Motor starter PKZM4, Ir=50-58A PKZM4-58-EA 190023

Motor starter – reliable motor protection

This three-phase motor starter PKZM4-58-EA from Eaton is a key element in protecting electrical installations powering motors. It provides effective protection against overload and short circuit, minimizing the risk of damage and downtime. The device is designed for both professional applications and end-users who want to ensure the safety of their equipment.

Characteristics and application

The PKZM4-58 starter is a fixed-mounted device designed to protect motors up to 30 kW at 400V. Its main task is to disconnect the circuit in the event of dangerous situations, such as an overload caused by excessive load or a short circuit. Additionally, the built-in phase failure sensitivity protects the motor from operating in an incomplete circuit, which can lead to overheating and damage. The overload release with adjustable setting (50-58A) allows for precise adaptation to the load characteristics.

Advantages and benefits

• Versatility: Suitable for a wide range of applications in industry, construction and households.
• Protection against various failures: Protects against overload, short circuit and phase failure.
• Adjustable setting: Possibility to adjust the tripping current of the overload release to the specific load (50-58A).
• High breaking capacity: Rated short-circuit breaking capacity at 50 kA at 400V AC guarantees quick and effective disconnection of the circuit in the event of a short circuit.
• Durability and reliability: Made of high-quality materials, ensuring long life and stable operation.
• Easy installation: Screw connection of the main contacts facilitates installation and connection of wires.
• Compact dimensions: Height 140 mm, width 55 mm and depth 160 mm allow for mounting in limited space.
• Compliance with standards: Meets the requirements of IEC/EN 60947, VDE 0660, UL 508 and CSA C 22.2 No. 14 – confirms the safety and quality of the product.

Construction and parameters

The starter is characterized by a solid thermomagnetic construction, which means it has both thermal (overload) and magnetic (short-circuit) protection. The rated continuous current Iu is 58 A, allowing for safe power supply to devices with appropriate power. Power losses are 28.2 W during device operation. The degree of protection IP20 provides protection against finger contact and against the ingress of solid objects larger than 12.5 mm – important for safe use in various environmental conditions. The device has three poles (3P), making it ideal for use with three-phase electric motors.