SIEMENS
2/90
Siemens D 83.1 · 2016
2
Motors with Explosion Protection
LOHER CHEMSTAR and VARIO 1PS1 motor series
General information
■
Technical specifications
LOHER CHEMSTAR and VARIO 1PS1 motor series, type of
protection "Non-sparking"
The LOHER CHEMSTAR and VARIO motors of the 1PS1 series
are fully-enclosed, surface-cooled motors in the "Non-sparking"
type of protection Ex nA II. In these motors, the type of construc-
tion prevents the occurrence of arcing, sparks or hot surfaces
during normal operation, ensuring that the required level of
safety is maintained. The CHEMSTAR motors can be designed
in accordance with the applicable VIK specifications
("Verband der Industriellen Energie- and Kraftwirtschaft e. V.",
the Association of the Industrial Energy and Power Industry).
The motors are assigned to device group II – category 3G
(corresponding to Zone 2) and are approved and optimized
for use in hazardous areas of Zone 2 in accordance with
EN 60079-0 and EN 60079-15. The motors are marked
according to EN 60079-15 with II 3G Ex nA IIC T3 Gc for
use in Zone 2.
General technical specifications
LOHER CHEMSTAR and VARIO 1PS1 motors
Motor type
A..K
Frame size
90 … 500
Powers
0.25 … 1120 kW
Temperature class
T3
Type of protection
II 3G Ex nA IIC T3 Gc, IEC/EN 60079-15
Ex zones
Gas Zone 2 optional, Dust Zone 22/21
Guidelines
2014/34/EU
Cooling
Surface-cooled, water-jacket-cooled on
request
No. of poles
2- to 12-pole, multi-pole + pole-changing
versions on request
Voltage/frequency
All common voltages, in 50 Hz and
60 Hz special designs on request
Degree of protection
IP55 to IP68
Type of construction
All common types of construction +
special types of construction
Enclosure
Cast-iron or steel
Insulation
Class F utilized according to B
Special versions
• For outdoor temperatures -55 to +60 °C
(other temperatures are available on request)
• Installation altitude up to 3000 m (> 3000 m on request)
• Modified windings, for example, for increased ambient temperatures,
installation altitude for optimum electrical values
• Permanent load S1 as well as partial load operation, e.g. S2/S3/S6
• Drive-end located bearing; special bearing for increased axial/radial
forces
• Large electrical variance, such as reduced starting current, modified
torque curve, star-delta start-up, etc.
• CHEMSTAR: Copper rotor as an option
• Metal fan in aluminum, steel or brass
• Monitoring devices such as Pt100, PTC, KTY winding/bearing,
vibration monitoring, etc.
• Country-specific certificates such as EAC (Eurasian Customs Union),
NEPSI (China), China Energy Label, CCOE (India),
IECEx (international)
• Version for offshore, on-deck and/or marine classifications
• Combination with brakes + encoder + forced ventilation
• Enlarged connection system and/or larger terminal box for large cable
cross-sections
© Siemens AG 2016