Start-Up; Safety Instructions For Commissioning - Siemens SIMOTICS HT Series Operating Instructions & Installation Instructions

Start-up

7.1

Safety instructions for commissioning

Observe the following when carrying out any work on the machine:
● Comply with the general safety instructions (Page 13)
● Comply with the applicable national and sector-specific regulations.
● When using the machine within the European Union, comply with the specifications laid
Note
Service Center
Please contact the Service Center (Page 117) if you require commissioning support.
Danger to life as a result of the converter voltage
As long as the feeding converter is switched on, or the DC link of the converter is not
discharged, there can be a voltage at the motor terminals even when the rotor is not moving.
Depending on the converter type, the voltage is up to 1000 V. When coming into contact, this
can result in death, serious injury, and material damage.
● Maintain the five safety rules (Page 13)at all times when operating the machine.
Danger to life as a result of voltage at the motor terminals when the rotor is rotating
There is always a magnetic flux in the motor due to the permanent magnets in the rotor. With
each rotation of the rotor, a voltage occurs at the motor terminals. As a result of this, there is
also a voltage at the converter output terminals via the connecting cable. Contact with them
can cause death, serious injury or material damage.
● When working on the drive system, you must prevent any rotational movement of the motor
Damage caused by the short-circuit current
When the permanent magnet rotor is a driven, a voltage ("rotor voltage") is induced in the
stator winding, that can be measured at the motor terminals. If a cable or converter short-circuit
simultaneously occurs, then a short-circuit current is driven by the induced rotor voltage. This
can result in material damage.
● Use cables that are short-circuit proof.
● Alternatively, use a circuit breaker close to the motor to protect the cable against a short
SIMOTICS HT Series HT-direct 1FW4...1......A
Operating Instructions 11/2018
down in EN 50110‑1 regarding safe operation of electrical equipment.
shaft.
circuit.
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