Switch

Switches are used to disconnect circuits. Switches are installed at strategic locations throughout distribution feeder circuits to redirect power flows to balance loads or for sectionalizing to allow repair of damaged lines or equipment. Switches may act as tie devices, which are set in an open state and energized from two directions at once. Switches can be manually or power operated and can be operated individually or as a group.

Switches are rated by continuous current and maximum operating voltage. Continuous current is the manufacturer-designated limit in rms amperes that the device can carry continuously without observable rise in temperature. Maximum operating voltage is the maximum designated rms value of power frequency voltage that may be applied continuously between the terminals of the switch.

Automated switches may have pole-mounted control cabinet housing switch controller, battery, and local control switches. They may also provide the RTU and communications systems for SCADA operation.

The DESIGNBANK model name is used by the Work Function tool in Designer. It designates a banked feature in the network.

Electric Tracing using the PROTECTIVE model name to identify the features that may be returned as protective devices. Structural Analysis (Designer) also uses the PROTECTIVE model name.

Feeder Manager uses the SWITCH model name to identify the switch feature class.

The Switch class inherits attributes from the ElectricDevice abstract class. All model names assigned to the ElectricDevice class should be assigned to the Switch class as well.

Associations: SwitchUnit

Subtypes: Overhead Disconnect, Overhead Load Break, Underground Disconnect, Underground Load Break. The use of subtypes is optional. The Subtype attribute can be removed if subtypes aren't used in the model.

Model Names: DESIGNBANK, PROTECTIVE, SWITCH

Attributes:

Field Name

Field Type

Description

GangOperated

text

Code indicating whether switch is group operated; values are Yes or No.

LabelText

text

Used to maintain information about related circuits.

ManuallyOperated

text

Code indicating whether switch is manually operated; domain values are Yes or No.

MaxContinuousCurrent

double

Code indicating maximum continuous current rating of Switch in amps; domain values include 100 Amps, 200 Amps, etc.

MaxOperatingVoltage

long integer

Code indicating maximum operating voltage for which Switch is rated; domain values include 4.16/7.2 kV, 7.2/12.4 kV.

NormalPosition[A,B,C]

long integer

Code indicating normal position of Switch, per phase; domain values include Closed, Open, and Not Applicable. This attribute results in three fields (NormalPosition_A, NormalPosition_B, NormalPosition_C). Assign the corresponding model name to each field: NORMALPOSITION_A, NORMALPOSITION_B, NORMALPOSITION_C.

PreferredCircuitSource

text

Defines preferred circuit source.

PresentPosition[A,B,C]

long integer

Code indicating present position of Switch, per phase; domain values include Closed, Open, and Not Applicable.

SCADAControlID

text

ID of SCADA control.

SCADAMonitorID

text

ID of SCADA monitor.

TieSwitchIndicator

text

Code indicating whether switch acts as a tie device; values are Yes or No.

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