Baldor MN770 manual Balanced Car Test, Full Load Test

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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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Contents Elevator Application Guide MN770Table of Contents Ii Table of Contents MN770 Drive Definition Section General InformationIntroduction ModernizationsLimited Warranty Safety Notice VAC or 460 VAC maximum per control rating Perform a ªMeggerº test. Failure to disconnect motor fromUnderwriter Laboratory requirements Overview FeatureSection Technologies Drive Performance ComparisonDC SCR Control 20H ControlInverter 15H Control21H Control Vector 17H & 18H Controls22H Control Section Application Considerations Electric Drives Common Control Features Operating ModeAvailable Operating Modes Elevator Motor Horsepower Selection US Measurement SystemMetric Measurement System Motor Sizing Dynamic Brake Hardware Selection OCW =Encoder Retrofit Section Hardware InformationGeneral Considerations Cable PreparationEncoder Cables Encoder End Control End Encoder Cable ConnectionDifferential Connections Single Ended ConnectionsBuffered Encoder Output Field Control Section Set-Up InformationDC SCR Controls FeedbackFinal Installation Overload = Fault Following Error = on Torque Proving = onFinal Adjustments Speed Command Armature EnableBrake Release Signal ContactorInitial Installation and Startup Inverter ControlsPage TURN-ON Vector Controls Balanced Car Test Full Load TestFinal Wiring Connections Series 18H Control ConsiderationsProcedure Initial Set-upSlip Adjustment Value Rated Motor Load Slip Adjustment ValueFinal Set-up Power Up/Down Sequence for Vector Controls Pre-Installation Tests DateVector Control Worksheet Set-Up Information MN770 Section Troubleshooting Electrical Noise Display R-C Snubber Circuit & twisted-pair Electrical Noise Considerations10HP, 460VAC Drive 30HP, 500VDC Drive, Shielded 10 Isolated Mounting Method Analog Signal Wires Wiring PracticesPower Wiring Encoder CircuitsOptical Couplers Optical IsolationPlant Ground Fiber OpticsAppendix a Load Weighing / Torque Feed ForwardTable A-1 Description of OperationAppendix B Serial CommunicationsAppendix B MN770 Appendix C Elevator Industry GlossaryPage Page Appendix C MN770 Box  Baldor Electric Company MN770 97 C&J300

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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