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.

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