Connection
This motor can be used on 400 VAC or 690 VAC systems. A wiring diagram indicates the proper connection for the input power leads. The low voltage connection is intended for use on 400 VAC with a maximum full load current of 29 Amps. The high voltage connection is intended for use on 690 VAC with a maximum full load current of 17 Amps.
Base speed Motor
Base speed is the nameplate speed, given in RPM, where the motor develops rated horsepower at rated voltage and frequency. It is an indication of how fast the output shaft will turn the connected equipment when fully loaded and proper voltage is applied at 50 hertz. The base speed of this motor is 1430 RPM at 50 Hz. If the connected equipment is operating at less than full load, the output speed will be slightly greater than base speed.
It should be noted that with European and Asian motors and many special motors, such as those used in the textile industry, base speed, frequency and voltage may be different than standard American motors. This is not a problem, however, because the voltage and frequency supplied to a variable speed drive does not have to be the same as the motor. The supply voltage to a variable speed drive has nothing to do with motor voltage, speed or frequency. A variable speed drive can be set up to work with any motor within a reasonable size range and rating.
Insulation Class Type
The National Electrical Manufacturers Association (NEMA) has established insulation classes to meet motor temperature requirements found in different perating environments. The four insulation classes are A, B, F, and H. Class F is comonly used. Class A is seldom used. Before a motor is started, its indings are at the temperature of the surrounding air. This is known as ambient temperature.NEMA has standardized on an ambient temperature of 40° C, or 104° F for all motor classes.
How To Convert KW to HP
Motor manufacturers may also use kilowatts (KW) instead of horsepower. To convert KW to HP use the following equation:
HP = 1.341 x 15 KW
HP = 20,115 HP
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