Nordson Encore HD iControl 2, Установка, устранение неисправностей, ремонт

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© 2022 Nordson Corporation
1609758-04
3-11 Installation
Grounding
WARNING: Consoles and all conductive equipment in the spray area MUST be con-
nected to a true earth ground. Use the provided ground cables to ground the consoles.
Mount junction boxes and control panels to grounded stands or the booth base. Failure
to observe this caution could result in severe shocks to personnel, fire, or explosion.
Proper grounding of all conductive components of a powder coating system provides
both shock and electrostatic discharge protection for both operators and sensitive
electronic equipment. Many system components (booth, collector, color modules, control
consoles, and conveyor) are connected both physically and electrically. It is important that
the proper grounding methods and equipment are used when installing and operating the
system.
PE (Protective Earth) Grounding
PE grounding is required on all conductive metal electrical enclosures in a system. PE
grounding is provided by a ground conductor wire bonded to a true earth ground. PE
grounding protects operators from electrical shock by providing a path to ground for
electrical current if a conductor contacts an electrical enclosure or other conductive
component. The ground conductor wire carries the electrical current directly to ground
and short circuits the input voltage until a fuse or circuit breaker interrupts the circuit.
The sole purpose of the green/yellow ground wires bundled with the AC input power
cable is to protect personnel from a shock. They must be used for PE grounding only.
These ground wires do not protect equipment against electrostatic discharge.
Electrostatic Grounding
Electrostatic grounding protects electronic equipment from damage caused by
electrostatic discharges (ESD). Some electronic components are so sensitive to ESD that
a person can deliver a damaging static discharge without feeling even a mild shock.
Proper electrostatic grounding is mandatory in an electrostatic powder coating system.
Powder spray guns generate electrostatic voltages up to 100,000 V. It does not take long
for ungrounded system components to build up an electrical charge strong enough to
damage sensitive electronic components when discharged.
Electrostatic discharges occur at very high frequencies, around 100 MHz. An ordinary
ground conductor does not conduct such high frequencies well enough to prevent
damage to electronic components. Special flat-braided cables are provided with Nordson
powder coating equipment to protect against ESD.