nord 6051302, Operating And Assembly Instruction Manual

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Table of Contents
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3.7.5 Further operating conditions
The motors are designed for continuous operation and normal one-time starting in which no significant
starting heat is generated.
Voltage supply deviations are only permitted to a limited extent: Voltage ± 5%, frequency ± 2%. Mains
symmetry must be maintained to keep heat generation within permissible limits. Significant deviations
from the nominal values can lead to an impermissible increase in heat generation in the motor.
Each machine must be protected against impermissible heating by a current-dependent and delayed
circuit breaker that has been tested for operation by an approved facility. If such a configuration is not
possible, additional protection measures are required (e.g. thermal protection of the machine).
Repairs must be carried out by Getriebebau NORD or by an officially recognised expert. The work must
be indicated with an additional repair plate. With the exception of standard, commercially available and
equivalent components, only original spare parts (see spare parts list) may be used. This particularly
applies for seals and connection parts.
Check that the connection terminals, protective conductor terminal and the equipotential bonding
terminal are firmly fastened. Check that the cable glands and the terminal box seals are in good
condition.
All work on electrical machinery must be performed when the machine is at a standstill and with all poles
disconnected from the mains.
The motor must be removed for measurement of the insulation resistance. The measurement must not
be performed in the explosion hazard area. As soon as measurement has been completed, discharge
the connection terminals again immediately by short-circuiting in order to prevent any spark discharges
occurring in the explosion hazard area.