Three Phase Electrical Connection; Thermal Probes; Conductivity Probes - Zenit GRS Manuel D'utilisation Et D'entretien

SINGLE-PHASE electrical connection fig.3-4

8.2 THREE PHASE ELECTRICAL CONNECTION

Connect the yellow-green lead to earth and supply the motor pump output leads. If the motor pump has 3 leads they
must be connected to a three phase line with voltage and frequency equal to that indicated on the data plate, or to a
control panel with devices to reduce the initial current. If the motor pump has 6 leads they must be connected to a
control panel with a Y/delta switching device. If the connection is made directly to the delta the supply voltage is the
lower of those indicated on the data plate; if the connection is made to the Y the voltage is the higher of those
indicated. The supply leads are marked as follows:
- 3 leads U – V – W;
- 6 leads U1 – U2 – V1 – V2 – W1 – W2;
THREE-PHASE electrical connection fig. 5

8.3 THERMAL PROBES

Thermal protection is incorporated in the motors and resets automatically in the single phase versions and in the
three phase versions equipped with thermistors or remote control switches. In the three phase versions without
remote control switches the thermal protection, where present, is connected to the motor pump outlet leads labelled
T. The thermal protection must be connected to the corresponding terminal on the control panel.

8.4 CONDUCTIVITY PROBES

Where present the conductivity probe is inserted in the oil chamber and connected to the motor pump output lead
labelled S. The probe must be connected to the corresponding terminal on the control panel.
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