K-Series
I/O Manual
Prepared by.
Rev. No.
0
Date.
11-Jan-11
Page.
18 / 25
6.3.1.2 Direct On Line (D.O.L) Connect one of the three phase wires to the
Earth Link of a Mega Tester and measure the insulation resistance of the
remaining two wires. The insulation resistance should be infinity (see
fig 14 below). If not, to avoid motor damage do not operate the pump.
6.3.1.3
Star-Delta Starting Connect one of the six wires to the Earth Link of a
Mega Tester and measure the insulation resistances between the
remaining five wires and attach 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. 14
below). If not avoid motor damage do not operate the pump.
DOL SD STARTING
6.3.1.4 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
6.3.2 Insulation check of Sensor Wiring
6.3.2.1 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. 15
