Iacdrive|Automation Solution

Is it possible to use the same soft starter to start two MV induction motors?

Yes, it is possible to start multiple motors from a single soft-start. Typically, the motors are started sequentially and are identically rated. In a typical MV application, additional contactor cabinets are connected and control-tied to the soft-start. Once the first motor comes up to speed, the soft-start “Switches” to control the next motor in the sequence.
In the case of only two motors, some soft-starts are manufactured with dual settings to permit starting of motors that have different starting characteristics, but actual motor output during ramp-up may not differ much, being limited by the inherent performance characteristics of the soft-start.
Multiple simultaneous starting of motors requires that the motors be identical and that the soft-start be sized for the total load and supplied with supplemental cooling.

What are the maintenance requirements of a VFD?

Under normal operating conditions, VFD’s generally require little maintenance once properly set up. Spare parts can be obtained readily, and some are replaceable by maintenance personnel. In other cases, qualified service technicians are required.
Also see How To Maintain a VFD?

What is the best drive manufacturer for my application?

This is a difficult question to answer. Our sales engineers are knowledgeable of what products are available from well-known manufacturers. They will recommend the best drive for you based on your application and specifications. There maybe several products that will meet your specifications, we will recommend the one that is best based on price and performance. Simply e-mail us (info@iacdrive.com) with your application and specifications and we will recommend the drive that’s right for you.

What filters are used for the VFD?

Line-side filters are sometimes installed to reduce EMI, although modern PWM drives are much less likely to generate significant noise.
On the load side, output chokes can be installed to reduce drive generated harmonics in the motor leads. Many drives have some output filtration already installed and harmonics are generally not a problem as long as wiring is correctly segregated, properly grounded, and the motor leads are not excessively long (typically less than 100 meters).

What is a line reactor and what will it do for my application?

A line reactor is an impedance device. Its benefits are reduction of drive cross talk, and interference.
Input reactors will limit the waveform distortion and harmonic voltages. This will help to improve the power factor due to a reduction of the RMS currents in the system.
Output reactors are generally good up to 100 feet is distance (drive to motor). The benefits are the damping of peak voltage overshoots, which will reduce internal motor heating and lessen the “noise” that a motor can produce when it is run by a drive. On installations where the distance is greater than 100 feet, filters are recommended for motor protection.

Will Iacdrive train our staff to operate and maintain our equipment?

We can develop a training program that is tailored to your companies’ needs and location. So, when it makes sense, we can train your personnel in our facility, or bring the classroom to your factory, for hands on training.

Should I replace my old analog equipment with new digital equipment?

DEFINITELY!!! For so many reasons. . . difficult and costly to get spare parts, Hard to find Tech. Support / serviceability, no communications, little flexibility, etc.

What is the cost of a VFD?

Cost varies widely based on manufacturer, voltage, ampacity, enclosure type, torque requirements, quantity of analog and digital inputs/outputs, and communications options. One example: a standard wall-mountable, NEMA 1 , 3-50/60-380/480 volt, 30Hp, variable torque/normal duty, general purpose drive, with 2AI/2AO, 6DI/3DO, and Modbus RTU protocol.

Will a variable frequency drive or variable speed drive save me money?

Yes, the AC drive can save you money on operating cost, when the load and motor speed can be varied. By reducing the speed of the motor, you will consume less energy, which will reduce your electric bill.

Can I convert my DC Drive application to an AC Drive?

Yes, You can convert your DC drive system; to an AC drive system by replacing both the motor and the drive. Consideration must be given for the torque and speed range of the DC motor, when converting to AC. You will need to consider using a “Vector” AC drive for this conversion.