Universal motor protection module UBZ-305M NTBZ305M0-1

Universal motor protection module – comprehensive protection for your installation

This advanced UBZ-305M module is an intelligent solution for protecting asynchronous motors with a power range of 2.5 kW to 315 kW. The device works with standard external current transformers with an output current of 5 A, providing flexibility in component selection and easy integration with existing systems. UBZ-305M works perfectly in networks with isolated and grounded neutral points, offering versatility and reliability in various installation configurations. DIN rail mounting simplifies installation and servicing.

This module provides continuous monitoring of key motor operating parameters, such as network voltage, phase currents, and insulation resistance. This makes it possible to detect and prevent various failures, minimizing the risk of downtime and costly repairs. This is not only protection against typical overloads, but also advanced diagnostics of the engine condition.

Advanced protection and monitoring functions

UBZ-305M offers a wide range of protective functions, including:

• Protection against network voltage irregularities: monitors voltage fluctuations, phase failure, phase sequence disturbances, and voltage asymmetry.
• Protection against mechanical overloads: reacts to symmetrical overloads with phase currents.
• Protection against reverse sequence current: detects irregularities indicating potential problems with the windings.
• Detection of phase current asymmetry: identifies insulation damage inside the motor or power cable.
• Protection against loss of torque on the motor shaft ("dry running"): particularly important for pumps and other devices requiring constant load.
• Protection against prolonged starting or rotor blocking.
• Insulation resistance control: checks the insulation condition before starting the motor, preventing serious failures.
• Protection against stator winding short circuit to ground: detects leakage current to ground during motor operation.
• Winding overheating monitoring: uses sensors built into the motor or external temperature sensors for precise thermal control.

Thanks to this, UBZ-305M is a comprehensive solution ensuring reliable protection of electric motors in demanding industrial conditions. The device controls the electromagnetic release coil (contactor), ensuring a quick response in the event of a hazard. Additionally, the module allows controlling motors using analog inputs and USB and RS-485 interfaces, which increases its functionality and integration with industrial automation systems.