During World Water Week, we want to highlight the value of this precious commodity, water.
In concrete terms, 70% of the world’s water consumption is used to irrigate crops, playing a key role in food production and security.
The intensity of irrigation varies from country to country depending on the climate, the type of crop, and the methods used.
The water used in agriculture comes from both natural and alternative sources, and the use of these resources must be done sustainably.
A correct irrigation system involves a good choice of water pump, which must be adjusted to the needs of the land, water flow, and type of irrigation.
Pumps must be reliably protected for their efficient operation, so at Fanox, we have a range of top-quality Protection & Control Relays for submersible pumps without level sensors.
Fanox, one of the main specialists in the world on electronic protection engines, has designed a complete range of electronic relays for submersible and surface-mounted pump protection that covers almost all the needs of the pumps without changing brand.
Fanox relays are much more reliable and affordable than those used with level sensors and are the only ones in the market that control the three phases of the motor supply, protecting from empty pumps, cavitation, etc. Indeed, they are also the only ones with thermal image, and this is very important because they control with accuracy the heating and cooling of the pump during all cycles, starting, working, and stopping cycles. This feature makes it almost impossible to burn up a pump.
We have verified that many devices only protect one phase, which can sometimes bring serious problems. We have a complete and specific study on the advantages of electronic protection versus protection with level sensors available for all those customers who request it.
Pump Protection & Control Relays
PF-R – Pump Protection | Three phases by COS φ
- No need for level sensors to detect dry running
- Designed for 3-phase motors from 1 to 630 A and over.
- Precise motor heating and cooling memory
- Thermal image
- The visual indicator of tripping cause
- Adjustable reset time for cos φ
P – Pump Protection | Three phases by Undercurrent
- No need for level sensors to detect dry running
- Designed for 3-phase motors from 1 to 630 A and over.
- Precise motor heating and cooling memory
- Thermal image
- The visual indicator of tripping cause
- Manual, remote and automatic reset
PS-R – Pump Protection | Single Phase
- No need for level sensors to detect dry running
- Designed for 1-phase motors from 3 to 16 A
- Precise motor heating and cooling memory
- Thermal image
- The visual indicator of tripping cause
- Adjustable reset time for I<
- Monitoring the undercurrent avoids problems caused by dry running, cavitation, etc.
Pump Protection & Control Panels
One of the most critical situations in pump operation is dry running. The solution offered by FANOX single-phase protection panels is based on measuring the undercurrent. In dry running situations, a current decrease is detected. This reduction of consumed current is measured by the PS-R electronic relay fitted to the protection panel: when the preset undercurrent value is reached, it switches the pump off.
The cosine of phi (Cos φ) is the cosine value of the phase angle between the voltage and the intensity of the electrical current. This oscillates from a value slightly below 1 for a full load operating motor to almost 0 when it is dry running.
Therefore, in dry running situations, cos φ falls significantly. This reduction is monitored by the PF-R relay installed in FANOX three-phase protection panels, meaning that when it falls beneath the adjusted value, the panel shuts down the pump and protects it from damage.
CBS – Three Phase Panels with Soft Starter
Fanox protection panels with progressive startup and shut-down are fitted with ES soft starters to prevent problems caused by water hammering or sudden start-ups and shut-downs.
Protection against dry running is provided by the PF-R relay that monitors the value of cos φ and shuts down the pump when it falls below the selected value.
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