Controllers
◐ Controllers
FRI-3S variable frequency drive (3 phase)
FRI-3S three-phase variable frequency drive for pressure-based speed control of pumps. Requires no programming; up to 6 units can be linked for pressure boosting.
Phase
3x400 V
Motor load
3.2 – 17.4 A
Output
20–50 Hz
Tank
mandatory (min. 2 L)
Pressure transmitter
4–20 mA 10/16 bar
Versions
5 models
Applications
- Domestic and industrial water supply, pressure boosting
- Irrigation systems
- Automatic pump control
Operating conditions
- ⚠ Installing a pressure tank is MANDATORY (min. 2 L, pre-charge = 60% of operating pressure)
- Supplied accessory: 4–20 mA pressure transmitter, 10 or 16 bar
- Output: 3x400 V / 20–50 Hz
- Ambient temperature: 0–40 °C
- Cut-in pressure: operating pressure −0.3 bar (adjustable)
Functions and protections
- Overload protection
- Overvoltage protection
- Dry-running protection
- Soft start and stop
- Up to 6 units can be linked for pressure boosting
◐ Technical data
| Type | Motor | Motor load |
|---|---|---|
| FRI-3S-1.1 | 1.1 kW | 3.2 A |
| FRI-3S-1.5 | 1.5 kW | 4.3 A |
| FRI-3S-2.2 | 2.2 kW | 5 A |
| FRI-3S-4 | 4 kW | 9.3 A |
| FRI-3S-7.5 | 7.5 kW | 17.4 A |
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