Novatek-Electro UBZ-302M
The UBZ-302M is an Electric Motor Universal Protection Device manufactured by NOVATEK-ELECTRO LTD. It is designed for continuous monitoring of circuit voltage parameters, RMS values of phase/line currents of three-phase electric equipment, and electric motor insulation resistance values.
Key Features
Section titled “Key Features”- Protection of asynchronous induction motors from 2.5 kW to 30 kW
- Integrated current transformers (5-63 A) or external CT support (up to 800 A)
- Comprehensive voltage monitoring (undervoltage, overvoltage, imbalance, phase sequence)
- Current-based protection (overcurrent, undercurrent, negative sequence, ground fault)
- Thermal overload protection with motor thermal model
- Delayed start and rotor blocking protection
- Motor insulation resistance measurement before startup
- Temperature monitoring via PTC or Pt100/Ni100/Ni120 sensors
- USB and RS-485 interfaces with MODBUS protocol support
- Two analog inputs (0-20 mA and 0-10 V)
- Programmable automatic reclosing (ARC)
- Star-delta motor switching support
- DIN-rail mounting (9 modules)
Protection Types
Section titled “Protection Types”- Overcurrent phase protection (independent and dependent time delay)
- Ground fault protection (zero sequence current)
- Negative sequence current protection
- Thermal overload protection
- Undercurrent phase protection
- Delayed start and rotor blocking protection
- Coil overheating protection
- Voltage protection (overvoltage, undervoltage, imbalance)
- Phase sequence protection
- Motor insulation minimum resistance protection
- Phase loss protection
Common Use Cases
Section titled “Common Use Cases”- Industrial motor protection and monitoring
- Pump and compressor protection
- HVAC system motor control
- Conveyor and fan motor protection
- Process automation motor safeguards
Documentation
Section titled “Documentation”- Operating Manual – Complete operating instructions, installation, and configuration
Technical Reference
Section titled “Technical Reference”- Appendix A: Time-Dependent Delay Curves – Current protection tripping curves
- Appendix B: Star-Delta Switching – Star/delta motor switching wiring
- Appendix C: Modbus Communication – Communication protocol and register reference
Support
Section titled “Support”- Knowledge Base: Browse this documentation for detailed guides and references
- Support Center: Visit our Support Center for FAQs and troubleshooting
- Report an Issue: Submit a support ticket for technical assistance