Protective Equipment

Protective devices to be used with various equipment types, circuit types and continuous current rating are defined in this section.

Option Descriptions
Option Description

Equipment

The various equipment types are switchgears, switchboards, panelboards, and so on. For each equipment type, you can enter various protective device amps.

Rating (A)

Continuous current rating of protective device.

Appl

The type of circuit for which the protective device selection is applicable. The circuit type can be motor circuit, feeder/transformer circuit, or all types.

Add Breaker

This button opens the Add Breaker to Design Sheet dialog box for you to specify multiple possible solutions to breaker selection. The fields of the dialog box are described below. The first row in this sheet is shown in the Design Sheet view. While performing Series Coordination of breakers, the specified breakers inside this dialog are evaluated, and the first breaker to be selectively coordinated with the downstream breaker is selected.

  • Class: Protective device class—LVPCB, ICCB, MCCB or fuse.
  • 100% Rated: Select Yes if the protective device is 100% rated. A typical MCCB is not 100% rated.
  • Protective Device (Mfr-Type-Style): The manufacturer name, type name, and style name for the protective device. You can select these fields from the available choices in the boxes.
  • SST: Select the check box if the circuit breaker uses a solid state trip (SST).
  • SST (Mfr-Type-Style): The manufacturer name, type name, and style name for the solid state trip of the protective device.
  • I2t: Select the check box to set the I^2T delay option to “On” for short time delay.
  • ST: Select the check box if the trip unit has short time delay trip settings.
  • Inst: Select the check box if the trip unit has instantaneous trip settings.
  • GF: Select the check box if the trip unit has ground fault trip settings.
  • Motor O/L (Mfr-Type-Style): Details for motor overload relay.
  • Unit Cost (USD): Protective device unit cost used for Bill of Material.

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