Parameters transformer rating s rating in kva voltage rating v voltage rating of thesecondarywindings impedance z perunit impedance of the transformer in can be found on the nameplate typically 4 to 10 notes the transformer fault levelcalculatorassumes that the transformer is supplied from an infinite bus
Hpgr high pressure grinding rolls weir used in mining applications for the last 30 years high pressure grinding rolls hpgr reduce particles by compressing andcrushingthe feed between two counter rotating parallel rollers with a small gap between them this forces the rocks against each other and compresses the feeds density to 80 of its solid volume exceeding its compressive
Oct 09 2020crushing circuitthe equations giving the circulating load rv are functions of e t u karra 1979 where t u are the undersize contents in the new feed and the crusher discharge
Secondarytertiarycrushingcircuits our last schematic represents a closedcircuit this one involves bothsecondaryand tertiarycrushing thiscircuitis employed where either the tonnage or the work index of the ore is high enough to require that thecrushingbe done in stages
Size reduction bycrushinghas a size limitation for the final products if further reduction is required below 5 20mm grinding processes should be used energy and powercalculationsbased on bonds work index wi two stage aggrinding with the primary mill in opencircuitand thesecondarypebble mill in closedcircuit
Secondaryconductor sizing the ampacity of thesecondaryconductor must at least equal the rating of the device supplied by thesecondaryconductors or the ocpd at the termination of thesecondaryconductors sec 24021c2 assume thesecondaryconductors will carry the full capacity of the transformer continuously
Secondaryfullload current i 2 50 1000 400 125 a b turns ratio n 1 n 2 v 1 v 2 4000 400 10 you may also be interested in our voltage dividercalculatoror motor flacalculator
Fig1 approximate equivalentcircuita and b if it is desired to find the parameters of the exact equivalentcircuitof fig 2 it is customary to assume r 1 a 2 r 2 and x 1 a 2 x 2this assumption allows the decomposition of the equivalent resistance and reactance into the primary andsecondary
Jan 20 2020 a simple method for the approximation ofshort circuitcurrent is the infinite busshort circuit calculationmethod this method calculates the worst possible or maximum current that propagates from the transformer in case of ashort circuit
Jan 01 2013 grindingcircuitdata had to be reconciled due to inability tocalculatethe circulating load of these circuits with good accuracy complexcircuitanalysis with data redundancy in mineral processing historically requires a wide sampling campaign and the use of matrixcalculationfor each mineral component present in each considered flow
Jan 28 2019 isec kva rating of the source secondaryside voltage of the transformer by plugging the values we will get isec 100000 220 now we willcalculatethe value of theshort circuitcurrent on thesecondaryside of the transformer it will help the protective device to act accordingly
Sep 29 2020 a problem for solving mass balances in mineral processing plants is thecalculationof circulating load in closed circuits a family of possible methods for the resolution of thesecalculations
Mar 18 2018 flasecondary 1804 amps step 3 calculatethe shortcircuitcurrent on the transformersecondarybus scasecondary 1804 amps x 100 575 097 scasecondary 26845 amps if thiscalculationignored the source and assumed it was infinite the shortcircuitcurrent at thesecondarywould be scasecondary 31374 amps
A quickcalculationfor the maximum fault current at the transformersecondaryterminals is fc fla pu z fc 1202 00575 20904a this quickcalculationcan help you determine the fault current on thesecondaryof a transformer for the purpose of selecting the correct overcurrent protective devices that can interrupt the available fault
Size control incrushingand grinding circuits typical 12 stage orecrushingin agsagcircuit primarycrushingsecondary basics in minerals processing 35 selection of crushers 420 size control incrushingand grinding circuits typical 12 stage orecrushingin agsagcircuit use of a simplified method tocalculateclosed
Crushing circuitin selection and sizing of crusher crushing circuitselection and sizing of crushers guide to the proper selection and sizing of industrial lump breaker selection whilecrushingis governed by basic laws of physics no single law or rule take the place of experience and testing in the selection and sizing of a suitable crusher for a given application a number of
Secondaryamp tertiarycrushingcircuits opencircuit crushingin this sector onsecondaryand tertiary crushingwe will continue the practice of talking about different equipmentthe work it doesand the effects of what i call operating variables calcium carbonate is a chemical compound with the formula caco3 it is a common jaw crusher output fineness 10105mmcapacity 90th get more crusher
Flow diagram of crushersecondaryand tertiary is prudent to have testwork conducted to establish ore flow in a primarycrushing circuitusually includes only a crusher feeder and conveyorsecondaryand tertiary rock processing machine in curshing and screening flow chart as firstcrushingand the impact crusher or cone crusher cwill be used assecondaryor tertiarycrushing
A quickcalculationfor the maximum fault current at the transformersecondaryterminals is fc fla pu z fc 1202 00575 20904a this quickcalculationcan help you determine the fault current on thesecondaryof a transformer for the purpose of selecting the correct overcurrent protective devices that can interrupt the available fault
Sep 10 2020 rating of pricircuitbreaker at point a 400 of pri full load current or next lower standard size overcurrent protection atsecondaryside secondaryvoltage 600v rating of sec fuse circuitbreaker at point b 250 of sec full load current or next higher standard size overcurrent protection atsecondaryside secondaryvoltage 600v
Shortcircuitfaults are called shunt faults an opencircuitcondition is known as a series fault any phasecircuitto ground condition is called a ground fault among all faults a balanced 3phase shortcircuitis the most critical and serious however it is one of the least likely of faults to occur
Use the 3 phase and single phasetransformersizingcalculatorbelow tocalculateprimary andsecondaryfull load current this can also be used as atransformerkvacalculatorandtransformer secondaryshortcircuitcurrentcalculatorcalculatorcan be used for step downtransformeras well as step uptransformersizing applications
I sc 3 ph for point 1 1202 005 24506 a or 245 ka this is the available shortcircuitcurrent at point 1 the shortcircuitcurrent at point 2 will be lower than point 1 due to the line impedance line impedance for the cables will impose the current thecalculationbelow will show the shortcircuitcurrent at point 2
1b secondarycurrentcalculationexample the fuse size must not be greater than 125 of thesecondaryrated current from the eq 2 below 125 of thesecondaryrated current is 533 amps 2 secondarycurrentcalculationexample next the available shortcircuitcurrent at
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