Control panels with impedance start for pumps and motors.


Control panels suitable for starting high-power submerged pumps or pumping units for irrigation systems drawing water from deep wells.

General technical features

  • Power supply 3~50/60 Hz 400V ±10%;

  • Transformer 24 Vac for auxiliary circuit;

  • Auxiliaries contacts and circuits in low voltage;

  • Normally open contact for start;

  • Normally open contact for minimum level/pressure contact;

  • Selector for Auto-Off-Manual operation (manual stable):

    • Manual: direct operation without controls;

    • Automatic: operation with control by minimum and start contact;

  • Blue led indicating mains supply;

  • Green led indicating motor running;

  • Red led indicating motor overload;

  • Reactance with 4 startings/hour of which 2 consecutives;

  • Overload thermal relay internally restorable;

  • Adjustable impedance timer.

  • Line and impedance contactors in AC3;

  • Auxiliaries and motor protection fuses;

  • Isolator;

  • Steel enclosure, IP55;

  • Ambient temperature: -5/+40 °C;

  • Relative humidity 50% at 40 °C (not condensed).




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Impedance start type

Starting with stator reactors is suitable for electric pumps with cage rotor motors in which the voltage drop is produced by reactors placed in series with the stator in the starting phase.
The inrush current is limited to about half of that which would occur with starting at full voltage. At the end of the acceleration phase, the reactors are excluded (managed by a timer) and the motor returns to having the parameters relating to full voltage.

IMG_20200716_160203 (Grande).jpg


It is a system typically adopted for machines with high inertia that do not require particularly high torque and current values ​​at start-up.
The voltage applied to the pump is therefore minimal at start-up and gradually increases. This type of start-up is therefore particularly suitable for machines with resistant torque increasing with speed, such as fans or centrifugal pumps.
The elimination of the resistance at the end of starting takes place without interrupting the motor power supply, therefore without transient phenomena.


Serratura chiave (Grande).jpg


The entire REACTO series is offered as standard with an IP55 metal box, and a series of accessories and options are also available, including double door boxes and fiberglass enclosures.




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Via A. Meucci, 5-11, 35028

Piove di Sacco (PD) - Italia

Working      Hours 

Monday          08-12 / 13.30-17.30

Tuesday         08-12 / 13.30-17.30

Wednesday    08-12 / 13.30-17.30

Thursday        08-12 / 13.30-17.30

Friday              08-12 / 13.30-17.30

Saturday        closed

Sunday           closed


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VAT no. 04534630282

Cap. Soc. i.v. 100.000€

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MON - FRI 8.00-12.00 and 13.30-17.30