Lauritz Knudsen Exora RCCB, AC, 4 Pole

RCCBs are designed to provide protection against earth leakage currents, reducing the risk of electric shock and fire caused by insulation failure. Intended for use in low-voltage electrical installations, RCCBs continuously monitor the balance between phase and neutral currents and disconnect the supply immediately when a residual current is detected.

By isolating circuits during earth leakage conditions, RCCBs play a critical role in enhancing personnel safety and system reliability. They must be used in conjunction with suitable overcurrent protection devices such as MCBs or MCCBs.

Key Specifications

• Number of Poles: 4
• Rated Voltage: 415 VAC
• Frequency: 50 Hz
• Mounting: DIN rail
• Electrical Life (Operating Cycles): 10,000 cycles (up to 63 A)
• Mechanical Life (Operating Cycles): 20,000
• Terminal Capacity: 50 mm² (rigid), 35 mm² (flexible)

This 4-pole RCCB, Type AC, is suitable for three-phase systems where residual currents are purely alternating in nature. It is commonly used in residential, commercial, and light industrial distribution boards to provide effective earth leakage protection while meeting applicable safety and compliance requirements.

Key Features

Residual Current Protection
Provides fast and reliable disconnection in the event of earth leakage, helping to prevent electric shock and fire hazards.

4-Pole Configuration
Ensures simultaneous isolation of all phases and neutral, improving safety in three-phase installations.

DIN Rail Mounting
Compact design enables straightforward installation in standard distribution boards.

High Reliability Construction
Engineered for consistent performance, long operational life, and dependable protection under normal operating conditions.

Engineering Note

RCCBs do not provide protection against overloads or short circuits and must always be installed in coordination with appropriate overcurrent protection devices.