The Unipower HPL130A.400 offers real-time load supervision using true power (kW) plus dynamic monitoring via dP/dt (rate of change of power). Designed for machines with fluctuating loads, it supports auto-reset, peak detection, and 4-20mA output proportional to load. Voltage change compensation via dU/dt ensures robust alarm handling.
🔧 Technical Highlights:
- Measuring Voltage: 3 x 400V AC
- Power Calculation: P = √3 x U x I x Cos?
- dP/dt and dU/dt Monitoring: For detecting sudden load change
- Output: Relay + 4-20mA current loop
- Current Input: 1, 3, 5, or 8A internal / External CT
✅ Benefits:
- Monitors shock loads and slow overloads
- Protects motors from blockages and jams
- Compensates for voltage variations
🚀 Applications:
- Screw conveyors and bucket elevators
- Mixers and crushers
- Machinery with frequent load shifts
Combines power monitoring with dynamic profiling for early fault detection.
FAQs
- Q: What is the main advantage of the HPL130A?
A: HPL130A combines traditional kW supervision with dynamic dP/dt and dU/dt detection, making it ideal where sudden changes in load must be detected quickly.
- Q: Which applications suit HPL130A best?
A: It is particularly useful on conveyors, crushers and similar machines where shock loads and jams occur.
- Q: Can HPL130A be used as the sole protection relay?
A: Yes. It can be used as the main motor load protection relay, but should be coordinated with the thermal overload and other safety devices.