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.

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