Connection
7.1 Connecting the cooling
SIMOTICS M-1FE2 built-in motors
136 Hardware Installation Manual, 04/2020, A5E50074509B AA
7.1.2 Safety instructions
Danger to life caused by short-circuit to a frame in a fault situation
The spindle housing must be electrically connected to the cooling jacket.
In a fault situation, lethal voltage can be present at the spin
dle housing that causes death or
severe injuries because of an electric shock.
• Ground the complete motor spindle in accordance with the regulations.
Danger to life caused by rotation of the assembled spindle shaft on synchronous motors
The rotating of an assembled built-in motor produces induction that causes lethal voltages
at the cable ends of the motor.
The voltages can cause death or severe injuries because of an electric shock.
• Do not touch any bare cable ends.
• Prevent assembled built-in motors from turning.
• Insulate the terminals and cores of bare cable ends.
Danger to life caused by high leakage currents
High leakage currents can cause death or injuries as result of an electric shock.
• Satisfy the requirements placed on protective conductors in accordance with EN 61800-
5-1.
Danger to life caused by high residual voltages
When the power supply voltage is switched-off, active components of the motor can have
an electrical charge of more than 60 μC.
The residual voltages that occur at the connections of the built-in motor several seconds
after power-down can cause death or severe injuries as result of an electric shock.
• Do not touch any bare connections.
• Protect bare connections and active components against inadvertent contact.
• Ground the motor properly.
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