THIIM PADA-B400-AA3C is a three-phase voltage control relay designed to monitor phase loss, phase unbalance and voltage deviations in industrial power systems. It operates in fail-safe mode and is self-powered directly from the monitored phases for reliable motor and equipment protection.
🔧 Technical Highlights:
- Monitoring Function: Phase loss and phase unbalance
- Nominal Input Voltage: 380, 400 or 415 V AC phase-to-phase (selectable)
- Frequency Range: 45 to 66 Hz
- Unbalance Detection: 2 percent of UN differential
- Unbalance Sensitivity: Adjustable from 5 to 25 percent
- Response Time: Approx. 500 ms
- Time Delay: Adjustable on and off delay, 0 to 10 s
- Output: 2 C/O relay contacts
- Contact Rating: 6 A at 250 V AC
- Supply: Derived from L1 to L3 monitored phases
- Mounting: 35 mm DIN rail
- Operating Temperature: -25 to +55 °C
✅ Benefits:
- Prevents motor damage caused by phase failure or voltage imbalance
- Fail-safe design ensures safe shutdown on supply loss
- Accurate unbalance detection independent of absolute voltage level
- Resistant to harmonics, spikes and electrical noise
- Compact DIN rail format for control panels
🚀 Applications:
- Motor protection circuits
- Pumps, fans and compressors
- Industrial machinery and process equipment
- Cranes, hoists and elevators
- Three-phase mains and generator monitoring
A robust three-phase voltage monitoring relay delivering dependable protection against phase and voltage faults in industrial installations.
FAQs
- Q: Does the PADA-B400-AA3C require an external power supply?
A: No, it is self-powered directly from the monitored three-phase system. - Q: What happens when a phase failure occurs?
A: The relay de-energises in fail-safe mode, opening the output contacts to protect connected equipment.