indirect effects of lightning strikes.

Combined protection against permanent and transient overvoltages

The reference 77706395C combines two complementary types of protection:

• Permanent overvoltages: the V-CHECK monitors the supply voltage and operates the integrated MCB when a permanent anomaly occurs according to its tripping curve.
• Transient overvoltages: the CS21 limits short-duration voltage surges and diverts the disturbance energy to earth.
• Overloads and short circuits: the 25 A MCB provides the corresponding thermal-magnetic protection for the circuit.

This combination helps protect both the installation wiring and the electrical and electronic equipment connected downstream.

Integrated 25 A C-curve MCB

The V-CHECK 2MP-D-25 incorporates a 25 A thermal-magnetic circuit breaker with C curve. The unit is factory prewired to simplify installation and reduce additional connections inside the panel.

The C curve is common in distribution circuits with loads that may generate moderate inrush currents. The breaking capacity associated with this family is 6 kA according to UNE-EN 60898.

Protection against POP permanent overvoltages

The V-CHECK module is designed to detect abnormal and sustained increases in mains voltage. This type of overvoltage can occur, among other causes, due to issues related to the neutral conductor and can subject electrical receivers to a voltage higher than expected for an extended period.

When a permanent overvoltage condition is detected in accordance with the curve established by the device, the system trips the integrated circuit breaker and disconnects the protected installation.

POP protection according to UNE-EN 50550

Cirprotec identifies the V-CHECK MP-D range as domestic protection against POP permanent overvoltages in accordance with UNE-EN 50550 and with built-in circuit breaker.

The solution is especially intended for protection panels in low-voltage installations where integrated permanent overvoltage monitoring and thermal-magnetic protection are required.

15 kA Type 2 transient protection

The 77706395C assembly adds a Cirprotec CS21-15/230 surge protector, classified as Type 2 according to EN 61643-11 and Class II according to IEC 61643-11.

The CS21 has a maximum discharge current Imax of 15 kA with an 8/20 µs waveform and is designed to limit transient overvoltages in low-voltage electrical panels.

• Classification: Type 2 / Class II.
• Imax L-N: 15 kA, 8/20 µs waveform.
• Imax N-PE: 15 kA, 8/20 µs waveform.
• Nominal discharge current In: 5 kA.

1+1 configuration of the transient protector

The CS21 uses an internal 1+1 configuration with 2 poles, specifically designed for single-phase installations with phase, neutral, and protective conductor.

The protection modes are L-N and N-PE, providing coordinated protection between phase and neutral and between neutral and earth.

Compatible with TT and TNS networks

Cirprotec specifies the CS21-15/230 for TT and TNS network configurations. Installation must be carried out in accordance with the connection diagram indicated by the manufacturer, paying special attention to the neutral conductor and the PE protective connection.

230 V AC rated voltage

The CS21 protector operates with a rated voltage of 230 V AC at 50-60 Hz. Its maximum continuous operating voltage is 275 V between phase and neutral.

These characteristics make it suitable for conventional low-voltage single-phase panels compatible with the indicated configuration.

CS21 protection level

For the transient protection module, Cirprotec specifies a protection level Up ≤1.2 kV between phase and neutral and ≤1.5 kV between neutral and earth.

The Up level represents the residual voltage that appears during protector operation under the specified test conditions and is an important parameter for coordinating protection with downstream equipment.

10 kA short-circuit capacity of the CS21

The CS21 transient protector has an Isccr short-circuit capacity of 10 kA and Cirprotec specifies a maximum upstream fuse of 63 A type gG for this module.

Final coordination with overcurrent protection devices must be carried out in accordance with the scheme and the actual characteristics of the installation.

Dynamic thermal disconnection

The CS21 incorporates a dynamic thermal disconnection system that allows the protection element to be internally isolated when it reaches end-of-life or an abnormal operating condition.

This function helps maintain safe device performance throughout its service life.

Visual LED indicator

The transient overvoltage module features visual indication via LED, making it easier to check its status during inspection and maintenance operations.

The standard CS21-15/230 reference used in this assembly does not include remote signaling contact.

