Servomotor series JHN, JHQ, and JL – User Manual
Installation and commissioning
Jetter AG
208
Heat build-up of the motor during operation - Heat dissipation
8.3.2
WARNING
Warning of hot surfaces!
The motor heats up during operation.
The surface temperature can exceed 130 °C.
•
Take protective measures to prevent inadvertent contact with the motor,
e.g. install guards.
•
Make sure that no temperature-sensitive parts, e.g. connection cables,
are attached or fastened to the motor.
•
Provide sufficient heat dissipation. For the following locations of the
motor, the respective maximum temperatures apply:
Connector: ≤ 130 °C
Cable: ≤ 90 °C
Flange: ≤ 65 °C
Higher temperatures require a derating. Derating tables for operating
the motors at higher temperatures can be found in chapter 4.5 Derating
at ambient temperatures higher than 40 °C.
•
Allow the motor to cool down for some time before you start working on
it, e.g. to carry out maintenance jobs.
•
If necessary, take additional measures for specific applications and
operating conditions.
Danger due to high operating voltage
8.3.3
DANGER
Hazard caused by high operating voltage!
Risk of electric shock due to wrong grounding of the frame
Wrong grounding can cause a high voltage to be present on the frame.
This may lead to muscle cramps, burns, unconsciousness, respiratory
standstill, or death.
•
Please mind proper grounding of servo amplifier and servo motor.
•
Please ensure correct, low-resistance grounding of the frame via PE
reference potential in the control cabinet.
•
The frame must have a conductive, low-resistance connection with the
machine into which the motor has been integrated.
Danger from electrical leakage and stray currents
8.3.4
DANGER
Danger in potentially explosive atmospheres!
Sparking caused by electrical leakage currents in conductive parts of
the motor!
The motor can become an ignition source in potentially explosive
atmospheres if leakage currents flow in conductive parts of the motor.
This can lead to overheating of surfaces or dangerous corrosion.
•
Ensure balanced voltage potentials so that no stray or leakage currents
can occur.
•
According to DIN EN 60079-14 and DIN EN 61241-0, there must be a
connection to an equipotential bonding system. The grounding
conductor must be fixed with a suitable PE bolt of size 4 mm
2
or more or
equal to the supply line.
