SIMOVERT MV Medium-Voltage Drives 660 kVA to 9100 ... - Industry

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SIMOVERT MVEngineering informationDimensioning the power section and driveAir coolingRedundant fans(Option L34)With the “redundant fan”option, when a fan fails, thedrive converter can still beoperated at its full output.Exceptions(see also the following table):This option is not available forthe following drive convertertypes:¦ 2.3 kV: 800 kVA, 1600 kVAand 2400 kVA¦ 3.3 kV: 1000 kVA, 2100 kVAand 3100 kVA¦ 4.16 kV: 1300 kVA,2600 kVA and 4000 kVA¦ 6/6.6 kV: all types.The sound pressure level isincreased by approx. 3 dB(A)when higher-rating fans areused.Note:If the fans, included in optionsL08 (output reactor) and Y15(sine-wave EMC output filter)fail, this results in the drive converterbeing powered-down(tripped).Emergency operation for fanfailure (Option M65)With the “emergency operationin the event of fan failure“option, when a fan fails, thedrive converter can still be operatedat reduced outputs accordingto the following table.Note:If the fans, included in optionsL08 (output reactor) and Y15(sine-wave EMC output filter)fail, this results in the driveconverter being powereddown(tripped).6Rated motor voltage2.3 kV 3.3 kV 4.16 kV 6.0 kV / 6.6 kVRatedoutputPermissible output withoptionRatedoutputPermissible output withoptionRatedoutputPermissible output withoptionRatedoutputPermissible output withoptionL34 M65 L34 M65 L34 M65 L34 M65kVA kVA kVA kVA kVA kVA kVA kVA kVA kVA kVA kVA800 – 640 1000 – 800 1300 – 1000 660 – –1000 1000 800 1300 1300 1000 1700 1700 1360 1000 – –1200 1200 960 1500 1500 1200 2000 2000 1600 1200 – –1400 1400 1100 1800 1800 1440 2300 2300 1840 1300 – –1600 – 1300 2100 – 1700 2600 – 2100 1500 – –1800 1800 1440 2300 2300 1840 2900 2900 2300 1800 – –2000 2000 1600 2600 2600 2100 3300 3300 2640 2000 – –2200 2200 1800 2900 2900 2300 3700 3700 30002400 – 1920 3100 – 2500 4000 – 32004700 – –5200 – –5900 – –6700 – –7200 – –Note:When engineering inlet andoutlet air ducts for drive converterventilation, care must betaken that the air rates quotedin the selection tables for thedrive converters are observed.A pressure drop of 800 Pa thenoccurs between the air entryand air discharge of the driveconverter (detailed informationon request).6/6 Siemens DA 63 · 2004
Water coolingGeneral informationThe cooling unit dissipates driveconverter power loss.It comprises an inner de-ionizedwater circuit and an outer rawwater cooling circuit(see Fig. 6/6).The de-ionized water, whichhas been heated up in the innercooling circuit of the drive converter,is pumped into the stainlesssteel water-to-water platetypeheat exchanger using amaintenance-free circulatingwater pump. The plate-typeheat exchanger is connected tothe raw water circuit at the customer’s.The de-ionized wateris cooled by the raw water ofthe external cooling circuit andthen flows back to the driveconverter (refer to Fig. 3/7).The enclosed inner water circuitis filled with de-ionized water(completely de-salinated water)and is vented via a compensator(reservoir). Hence, thisvessel is situated at the highestpoint of the cooling circuit.Cooling unitHeat exchangerCooling water specifications inthe raw water circuit:¦ Chemically neutral, cleanwater with solids filtered out¦ Max. grain size, of parts in thewater w 0.5 mm¦ pH value 6.0 to 8.0¦ Chlorides < 40 ppm¦ Sulfates < 50 ppm¦ Dissolved solids < 340 ppm¦ Total hardness < 170 ppm¦ Input pressure:min. 2 bar, max. 8 bar¦ Cooling-water quantity:see drive converter selectiontables in Part 3.If values deviate from these,we recommend that the wateris analyzed to ensure a longservice lifetime of the heat exchanger.For aggressive cooling water(also sea water), titanium heatexchanger plates should beused (option).Coolant water requirements inthe de-ionized water systemPurified water for accumulatorsis to be used for filling and refillingthe de-ionized water system(distilled or desalinated water inaccordance with DIN 57510,Chapter 4.6).¦ Specific conductivity whenfilling < 30 mS/cm. After fillingand prior to switching on theconverter, the conductivitymust be reduced to the permissibleoperational value of< 0.6 mS/cm by the built-inion exchanger of the coolingunit.¦ Evaporation residue < 10 mg/l.¦ The water must only bestored in closed containers ofglass or plastic.¦ The pH value must bebetween 5 and 7.¦ There must be no traces ofmetals of the hydrogen sulphidegroup or of iron, nickel,chrome, manganese, or sulfurchloride and nitrogen compounds(qualitatively testedwith the usual reagents).¦ Oxidizable organic substancesmust be present only toa level corresponding toconsumption of 20 mg/l ofpotassium permanganate.Technical dataSIMOVERT MVEngineering informationDimensioning the power section and driveMonitoring equipment in thede-ionized-water circuit:¦ Conductivity value measurement:The conductivity of thecooling water is between0.1 mS/cm and 0.6 mS/cm.This value is continually monitoredin order to ensure thatthe leakage currents in thedrive converter, between differentvoltage levels and withrespect to ground, remainlow. An ion exchanger keepsthe conductivity under thepermissible maximum value.If the conductivity is excessive,the filling of the ion exchangermust be replaced.The ion exchanger filling usuallylasts for at least 2 yearsafter the first year, and can bereplaced during operationwithout any risk.¦ Temperature monitoring¦ Flow monitoring¦ A reservoir to equalizechanges in the cooling watervolume as a resultof vaporization ortemperature fluctuation¦ Pressure display in the driveconverter water intake¦ Evaluation of the measuringdata and control of the electricalequipment is carried outin the cooling unit and theoperating status is then signalledto the drive converter.Supply voltage 3-ph./N/PE/400 V AC ± 10%50/60 Hz ± 3%Raw-water circuitWater intake temperature min. + 5 °Cmax. +35 °CWater discharge temperature max. +40 °CPressure dropmax. 1 barAvoidance of moisturecondensationIn order to avoid moisturecondensation at low raw watertemperatures, a 3-way valve(option W50) can be installed asan option to control the watertemperature. This is recommendedif the raw water isexpected to be more than 5 Kcolder than the ambient temperature.The flow quantity canonly be reduced (in order tore-duce raw-water consumption)if the raw water does notcontain any suspended solidswhich would then be depositedin the heat exchanger at lowflow velocities.Redundancy (option)When requested, the coolingunit can be designed with redundancyor partial redundancy,i.e. two heat exchangersand two pumps are used, oronly two pumps. In this case,defective parts can be replacedwhile the system is operational.6Siemens DA 63 · 2004 6/7
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SIMOVERT MV Medium-Voltage Drives 660 kVA to 9100 ... - Industry

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