Siemens Industry Online Support
Siemens AG
Entry type: FAQ Entry ID: 109760221, Entry date: 10/16/2018

How do you protect the modules SITOP PSU8200 20 A and SITOP modular 40 A in networks badly affected by harmonics?

  • Entry
  • Associated product(s)
In the case of networks badly affected by harmonics we recommend increased protection of the 3-phase power supplies SITOP PSU8200 20 A and SITOP modular 40 A.

The recommendations in the customer documentation with regard to power breaker types and setting values are possibly not adequate.

Use the SIRIUS power breakers 4.5...6.3 A with article number 3RV2011-1GA10 and select the following setting values.

Power supplyArticle numberPower breakerSetting value
SITOP modular 40 A6EP1437-3BA00 3RV2011-1GA106  A
SITOP PSU8200 20 A 6EP3436-8SB00-0AY03RV2011-1GA105.5 A

Table 1

Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit