Siemens 680 - 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
CGG or NCGG
Totally Enclosed
Water to Air Cooled
CAZ
Totally Enclosed
Air to Air Cooled
Ventilation
Type CGG, NCGG – 500 Frame and
Type CGG – 580, 680, 800 & 1120 Frame
The heated internal air from the hot stator core is directed to
an internally mounted heat exchanger where it is cooled and
recirculated back into the motor in a closed cooling loop. The
cooled internal air enters the motor from the heat exchanger
and non-metallic air baffles direct the air to an internal rotor
fan that circulates it through the rotor core, around the coil
ends, into the air gap, and through the vent ducts in the rotor
and stator cores. Heated air is exhausted through internal
openings in both sides of the motor and is directed to the
heat exchanger in the motor top cover. The hot internal air is
circulated over the finned surface of the heat exchanger. A
steady flow of cooling water provided by the customer enters
and exits the heat exchanger. Refer to motor outline drawing
for specific water inlet and outlet locations.
Type CAZ – 580, 680, & 800 Frame
The heated internal air from the hot stator core is directed to
an internally mounted heat exchanger where it is cooled and
recirculated back into the motor in a closed cooling loop. The
cooled internal air enters the motor from the heat exchanger
and non-metallic air baffles direct the air to an internal rotor
fan that circulates it through the rotor core, around the coil
ends, into the air gap, and through the vent ducts in the rotor
and stator cores. Heated air is exhausted through internal
openings in both sides of the motor and is directed to the
heat exchanger in the motor top cover. The hot internal air is
circulated over a series of cooling tubes in the heat
exchanger. A steady flow of cool ambient air is blown through
the cooling tubes by a shaft mounted external fan or an
auxiliary blower mounted on the heat exchanger. Refer to
motor outline drawing for specific air intake and exhaust
locations.