Residual current circuit breaker EFI-4 AC 100/0.3 002062155

Residual Current Device (RCD) EFI-4 AC 100/0.3 is a key element ensuring safety in electrical installations. Designed for both home and industrial use, it effectively protects against electric shock and safeguards devices from damage caused by short circuits and overloads. The device's construction allows for mounting on a DIN rail, simplifying and accelerating installation.

Protection and Application

The Residual Current Device, commonly known as an "RCD", is designed to quickly disconnect the circuit in the event of a current leakage to ground - a situation that can pose a threat to life. This minimizes the risk of electric shock both in the event of direct contact with live wires and indirect contact - through damaged devices. The device is intended for operation in TN-S, TN-C-S, TT and IT networks. The rated differential current value of 300 mA makes it suitable for protecting circuits with higher power consumption.

Technical Characteristics and Construction

The EFI-4 AC 100/0.3 RCD is characterized by a rated current of 100 A and a rated voltage of 400 V. It has four poles and is sensitive to AC type differential currents - i.e. alternating currents. Its short-circuit strength of 10 kA guarantees reliable operation even in the event of strong overvoltages. Compact dimensions (installation depth of 68 mm and width of 4 modules) allow for easy installation even in tight switchboards. The ability to connect wires with a cross-section from 1 to 25 mm² ensures compatibility with various types of electrical installations. Additionally, the device has a degree of protection IP20, which means protection against touching with a finger and against the ingress of solid objects larger than 12.5 mm.

Additional Functions and Advantages

• Possibility of additional equipment: Allows expanding the functionality of the RCD by mounting additional accessories, such as auxiliary contacts or release devices.
• Wide operating temperature range: The device maintains its properties in a temperature range from -25°C to +55°C, making it suitable for use in various environmental conditions.
• Clear identification: Contact position indicator facilitates quick assessment of the RCD status (on/off).
• Safety of use: Protected connection terminals minimize the risk of accidental contact with live parts.
• Versatility of mounting: The possibility of using insulated busbars on both the upper and lower terminals facilitates installation and configuration of the device.