Doktorvolt DV-5552 3-Pole Miniature Circuit Breaker, B-Curve, 25A, 6kA

The Doktorvolt DV-5552 is a high-quality 3-pole miniature circuit breaker engineered to provide robust protection for electrical circuits in both residential and commercial environments. This device is designed to detect and interrupt overcurrent conditions, effectively safeguarding your wiring and connected equipment from the risks associated with overloads and short circuits. With its precise B-curve tripping characteristic and a 25A rated current, it ensures reliable performance in standard AC electrical systems.

Advantages

This miniature circuit breaker offers exceptional reliability and safety for modern electrical installations. Its 3-pole configuration allows for the simultaneous protection of three phases, making it an ideal choice for three-phase power distribution systems. The 6kA breaking capacity provides sufficient protection against high-current faults, ensuring that the circuit is disconnected rapidly when necessary. The compact design facilitates easy installation in standard distribution boards, while the durable construction guarantees a long service life under normal operating conditions.

Suitable for

• Residential electrical distribution boards
• Commercial building power systems
• Protection of lighting and heating circuits
• Three-phase electrical appliances and machinery

When it may not be suitable

This circuit breaker is specifically designed for AC systems and should not be used in DC applications. Furthermore, it is not suitable for circuits requiring a different tripping characteristic, such as C or D curves, which are often necessary for equipment with high inrush currents like large motors or transformers.

Key specifications

• Number of poles: 3
• Rated current: 25A
• Tripping characteristic: B-curve
• Breaking capacity: 6kA
• System type: AC

How to use

The Doktorvolt DV-5552 should be installed by a qualified electrician in accordance with local electrical regulations. The device is designed to be mounted onto a standard DIN rail within a distribution box. Ensure that the power supply is completely disconnected before beginning the installation. Connect the incoming phase wires to the top terminals and the outgoing load wires to the bottom terminals, ensuring all connections are tightened to the specified torque to prevent overheating. Once installed, the breaker can be switched on by moving the toggle to the upward position.

What to consider before purchase

• Verify that the 25A rated current matches the requirements of your specific circuit.
• Ensure the 3-pole configuration is compatible with your electrical system layout.
• Confirm that the B-curve tripping characteristic is appropriate for your connected loads.
• Check the available space in your distribution board for mounting.

Usage recommendations

Regularly inspect the circuit breaker for any signs of physical damage or discoloration. It is recommended to test the mechanical operation of the toggle switch periodically to ensure it moves freely. If the breaker trips, investigate the cause of the overload or short circuit before resetting the device.