Siemens Induction motors/ generators CGII - Manual (Page 5)

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Introduction
Handling
Lifting devices are provided for handling only. An
experienced rigger should be used to install motors.
To avoid damage, the use of spreader bars is recommended
on other than single point lifts. Lifting devices are provided to
facilitate handling with shackles and cables. Avoid pounding
or bumping shaft, coupling or bearing parts, as shocks may
damage bearings.
NOTE WEIGHT BEFORE LIFTING. The weight is indicated
on the outline drawing. Apply tension gradually to cables.
Do not jerk or attempt to move the unit suddenly.
Motor Weights (in pounds)
Frame Size Minimum Maximum
500 2300 5400
580 4300 8400
680 10000 20000
800 15000 31000
1120 26000 37000
Temporary Storage
If the equipment is not to be installed and operated soon after
arrival, store it in a clean, dry, well- ventilated place, free from
vibration and rapid or wide variations in temperature. Rotate
the shaft a minimum of 10 complete turns by hand each
month to coat the bearings with lubricant which will retard
oxidation or corrosion, and prevent possible false brinelling.
If drain plugs are provided in enclosed motors, they must be
removed periodically to drain any water accumulation from
the motor. Consider a unit in storage when:
1. It has been delivered to the job site and is awaiting
installation.
2. It has been installed but operation is delayed over 30
days pending completion of plant construction.
3. There are long (30 day) periods between operating
cycles.
4. The plant (or department) is shut down for 30 days.
NOTE
Storage requirements vary, depending on the length of
storage and the climate. For storage periods of three
months or longer or climate variations, consult Siemens
Storage Recommendations ANIM-03114. Storage
maintenance is to be documented for warranty
information.
Type Designations
The motor type designation consists of a basic letter or
letters indicating the motor enclosure type to which other
letters may be added denoting modifications.
Motor Type Motor Enclosure
CG or NCG
Open Drip Proof or Weather
Protected Type I
CGII or NCGII Weather Protected Type II
Ventilation
Type CG, NCG - 500 Frame
Ventilating air enters through the louvered openings in
bearing housings on both ends of the motor. Non-metallic air
baffles direct air to the rotor fans and through the rotor core.
The air is circulated around the stator coil ends, into the air
gap, and through the vent ducts in the rotor and stator cores.
The air is exhausted out of the motor through the louvered
openings on both sides of the motor. Refer to motor outline
drawing for specific air intake and exhaust locations.
Type CG, – 580, 680, & 800 Frame and
Type CGII, NCGII – 500, 580, 680, & 800 Frame
Ventilating air enters through both sides of the top enclosure.
Non-metallic air baffles direct air to the rotor fans and through
the rotor core. The air is circulated around the stator coil
ends, into the air gap, and through the vent ducts in the rotor
and stator cores. The air is exhausted out of the motor
through the openings on both sides of the motor. Refer to
motor outline drawing for specific air intake and exhaust
locations.
Type CG - 1120 Frame
Ventilating air enters through one end of the top cover. A
single rotor fan pulls the air through the rotor and stator
cores. The air is circulated around the stator coil ends, into
the air gap, and through the vent ducts in the rotor and stator
cores. The air is exhausted out of the motor through the top
cover on both sides of the motor. Refer to motor outline
drawing for specific air intake and exhaust locations.
Type CGII - 1120 Frame
Ventilating air enters through both sides of the top cover. A
single rotor fan pulls the air through the rotor and stator core.
The air is circulated around the stator coil ends, into the air
gap, and through the vent ducts in the rotor and stator cores.
The air is exhausted out of the motor through the openings
on both sides of the motor. Refer to motor outline drawing for
specific air intake and exhaust locations.