Residual current circuit breaker Noark EX9NLE 111148 with overcurrent protection 1P 30mA type AC EL 1PN B16

Noark EX9NLE 111148 is a single-pole residual current circuit breaker with integrated overcurrent protection (RCBO). It provides earth-fault detection with a rated residual operating current of 30 mA and AC-type sensitivity designed for sinusoidal alternating current leakage. The built-in overcurrent trip uses a B-characteristic at 16 A, combining short-circuit and overload protection with residual current protection in one compact module suitable for residential and light-commercial electrical installations.

Advantages

The device combines residual-current detection and overcurrent protection in a single unit, reducing the required panel space and simplifying wiring. AC-type sensitivity ensures reliable detection of sinusoidal leakage currents while the 30 mA threshold provides protection against electric shock. The B16 overcurrent characteristic offers prompt tripping for short-circuit and moderate overloads common in lighting and outlet circuits. The single-pole format supports typical single-phase distribution boards and allows easy integration into existing systems.

Suitable for

• Residential distribution boards protecting lighting and socket circuits
• Small commercial or office installations with single-phase circuits
• Circuits requiring combined earth-fault and short-circuit/overload protection in limited panel space

When it may not be suitable

This device is intended for AC-type leakage detection and will not provide selective detection of pulsating DC or complex residual currents that require A- or F-type sensitivity. For three-phase systems, three-pole or four-pole devices are required instead of this single-pole model. Additionally, applications that require adjustable trip curves or higher continuous current ratings than 16 A should consider alternative devices with appropriate characteristics.

Key specifications

• Pole configuration: single-pole
• Residual operating current: 30 mA
• Sensitivity type: AC (sinusoidal AC leakage)
• Overcurrent characteristic: B curve, 16 A
• Protection functions: residual-current (earth-fault) and overcurrent (short-circuit/overload)
• Intended use: single-phase residential and light-commercial circuits

How to use

Install the RCBO into a compatible DIN-rail distribution board following local electrical codes. Connect the phase conductor through the device and ensure the neutral and earth conductors are correctly routed according to the installation manual. Verify correct polarity and tightness of terminal connections. After installation, perform standard commissioning tests: measure continuity of protective conductors, verify correct tripping at residual current test points, and confirm overcurrent protection operates within expected parameters during functional testing. Regularly test the residual-current function according to applicable regulations and maintenance schedules.

What to consider before purchase

• Confirm single-pole format is compatible with your distribution board and system configuration
• Verify that AC-type sensitivity and 30 mA residual threshold meet your protective requirements
• Ensure 16 A B-characteristic overcurrent rating matches the expected load and downstream device coordination
• Check local regulations for required device types (A, F, or B) and testing intervals

Usage recommendations

Use this RCBO on single-phase circuits where combined earth-fault and overcurrent protection is desired and where leakage currents are expected to be sinusoidal. Periodic testing of the residual-current trip and adherence to installation torque and wiring standards will help maintain reliable protection.