Super Immunised Differential 4P 40A 30mA

The Procoel SI44030 super immune residual current circuit breaker is a four-pole 40 A device with 30 mA sensitivity designed to protect electrical installations against earth leakage differential currents. Its Class F technology provides superior immunity against nuisance tripping and enables detection of residual currents with different waveforms and frequencies, making it especially suitable for installations with variable frequency drives, HVAC equipment, power electronics, IT systems, and other non-linear loads.

With 4 poles, a rated voltage of 230/400 V AC, and a conditional short-circuit current rating of 10 kA, the SI44030 is ready for three-phase installations with neutral in residential, commercial, and industrial environments. Its 30 mA sensitivity provides high-sensitivity residual current protection, and the electromechanical design allows the detection, evaluation, and tripping functions to operate without relying on an auxiliary electronic power supply.

Class F super immune residual current circuit breaker

The Procoel SI44030 belongs to Class F, developed for installations where a conventional residual current device may be insufficient due to the presence of electronics, harmonics, and residual currents with components at different frequencies.

In addition to detecting sinusoidal alternating residual currents and the current waveforms covered by Class A devices, Class F extends detection to residual currents composed of multiple frequencies generated by electronic loads and frequency converters.

The manufacturer specifies leakage detection capability with frequencies up to 1 kHz, offering protection adapted to modern electrical installations with a high presence of power electronics.

Greater immunity against nuisance tripping

Super immune technology is designed to minimize unwanted disconnections caused by transient disturbances, harmonics, or certain leakage currents generated during the normal operation of electronic equipment.

This feature is especially useful in installations where an unnecessary disconnection can cause service interruptions, such as offices, retail premises, HVAC installations, computer systems, or professional processes.

4 poles for three-phase installations

The SI44030 incorporates four poles and is designed to simultaneously control the three phases and neutral of a three-phase installation.

The neutral pole is located on the left side of the device, a feature that must be taken into account when wiring and connecting via distribution combs.

40 A rated current

The rated current of the residual current circuit breaker is 40 A. The device must be combined with the appropriate overload and short-circuit protection, since its main function is residual current protection against leakage currents.

The selection of the associated miniature circuit breakers must be made according to the conductor cross-section, installation characteristics, and applicable regulations.

30 mA residual current sensitivity

The SI44030 has a rated residual operating current IΔn of 30 mA. This sensitivity is intended to provide a fast response to leakage currents that may occur due to insulation faults or indirect contact.

The residual current device disconnects the circuit when it detects a residual current that meets the tripping conditions established by the standard and by its Class F characteristics.

Detection of residual currents up to 1 kHz

One of the main advantages of the Class F residual current device is its ability to work with complex residual currents generated by electronic equipment.

It can detect sinusoidal alternating residual currents, currents compatible with Class A requirements, and mixed-frequency currents up to 1 kHz. For this reason, it is suitable for equipment incorporating control or frequency conversion electronics.

Ideal for electronic loads and variable frequency drives

Class F residual current protection is especially suitable for circuits with equipment that can generate high-frequency leakage or distorted waveforms.

• Variable frequency drives.
• Air conditioning equipment.
• Electronically controlled pumps.
• Computer equipment.
• Electronic power supplies.
• Appliances with speed control.
• Professional equipment with power electronics.
• Commercial and industrial installations.

High resistance to transient currents

The SI44030 offers high immunity to transient currents. Technical documentation indicates resistance to 8/20 µs waveform impulses of up to 3 kA.

This feature helps prevent unwanted tripping in the event of certain short-duration transient disturbances.

Conditional short-circuit current rating of 10 kA

The device has a conditional short-circuit current rating Inc of 10 kA in accordance with the conditions established for this type of residual current protection.

Coordination with the upstream overcurrent protection must be carried out according to the manufacturer’s specifications and the characteristics of the installation.

Electromechanical operation

The residual current device uses an electromechanical operating system. The residual current detection, evaluation, and tripping functions do not depend on an auxiliary electronic power supply.

