Overcurrent circuit breaker, 6kA BKN series 4P 50A characteristic D BKN 4P D50A

Safety and protection of electrical installations

Overcurrent circuit breaker of the BKN 4P series with a rated current of 50A and characteristic D is a reliable element protecting electrical installations against overloads and short circuits. Designed to work with circuits requiring a delayed reaction to current increase, making it an ideal choice for protecting devices with high starting current.

Design and application

Four-pole BKN circuit breaker, mounted on a DIN rail, provides comprehensive protection in three-phase and single-phase installations. Its construction guarantees a quick reaction in the event of a failure, minimizing the risk of damage and fires. These circuit breakers are used in residential, commercial and industrial buildings. Characteristic D means that the circuit breaker allows for short-term exceeding of the rated current without tripping – this is useful when starting electric motors or other devices generating high starting current.

Key features and benefits

• High breaking capacity: 6kA – effectively interrupts the circuit in the event of a short circuit, protecting the remaining elements of the installation.
• Characteristic D: Delayed reaction to current increase, ideal for protecting circuits with devices with high starting current (e.g. motors, transformers).
• Four-pole construction: Provides comprehensive protection in three-phase and single-phase installations.
• DIN rail mounting: Enables easy and quick installation in electrical switchboards.
• Wide range of wire cross-sections: Supports wires with a cross-section from 1 mm² to 25 mm², providing flexibility when selecting appropriate cables.
• Contact position indicator: Allows visual control of the circuit breaker status (on/off), facilitating diagnostics and maintenance.
• Wide operating temperature range: The circuit breaker maintains its properties in the temperature range from -5°C to 40°C, increasing its reliability in various environmental conditions.
• Protection degree IP20: Provides protection against touching with fingers and against the ingress of solid objects larger than 12.5 mm.

The circuit breaker operates at a rated voltage of 230/400 V AC, has a rated current of 50 A and is designed for mounting on a DIN rail. It supports wire cross-sections from 1 mm² to 25 mm², and its operating temperature is in the range from -5°C to 40°C. The degree of protection is IP20.

BKN series circuit breakers are manufactured by LS ELECTRIC, a renowned manufacturer of electrical components, which guarantees high quality workmanship and reliable operation.