NEMA ICS 18:2001 (R2007)
NEMA ICS 18:2001 (R2007) Industrial Control And Systems: Motor Control Centers Applies to three phase 50 and 60 hertz motor control centers rated not more than 600 volts AC.
Table of Contents
Foreword1GENERAL
1.1ReferencedStandards
1.2Scope
1.3NormativeReferences
1.4Equipment
2DEFINITIONS
3CLASSIFICATIONS
3.1ClassesandTypes
3.2ClassesofMotorControlCenters
3.2.1ClassI-IndependentUnits
3.2.2ClassII-InterconnectedUnits
3.2.3ClassI-SII-S-MotorControlCentreswith
CustomDrawingRequirements
3.3CircuitWiring
3.3.1TypesofWiring
4CHARACTERISTICSANDRATINGS
4.1VoltageRatings
4.2CombinationMotor-ControlUnitRatings
4.3Continuous-CurrentRatingsofBuses
4.4BasisforShort-CircuitCurrentRatingofMotorControl
Centres
4.4.1AvailableShort-CircuitCurrent
4.4.2SeriesCombinationRating
4.5StandardShort-CircuitRatingsofMotorControlCentres
4.5.1RatingsofCombinationMotor-ControlUnitand
Feeder-TapUnits
4.5.2UnitsNotContainingaShort-CircuitProtective
Device
4.5.3SeparatelyDerivedSystems
4.5.4RatingofBusStructure
4.6RangeofOperatingVoltage
5PRODUCTMARKING,INSTALLATIONANDMAINTENANCEINFORMATION
5.1PreventiveMaintenance
5.2Handling,Installation,Operation,andMaintenance
5.3MarkingandLabelling
5.3.1Units
5.3.2Section(s)
5.3.3MarkingException
6SERVICEANDSTORAGECONDITIONS
7CONSTRUCTION
7.1VerticalSection
7.2WiringSpace
7.3UnitMounting
7.4InterlockingofDoors
7.5Spacings
7.6ControlCircuitProtection
7.7LightingPanelandAuxiliaryControlPanelProtection
8PERFORMANCEREQUIREMENTSANDTESTS
8.1DesignTestConcept
8.2TestMethods
8.3HorizontalCommonPowerBusandVerticalExtension
Short-CircuitWithstandTest
8.3.1Tests
8.3.2PerformanceCriteria
8.4CombinationMotor-ControlUnitsandFeeder-TapUnits
Short-CircuitInterruptingTests
8.4.1Tests
8.4.2PerformanceCriteria
8.4.3LocationofUnits
8.4.4UnitFaultConnection
8.4.5EnclosureGroundCircuit
8.4.6TestVoltageandFrequency
8.4.7TestCurrent
8.4.8TestCircuitCalibration
8.4.9TestDutyCycle
8.4.10PerformanceRiseTest
9APPLICATION
9.1TechnicalInformationNeededtoSupplyaMotorControl
Center
9.2ApplicationofShort-CircuitCurrentRatings