Residual-current circuit breaker with overcurrent protection Eti-Polam KZS-2M 2P 16A C 0.03A type AC

Eti-Polam KZS-2M 2P 16A C 0.03A type AC is a compact residual-current circuit breaker with overcurrent protection (RCBO) that combines earth-leakage detection and short-circuit/overload protection in a single two-pole enclosure. Designed for residential and light commercial installations, this device protects branch circuits, lighting and socket outlets by detecting imbalance currents of 30 mA and interrupting the circuit when overloads or short circuits occur. The unit has a C-type tripping curve and a rated current of 16 A.

Advantages

This RCBO integrates residual-current and overcurrent protection into one module, saving space in distribution boards and simplifying wiring. The 30 mA sensitivity provides protection against hazardous earth leakages while the C-characteristic ensures reliable operation with typical inductive loads such as motors and fluorescent lighting. Its two-pole configuration isolates both live conductors in single-phase systems, improving safety for connected circuits.

Suitable for (tasks / use cases)

• Protection of socket circuits in apartments, houses and small offices
• Protection of lighting circuits, including fixtures with electronic ballasts
• Feed circuits for small motors and household appliances with moderate inrush currents
• Use in compact distribution boards where combination protection reduces module count

When it may not be suitable

This RCBO is rated for 16 A and is intended for typical branch circuits; it is not suitable as a main incomer device for distribution boards with higher current demands. The device has type AC detection, which is designed for standard AC sinusoidal earth-leakage currents and may not reliably detect pulsating DC residual currents produced by some electronic equipment; in such cases a device with type A or type B sensitivity may be required.

Key specifications

• Poles: 2P (two-pole)
• Rated current: 16 A
• Tripping characteristic: C
• Residual current sensitivity: 0.03 A (30 mA)
• Function: Combined residual-current and overcurrent protection (RCBO)
• Application: Single-phase branch circuits (protection of sockets and lighting)

How to use

Install the RCBO into a compatible DIN-rail distribution board following local electrical standards and wiring diagrams. Connect the incoming live and neutral conductors to the designated terminals and route the outgoing conductors to the protected circuit. Ensure correct tightening of terminal screws and observe the device orientation marked by the manufacturer. After installation, perform insulation and earth-leakage tests and verify correct tripping by using a test button if available or by conducting an appropriate leakage simulation in accordance with local regulations.

What to consider before purchase

• Verify that 16 A rated current and C-characteristic match the connected load requirements
• Confirm type AC residual-current detection is suitable for the types of equipment on the circuit
• Ensure physical dimensions and DIN-rail mounting are compatible with your distribution board space
• Check local electrical codes for required residual-current sensitivity and device type

Usage recommendations

For reliable protection, use this RCBO on individual branch circuits for sockets and lighting, avoid oversizing the device relative to continuous load, and test periodic operation according to local safety schedules to confirm residual-current trip functionality.