nord B 1050, Operating And Assembly Instructions Manual

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3 Assembly instructions, storage, preparation, installation
B 1050 en-4419 45
3.15 Drive coupling
NOTICE!
Risk of damage to gear unit and motor from poor coupling alignment
• Check the alignment of the coupling prior to commissioning. The coupling must be positioned
according to the installation instructions (specific drawing for the order). If no details are stated, the
coupling must be aligned flush with the end of the motor shaft.
The coupling specifications must always be verified if the operating conditions (power, speed, changes
to the drive or the driven machine) change.
3.15.1 Dog coupling
Normally, the gear unit is connected to the motor with a dog coupling. For gear units without an
IEC/NEMA adapter, the alignment between the gear unit and the motor must be ensured by the
operator and the coupling installed according to the manufacturer's instructions.
For gear units with IEC/NEMA adapters, see section 3.14 "Motor (Option: IEC, NEMA)".
3.15.2 Turbo coupling
WARNING
Risk of oil being expelled in case of an overload
The oil being expelled from the coupling is hot. Danger of burns.
• The coupling must be encased as a protection against oil being expelled.
The coupling must be positioned according to the installation instructions (specific drawing for the
order). If no details are stated, the coupling must be aligned flush with the end of the motor shaft.
Turbo couplings are usually supplied with a fusible plug. In case of overload the oil temperature in the
coupling increases. As soon as the temperature limit (usually 140°C) is reached, the fusible plug melts
and the oil flows out of the coupling in order to separate the motor and the gear unit before both
components are damaged.
It is recommended that an oil tray is provided for the turbo coupling in order to catch escaping oil. The
quantity of oil in the coupling can be obtained from the manufacturer's documentation.
Such an oil tray is installed as standard for gear units on a motor swing base or base frame which are
combined with a turbo coupling.
Optionally, turbo couplings can be equipped with a fusible plug and a separate mechanical switch.