This operating principle allows the residual current protection mechanism to act according to the electrical conditions specified by the manufacturer even without an independent auxiliary source.

230/400 V rated voltage

The Procoel SI44030 is designed to operate at a rated voltage of 230/400 V AC, suitable for common low-voltage three-phase installations.

Its four-pole configuration allows the active conductors of the protected circuit to be disconnected together.

Compatible with comb busbars

The device supports connection via PIN-type comb busbars, making integration with other modular devices installed inside the electrical panel easier.

This option simplifies power distribution and allows for a neater installation when compatible components are used.

Terminals for conductors up to 35 mm²

The terminals accept conductors with a cross-section of up to 35 mm². The cross-section used should be selected according to the current, circuit length, installation system, and applicable electrical regulations.

Visual contact position indicator

The SI44030 includes a mechanical indicator that allows the contact status to be visually identified.

• Red: contacts closed / ON position.
• Green: contacts open / OFF position.

This indication makes it easy to quickly check the status of the residual current device during maintenance or diagnostic operations.

Modular installation in electrical panels

The residual current device is designed for modular DIN rail mounting in electrical panels. Its approximate dimensions are 85 mm high, 70 mm wide, and 58 mm deep.

The width corresponds to the standard four-module format for a four-pole residual current device.

IP20 protection

The device has an IP20 protection rating, suitable for installation inside panels or electrical enclosures that provide the additional protection required by the environmental conditions of the site.

Vertical or horizontal installation

The manufacturer allows the residual current device to be mounted in either vertical or horizontal position, providing flexibility in the arrangement of components inside the electrical panel.

Complies with IEC/EN 61008-1

The Procoel SI44030 is developed in accordance with IEC/EN 61008-1, the standard applicable to residual current-operated circuit-breakers without integral overcurrent protection for household and similar uses.

For this reason, it must be installed together with the appropriate miniature circuit breakers to provide protection against overloads and short circuits.

Applications of the Procoel SI44030 super immune residual current device

• Three-phase electrical panels.
• Homes with a high presence of electronic loads.
• Retail premises.
• Offices and commercial buildings.
• HVAC installations.
• Variable speed drives and frequency converters.
• Computer equipment.
• Pumps with control electronics.
• Compatible industrial installations.
• Circuits where nuisance tripping occurs with conventional residual current devices.

Technical characteristics of the Procoel SI44030

• Brand: Procoel / Hyundai Electric.
• Reference: SI44030.
• Type: super immune residual current circuit breaker.
• Class: F.
• Range: SI / PCL.
• Number of poles: 4.
• Configuration: three-phase + neutral.
• Neutral position: left.
• Rated current: 40 A.
• Residual current sensitivity: 30 mA.
• Rated voltage: 230/400 V AC.
• Conditional short-circuit current rating Inc: 10 kA.
• Operating principle: electromechanical.
• Frequency detection: up to 1 kHz.
• Immunity to 8/20 µs impulses: up to 3 kA.
• Maximum connection cross-section: 35 mm².
• PIN comb busbar connection: yes.
• Contact indicator: red ON / green OFF.
• Protection rating: IP20.
• Mounting: DIN rail.
• Installation position: vertical or horizontal.
• Approximate dimensions: 85 x 70 x 58 mm.
• Auxiliary contacts: no.
• Declared electrical/mechanical durability: minimum 2000 operations.
• Standard: IEC/EN 61008-1.
• Marking: CE.

Advanced residual current protection for installations with electronics

The Procoel SI44030 offers a residual current solution especially suited to three-phase installations where electronic loads can generate complex leakage currents. Its Class F rating extends detection capability up to 1 kHz and provides greater immunity against disturbances that can cause unnecessary disconnections in conventional residual current devices.

With 40 A rated current, 30 mA sensitivity, 4 poles, 10 kA, and terminals up to 35 mm², it is a solution aimed at both advanced residential installations and commercial and industrial environments.

Important: this device provides residual current protection, but it does not include overcurrent protection. It must be coordinated with the appropriate miniature circuit breakers and installed in accordance with current electrical regulations.