Posted to News on 19th Feb 2011, 16:08
New size of SK 500E series cabinet-mounted frequency inverters
Nord Drivesystems is expanding its range of SK 500E series cabinet-mounted frequency inverters with a new size 7 covering rated motor outputs between 30 and 37kW. Models with even larger dimensions are already being planned.
As with all previous models, the new inverters are available with various feature kits, while retaining standardised sizes regardless of the functional range. Nord is also offering the inverter types SK 515E and SK 535E in the new size. The units enable out-of-the-box implementation for many standard industrial applications. Equipped with five parameter-capable control inputs, two analogue inputs, one analogue output and two relay outputs, the SK 515E provides many connection options for users. The SK 535E additionally features two analogue inputs and two output channels.
Standard features for all SK 500E inverters include sensorless current vector control, automatic parameter identification for connected motors, an integrated brake chopper for generative operation, PID process control and four parameter sets that can be switched online. Furthermore, the control card can be supplied from an external 24V source in the SK 515E and SK 535E inverters, which ensures access is maintained to parameters and the bus interface even when the power is switched off. This feature not only increases online availability, but also enables special applications such as emergency evacuation of elevators.
Both size 7 inverter types support the safety function 'Safe Stop' in compliance with EN 954-1 and EN ISO 13849-1 (up to the maximum safety category 4, stop category 0 and 1) and they feature an onboard CANopen interface. In addition to the extensive I/O equipment mentioned above, the SK 535E model also comes with a TTL input for speed and torque control, and provides powerful position control functions thanks to the Posicon module.
