WARNING
Risk of electric shock
The insulation of the temperature sensors for the winding monitoring with respect to the
winding is implemented according to the requirements for basic insulation. The temperature
sensor connections are located in terminal boxes, safe to touch - and have no protective
separation. This is the reason that in the case of a fault, a hazardous voltage can be present
at the measuring sensor cable. When touched, this can result in death, severe bodily injury
and material damage.
● When connecting the temperature sensor to external temperature monitoring devices,
when required, apply additional measures to fully comply with the requirements set out in
IEC 60664-1 or IEC 61800-5-1 "Hazard due to electric shock".
6.3.6
Connecting to a converter
Selecting and connecting the cable
● Use Motion Connect cables or symmetrically constructed, shielded cables to connect the
motor to a converter. The cable shielding, made up of as many strands as possible, must
have good electrical conductivity. Braided shields made of copper or aluminum are well
suited.
● The shield is connected at both ends, at the motor and converter. Keep unshielded cable
ends as short as possible.
● In order to ensure that high-frequency currents are efficiently discharged, provide a 360°
contact through a large surface area at the converter and at the motor. Use for instance,
EMC glands at the cable entries.
Measures to reduce bearing currents
To specifically reduce and prevent damage caused by bearing currents, consider the system
as a whole, which comprises the motor, converter, and driven machine. The following
precautions help to prevent bearing currents:
● Setting up a properly meshed grounding system in the system as a whole, with low
impedance for high-frequency currents
● No potential difference between the motor, converter, and working machine.
– Use symmetrical, shielded connecting cables.
– Connect the cable shield at both ends over the greatest possible surface area (360°
contact).
– Use equipotential bonding conductors between the motor and the driven machine as
well as between the motor and the converter
● Limit the voltage rate of rise by using an output filter to dampen harmonic components in
the output voltage
Electrical connection
6.3 Auxiliary circuits
SIMOTICS M-1PH8 1PH818., 1PH822., 1PH828.
84
Operating Instructions 10/2017
Содержание SIMOTICS M-1PH818
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Страница 14: ...Introduction SIMOTICS M 1PH8 1PH818 1PH822 1PH828 14 Operating Instructions 10 2017 ...
Страница 28: ...Description SIMOTICS M 1PH8 1PH818 1PH822 1PH828 28 Operating Instructions 10 2017 ...
Страница 66: ...Mounting 5 5 Refitting the external fan SIMOTICS M 1PH8 1PH818 1PH822 1PH828 66 Operating Instructions 10 2017 ...
Страница 104: ...Operation 8 10 Faults SIMOTICS M 1PH8 1PH818 1PH822 1PH828 104 Operating Instructions 10 2017 ...
Страница 132: ...Maintenance 9 3 Repair SIMOTICS M 1PH8 1PH818 1PH822 1PH828 132 Operating Instructions 10 2017 ...
Страница 160: ...Disposal 11 4 Disposal of components SIMOTICS M 1PH8 1PH818 1PH822 1PH828 160 Operating Instructions 10 2017 ...
Страница 166: ...Quality documents SIMOTICS M 1PH8 1PH818 1PH822 1PH828 166 Operating Instructions 10 2017 ...
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