Siemens S120 configurationmanual Data, precision motor cooler, ΔTp

Technical data and characteristics

14.1 Explanations of the formula abbreviations

3UHVVXUHGURSDWUHFRPPHQGHGPLQLPXP YROXPHIORZUDWHDFFRUGLQJWRGDWDVKHHW

˂SLQEDU

9LQOPLQ

Figure 14-3 Sample characteristic: "Pressure losses in the main cooler over volume flow rate"

Data, precision motor cooler

QP,MAX

P,MIN

ΔTp

˂7.LQ

Maximum heat loss dissipated via the precision cooler when the motor is utilized up to the rated torque MN and at the rated temperature TN.

Recommended minimum volume flow rate in the precision cooler to achieve a minimum temperature increase on the mounting surface of the stator vis-à-vis

TVORL.

The temperature increase of the coolant between the intake and return flow circuit of the precision cooler at operating point QP,MAX and P,MIN can be estimated using the following formula:

Average water density: ρ = 1000 kg/m3

Average specific thermal capacity of water: cp = 4.18 · 103 J/(kg K)

Temperature deviation from intake temperature: ΔTP in K

Volume flow: in m3/s

&RROLQJPHGLXPWHPSHUDWXUHLQFUHDVHDWUHFRPPHQGHG PLQLPXPYROXPHIORZUDWHDFFRUGLQJWRGDWDVKHHW

9LQOPLQ

Figure 14-4 Sample characteristic "Temperature increase of the coolant between the inlet and return flow circuit of the precision cooler"

180	1FW6 Built-in torque motors
	Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3