Novatek-Electro UBZ-304
The UBZ-304 is a universal motor protection unit manufactured by Novatek-Electro, designed to protect three-phase AC induction motors from emergency conditions.
Key Features
Section titled “Key Features”- Current range: 5 A to 160 A (adjustable)
- Voltage: 3×(100–440) V, 50/60 Hz
- Multiple protection types: Overcurrent, thermal overload, ground fault, phase sequence, voltage limits, and more
- Temperature monitoring: Two temperature sensor inputs
- Communication: RS-232 and RS-485 interfaces with MODBUS protocol
- Motor insulation monitoring: Built-in insulation resistance measurement
- Analog inputs: 0-20 mA and 0-10 V inputs for external sensors
- Energy metering: Total, active, and reactive energy measurement
Protection Functions
Section titled “Protection Functions”The UBZ-304 provides comprehensive motor protection including:
- Maximum and minimum phase current protection
- Thermal overload protection
- Ground fault (zero sequence current) protection
- Negative sequence current protection
- Delayed start and rotor blocking protection
- Temperature protection (two sensors)
- Phase sequence and phase loss protection
- Minimum and maximum voltage protection
- Voltage imbalance protection
- Frequency protection
- Motor insulation resistance monitoring
Common Use Cases
Section titled “Common Use Cases”- Industrial motor protection and monitoring
- Pump and compressor safeguards
- HVAC system motor control
- Conveyor and fan motor protection
- Process automation applications
Documentation
Section titled “Documentation”- Operating Manual – Complete operating instructions (includes MODBUS communication protocol and register addresses in Section 5.4)
Technical Reference
Section titled “Technical Reference”- Appendix A: Current Protection Curves – Time-current characteristic curves
- Appendix B: Star-Delta Starting – Star-delta motor starting configuration
Technical Specifications
Section titled “Technical Specifications”| Parameter | Value |
|---|---|
| Motor rated current range | 5–160 A |
| Rated voltage | 3×(100–440) V |
| Frequency | 50/60 Hz |
| Current measurement error | ≤2.5% |
| Voltage measurement error | ≤1% |
| Power consumption | ≤5 VA |
| Operating temperature | -20°C to +55°C |
| Protection degree | IP20 (terminals), IP40 (housing) |
| Dimensions | 105×90×67 mm |
| Weight | ≤0.5 kg |
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