- Written by CP Staff
With models ranging from 3 to 4,500 hp, the product line begins with the compact SSW05, a fully digital soft starter with a state-of-the-art DSP (Digital Signal Processor) control. Simplicity
in set-up and operation is assured since all parameters and set-up selections are made using dip switches and potentiometers, product developers contend. The SSW05 comes standard with integral bypass contactor and is sized for light and medium duty applications. The SSW05 is available in the 3 to 75 hp motor range.
The SSW07, also with DSP control was designed to provide improved heavy duty performance on motor starts and stops with an excellent cost-benefit basis. Easy to set up, it simplifies start-up and daily operations. It is also compact and incorporates all electric motor protection and adapts to customer needs through its easy to install accessories. The SSW07 series of soft starters has built in bypass contactors and can be connected to “Fieldbus” communication networks such as Modbus RTU protocol. It is available from 5 to 400 hp.
The SSW06 is a third generation design and has the widest motor power range of 3 to 1,200 hp. The keypad with dual display has LED digits that provide improved visibility and make programming easier. Various field bus protocols are available along with numerous analog and digital I/O for maximum automation functions. Standard internal bypass contacts eliminate heat losses once the motor is at full operating voltage.
The GPH2 is a combination soft starter incorporating SSW07 soft starter, a circuit breaker with through the door handle and a NEMA 4/12 enclosure suitable for general purpose AC motor starter packages. It is available in the motor range of 5 to 350 hp. Another combination unit is the TPH2 Series Crusher Duty soft starter, which is designed for the most demanding AC motor starting applications requiring extreme torque. Housed in a NEMA 4 enclosure, the TPH2 is ideal for the harshest outdoor environments, even wash down locations. This series is available in the 100 to 500 hp motor range.
The largest unit in company’s line is the medium voltage soft starter, SSW7000. It features Flexible Torque Control (FTC), a unique WEG-developed technology using vector and direct torque control concepts based on VFD technologies. FTC is used to select the desired torque control according to the type of load applied to the motor providing a smooth start with a linear speed ramp during the entire starting process. All accessories can be quickly installed through “plug and play” concept. It also comes with a simple “cell phone like” keypad with the option of sequential or grouped access to control parameters by means of programmable keys on the display. This HMI keypad is removable and has upload and download capabilities. This series has a horsepower range of 750 to 4,500. — WEG Electric Corp., weg.net