SCHNEIDER A9Z51440 Residual Current Circuit Breaker RCCB Type AC 4P 40A 30mA

SCHNEIDER A9Z51440 RCD Residual Current Circuit Breaker RCCB Type AC 4P 40A 30mA
The A9Z51440 is a DIN-rail mounted residual current device for control panels in 3-phase 4P AC electrical systems at 400 VAC 50 Hz, featuring Type B-EV specifications. Type B-EV breakers are capable of detecting complex and highly dangerous leakage currents.

Specifications
- Type B-EV Protection: Detects all forms of leakage current (AC, Pulsating DC, Smooth DC), providing maximum safety in circuits with high-power electronic equipment.
- VisiSafe: A green indicator window guarantees complete safety when the breaker is in the OFF position (showing that the contacts are genuinely open).
- VisiTrip: Trip indicator for fast fault diagnosis, helping to reduce system downtime
- Voltage Independent: Tripping operates independently of the line voltage, ensuring reliable protection even under undervoltage conditions
- Communication Capable: Compatible with Acti9 accessories such as PowerTag and Smartlink for panel monitoring and control

Applications & Usage
- EV Charging Stations: An essential device for 3-phase EV charger circuits to comply with international safety standards
- 3-Phase Systems with Inverters or VFDs: Used to protect circuits supplying power to Variable Frequency Drives (VFDs), large UPS units, or backup power systems that may generate DC leakage current to ground