Repainting; Corrective Maintenance; Safety Instructions For Repair Work - Siemens SIMOTICS HV C Operating And Installation Instructions

Maintenance

9.4 Corrective Maintenance

9.3.13

Repainting

Explosion hazard caused by incorrect painting
The paint coat can become electrostatically charged where there is a thick coat. Electrostatic
discharges can occur. There is a risk of explosion if potentially explosive mixtures are also
present at this moment. This can result in death, serious injury or material damage.
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:
● Limit the surface resistance of the paint used:
● Breakdown voltage ≤ 4 kV for machines, Groups II and III (gas and dust)
● Limiting the charge transfer:M
● Incapability, dangerous charge to be saved:
9.4 Corrective Maintenance
9.4.1

Safety instructions for repair work

Observe the following when carrying out any work on the machine:
● Comply with the general safety instructions (Page 13)
● Comply with the applicable national and sector-specific regulations.
● When using the machine within the European Union, comply with the specifications laid
94
WARNING
– 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.
– IIB, IIC, III: Surface resistance ≤ 1 GΩ for machines of groups II and III (gas and dust)
– 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)
– 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)
down in EN 50110‑1 regarding safe operation of electrical equipment.
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
Operating Instructions 06/2018