You must comply with one of the following requirements when you repaint painted surfaces:
● Limit the total paint coating thickness according to the explosion protection group:
–
IIB: Total paint coating thickness ≤ 2 mm
– IIC: Total paint coating thickness ≤ 0.75 mm for machines of Group II (gas)
– III: Total paint coating thickness ≤ 0.45 mm for Group III machines (dust)
According to tests, paint repair work up to the total paint coating thickness of the non-
conductive paint coating listed has also been investigated and is harmless.
● Limit the surface resistance of the paint used:
– IIB, IIC, III: Surface resistance ≤ 1 GΩ for machines of groups II and III (gas and dust)
● Breakdown voltage ≤ 4 kV for machines, Groups II and III (gas and dust)
● Limiting the charge transfer:M
– IIB: Limit value for the highest transferred charge < 25 nC
– IIC: Limit value for the highest transferred charge < 10 nC for Group II machines (gas)
– III: Limit value for the highest transferred charge < 200 nC for Group III machines (dust)
● Incapability, dangerous charge to be saved:
– IIB: Limit value for the maximum capacity ≤ 10 pF
– IIC: Limit value for the maximum capacity ≤ 3 pF for Group II machines (gas)
– III: Limit value for the maximum capacity ≤ 10 pF for Group III machines (dust)
9.2 Corrective Maintenance
When carrying out any work on the machine, observe the general safety instructions and the
specifications contained in EN 50110‑1 regarding safe operation of electrical equipment.
See also
Safety information (Page 13)
Note
If the motor has to be transported, please observe the information and instructions in the
"Transport" section.
Maintenance
9.2 Corrective Maintenance
LOHER CHEMSTAR 1PS2
Operating Instructions 08/2016 97
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