Compact 4 DIN module format

The single-phase V-CHECK occupies 3 DIN modules and the compact CS21 only 1 additional module. The assembly therefore requires approximately 4 modules of space in the electrical panel.

Both components are ready for DIN rail mounting, making it easy to integrate them alongside the rest of the installation’s modular protection devices.

CS21 with only 1 module

One of the standout features of the CS21 is its extremely compact monobloc format. It integrates its 2 protection poles into just 1 DIN module, allowing Type 2 protection to be added without taking up the usual space of a conventional bipolar surge arrester.

Transient protector terminals

The CS21 accepts:

• Rigid conductors: from 6 to 35 mm².
• Flexible conductors: from 6 to 25 mm².

The conductor cross-section used must be determined according to the characteristics of the installation and Cirprotec’s instructions.

Wide environmental range of the CS21

The transient module is designed to operate between -40 and +85 °C and with relative humidity between 5 and 95%.

Its enclosure is made of polycarbonate, has UL94 V-0 flammability classification, and features a RAL 7035 grey finish.

Applications of the Cirprotec 77706395C

• Single-phase electrical panels in homes.
• Apartments and second homes.
• Commercial premises.
• Offices and small businesses.
• Homeowners’ associations.
• Electrical panel upgrades.
• Single-phase installations with 25 A MCB.
• Protection of household appliances and electronic equipment against voltage anomalies.

Technical characteristics of the Cirprotec 77706395C

• Brand: Cirprotec.
• Reference: 77706395C.
• Assembly: V-CHECK 2MP-D-25 + CS21-15/230.
• Type: combined protection against permanent and transient overvoltages with MCB.
• Application: single-phase installations.
• Configuration: 1P+N / 1F+N.
• Rated voltage: 230 V AC.
• Integrated MCB: yes.
• MCB rated current: 25 A.
• MCB curve: C.
• Breaking capacity: 6 kA according to UNE-EN 60898.
• Protection against permanent overvoltages: yes.
• POP protection: according to UNE-EN 50550.
• Prewired V-CHECK: yes.
• Protection against transient overvoltages: yes.
• SPD model: CS21-15/230.
• CS21 internal configuration: 1+1.
• Number of poles of the CS21: 2.
• CS21 EN classification: Type 2.
• CS21 IEC classification: Class II.
• Network configurations: TT and TNS.
• Protection modes: L-N / N-PE.
• Imax: 15 kA, 8/20 µs waveform.
• In: 5 kA, 8/20 µs waveform.
• Uc L-N: 275 V AC.
• Up L-N: ≤1.2 kV.
• Up N-PE: ≤1.5 kV.
• CS21 short-circuit capacity Isccr: 10 kA.
• Maximum upstream fuse for the CS21: 63 A gG.
• Dynamic thermal disconnection: yes.
• CS21 visual indicator: LED.
• Remote indication: no.
• V-CHECK modules: 3.
• CS21 modules: 1.
• Approximate total space: 4 DIN modules.
• Mounting: DIN rail.
• Rigid conductor accepted by CS21: 6-35 mm².
• Flexible conductor accepted by CS21: 6-25 mm².
• CS21 operating temperature: -40 to +85 °C.
• Relative humidity of the CS21: 5-95%.
• CS21 insulating material: polycarbonate.
• CS21 flammability: UL94 V-0.
• Main standards: UNE-EN 50550 and IEC/EN 61643-11.
• EAN of the assembly: 8435297857129.

Comprehensive protection for 25 A single-phase panels

The Cirprotec 77706395C combines in a single assembly a 25 A C-curve MCB, protection against permanent overvoltages, and a Type 2 surge arrester with Imax of 15 kA. In this way, it covers different electrical risks with a modular solution especially suitable for single-phase panels.

The prewired V-CHECK simplifies installation of permanent overvoltage protection, while the compact CS21 adds transient protection while occupying only one DIN module. The result is a solution of approximately 4 modules for homes, premises, and other compatible installations.

Important: although the provided title only mentions protection against permanent overvoltages and the 25 A MCB, the full reference 77706395C is sold as an assembly with the 15 kA CS21 transient protector. Installation must be carried out following Cirprotec’s diagram and by qualified personnel.