Operated uncoupled from driven equipment

U.S. ELECTRICAL MOTORS INSTALLATION AND MAINTENANCE

Initial

Installation

5. Reversing Rotation

The direction of rotation may be reversed by interchanging any two, of the three power phases to the motor leads. Be sure that the power is off and steps are taken to prevent accidental starting of the motor before attempting to change any electrical connections.

CAUTION

Some motors have unidirectional ventilating fans. Running such a unit in reverse for any extended length of time will result in motor damage. On motors that are unidirectional, the direction of rotation is noted by an arrow mounted above the take-off-shaft and by a warning plate mounted near the main nameplate. To determine direction of rotation for which leads are connected, apply power momentarily and observe rotation. Motor should be uncoupled from driven equipment to insure driven equipment is not damaged by reverse rotation. Motor coupling may require removal or suppport if motor is

operated uncoupled from driven equipment.

6.Initial Start

After installation is completed, but before motor is put in regular service, make an initial start as follows:

A.Insure that motor and control device connections agree with wiring diagrams.

B.Insure that voltage, phase and frequency of line circuit (power supply) agree with motor nameplate.

C.Check insulation resistance according to Section Ill “Storage”, Part 3.

D.Check all foundation and base bolts to insure that they are tight.

E.If motor has been in storage, either before or after installation, refer to Section Ill “Storage”, Part 4 for preparations.

F.Check for proper or desired rotation. See Part 5 of this section.

G.Insure that all protective devices are connected and are operating properly.

H.Run motor at minimum possible load long enough to be certain that no unusual condition develops. Listen and feel for excessive noise, vibration, clicking or pounding. If any are present, stop motor immediately. Investigate the cause and correct before putting motor into service. In the case of vibration, see Part 7 of this section.

CAUTION

Repeated trial starts can overheat the motor (particularly for across-the-line starting) or the external starting equipment. If repeated trial starts are made, allow sufficient time between starts to permit heat to be dissipated from windings and controls to prevent overheating. Refer to Starting Duty Nameplate (if supplied) and NEMA MG1- 12.54, MG1-20.42 and MG1-20.43 for allowable starting frequency and load inertia (WR2).

986269, LARGE AC ELECTRIC MOTORS specifications

Emerson Large AC Electric Motors, specifically model 986269, exemplify cutting-edge technology and exceptional design, catering to the diverse needs of industrial applications. These motors are engineered for reliability, efficiency, and performance, making them suitable for various sectors, including manufacturing, mining, and oil and gas.

One of the standout features of the Emerson 986269 motor is its robust construction. Built to withstand harsh operational environments, this motor has a durable housing that protects it from external contaminants such as dust, moisture, and chemicals, thereby prolonging its lifespan. The design promotes efficient heat dissipation, which minimizes overheating risks and enhances both performance and reliability.

Energy efficiency is a critical aspect of the Emerson 986269 AC electric motor. Utilizing advanced design methodologies, the motor offers high efficiency ratings, which translates into lower operational costs and reduced carbon footprints. It meets or exceeds the latest efficiency standards, making it an eco-friendly choice while ensuring optimal performance in various applications.

Another significant feature is its versatility. The Emerson 986269 motor is available in various sizes and configurations, making it suitable for different tasks and load requirements. Its adaptability allows seamless integration into existing systems, making it a valuable asset for businesses looking to upgrade their machinery without extensive modifications.

The motor employs state-of-the-art technologies such as premium-quality bearings and insulation systems, contributing to its quiet operation and minimal maintenance requirements. This means reduced downtime and increased productivity, both vital for maintaining competitive advantages in today's fast-paced industrial landscape.

Moreover, Emerson's commitment to safety is reflected in the design of the 986269 motor. It is equipped with advanced thermal protection features and complies with international safety standards, ensuring secure operation even in challenging conditions.

In conclusion, the Emerson Large AC Electric Motor 986269 sets the benchmark for performance, reliability, and efficiency in industrial applications. With its robust construction, energy-efficient design, and advanced technologies, it is an investment that promises long-term operational benefits and peace of mind for users. Whether for heavy-duty tasks or general industrial use, this motor remains a top choice for companies aiming to enhance their operational efficiency and productivity.