Speck pumpen SUPI, Translation Of Original Operation Manual

Page: 56 / 84

Description
14 EN 09|2017
3.2 Ambient temperature of the motor
The underwater motors are designed for operation with a nominal
load in water up to 30 °C. They require a minimum coolant
velocity along the motor of 8 cm/s for 4” motors and 16 cm/s for 6”
motors.
Determining the minimum coolant quantity along the motor
0 6 12 16 24 30 36 42 48 54 60 66 Q [m³/h]
Q [l/min] 900 1000 1100 400 500 600 700 800 0 100 200 300
0
10
20
30
40
50
60
Max. cooling diameter in cm
KL51.0.012-2-P
Example:
Well Ø20 cm
Motor: Ø4“
Minimum coolant quantity = 120 l/min
Should the quantity fall below that of the minimum coolant
quantity (for example in standing water), a cooling jacket must be
used.
3.3 Ambient temperatures for 1~-start-up devices
A temperature from -20 °C to +40 °C is permitted.
Should these temperatures be exceeded, the switching devices
must be protected accordingly. The cold reduces the capacity of
the capacitor and therefore also lowers the starting torque.
Too strong a heat exposure will result in unnecessary deactivation
of the thermal motor protection.
The protection class of the start-up device is IP54.