Table of Contents
Part1-ACTRANSFERSWITCHEQUIPMENT
1GENERAL
1.1ReferencedStandards
1.2Scope
2DEFINITIONS
2.1SwitchingDevices
2.2OperationofACTransferSwitchEquipment
3CLASSIFICATIONS
4CHARACTERISTICSANDRATINGS
4.1RatedandLimitedValuesfortheMain(Power)Circuit
4.1.1SystemVoltageRatings
4.1.2ContinuousCurrentRating
4.1.3RatingBasedonLoadCharacteristics
4.1.4InterruptingRating
4.1.5MotorStarterRating
4.1.6WithstandandClosingRatings
4.1.7OvercurrentProtection
5PRODUCTMARKING,INSTALLATION,ANDMAINTENANCEINFORMATION
5.1Markings
5.1.1TransferSwitches
5.1.2BypassIsolationSwitchEquipment
5.1.3ControlCircuits
5.1.4MaintenanceofTransferSwitchEquipment
6SERVICEANDSTORAGECONDITIONS
7CONSTRUCTION
7.1Spacings
7.2TestSwitch
7.3Interlock
7.3.1ProtectionfromCross-Connection
7.3.2BypassIsolationSwitchInterlock
7.4ServiceEquipment
7.5FirePumpCircuitService
7.6EmergencyPowerCircuitService
7.7ControlCircuits
8PERFORMANCEREQUIREMENTSANDTESTS
8.1PerformanceRequirements
8.1.1ControlCircuits
8.1.2Ground-FaultProtection
8.1.3UndervoltageMonitoringCharacteristics
8.2DesignTests
8.2.1General
8.2.2TestSequence
8.2.3TestSamples
9APPLICATIONS
9.1MotorTransfer
9.2ACTransferSwitchEquipmentSpecification
9.3FeaturesforParticularApplications
AnnexAShortTimeRating
AnnexBNeutralConductorsinPowerTransferSystems Abstract
Applies to electromechanical automatic and non-automatic transfer switches and bypass isolation switches rated 600 volts AC or less, 60 Hertz, for use on single-phase and polyphase AC circuits.
