Siemens SIMOTICS DP 1PC134, Руководство по эксплуатации

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The necessary ESD protective measures for electrostatic sensitive devices are illustrated once
again in the following drawings:
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a = conductive floor surfaceb = ESD table c = ESD shoes
d = ESD overall e = ESD wristband f = cabinet ground connection
2.7 Processes that generate high levels of electrostatic charge
Processes that generate high levels of electrostatic charge
Processes that generate high levels of electrostatic charge, which are far higher than those
generated through manual rubbing, include the following:
● Operation of high-voltage electrodes and ionizers
● Presence of high-speed particles on surfaces, e.g. sprayed charges (electron and ion flows)
in electrostatic coating processes
● Pneumatically conveyed dusts and bulk goods
● Flowing or hydraulically conveyed liquids and drops
● Belts, brushes and foils etc. moved by machines
Risk of explosion as a result of processes with high levels of electrostatic charging
Processes with high levels of electrostatic charging can result in propagating brush discharge/
brushing discharge and explosion
This can result in death, serious injury or material damage.
● Avoid all of these processes in areas where there is risk of gas and dust explosions at non-
metallic exposed components, e.g. paint finishes. These discharge types are not addressed
in current standards.
● The non-metallic exposed components, e.g. paint finishes are subject to an electrostatic
suitability test in the factory. When supplied, the motor has its original paint finish.
Use the tested, original paint when repainting or touching up. It is possible to use a paint that
has not been tested by Siemens, which is however suitable from an electrostatic
perspective. The operating company is responsible for carrying out an electrostatic test of
the complete system.
Safety instructions
2.7 Processes that generate high levels of electrostatic charge
1PC134, 1PC136 crane motors SH 132 ... 315
Operating Instructions, 02/2019, A5E43212221A
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