This section describes the general settings in the distribution equipment dialog boxes. This area is used to specify values related to load, voltage, connection type and more. The information listed below is applicable to all distribution equipment unless otherwise indicated.
Connected Load: The connected load on the panel, in kVA and in amps.
Calculated Load: The calculated load on panel, including all of the diversity factors, in kVA and in amps.
Volts: The voltage of the equipment. Does not apply to low voltage panels, transformers and UPSs.
The Volts setting can be changed when there are no connections to or from the distribution equipment. If the equipment is connected to another equipment, another equipment is connected to it, or any branch circuit devices are connected, the Volts setting cannot be directly changed. Instead, use the Change button to change the Volts of the equipment. This button is required to properly handle anything that is already connected. See the Changing the Voltage of Distribution Equipment section below for more information.
Primary/Input Volts / Secondary/Output Volts: The primary or input voltage and secondary or output voltage of the equipment. Applies to transformers and UPSs. If the transformer or UPS is connected to another, different equipment, use the Change button to change this setting.See the Changing the Voltage of Distribution Equipment section for more information.
The Primary Volts and Secondary Volts settings for transformers must both be single-phase or three-phase. The Input Volts and Output Volts settings can be different phases for UPSs.
Bus Amps: The size of the bus in amps. Applies to panels, switchboards, bus gutters/bus ducts, motor control centers, and meter centers.
Motor control centers have two settings: Horizontal Bus Amps and Vertical Bus Amps.
Main Disconnect Type: The type of disconnect for the equipment. The graphics on the panel bus on the one-line diagram are controlled by this field. Applies to panels, switchboards, motor control centers, and meter centers.
| • | Main Lugs Only: The bus bar on the one-line diagram does not have a disconnect in it. |
| • | Breaker: The bus bar on the one-line diagram includes a breaker graphic. |
| • | Fused Switch: The bus bar on the one-line diagram includes a fused switch graphic. |
Trip: The trip size of the main disconnect breaker or fused switch, in amps. This value cannot be set if Main Disconnect Type is set to Main Lugs Only. Applies to panels, switchboards, motor control centers, and meter centers.
Frame: The frame size of the main disconnect breaker or fused switch, in amps. This value cannot be set if Main Disconnect Type is set to Main Lugs Only. Applies to panels, switchboards, motor control centers, and meter centers.
Set Curve: Press this button to configure the curve for the main disconnect breaker or fused switch. The Select Curve dialog box will appear. If Main Disconnect Type is set to Main Lugs Only, this button is disabled. Applies to panels, switchboards, motor control centers, and meter centers.
Mounting: How the equipment is mounted. The value of this setting can be displayed on the distribution equipment schedule. It is for informational purposes only and is not otherwise used. Does not apply to transformers, enclosed breakers/disconnects, or low voltage panels.
Neutral: The size of the distribution equipment neutral. The value of this setting can be displayed on the distribution equipment schedule. It is for informational purposes only and is not otherwise used. Applies to panels, switchboards, UPSs, transfer switches, and meter centers.
Number of <Connection Types>: How many connection locations are available on this equipment.
The label on this field depends upon the equipment type. The possible labels include Number of Poles, Number of Positions, Number of Lugs, Number of Taps, Number of Starters, and Number of Breakers.
Starting <Connection Type>: The number used for numbering the connection type listed.
The default is to start at the number 1 and go from there. However, in some cases, it is important to be able to start the numbering at a different point.
For example, on a two-section panel that is treated like an 84-circuit panel, the circuits are numbered from 1 to 42 and 43 to 84. On the second panel, you would set the Starting Circuit to 43.
The label on this field depends upon the equipment type. The possible labels include Starting Circuit, Starting Position, Starting Lug, Starting Tap, Starting Starter, and Starting Breaker.
Lugs: The lugs available on the device. This setting controls the type of connection you can make using the Connect Distribution Equipment command and the graphics displayed on the bus bar on the one-line diagram. Applies to panels, switchboards, enclosed breakers/disconnects, transfer switches, and meter centers.
| • | STANDARD: One set of lugs at the top of the bus. |
| • | DOUBLE: Double lugs located at the top of the bus. Enables the Top Lugs option in the Connect Distribution Equipment command. |
| • | FEEDTHRU: Lugs located at the top and bottom of the bus. Enables the Feedthrough option in the Connect Distribution Equipment command. |
IG Bus: Whether the equipment contains an isolated ground bus. The value of this setting can be displayed on the distribution equipment schedule. It is for informational purposes only and is not otherwise used. Applies to panels, switchboards, UPSs, transfer switches, and meter centers.
Layer System: See the Layer System section for more information.
Changing the Voltage of Distribution Equipment
When a distribution equipment is first created, it is possible to change the voltage using the Volts field. When the device is connected to another device, another device is connected to it, or any branch circuit devices are connected, the Volts setting cannot be directly changed. Instead, use the Change button to change the Volts of the device. This button is required to properly handle anything that is already connected.
Press the Change button to display the Change Volts dialog box. The dialog box that is displayed depends upon whether you are changing the voltage of a transformer or another type of distribution equipment.
Change Volts Dialog Box (Non-transformers)
The dialog box shown below is used for distribution equipment other than transformers:
Current Volts: The current voltage supplied to the distribution equipment.
New Volts: A list of the current and possible voltages for the equipment. The listed voltages are the ones that share at least one circuit voltage in common.
Change Volts Dialog Box (Transformers and UPSs)
The dialog box shown below is used for transformers and UPSs:
Primary Volts: The primary voltage supplied to the transformer.
Current Volts: The current voltage supplied to the transformer.
New Secondary Volts: A list of the current and possible voltages for the transformer. The listed voltages are the ones that share at least one circuit voltage in common.
The Primary Volts and Secondary Volts settings for transformers must both be single-phase or three-phase. The settings can be different phases for UPSs.
Specifying the New Voltage
Select the desired new voltage and press the OK button. The Design Master Electrical dialog box shown below will appear.
When the voltage on the distribution equipment is changed, the circuited devices are all checked for consistency. Any devices that cannot be connected to the newly selected voltage are removed and devices that can remain connected do so.
All distribution equipment connected to the selected equipment are disconnected. The distribution equipment is also disconnected from the device to which it was connected. These connections must be reestablished using the Connect Distribution Equipment command.