DC Buyer's Guide

Pump Motors CD180AT through CD6900 Frames

DESCRIPTION – Pump Motors

DC Motors with armature voltages from 105-130 Volts in most cases are used in pump applications. These are special motors built to pump manufacturer specifications. Because of the low armature voltage these motors have special electrical designs and in many cases frame sizes are larger than standard. If a model number is not available, a request for motors in this voltage range must be accompanied by the following information. Pump motors operated from DC potential busses or batteries will show significant speed variations from nominal when the motor is cold and when the applied voltage varies below nominal.

Typically Motor RPM will be lower than nameplate speed (approximately 10-15%) when cold and increase to name- plate RPM as main field reaches operating temperature. To reduce the cold to hot speed variations, the shunt fields should be energized at 50 to 70% of rated voltage to stabilize. However, for ‘emergency’ pump motor applications, where field pre-heating may not be feasible, the pump capacity must be sized to the cold start RPM. Also at lower than nominal voltage the motor will run slower than nameplate RPM, while conversely the motor will run higher than nameplate RPM when voltage is higher than nominal.

Modifications Motor Pricing General Information Where Used: Customer: PUMP FORM

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Altitude

Feet (Standard is 3300 feet)

Temperature Rise:

Accessories and

Horsepower:

Base Speed:

S Class F

S Class B

Enclosure:

S DPFG

S TENV

S TEFC

Service Factor: S 1.0

S 1.15

S Explosionproof

S Waterproof

Rotation:

S CW

S CCW

S Reversing

Duty:

S Cont .

S 60 Min.

S 30 Min.

Space Heater: Heater Voltage S 120V

Power Supply: S Battery

S Constant Voltage

S 240V

S Other

Armature Voltage:

Volts

Thermostat:

S N.C.

S N.O.

S None

Field Voltage: Volts If Battery Supply: Anticipated Voltage Swing From Nominal +/– What %? Minimum Cold Running Speed and Voltage

Conduit Box: S Waterproof Conduit Box Location: (as viewed from comm end of motor) S Right Side S Left Side S Top Mounting: S Vertical Shaft Up S Standard S Oversize

Information Outline Dimensions

RPM

Voltage

Mounting Flange S C-Face

S Vertical Shaft Down

(If required)

S D-Flange

Field Winding: S Shunt

S Compound

S Stabilized Shunt

S Horizontal

S P-Base

Drawings must be supplied for P-Base

Application

Other Information

1.12

www.gemotorswolong.com GEP387-EN 07/19 Prices and data subject to change without notice.