MTL 8937-HN Extended Range Digital DC Drives

MTL 8937-HN  Extended Range Digital DC Drives

The MTL 8937-HN is obtainable in a range of 650 to 2250 amps (980 kW/1320 hp) and provides a choice of two AC bus positions; either through top or bottom entry. Both possibilities simplify the use of pre-existing wiring in retrofit installations or present wiring alternatives for new designs. This range can be attained through a high voltage (690V AC) or standard voltage (480V AC) model. A 690V AC power supply enables the usage of 750V DC thermal motors. This results in a significant power boost, increasing the shaft power up to 1500 kW/2000 hp for the 2250A model, which represents a 50% rise when compared to the standard voltage without requiring an increase in cable size.

The MTL 8937-HN model is available in two-quadrant or renewable four-quadrant versions of the DC drive using the PLX range. The four-quadrant iteration leverages two thyristor bridges to facilitate rotation and braking in both directions. This feature facilitates a gentle slowing of the load by reversing torque and regenerating energy. Unlike AC drives, it can produce complete torque at zero speed, safely holding the load steady without requiring mechanical brakes. This makes it particularly advantageous for winches and hoists. Direct current (DC) is ideal for a variety of applications, including mixers, extruders and rollers that require high starting torque and precise control at low or zero speed, as well as paper machines, wire drawing and converting.

MTL 8937-HN Extended Range Digital DC Drives can handle up to 2250 Amps and are ideal for controlling DC motors utilized in heavy-duty industrial applications like metal processing, steel mills, mining, or the cement, rubber, and plastics industries. PLX drives have the unique ability to feed energy back into the power supply during braking. With the capacity to provide up to 2250 amps at supply voltages of no more than 690 volts, these motor controllers are engineered to be compact, potent, versatile and user-friendly, thanks to the implementation of drive network control technology.