Residual current circuit breaker P312 2P B 16A 30mA TYPE AC DX3 410921

### Protection and safety of electrical installations

Residual Current Circuit Breaker (RCCB) P312 2P B 16A 30mA Type AC from the DX³ series is a reliable device that combines the functions of an overcurrent circuit breaker and a residual current device. It provides comprehensive protection of electrical circuits against the effects of overloads, short circuits and electric shock. This is a key element of every safe installation, both in residential and commercial buildings.

Functionality and application

This two-pole (2P) circuit breaker with B characteristic and rated current of 16A is designed to protect lighting and socket circuits. Characteristic B means that the circuit breaker reacts quickly to an increase in short-circuit current, but is more tolerant to short-term current surges, which is important when connecting devices with electric motors or other loads with high starting current. AC sensitivity (alternating current) means that the circuit breaker effectively detects leakage currents to earth at mains frequency.

Advantages for installers and users

• Function integration: Combining overcurrent and residual current protection in one device saves space in the distribution board and simplifies installation.
• Quick test function: Equipped with a test button allowing easy checking of the correct operation of the circuit breaker - an important element of regular installation maintenance.
• High breaking capacity: The rated short-circuit breaking capacity (Icn) is 6 kA, which guarantees effective disconnection of the circuit in the event of a short circuit.
• Universal mounting: Possibility of mounting on TH35 rail facilitates installation in standard distribution boards.
• Safety confirmed by standards: Compliance with EN 61009-1 and IEC 60947-2 standards ensures a high level of safety.
• Wide operating temperature range: Possibility of operation in the temperature range from -25°C to 70°C allows for use in various environmental conditions.
• Locking: Equipped with a lock preventing accidental switching on after switching off by the protection device.

Technical parameters and construction

The P312 DX³ circuit breaker is characterized by a solid construction and high quality of workmanship. Its width of 2 modules allows for efficient use of space in the distribution board. The cross-section of the connected conductors is from 0.75 mm² to 16 mm² for solid conductors and from 0.75 mm² to 10 mm² for stranded conductors, which ensures compatibility with various types of installation conductors. The degree of protection IP20 provides protection against finger contact, but does not protect against the effects of water. The energy limitation class is 3, which means it is adapted to work with high short-circuit energies.