84873401 Crouzet USA, 84873401 Datasheet - Page 113

• Manufacturer Part Number: 84873401
• Description: 3X400VAC FFP MOTOR LOAD CONTROL
• Manufacturer: Crouzet USA

Specifications of 84873401

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For more information www.crouzet.com
Principles
Emptying control
Max.
Min.
Max.
Min.
Un
B
C
D
E
2
3
4
Push button
Well
Tank
Output relay
1
1
1
1
Operating principle
Control of maximum and/or minimum levels of conductive liquids (tap water, sea water, waste
water, chemical solutions, coffee etc).
The principle is based on measurement of the apparent resistance of the liquid between two
submerged probes. When this value is lower than the preset threshold on the unit front face, the
output relay changes state. To avoid electrolytic phenomena, an AC current funs across the
probes. Applications found in environmental, chemical industries and food technology etc.
Combined Fill / Empty function
The output relay changes state when the level of liquid in the tank reaches the "max" electrode,
with the "min" electrode submerged. It returns to its initial state when the "min" sensor is no longer
in contact with the liquid.
When the level of liquid in the well reaches the "min" electrode, the pump stops.
If, on power-up or after a power break, the "max" electrode in the tank is above the surface, reset
the device by pressing the PB pushbutton.
Note
The probe wire (maximum 100 metres) does not have to be screened, but avoid mounting it in
parallel with the power supply wires. A screened wire can be used, with the screening connected to
the common.
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