NORD Drivesystems BU0750 - Manual (Page 9)

1. General information
BU 0750 GB-3311 Subject to technical amendments 9
CAUTION

Children and the general public must be kept away from the equipment!

The equipment may only be used for the purpose intended by the manufacturer. Unauthorised
modifications and the use of spare parts and additional equipment which has not been
purchased from or recommended by the manufacturer of the device may cause fire, electric
shock and injury.

Keep these operating instructions in an accessible location and give them to all operators!
WARNING
This is a product with a restricted sale class as per IEC 61800-3. In a domestic environment this
product may cause high frequency interference, in which case the operator may be required to take
suitable measures.
An appropriate measure would be the inclusion of a recommended line filter.
1.5 Certifications
1.5.1 UL and cUL certification
(Use in North America)
“Suitable for use on a circuit capable of delivering not more than
5000 rms symmetrical amperes, 200…240 Volts or
380…480 Volts (three phase)” and “when protected by J class
fuses.” as indicated."
Suitable for use on a circuit capable of delivering not more than
5000A (symmetrical), 200...240V or 380...460 Volts (three
phase) and when protected by "J class fuses" as described in
Section 9.4.
NORDAC SK 750E frequency inverters have a motor overload
protection. Further technical details can be found in Section 9,
"Technical Data".
“Relays on extension units and customer interface units may
only be used at 230V ac maximum, same phase only.”
The relays of the extension units and customer interface units may only be used at max. 230V ac. The same
polarity must be used for all relays.
„Use 75°C Copper Conductor Only, Maximum Surrounding Air Temperature 50°C.”
"Copper cable with an insulation rating of at least 75°C must be used for connection. A maximum ambient
temperature of 50°C must be maintained.
Frequency inverter size1:
„The torque value for the field wiring terminals for mains circuit terminals and motor terminals must be 10.62 … 13.27 lb-in
(1.2 … 1.5Nm). The torque value for the supplemental terminal blocks, external brake resistor and thermal sensor must be
4.42 … 5.31 lb-in (0.5 … 0.6Nm).”
Frequency inverter size 1:
The tightening torque value for the terminals the mains and motor cables, must be between 10.62 … 13.27 lb-in
(1.2
… 1.5Nm). Control cable terminals, thermistor and PTC connections and connections to the brake resistor
must be tightened with 4.42 … 5.31 lb-in (0.5 … 0.6Nm).
Frequency inverter size2:
„The torque value for the field wiring terminals for mains circuit terminals and motor terminals must be 22.12 … 39.82 lb-in
(2.5 … 4.5Nm). The torque value for the supplemental terminal blocks and thermal sensor must be 4.42 … 5.31 lb-in
(0.5 … 0.6Nm). The torque value for the external brake resistor must be 10.62 … 13.27 lb-in (1.2 … 1.5Nm).”
Frequency inverter size 2:
The tightening torque value for the terminals the mains and motor cables, must be between 22.12 … 18.06 lb-in
(2.5 … 4.5Nm). Control terminal connections and thermistor/PTC connection must be tightened with
4.42 … 5.31 lb-in (0.5 … 0.6Nm).
UL File: E171342