Klockner-Moeller NZMH 4-25-CNA Motor Disconnect Switch 1 pcs

Klockner-Moeller NZMH 4-25-CNA Motor Disconnect Switch 

This device is engineered to provide robust protection for electric motors against thermal overloads and magnetic short circuits, in addition to enabling manual disconnection of motor circuits. It delivers comprehensive safeguarding and operational control within industrial and commercial electrical installations.

Key Features:

• Model: NZMH 4-25-CNA.
• Manufacturer: Klockner-Moeller.
• Type: 3-pole manual motor disconnect switch.
• Protective Functions: Features integrated thermomagnetic trip units that ensure protection against overcurrent and short-circuit conditions.
• Adjustable Thermal Trip Range (for motor overload protection): $16-25$ Amperes, precisely adjustable via a rotary selector on the front panel.
• Adjustable Magnetic Trip Range: $160-320$ Amperes.
• Motor Horsepower Ratings (HP):
  • 200 V: 5 HP
  • 230 V: ​7,5 HP
  • 460 V: 15 HP
  • 575 V: 20 HP
• Certifications and Standards Compliance:
  • UL Recognized (UL 508) and CSA Certified (22.2 Nr. 14) as 3-pole HP rated manual motor disconnects.
  • Conforms to IEC/EN 60947-2 (Circuit Breakers) and bears the CE marking.
  • Suitable for group applications in accordance with NEC 430-53 and CEC Part 1, Rule 28-206.
• UL/CSA Short Circuit Current Rating (RMS Symmetrical Rating):
  • 240 VAC: 100 kA
  • 480 VAC: 25 kA
  • 600 VAC: 25 kA
• Maximum Group Fuse or Circuit Breaker: Listed Branch Circuit Protective Fuse/Breaker: 600 Amperes.
• Construction: Features a robust, transparent plastic housing that facilitates visual inspection of internal components and trip status. The toggle handle provides clear "ON" and "OFF" positions for intuitive operation.

Unique Technical Advantages and Features:

• Multi-Standard Compatibility: Adherence to both North American (UL/CSA) and international (IEC/EN, CE) standards ensures broad applicability and seamless integration into diverse electrical systems worldwide.
• Dual Adjustable Protection: The provision of separately adjustable thermal and magnetic trip units allows for precise adaptation of protective characteristics to specific motor requirements and network conditions, providing optimal protection against overloads and short circuits.
• High Interrupting Capacity: The ability to interrupt short-circuit currents up to 100 kA at 240 VAC underscores the device's reliability in high-fault current environments.
• Enhanced Visual Diagnostics: The transparent housing offers a distinct advantage, enabling engineers and technical personnel to quickly and effectively perform visual inspections of internal components and monitor operational status without requiring disassembly.
• Suitability for Group Applications: Compliance with NEC and CEC provisions for group installations simplifies system design and deployment, allowing for common protection for multiple motors while maintaining safety integrity.

Datasheet