SIEMENS
Introduction
General technical data
1/8
Siemens D 86.2 · 2007
1
■
Electrical design
Speeds
The rated motor speeds (rpm)
• 200
• 300
• 400
• 500
• 600
• 800
describe the transition speeds of the motor design.
Above the transition speed, a field weakening range of up to
20% is possible (e.g. a motor with a rated speed 500 rpm can be
operated up to 600 rpm).
Voltages and frequencies
EN 60034-1 differentiates between Category A (combination of
voltage deviation ±5% and frequency deviation ±2%) and
Category B (combination of voltage deviation ±10% and fre-
quency deviation +3/–5%) for voltage and frequency fluctua-
tions.
The motors can supply their rated torque in both Category A and
Category B. In Category A, the temperature rise is approx. 10 K
higher than during normal operation. According to the standard,
longer operation is not recommended for Category B.
The tolerance for HT-direct motors is in accordance with
DIN EN 60034-1 in all cases. A rated voltage range is, therefore,
not specified on the rating plate.
Windings and insulation
For the versions with windings of round wire, the well-proven
DURIGNIT 2000 insulation system in temperature class 155 is
used. Frame sizes
≥
450 have shaped-coil windings whose in-
sulation system is based on the same materials and whose wind-
ing design is adapted accordingly.
The components of the insulation system are
•
Varnish or mica-insulated round or flat wires for the winding
insulation
•
Multi-layer flat insulation material for the slot and phase insu-
lation
•
Solvent-free impregnated resin
The high-quality materials offer resistance to continuous high
temperatures approaching temperature class 180.
An impregnation technique optimized for the winding design is
used that ensures a minimum resin fill level in the slot.
This ensures:
•
The required mechanical stiffness of the winding in the vicinity
of the slot and windings
•
The quality of heat dissipation to the laminated core and the
internal air circulation
•
Protection of the winding from environmental effects such as
humidity or corrosive chemicals.
Utilization
With the insulation system used under normal converter-fed
operation, the motors are utilized according to temperature
class 155 (previously: temperature class F).
■
Motor connection and connection boxes
Connecting cables
For motor currents that exceed the maximum current carrying
capability of 1230 A of a terminal box, two galvanically isolated
winding systems are equipped with two 1XB1 631 terminal
boxes (for assignment, see the section “Selection and ordering
data”).
The connecting cables must be dimensioned acc. to
DIN VDE 0298.
Characteristics of the 1XB1 631 terminal box
Terminal box 1XB1 631
The possible mounting positions for the terminal boxes on the
water-cooled or air-cooled motors are described in Sections 2
and 3.
Characteristics of the optional auxiliary terminal box
Line voltages
690 V, 50 Hz
400 V, 50 Hz
460 V, 60 Hz
Voltage code
(11th position of the Order
No.)
7
8
4
Number of terminals
Quantity
12
Contact screw thread
Size
M16
Max. rec. conductor cross-section
mm
2
240
Outer cable diameter
(sealing range)
mm
56 ... 68.5
Cable entry holes
Size
4 x M80 x 2
Cable glands (option
K57
)
Size
4 x M80 x 2
Z58 – Z67
Number of terminals
Quantity
24
Outer cable diameter
mm
11 ... 16
Cable entry holes
Size
2 x M20 x 1.5
Cable glands (option
K57
)
Size
2 x M20 x 1.5