SIEMENS
1/10
Siemens D 84.9 · 2015
1
Introduction
Type selection
■
Overview
Basic considerations when selecting a motor
•
Ambient conditions: Temperature, moisture, altitude
•
Type of driven load and moment of inertia
•
Starting frequency and voltage drop
•
Duty type and other special requirements
•
Temperature rise
•
Direction of rotation
•
Sort of coupling
•
Position of the terminal box
The influence of ambient temperature and altitude on power
rating
1RA1/1RP1
1RN1
1RQ1
Guideline for coupling selection
•
The A-compact PLUS motors are designed for operation with
a flexible coupling.
•
Motor and driven machine have to be aligned according to
manual.
•
The maximum half coupling weights of A-compact PLUS are
shown in the table below.
•
If the coupling weight exceeds the maximum value, the feasi-
bilty has to be checked.
Normal conditions
Selection and ordering data included in this chapter are valid for
standard operating and installation conditions:
7
Installation altitude of the motor
≤
1000 m above sea level
7
Ambient temperature (= coolant temperature for air-cooled
motors) = 40 °C
7
Coolant temperature for water-cooled motors = 25 °C
7
Thermal class 155 (F), utilized to 130 (B)
7
Continuous duty S1
7
Permissible tolerances in compliance with IEC/EN 60034-1:
- Rated voltage
V
rated
± 5 %
- Rated frequency
f
rated
± 2 %
The A-compact PLUS series is designed to be directly switched-
on when certain starting conditions are maintained.
Motor starting does not have to be separately checked if the
following criteria are maintained:
7
The voltage when starting does not drop below 0.9 x
V
rated
.
7
The load torque increases approximately with the square of
the speed (T ~ n
2
).
7
The maximum load torque does not exceed 50 % of rated
torque at rated speed.
Start-up with max. permissible inertia according to
"selection
and ordering data" is possible either for three times from cold or
two times from warm motor condition (natural coast down be-
tween consecutive starts assumed).
If limits of load characteristic and/or inertia are exceeded, the
motor start-up calculation has to be checked. In this case,
please contact your Siemens sales representative.
Cooling air
temperature
Site altitude above sea level
1000 m
1500 m
2000 m
2500 m
3000 m
40 °C
100 %
96 %
93 %
O. r.
1)
O. r.
1)
45 °C
96 %
92 %
88 %
O. r.
1)
O. r.
1)
50 °C
91 %
87 %
83 %
O. r.
1)
O. r.
1)
55 °C
86 %
82 %
77 %
O. r.
1)
O. r.
1)
Water intake
temperature
Site altitude above sea level
1000 m
1500 m
2000 m
2500 m
3000 m
25 °C
100 %
96 %
93 %
O. r.
1)
O. r.
1)
30 °C
96 %
92 %
88 %
O. r.
1)
O. r.
1)
35 °C
91 %
87 %
83 %
O. r.
1)
O. r.
1)
40 °C
86 %
82 %
77 %
O. r.
1)
O. r.
1)
Cooling air
temperature
Site altitude above sea level
1000 m
1500 m
2000 m
2500 m
3000 m
40 °C
100 %
96 %
92 %
O. r.
1)
O. r.
1)
45 °C
96 %
91 %
86 %
O. r.
1)
O. r.
1)
50 °C
90 %
85 %
80 %
O. r.
1)
O. r.
1)
55 °C
84 %
78 %
73 %
O. r.
1)
O. r.
1)
Motor tpye
Frame size
Pole number
Maximum
weight of half
coupling
1R.1
355
-2
50 kg
-4
60 kg
-6/-8
90 kg
400
-2
50 kg
-4
90 kg
-6/-8
140 kg
450
-2
60 kg
-4
140 kg
-6/-8
140 kg
500
-2
90 kg
-4
210 kg
-6/-8
250 kg
560
-2
170 kg
-4
300 kg
-6/-8
410 kg
630
-2
250 kg
-4
470 kg
-6/-8
620 kg
1)
On request
© Siemens AG 2015