Baumuller DSC1-045-100 Series - 1.3. Definitions, Ratings, and Cooling

Three-phase synchronous motors DSC1-045-100
DSC1-045-100
11/2016
Technical alterations reserved
Baumüller Nürnberg GmbH
7
1.3. Definition of ratings
1.3.1. Definitions of power ratings for air-cooled machines
The power ratings (torques) listed in the table applies to continuous operation (S1) at the rated speed and a
maximum ambient temperature of 40°C, for machines installed below 1,000 m a.m.s.l.
If motors are to be operated at an ambient temperature of more than 40°C, or altitudes above 1,000 m a.m.s.l.,
the required list power rating P
L
(list torque M
r
) is calculated from the product of factors k
1
and k
2
(specified in
the table below) and the required power rating P (torque M).
Ambient temperature
40°C
45°C
50°C
55°C
60°C
Correction factor k
1
1
1.06
1.13
1.22
1.34
Altitude a.m.s.l. up to
1.000 m
2.000 m
3.000 m
4.000 m
5.000 m
Correction factor k
2
1
1.07
1.16
1.27
1.55
Design changes may be necessary in the case of ambient temperatures above 40°C and installation of motors
in an enclosure: For this reason, it is imperative that the manufacturer is contacted.
If, in the case of an increasing site altitude above 1.000 m, the ambient temperature decreases by approx.
10°C per 1.000 m increase, no power correction is necessary (note the minimum operating temperature).
1.3.2. Definitions of power ratings for water-cooled machines
The power ratings (torques) that appear in the list apply to permanent operation S1 at nominal speed, provided
the cooling circuit requirements for water-cooled motors are met!
The reduction factors included in the table below must be considered when operating DSC motors with higher
coolant inlet temperatures:
Coolant inlet temperature
25 °C
30 °C
35 °C
40 °C
45 °C
Percentage of list performance (torque)
100 %
97 %
95 %
92 %
89 %
1.4. Water cooling
1.4.1. Coolant consistency
The coolant must satisfy the following specifications:
Conditions
Unit
Value
Maximum permitted system pressure
bar
6
Temperature of coolant - for motor
° C
10 to 25
pH value (at 20° C)
---
6.5 to 9
Overall hardness
mmol/l
1.43 to 2.5
Chloride - Cl
-
mg/l
< 200
Sulphate - SO
4
²
-
mg/l
< 200
Oil
mg/l
< 1
Permitted particle size
of solid foreign objects, particles (e.g. sand)
mm
< 0.1
Clean water that is free of dirt and suspended matter must be used as a coolant.