Submersible motor pumps (100 mm)
6
3.9
Interruptions / Shutdown periods
In order to ensure a long motor service life, pumps should not be
allowed to remain idle in water for more than 8 to 10 days.
Otherwise fine deposits like lime, iron and other substances tend
to settle in the bearings and impeller gaps. This might block the
pump rotor. In case the situation is unavoidable, it is
recommended to run the pump for at least 10 to 15 minutes every
week. This will enable the pump to resume instant service at
any time.
4
UMT (S) 100 motors
Special attention on following points is required :
4.1
The motor is hermetically sealed induction
motor
It is pre-filled with liquid at works with rotor and bearings being
lubricated and cooled by the filled liquid. The motor is designed
for vertical and horizontal location in clean water, with a maximum
sand content of 50 g/m
3
. The maximum installation depth is 300
m.
4.2
Connecting the motor
4.2.1 Starter panel (Refer fig. 5)
Starter Panel
Recommended circuit diagram for UMT (S) motors (1 ø, 220 V, 50 Hz supply)
Legend :
Abbrevation
Description
B R Y
Motor terminals
P
Phase
N
Neutral
E
Earth
C
Common terminal
M
Main winding
A
Auxillary winding
OLR
Overload relay
PB1
Start push button
PB2
Stop push button
IL
Inter locks if any
T1
Start timer
K1
Contactor
C2
Start capacitor
(Electrolytic type)
C1
Run capacitor
(Polypropylene type)
Fig. no. 5
Capacitor values :
UMT (S) 100
Motor capacity
Run Capacitor
Start Capacitor
(kW)
(C1)
µµµµµ
F
(C2 )
µµµµµ
F
0.37
16
100-120
0.55
20
100-120
0.75
26
100-120
1.1
36
100-120
1.5
40
100-120
