NORD Drivesystems BU0750 - Manual (Page 6)

NORDAC SK 750E Manual
6 Subject to technical amendments BU 0750 GB-3311
1 General information
The NORDAC SK 750E series is based on the proven SK 700E series. However, it is designed for use in
harsher ambient conditions (up to 60°C, at least IP54). These devices are characterised by the high modularity
and excellent control characteristics.
These devices are provided with sensorless vector current control system which in combination with
asynchronous three-phase motor types constantly ensures an optimised voltage-to-frequency ratio. This has
the following significance for the drive: Peak start-up and overload torques at constant speed.
Due to its modular construction, the variously combinable technology units, customer units and special
extension units, this device series is suitable for all possible applications.
Due to the wide range of setting options, these inverters are capable of controlling all three-phase motors. The
power range is from 5.5kW to 22kW (3~ 400V...480V) and 5.5 to 11kW
(3~ 200…240V) with integrated line
filter. The overload capacity of these devices is 150% for 60 seconds and 200% for 3.5 seconds.
This manual is based on the device software V3.5R1 (P707) for the SK 750E. If the frequency inverter used
has a different version, this may lead to some differences. If necessary, you can download the current manual
from the Internet (
http://www.nord.com/ ).
1.1 Overview
Properties of the basic device:

High starting torque and precise motor speed control setting with sensorless current vector control

Can be mounted next to each other without additional spacing

Permissible environmental temperature range: 0 to 50°C (or up to 60°C please refer to the technical
data)

Integrated EMC line filter for limit curve A as per EN55011

Automatic measurement of the stator resistance

Programmable direct current braking

Integrated brake chopper for 4 quadrant drive

Integrated RS485 interface on M12 socket

Four separate online switchable parameter sets

High protection class IP54 (air cooling), IP65 with water cooled version (special version)
NOTE:
The characteristics of the basic device with an additional technology unit, customer unit or special
extension are described in
Section 3 „Options„.
1.2 Delivery
Check the equipment immediately after delivery/unpacking for transport damage such as deformation or loose
parts.
If there is any damage, contact the carrier immediately and carry out a thorough assessment.
Important! This also applies even if the packaging is undamaged.