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ProSpray 20
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Operating voltage
The operating voltage is the voltage present between the conductors during full function.
External conductor
External conductors are live conductors.
Neutral conductor
A neutral conductor is connected to the neutral point and star point, and is capable of contributing to the transmission of elec-
trical energy.
Protective conductor
A protective conductor is necessary for certain protective measures against shock currents, in order to establish an electrical
connection to one of the following parts.
- exposed conductive part of the electrical equipment
- external conductive parts
- earth electrodes, equipotential bonding
Earth fault
An earth fault is an electrical connection between an external conductor or neutral conductor to the protective conductor.
Interwinding fault
An interwinding fault is a short in a winding of the motor. This winding has a diff erent resistance to the other windings.
PEN conductor
A PEN conductor is an earthed conductor which performs the function of protective conductor and neutral conductor simulta-
neously.
Active part (of an electrical system)
An active part is a live part of an electrical system or device (e.g. fuses, terminals, switches, capacitors, etc.) through which current
fl ows during normal operation
Emergency switch, emergency stop
This switch is identifi ed by its colouring (red on yellow) and serves to stop hazardous states or hazardous movements. The emer-
gency switch does not serve for switching during normal operation or isolation in accordance with the Five Safety Rules (1.5).
Isolation
This is the disconnection of a system or its equipment from all sources.
Basic insulation
This is the insulation of active parts during normal operation to protect against direct contact.
Direct contact
This is direct contact between an active part of an electrical system (an external conductor/phase) and the human body in nor-
mal operation.
Indirect contact
This is indirect contact between an active part and the human body due to an existing insulation fault. The housing of an electri-
cal device which is not live under normal conditions is contacted (fault).
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