Redhead Electric Motors

General Description

NEMA B efficiency three phase induction motors are totally enclosed fan cooled squirrel cage motors that are manufactured with new material and technology.

Rating

Kind of motor: Squirrel-cage Induction Motor, NEMA B Design
Design Standard: NEMA MG1
Frame No: 213T ~ 449T.
Output Range: 1-300 HP
Ambient Temperature: 40 Cmax
Altitude 1000m
Duty: Continuous (S1)
Rated Frequency: 60Hz (50Hz is available on request).
Rated Voltage: 460V (380V is available on request).
Service Factor: 1.15 or 1.0
Protection Enclosure: TEFC, IP55
Cooling Method: Surface Cooling (IC411)

Application

NEMA B efficiency motors have some notable advantages such as high efficiency, good starting performance, low noise, improved structure, and improved cooling capabilities. These motors are three phase induction motors which can be used for general motors and may also be used to drive all kinds of general purpose machines such as compressors, ventilators, pumps, etc. Other uses include petrol chemical, medical, chemical industries and mining. For special requirements please contact our sales department.

Construction

Stator

The stator core is laminated with high quality electrical steel with high permeability and low losses allowing the motors to operate more efficiently.

The stator windings utilize Class F insulation (Class H insulation is available on request)with polyimide enamel round wire and VPI treated providing strong mechanical support, superior electrical insulation, misture and contamination resistance, and uniform heat dissipation.

Thermistors(PTC) are embedded in windings (Thermostats are available on request), one each phase.

Rotor

The squirrel-cage totors are of cast aluminum alloy. fixed on the shaft by means of hot fit. The rotor is dynamically balanced to reduce vibration.

Frame size	Drive end bearing	Non-drive end bearing
NEPM14	6206-2Z	6206-2Z
NEPM18	6207-2Z	6207-2Z
NEPM21	6208-2Z	6208-2Z
NEPM25	6309	6309
NEPM28	6311	6311
NEPM32	6312	6312
NEPM36	6313	6313
NEPM40	2P: 6313 \| 4,6P:6318	2P: 6313 \| 4,6P:6318
NEPM444-445	2P: 6314 \| 4,6P: NU319	2P: 6314 \| 4,6P: NU319
NEPM447-449	2P: 6314 \| 4,6P: NU319	2P: 6314 \| 4,6P: NU319

Bearing and lubrication

The motors are fitted with low noise and low vibration bearing special for motors. For the motors in frame size 210, bilaterally shielded ball bearing are used without replenishing grease. For the motors in frame sizes 250 and above, the open bearing are equipped with attachments having the function to drain and replenish lubricating grease without stopping the motor. No. 3 Lithium Base grease is used unless specified otherwise. Bearing design life is at least 40000 hours at rated load. Bearing size, see table 1.

Conduit Box

The conduit box is on the central libe of the enclosure. It can be F1/F2 convertible. The conduit box is made of cast iron and the opening utilizes Standard NPT threads (Metric threads and holes are available on request). There are grounding bolts and a connection diagram inside the conduit box.
Motor main leads and thermistor leads are loose keeping in conduit box (Therminal blocks are available on request).

Fan and Fan Cover

The fan is made of plastic or cast iron to different applications. The fan cover is made of steel sheet or cast iron depending on different operating conditions.

Sunshade

A sunshade is recommended when the motor is intended for outdoor installation in direct sunlight with an ambient temperature rating of over 40 degree C.

Electric Motor Specs

NEMA B Motor	Description	Product ID
5HP	6P 215T 60HZ 230/460V	RH0056
10HP	6P 256T 60HZ 230/460V	RH0106
15HP	6P 284T 60HZ 230/460V	RH0156
20HP	6P 286T 60HZ 230/460V	RH0206
25HP	6P 324T 60HZ 230/460V	RH0256
30HP	6P 326T 60HZ 230/460V	RH0306
40HP	6P 364T 60HZ 230/460V	RH0406
50HP	6P 365T 60HZ 230/460V	RH0506
60HP	6P 404T 60HZ 230/460V	RH0606
75HP	6P 405T 60HZ 230/460V	RH0756
100HP	6P 445T 60HZ 230/460V	RH1006
150HP	6P 449T 60HZ 230/460V	RH1506

If you’re looking for peace of mind with your pumping equipment purchase, you’ve come to the right place. Contact Redhead Artificial Lift to get started.

Call (587) 605-1061 Today