SAMES KREMLIN PPH 308 User Manual page 9

WARNING : The use of extra high voltage power increases the risk of sparks. SAMES KREMLIN
atomizers and high-voltage electrostatic generators are designed to minimise this risk.
Although the HV electrode is the only accessible part, a safety distance of X mm (see table
below) must be maintained between the HV parts of the atomizer and all grounded parts.
PPH 308 with high voltage unit (HVU) 188 and 9m-long HV cable:
Authorised spraying distance
Voltage
(kV)
0
50
60
70
80
90
100
The authorised operating distances specified in this manual are calculated on the basis of the
total length of high voltage cables (electrical capacities). The atomizer must be connected to
the HV socket on the HVU only with a single length of HV cable, with on intermediate part.
In addition, a careful check must be made to ensure that any conducting or semi-conducting
part closer than 2.5 m to the atomizer is properly grounded.
If not, electrical charges capable of causing sparks could build up on it. The same applies to
operating staff, which is why antistatic shoes and gloves should be worn to protect against this
hazard.
Each substrate must have a ground resistance of less than or equal to 1 MΩ (measurement
voltage at least 500V). This resistance value must be regularly checked.
All conductive casing or lining of electrical equipment and conductive components in
potentially explosive atmospheres must be grounded by connecting them to the grounding
terminal.
Finally, and for the same reasons, the floor in the area in which the operator works must be anti-
static (bare concrete, metal duckboard, etc.).
It is essential to provide sufficient ventilation in the spraying booths to avoid the build up of
inflammable vapours.
The correct operation of the overcurrent protection (di/dt) must be verified daily. This check
must be carried out in an area with no explosive atmosphere, by placing a ground wire near
the electrode, with the atomizer switched on (the operator must by grounded): the control
module must switch to the fault state.
The associated apparatus must be located outside hazardous areas, and its operation must be
interlocked with that of the booth extraction fan. The correct operation of the servocontrol
Index revision : C - November 2017
Distance
(mm)
75
135
150
9
Safety distance 'X' as a function of voltage
160
140
120
100
80
60
40
20
0
0 50 60
Voltage (kV)
Non-authorised spraying area
70 80 90 100
7030