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The PKZ Series Motor Protection Circuit Breaker by KCISE delivers reliable industrial motor protection with high-performance overload, short-circuit, and phase-failure prevention. Engineered for demanding applications, it features a robust 25A current capacity and IEC/EN60947 compliance for maximum safety and operational continuity.
- Rated operational current up to 25A with 0.1-25A adjustable range
- High switching capacity (150/50KA/145V) with 14×Iu short-circuit release
- Single-phasing sensitive phase-failure protection
- Flexible DIN rail or screw mounting options per IEC/EN60947 standards
ZSPKZM0
KCISE
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The PKZ Series Motor Protection Circuit Breaker is engineered to manage operational currents up to 25A, delivering precise thermal overload protection for industrial motors. Operating this device provides a distinct, tactile snap through its rotary handle, which features clear ON/OFF position indicators. This ergonomic dial can be flexibly configured as a main isolation switch or an emergency stop mechanism, directly enhancing the physical safety of floor operators. By handling up to 25A, facility managers can standardize their protective components across various motor sizes, reducing the complexity of electrical planning and lowering overall procurement costs.
Electrical surges require immediate, definitive interruption. This breaker delivers a switching capacity of 150/50KA/145V, effectively isolating severe electrical faults before they reach sensitive AC motor windings. Inside the dense, heavy-duty polymer casing, specialized arc extinguishing chambers rapidly cool and dissipate electrical arcs generated during extreme overcurrent events. This exceptional 150/50KA/145V rating means engineering teams can rely on a single device to protect critical infrastructure, minimizing equipment downtime and preventing costly motor rewinding after power grid anomalies.
Motor longevity relies heavily on an immediate response to phase imbalances. The PKZ Series is strictly single-phasing sensitive, instantly detecting when one phase drops and disconnecting power before the motor overheats. Coupled with a factory-calibrated short-circuit release set to 14 x Iu, the magnetic trip mechanism reacts in milliseconds to dead shorts. For facilities operating in challenging climates, this protection remains stable across a wide thermal range from -25°C to +55°C. Buyers can also select enclosures ranging from IP20 for standard cabinet mounting to IP65 for environments exposed to heavy dust and direct water jets.
Installation efficiency directly impacts project timelines. This unit supports both standard screw mounting and rapid DIN rail attachment, locking onto the rail with a firm, audible click that assures technicians of a secure fit. To further accelerate panel building, the design incorporates tool-free push-in wiring terminals. This secure, vibration-resistant connection method can reduce panel wiring time by up to 50%, particularly valuable in heavy machinery applications where mechanical vibration is constant. Strict adherence to IEC/EN60947 standards guarantees that the breaker meets exact global safety and operational benchmarks.
At KCISE, the foundation of every PKZ Series Motor Protection Circuit Breaker begins with exacting material science. We source industrial-grade, flame-retardant thermoplastics that feel dense and rigid to the touch, ensuring the outer shell resists deformation under intense thermal stress. The internal conductive paths utilize specialized silver-alloy contacts, selected for their exceptional conductivity and resistance to contact welding during high-amperage strikes.
The assembly floor utilizes precision-driven automated lines to construct each motor protection breaker. Robotic arms handle the delicate placement of the bimetallic strips used for thermal overload detection, eliminating human error in calibration. The mechanical linkages connecting the rotary handle to the internal trip mechanism are machined to exact tolerances, resulting in a smooth, frictionless operation when manually engaging or disengaging the circuit.
Verification is non-negotiable for industrial safety devices. Every single PKZ Series unit undergoes multi-stage electrical and mechanical stress testing to confirm absolute compliance with IEC/EN60947 standards. Technicians simulate severe overcurrent scenarios in controlled thermal chambers, verifying that the magnetic trip responds precisely. We also conduct mechanical endurance tests, cycling the rotary switch thousands of times to ensure the tactile feedback remains crisp over a long operational lifespan.
Industrial projects rarely fit a one-size-fits-all approach. We provide tailored manufacturing configurations to optimize your control panel space and inventory management. By offering a single compact footprint that covers a wide current range, procurement departments can drastically reduce their warehousing requirements and streamline component sourcing. We also customize the external enclosures, providing specialized IP-rated housings that match the specific atmospheric challenges of your deployment site.
The PKZ Series is precisely engineered to support rated operational currents up to 25A. This specific rating allows panel builders to cover a vast majority of standard industrial motor applications, from conveyor belts to heavy-duty fluid pumps. By handling up to 25A, it provides a reliable thermal baseline, ensuring that motors operate within their safe temperature limits without experiencing nuisance tripping during normal startup surges.
Physical installation is designed for maximum efficiency on the shop floor. The unit is fully compatible with both standard 35mm DIN rail and direct screw mounting. When pressed onto a DIN rail, the metal spring clips engage with a solid, reassuring snap. Furthermore, the integration of push-in wiring terminals eliminates the need for manual torqueing of screws, resisting mechanical vibrations and significantly accelerating the overall control cabinet assembly process.
Yes, strict adherence to global safety benchmarks is a core attribute of this device. It is fully certified and complies with IEC/EN60947 standards, which dictate the rigorous performance requirements for low-voltage switchgear and controlgear. This compliance guarantees that the breaker will perform safely during fault conditions, providing international buyers with the assurance needed to deploy these units in critical infrastructure worldwide.
Modern industrial control panels demand components that work together efficiently. The PKZ Series is engineered to integrate directly into broader automation ecosystems, offering distinct advantages for system designers and electrical planners:
Compact Starter Combinations: The physical dimensions of the breaker align perfectly with mainstream contactor series. This allows engineers to build highly compact, direct-on-line motor starters without wasting valuable backplate space in the control cabinet.
Smart Automation Expansion: As facilities move toward advanced industrial automation, this breaker supports integration with intelligent wiring and communication modules. This connectivity enhances data transparency across the motor drive circuit for better operational monitoring.
Streamlined Engineering: By standardizing on a single breaker profile that easily mates with existing control hardware, electrical planners can significantly reduce the time spent on drafting, project planning, and overall control cabinet design.
