Control Panel Wiring; 7.4 Thermal Protection Wiring; Changing The Direction Of Rotation - VARISCO K Serie Instrucciones Para El Uso Y La Manutención

a phase symbol as shown below. The measured resistances are interdependent on
each of the phases being measures and only one reading should be 0 Meg-Ohm
(see fig. 7 below). If not to avoid motor damage do not operate the pump.
7.2.1.4 When checking pumps wired Star-Delta to D.O.L or Reactor, Follow the table below.
U,Z (1,6) -- ➔ R
V,X (2,4) -- ➔ S
W,Y(3,5) -- ➔ T
7.2.2 To Check Sensor Wiring
7.2.2.1 Motor Protection Sensor
There are two wires, both white and the identification marking is TP (Thermal
Protection). Connect one of the wires to a Multi Tester. The resistance measured
must be 0 Ohm. In any case, do not use Mega Tester. If measured by Mega Tester,
the sensor might be damaged and would not operate properly (Fig. 8).
7.2.2.2 Leakage Sensor
There are two wires, both black and the identification marking is SS (Seal Sensor).
The resistance measured with a multimeter should be over 20 Kilo Ohm. (Do not use
Mega Tester for this test) (Fig. 9).
7.2.2.3 Bearing Temperature Sensor
There are two wires, both red and the identification marking is BS (Bearing Sensor).
The resistance measured with a multimeter should be between 100 Ohm-120 Ohm.
Tested by Multi Tester. (Do not use Mega Tester for this test).
7.3 CONTROL PANEL TERMINAL WIRING
7.3.1 Wiring of Inlet, Outlet and Motor Protector
7.3.1.1 Direct On Line (D.O.L) - Fig. 13
7.3.1.2 Star - Delta - Fig. 14

7.4 THERMAL PROTECTION WIRING

Most VARISCO control systems are equipped with thermal protection. There are two types
one is installed in the motor and the other in the control panel (Except for KP type).
POSITION CONTROL TYPE
In Motor Current Control
In Control Thermal Control
Panel
7.5

CHANGING THE DIRECTION OF ROTATION

To change the direction of rotation, interchange two of the phases in the control panel as
shown below.
7.5.1 Direct On Line - Fig. 11
7.5.2 Star-Delta - Fig. 12
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ENGLISH
K
OUTPUT
Under
3,7 kW
Over 5,5 kW
PROCESS
When overload current flows,
motor protector stops pump.
If motor temperature rises
above 100 o C the device operates
and disconnects the circuit inl
the Control Panel.(for B Class
Insulation).
WIRES
Not exposed
1,25-2,0
sq mm
(White)
19