Medium-voltage switchgear	
	
Type of installation			
	At the wall			Stand alone	
Installation site/altitude (above sea level)		/	m	
Room/door dimensions			
Rated voltage			12 kV		24 kV		kV	
Operating voltage			10 kV		20 kV		kV	
Rated operating current of the busbar			630 A		A			
Rated short-time current (1 s)			16 kA		20 kA		kA	
Internal arcing qualification			IAC (Internal Arc Classification)	
Type of pressure relief (note room height)			
	Pressure relief downward			Pressure relief backward/upward	
	Pressure relief upward with pressure absorption				
Low-voltage compartment (as top unit for protective devices, measuring instruments …)			600 mm		900 mm	
Number of switchgear panels can be extended			Yes		No	
Maintenance-free switchgear			Yes		No	
Further points that should be considered when planning/dimensioning medium-voltage switchgear:	
Power system parameters	
Neutral-point connection			
Load flow, power to be distributed			
Cable / overhead line network			
Overvoltage protection			
Power quality (unsteady loads)			
System protection	
Integration of the system protection concept of the local network operator			
Use of SIPROTEC protective devices			
Specify protective function numbers 
according to ANSI			
Energy automation solution planned			Yes		No	
Specify the requested functions			
Visual display system 
(HMI – Human Machine Interface)			
Systems to be connected			
	Protection			Substation automation	
	Power Quality			Control Center	
	Process automation			Other	
			
Operating area	
Access to the operating area 
(skilled personnel only)			Yes		No	
Installation: 
Arrangement, required space ( panel width)
False floor / cable routes
Operation/installation corridor			
Transportation routes			
Pressure relief of the switchgear room			
Environmental conditions	
Ambient temperature			
Climatic conditions (pollution, salt, humidity, aggressive gases)			
Installation altitude (note derating factor for more than 1000 m above sea level)			
Sector-specific application	
Switching duty			
Switching frequency of the consumers			
Availability			
Service/maintenance			
			
Operation	
Operation (handling, clearness …)			
Operator protection			
Expansion capability of the system			
Operator control (monitoring and switching)			
Control and monitoring			
Interlock concept			
Measurement and metering			
Integration of the system operation and the production process			
Standards and regulations	
Regulations of the local network operator 
(Technical Supply Conditions)			
Electrical standards (IEC)			
Association guidelines (BDEW / FNN)			
Statutory regulations			
Internal regulations			

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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