Setting Up, Commissioning And Maintenance; Lifting And Handling; Output Circuit And Motor Protection - Control Techniques Nidec SI-EtherCAT User Manual

WARNING - Fire Risk
Braking resistors operate at very high temperatures for short periods. The following
precautions are essential to avoid the risk of fire in the event of unexpectedly high braking
energy or loss of control of the braking circuit.
WARNING
• Locate the braking resistor so that inadvertent personal contact with hot surfaces is not
possible.
• Do not mount braking resistors on a combustible surface.
• Provide adequate ventilation.
• Mount the braking resistor or reactor in the orientation specified in the data sheet.
• The metal case of the braking resistor must be grounded.
• Use cable with insulation that is capable of withstanding high temperatures.
• Provide independent protection against a loss of control by the braking control system in the
drive - refer to the relevant documentation.
1.7.5 High voltage insulation (flash) testing
High voltage insulation (flash) testing should not be carried out on the drive.
1.7.6 ELV terminals
The control terminals are only single insulated from the mains supply, and hence must be
prevented from human contact by an additional isolation barrier, for example a terminal cover.
1.7.7 SELV terminals
Drive terminals that are SELV can be safely connected to other SELV equipment.
ELV terminals require an additional insulation barrier between them and other SELV equipment if it
is unacceptable to compromise the SELV classification of the SELV equipment.
1.7.8 Products connected by plug and socket
An electric shock hazard exists if the drive is supplied via a plug and socket. When unplugged, the
pins of the plug may carry a potentially lethal voltage until the internal capacitors have discharged.
This can take up to 10 minutes.
It is recommended that a shrouded plug is used that complies with IEC 60309. If the use of a
shrouded plug is not possible, then to avoid any possibility of electric shock from the pins, a means
must be provided for automatically isolating the plug from the drive (for example a latching relay).
1.8

Setting up, commissioning and maintenance

It is essential that changes to the drive settings are given careful consideration.
Depending on the application, a change could have an impact on safety.
Appropriate precautions must be taken against inadvertent changes or tampering.
CAUTION
Some specific settings which require particular care are listed below. This is not an
exclusive list. Other settings may have an impact on safety in specific applications.
1.8.1

Lifting and handling

Many of the drives weigh in excess of 15 kg (33 lb). Use appropriate safeguards when lifting these
models. A full list of drive weights can be found in the installation instructions.
1.8.2

Output circuit and motor protection

The Motor Rated Current parameter must be set correctly to avoid a risk of overheating and fire in
the event of motor overload. In some applications motor temperature protection may also be
required.
1.8.3 STOP, Enable and Safe Torque Off functions (where applicable)
These functions do not remove dangerous voltages from the equipment or any external option unit,
nor do they isolate the motor from dangerous voltages.
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SI-EtherCAT User Guide