Widinovations Widlaser C500, User Manual

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3.3
According to this classification, the widlaser C500 is a Class I product.
These appliances must have their chassis connected to electrical earth (US: ground) by a separate earth
conductor (colored green/yellow in most countries, green in the US, Canada and Japan). The earth connection is
achieved with a 3-conductor mains cable, typically ending with 3-prong AC connector which plugs into a
corresponding AC outlet. The basic requirement is that no single failure can result in dangerous voltage becoming
exposed so that it might cause an electric shock and that if a fault occurs the supply will be removed automatically (this
is sometimes referred to as ADS = Automatic Disconnection of Supply).
A fault in the appliance which causes a live conductor to contact the casing will cause a current to flow in the
earth conductor. If large enough, this current will trip an over-current device (fuse or circuit breaker (CB)) and
disconnect the supply. The disconnection time has to be fast enough not to allow fibrillation to start if a person is in
contact with the casing at the time. This time and the current rating in turn sets a maximum earth resistance
permissible. To provide supplementary protection against high-impedance faults it is common to recommend a
residual-current device (RCD) also known as a residual current circuit breaker (RCCB), ground fault circuit interrupter
(GFCI), or residual current operated circuit-breaker with integral over-current protection (RCBO), which will cut off the
supply of electricity to the appliance if the currents in the two poles of the supply are not equal and opposite.
2.3. Safety precautions
The machine must only be operated by trained and authorized personnel. It is the duty of the operator, to check
the machine before start of work for externally visible damage and defects, and to immediately report changes that
appear (including behavior during operation) that affect the safety. Preparation, retooling, change of work piece,
maintenance and repair activities must only performed with equipment buttoned off, by trained personnel.
Principally, no safety components may be removed or disabled (already here we emphasize the imminent
dangers, for example severe burns, loss of eye-sight). If the removal of safety components is re- quired during repair
and service, the replacement of the safety components must be performed immediately after completion of the
service and repair activities. No working methods are permitted that affect the safety of the machine.
It is absolutely forbidden for anyone who is under the influence of drugs, alcohol or reaction-impairing
medication to work with the machine.
The scopes of competence for the different activities in the scope of operating the machine must be clearly
defined and observed, so that under the aspect of safety no unclear questions of competence occur.
This applies in particular to activities on the electric equipment, which must only be performed by special experts.
Activity Intended group of users
Operation/Maintenance Trained personnel
Other activities
(e.g. error correction, technical service)
Specially trained personnel or hired
tradesmen