TABLE 1 – ELECTRICAL RATINGS

AC Line Input Voltage

Maximum

Nominal

Maximum Continuous

Maximum

±10%, 50/60 Hz

AC Line Input Current

Output Voltage

Output Load Current

Horsepower Rating

(Single Phase Volts AC)

(Amps AC)

(Volts AC)

(RMS Amps/Phase)

HP, (kW)

115

16

0 – 230

3.6

1, (0.75)

 

 

 

 

 

208/230

10

0 – 230

3.6

1, (0.75)

 

 

 

 

 

TABLE 2 – GENERAL PERFORMANCE SPECIFICATIONS

Parameter

Specification

Factory Setting

AC Line Input Voltage (Volts AC, ±10%, 50/60 Hz)

115 or 208/230

208/230

 

 

 

Maximum Load Capacity (% for 2 Minutes)

150

—

 

 

 

Switching Frequency (kHz)

8

—

 

 

 

Signal Following (Non-Isolated Input1) Input Voltage (Volts DC)

0 – 5

—

Signal Following Input Resolution (Bits)

8

—

 

 

 

Maximum Speed Trimpot (MAX) Range (% of Frequency Setting)

70 – 110

100

 

 

 

Minimum Speed Trimpot (MIN) Range (% of Frequency Setting)

0 – 40

0

 

 

 

Acceleration Trimpot (ACCEL) Range (Seconds)

0.3 – 20

1.5

 

 

 

Deceleration Trimpot (DECEL) Range (Seconds)

0.3 – 20

1.5

 

 

 

Slip Compensation Trimpot (COMP) Range (Volts/Hz/Amp)

0 – 3

1.5

 

 

 

Current Limit Trimpot (CL) Range (% Range Setting)

0 – 200

160

 

 

 

Boost Trimpot (BOOST) Range for 50 Hz Output Frequency (Volts AC)

0 – 70

—

 

 

 

Boost Trimpot (BOOST) Range for 60 Hz Output Frequency (Volts AC)

0 – 35

5

 

 

 

Motor Horsepower Selection (HP)

1/4, 1/2, 3/4, 1

1

 

 

 

Output Frequency (Hz)

0 – 50, 0 – 60

0 – 60

 

 

 

Frequency Multiplier (1X, 2X)

1, 2

1

 

 

 

Minimum Operating Frequency at Motor (Hz)

1

—

 

 

 

Speed Regulation (30:1 Speed Range) (% Base Speed)2

2.5

—

 

 

 

Speed Range (Ratio)

60:1

—

 

 

 

Operating Temperature Range (°C)

0 – 45

—

 

 

 

Notes: 1. Requires an isolated signal. If a non-isolated signal voltage is used, install the ID5SI-2 Signal Isolator.

2.Dependent on motor performance.

II.WIRING INSTRUCTIONS

 

 

 

 

!

WARNING! Read Safety Warning, on page 1, before using this control.

 

 

 

 

Disconnect the AC line before wiring.

 

 

 

 

 

 

 

 

 

 

Note: To avoid erratic operation, do not bundle AC line and motor wires with wires from sig- nal following, Start/Stop Switch or any other signal wires. Use shielded cables on all signal wiring over 12” (30cm). Shield should be Earth grounded on the control side only. Wire the control in accordance with the National Electrical Code requirements and other codes that may apply to your area. See Table 3 and Figure 4, on page 6.

Be sure to properly fuse each AC line conductor that is not at ground potential. Do not fuse neu- tral or grounded conductors. See Section VII, on page 10. A separate AC line switch or con- tactor must be wired as a disconnect so that each ungrounded conductor is opened. A Power On/Off Switch may be used in lieu of, or in addition to, the Start/Stop Switch. The switch can be wired for single pole or double pole operation, as required.

To maintain the watertight integrity of the control, be sure to use suitable watertight connec- tors and wiring which are appropriate for the application. Two 7/8” (22.2mm) knockout holes are provided for standard 1/2” knockout connectors (not supplied) for wiring. A watertight plug is provided if only one knockout is required.

The enclosure is designed with a hinged case so that when the front cover is open, all wiring stays intact. To open the cover, the four screws must be loosened so they are no longer engaged in the case bottom. After mounting and wiring, close the cover making sure that the wires do not get caught or crimped as the cover is closed. Tighten all four cover screws so that the gasket is slightly compressed. Do not over tighten.

5

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Baldor MN781W manual Electrical Ratings, General Performance Specifications, II. Wiring Instructions
Page 6 Page 8

MN781W specifications

The Baldor MN781W is a versatile and robust motor designed for various industrial applications. Known for its high performance and efficiency, this motor is an integral component in diverse sectors, including manufacturing, agriculture, and energy production. Its design emphasizes durability, reliability, and energy efficiency, making it a preferred choice for many professionals.

One of the main features of the Baldor MN781W is its premium efficiency rating, which ensures reduced energy consumption and lower operational costs. This motor meets or exceeds the efficiency standards set by the National Electrical Manufacturers Association (NEMA), contributing to substantial energy savings over its lifespan. When compared to traditional motors, the MN781W not only helps in cutting energy expenses but also supports environmentally friendly initiatives by minimizing carbon footprints.

The MN781W motor utilizes advanced insulation materials and coating technologies, providing enhanced protection against moisture, dust, and other environmental factors. This ensures optimal performance in challenging conditions while prolonging the motor’s life. The unique design of the motor housing and internal components minimizes heat generation, which is essential for extending operational longevity and preventing breakdowns.

In terms of technological features, the MN781W incorporates state-of-the-art bearing designs that reduce friction and enhance overall efficiency. This enables the motor to operate smoothly under heavy loads, which is particularly beneficial in industrial applications requiring consistent performance. Additionally, the motor is equipped with built-in thermal protection, which automatically shuts down the motor in case of overheating, thereby preventing damage and ensuring safety.

Another significant characteristic of the Baldor MN781W is its ease of installation and maintenance. The motor is designed with user-friendly access points for wiring and inspection, allowing technicians to conduct routine checks and repairs with minimal downtime. Furthermore, its modular design supports a range of mounting options, enabling seamless integration into existing systems.

In conclusion, the Baldor MN781W stands out as a reliable, energy-efficient motor that meets the demands of modern industries. With its premium efficiency rating, advanced protection features, and easy maintenance, it is an excellent choice for any business looking to enhance operational efficiency and reduce costs. Whether used in heavy machinery or process equipment, the MN781W ensures optimal performance and reliability, making it a valuable investment in industrial applications.
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