ETI KZS-2M2p EDI B residual current circuit breaker with overcurrent protection 2P 20A A 10kA lower connection (2172407)

The ETI KZS-2M2p EDI is a differential circuit breaker with overcurrent protection designed for simultaneous safeguarding of electrical circuits against overload, short circuit, and residual current. It is used in distribution boards of residential, commercial, and small industrial facilities where both automatic overcurrent protection and protection against electric shock are required in a single modular device. The lower connection simplifies wiring arrangements in the panel and can make conductor routing more convenient during installation. This model has 2 poles and a rated current of 20 A, which makes it suitable for individual consumer groups with moderate load. The B tripping curve is intended for circuits with low inrush currents, such as lighting circuits and standard household lines. The residual current rating of 0.03 A provides the sensitivity needed for additional personal protection and for monitoring insulation condition in the network. Type A indicates that the device responds not only to alternating residual current, but also to pulsating direct residual current, which broadens its applicability in modern installations with electronic loads. The breaking capacity of 10 kA allows the device to be used in networks where a higher prospective short-circuit current may occur. This parameter is important for ensuring proper interruption performance under fault conditions. The rated frequency of 50/60 Hz makes the breaker compatible with electrical systems operating within these frequency ranges. The supported conductor cross-section range of 1 to 25 mm² offers flexibility when connecting different supply lines and helps adapt the device to various wiring requirements. The product complies with IEC 61009, the standard that defines requirements for residual current circuit breakers with overcurrent protection. In practice, this means the device combines two functions in one unit: protection of wiring and connected equipment from overcurrent, and protection of people and installations from leakage current. With its 2-pole design, 20 A rating, 0.03 A residual current sensitivity, B curve, and 10 kA breaking capacity, this ETI device is a practical choice for protecting separate consumer circuits where compact modular installation and combined protection are required.