Important electrical parameters of the higher-level medium-voltage system	
Local supply network operator			
Point of supply: 
Under responsibility of 
local supply network operator / customer			
			
Neutral-point connection of power system			
	low-resistance earthed			
	compensated			
	isolated			
Maximum short-circuit current I“kmax		kA	
Alternatively, 
maximum system short-circuit rating S“kmax		MVA	
Minimum short-circuit current I“kmin		kA	
Alternatively, 
minimum system short-circuit rating S“kmin		MVA	
Data of higher-level medium-voltage protection	
Current transformer Iprim		A	
Current transformer Isek		A	
			
Type of protection relay applied	
Thermal overload protection available?			Yes		No	
Type of characteristic curves			
	inverse-time-delayed			definite-time-delayed	
Setting zone Ith		A /	time constant: 	min	
Setting zone I>		A / t> 	s	
Setting zone I>>		A / t>> 	s	

Note: 
For preparing a comprehensive, end-to-end protection concept, the precise data of the higher-level medium-voltage protection applied is required, so that the lower-level low-voltage protection system can be adapted in accordance with the MV protection settings.	

With the completed list you have gained an overview of the project.
Do you need detailed information e.g. about concept development or budget estimation?
With the data contained in the checklist, contact your responsible TIP contact person:	
Totally Integrated Power supports electrical designers in different planning stages with software tools, Revit files for Building Information Modeling (BIM), tender specification texts, planning and application manuals and professional consulting by our experienced technical specialists in many countries: www.siemens.com/tip-cs

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