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Safety Information and Precautions
Safety Information and Precautions
This User Guide is packaged together with the NICE3000
new
Controller AC Drive. It contains basic
information for quick start of the drive. For safety and more information, please refer to the NICE3000
new
Advanced User Guide, which can be downloaded on the website http://www.inovance.cn.
Electrical Safety
Extreme care must be taken at all times when working with the AC Drive or within the area of the AC Drive.
The voltages used in the AC Drive can cause severe electrical shock or burns and is potentially lethal. Only
authorized and qualied personnel should be allowed to work on AC Drives.
Machine/System Design and Safety of Personnel
Machine/system design, installation, commissioning startups and maintenance must be carried out by
personnel who have the necessary training and experience. They must read this safety information and the
contents of this manual. If incorrectly installed, the AC Drive may present a safety hazard.
The AC Drive uses high voltages and currents (including DC), carries a high level of stored electrical energy
in the DC bus capacitors even after power OFF. These high voltages are potentially lethal.
The AC Drive is NOT intended to be used for safety related applications/functions. The electronic “STOP &
START” control circuits within the AC Drive must not be relied upon for the safety of personnel. Such control
circuits do not isolate mains power voltages from the output of the AC Drive. The mains power supply must
be disconnected by an electrical safety isolation device before accessing the internal parts of the AC Drive.
Safety risk assessments of the machine or process system which uses an AC Drive must be undertaken
by the user and or by their systems integrator/designer. In particular the safety assessment/design must
take into consideration the consequences of the AC Drive failing or tripping out during normal operation
and whether this leads to a safe stop position without damaging machine, adjacent equipment and machine
operators/users. This responsibility lies with the user or their machine/process system integrator.
System integrator/designer must ensure the complete system is safe and designed according to the
relevant safety standards. Inovance Technology and Authorized Distributors can provide recommendations
related to the AC drive to ensure long term safe operation.
The installer of the AC Drive is responsible for complying with all relevant regulations for wiring, circuit
fuse protection, earthing, accident prevention and electromagnetic (EMC regulations). In particular fault
discrimination for preventing re risk and solid earthing practices must be adhered to for electrical safety (also
for good EMC performance). Within the European Union, all machinery in which this product is used must
comply with required directives.
Electrical Installation - Safety
Electrical shock risk is always present within an AC Drive including the output cable leading to the motor
terminals. Where dynamic brake resistors are fitted external to the AC Drive, care must be taken with
regards to live contact with the brake resistors, terminals which are at high DC voltage and potentially
lethal. Cables from the AC Drive to the dynamic brake resistors should be double insulated as DC voltages
are typically 600 to 700 VDC.
Mains power supply isolation switch should be tted to the AC Drive. The mains power supply must be
disconnected via the isolation switch before any cover of the AC Drive can be removed or before any
servicing work is undertaken stored charge in the DC bus capacitors of the PWM AC drive is potentially
lethal after the AC supply has been disconnected. The AC supply must be isolated at least 10 minutes
before any work can be undertaken as the stored charge will have been discharged through the internal
bleed resistor tted across the DC bus capacitors.
Whenever possible, it is good practice to check DC bus voltage with a VDC meter before accessing the AC
drive bridge. Where the AC Drive input is connected to the mains supply with a plug and socket, then upon
disconnecting the plug and socket, be aware that the plug pins may be exposed and internally connected to
DC bus capacitors (via the internal bridge rectier in reversed bias). Wait 10 minutes to allow stored charge
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