Switch Unit

Switches are used to disconnect circuits for line sectionalizing, isolating equipment, and feeder realignment on distribution circuits.

Designer uses the DESIGNUNIT model name on this class to designate it as an electric device unit object class. The Designer Work Function Tool uses this model name to identify all electric device unit object classes.

Associations: Switch

Subtypes: None

Model Names: DESIGNUNIT

Attributes:

BILRating: long integer - Code indicating rating of SwitchUnit BIL; values include 95 BIL, 125 BIL, etc.

ContactType: text - Code indicating type of contact of SwitchUnit; domain values include Posi-Lock and Standard.

GroundResistance: long integer - Resistance of ground of SwitchUnit in ohms.

InterruptingMechanismType: text - Interrupting mechanism of SwitchUnit.

InterruptingMedium: text - Code indicating interrupting medium of Switch; domain values include Air, Oil, SF6, Vacuum, etc.

Manufacturer: text - Manufacturer of the SwitchUnit.

MaxInterruptingCurrent: double - Code indicating maximum current in amps that opens SwitchUnit; domain values include 50 amps, 60 amps, 200 amps, etc.

SwitchObjectID: long integer - ObjectID of associated Switch.

International Data Model

In addition to the attributes listed above, the following attributes are used by the international electric data model.

AssemblyClass - A classification of switches according to an accepted standard, such as IEC 622771-100, giving indication of electric and mechanical endurance

BreakingVA - Short circuit current breaking capacity for voltages in the rated voltage range (value is in Volt-Amperes)

CapacititiveBreakingCapacity - Breaking capacity for capacitive current (in Amperes)

GasVolumePressue - Pressure rating for interrupting medium (gas)

GrossWeight - Gross weight of switch unit, including ancillary equipment or cabinets (KG or LBS)

IntrinsicMakeTime - Minimum time needed to make (Seconds)

MakingCurrent - Short circuit making capacity (Amperes)

MotorVoltage - Rated operating voltage of the motor operator for the switch (Volts)

NoOfMakes - Maximum number of makes after power loss

NoOfShortCircuits - Maximum number of operations before lock out (auto reclosing switches only)

Reclosing - Indicates whether the switch has automatic reclosing capability

RestrictingVoltage - The maximum rated operating voltage of the switch unit (Volts)

ShortCircuitCurrent100ms - 100-millisecond short-time current carrying capability (Amperes)

ShortCircuitCurrent1s - 1-second short-time current carrying capability (Amperes)

ShortCircuitCurrent3s - 3-second short-time current carrying capability (Amperes)

VisualEartchIndicator - Indicates whether the equipment has a visual grounding indicator

Weight - Weight of switch unit (KG or LBS)