SIMOVERT P 6SE21 Series Inverters
English
Operating Instructions
Siemens plc 1995
G85139–A1615–U156–A
02.95
14
4. ELECTRICAL INSTALLATION
Hazardous voltages of over 750 V are used in the operation of this equipment and can cause severe
personal injury or loss of life. The following precautions must be observed to reduce risk of injury or
death:
•
Only qualified service technicians should be allowed to test and repair the equipment or parts
thereof.
•
Keep all covers in place during normal operation.
•
Defective discharge resistors of the dc–link circuit capacitors cause hazardous voltages to
remain in the unit for some time. Make sure that the voltage has dropped below 50 V before
touching any electrical contacts. Non–observance can lead to severe or fatal injury.
•
During commissioning, should it be necessary to make measurements with the power turned on,
do not touch any electrical contacts during such work and keep one hand completely free and
outside the electrical circuitry.
•
Ensure that test equipment is in good and safe operating condition.
•
Stand on an ESD–approved insulated surface while performing commissioning work with the
power on, being sure not to be grounded.
•
When working on the connected motor or motor supply cable, ensure that the input power switch
of the equipment for the external feed breaker is padlocked in the OFF position.
•
All work on the equipment and its installation must be carried out in accordance with the locally
applicable electrical wiring regulations. This includes proper grounding to ensure that no
accessible part of the equipment is at line or any other hazardous potential.
•
The User is responsible for installation of the motor, drive controller, transformer and other
devices in accordance with regulations and local safety codes which may apply. Pay special
attention to proper conductor sizing, fusing, grounding, isolating and disconnecting means and
to overcurrent protection.
•
Failure to ground the inverter properly can result in the surface of the equipment carrying
hazardous voltages which may cause severe injury, loss of life or considerable damage to
property.
WARNING
4.1 Mains Input / Motor Connections
Only qualified personnel who are familiar with the equipment, its operating instructions and
requirements should be allowed to install and operate this equipment.
Incorrect connection of the mains and motor leads (such as connecting the input to the output or
connecting excessive supply voltages to the input) will result in damage to the inverter.
WARNING
First, ensure that an input power supply of the correct voltage and current rating is available – see section 2. Next,
ensure that the specified current rating fuse/overload circuit–breaker is connected between the input power source
and the inverter.
The power inputs should be connected to X1 on the lower printed circuit board using a three or four–core cable and the
motor should be connected using a four–core cable, both suitable for the currents specified in section 2.1. To connect
the cable, first remove the plastic cover of the drive by undoing the retaining screws or by levering the retaining clips
inwards with a screwdriver. Next, connect the cable to the terminal block X1 as shown in Figure 3.
