REFU REFUsol 08K Installation And Operating Manual

Contents

REFU REFUsol 08K Installation And Operating Manual Manual pdf 13 page image

REFU Elektronik GmbH REFUsol 08K ... 23K 133 Description of Device3.1 Infastructure RequirementsAdditional required equipment 08K – 20K at the low voltagenetwork23K at the medium voltagenetworkAC load break switch necessary necessaryCentral grid protection device(VDE-AR-N 4105)only for systems above 30 kVArequiredonly for systems above 30 kVArequiredMedium voltage transformer not necessary necessaryThe following points are to be considered when planning the infrastructure:• The 08K – 20K can only feed into the low-voltage grid.• The 23K can only feed into the medium-voltage grid.• The 5-wire power supply line must be equipped with an appropriate AC disconnecting device.• The 23K is not equipped with internal potential isolation.• If the inverters are connected with the medium-voltage-grid, it must be operated with electricallyisolating transformers.• No other equipment may be connected between the transformer and inverters.The following standards and technical regulations are also to be observed:IEC 60364-4-41 Protection: Protection against electric shockIEC 60364-4-43 Protection for safety - Protection against overcurrentIEC 60364-5-52 Selection and erection of electrical equipment - wiring systemsBDEW Technical GuidelinesVDN Technical GuidelinesFor the 23K an isolating transformer with the following specifications is required:Specification of medium voltage transformers 23KRated power 23 kVARated voltage OS Electricity UtilityRated voltage US 3 x 460 V PE + NFrequency 50/60 HzShort-circuit voltage uk Electricity UtilitySwitching group Dyn5 oder Dyn11Protection Outdoor use IP65 or protected