Nord Drivesystems SK 510P, Руководство с инструкциями по установке

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2 Assembly and installation
BU 0600 en-3221 45
2.5.3.4 Braking resistor (B+, B-)
TerB/ B- are intended for the connection of a suitable braking resistor. A short screened
connection should be selected.
CAUTION
Hot surfaces
The braking resistor and all other metal components can heat up to temperatures above 70 °C.
• Danger of injury due to local burns on contact.
• Heat damage to adjacent objects
Allow sufficient cooling time before starting work on the product. Check the surface temperatures with
suitable measuring equipment. Maintain an adequate distance to adjacent components or provide
protection against contact.
2.5.3.5 DC coupling (B+, DC-)
NOTICE
Link circuit overload
Link circuit coupling faults can have negative effects on the charging circuits in the inverters or the life
of the link circuits, up to their complete destruction.
• It is essential to observe the criteria summarised below for establishing the frequency inverter DC
supply / link circuit coupling.
• For direct current coupling of single-phase devices, it is essential to ensure that coupling to the
same external conductor is used.
In drive technology, DC-coupling is advisable if motors simultaneously act as drivers and generators in
the system. In this case, the energy from the drive which is acting as a generator can be fed back to
the drive which is acting as a motor. The advantages are lower energy consumption and the sparing
use of braking resistors. In addition, the energy balance can be made even more efficient with the use
of a regenerative feedback unit or an input/feedback unit.
In principle, devices with the same power
should be connected together for DC coupling wherever possible. Furthermore, only devices which
are ready for operation (whose link circuits are charged) may be coupled.