Modernization Continued

3.Apply power to the existing elevator control wiring and the Vector Control.

4.Refer to Table 5-2 ªPre-Installation Testsº. Perform all tests with the elevator connected in this temporary configuration. It is important to record all information for future use. These tests are performed with the existing elevator control.

5.Balanced Car Test

a.A balanced elevator car is required for this test.

b.Apply power to the Vector control and press the DISPLAY button until the motor speed RPM is displayed.

c.Operate the elevator at contract speed in both the up and down directions. Recording the AC line voltage, motor current and motor speed in both directions of travel.

Note: If the RPM display is erratic or varies more than 10 RPM at contract speed, there may be a problem involving the encoder mounting, wiring or shielding. Eliminate the problem and rerun the test.

6.Full Load Test

a.Load the elevator car to its rated capacity. (Use a distributed load, not a point load).

b.Operate the elevator at contract speed in both the up and down directions. Recording the AC line voltage, motor current and motor speed in both directions of travel.

c.Verify the motor current under full load at contract speed does not exceed the rating of the Vector Control. If the measured current exceeds the motor's nameplate rating, then the motor and Vector control may be undersized for the application. This must be evaluated and corrected before continuing with the Vector control installation.

d.AC line voltages recorded during the tests should be within the operating range for the Vector control as specified in the Installation and Operating Manual that is supplied with the control.

Caution: If the full load measurements exceed the ratings stated on the motor or control nameplates, do not proceed. A correctly sized Vector Control and Motor must be installed. Otherwise, equipment damage may result.

MN770

Set-Up Information 5-9

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Baldor MN770 manual Balanced Car Test, Full Load Test
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MN770 specifications

The Baldor MN770 is an impressive industrial motor designed for a variety of applications, showcasing robust construction and advanced technology. Known for its reliability and efficiency, the MN770 is manufactured by Baldor Electric Company, a prominent name in the electric motor industry.

One of the main features of the MN770 is its high-efficiency design. This motor adheres to stringent efficiency standards, helping to reduce energy consumption and lower operational costs. It typically meets or exceeds NEMA Premium Efficiency ratings, making it an excellent choice for businesses looking to optimize their energy use.

The MN770 motor is built with a durable cast iron frame, ensuring longevity and resistance to harsh operating conditions. Its weatherproof design is ideal for both indoor and outdoor applications, making it suitable for various environments, including manufacturing plants, water treatment facilities, and agricultural operations.

Another significant characteristic of the MN770 is its versatility. The motor is available in a range of horsepower ratings, allowing users to select the model that best fits their specific needs. Additionally, it offers various mounting configurations and voltage options, further enhancing its adaptability for diverse applications.

The motor utilizes advanced insulation systems and cooling technologies to ensure optimal performance and a longer lifespan. The robust design helps to dissipate heat effectively, enabling the motor to operate efficiently even under heavy loads. This characteristic is essential for applications requiring continuous operation without compromising reliability.

Moreover, the Baldor MN770 incorporates advanced design features such as precision-balanced rotors and high-performance bearings. These characteristics contribute to reduced vibration and noise levels, promoting a quieter working environment and improving overall operation efficiency.

In summary, the Baldor MN770 motor stands out due to its high efficiency, robust construction, versatility, and advanced technologies. Its ability to perform reliably in various industrial applications makes it a popular choice among engineers and facility managers. Investing in the MN770 not only enhances operational efficiency but also supports sustainability efforts by reducing energy consumption in industrial environments.
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