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:

Field Name	Field Type	Description
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.

Field Name	Description
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).