LV Breaker - Ground Trip Tab

This tab section is applicable for solid state trip devices, but not for thermal magnetic and non-solid state trip devices.

Figure 1: Ground Trip Dialog Box for Solid State Trip

Option Descriptions
Option Description

Plot Ground TCC

For solid state trip devices, this field can be checked to plot TCC or unchecked to avoid plotting the TCC of the ground trip characteristics.

Solid State Trip

This section shows the kind of trip unit selected and other descriptions of device selected in the Specifications tab such as the manufacturer (Mfr), Type, Style, Sensor rating, and Plug/Trip value of trip unit.

Ground Trip

This section is for setting the ground fault pickup, the type of delay and the delay time.

  • Pickup: The ground fault pickup setting, which is either in amps or multiple of sensor, plug, or setting C.
  • (I^x)t: To select shape and slope of ground fault delay band. When you select In, the (I^x)t function is enabled. The delay band has a slope of minus “x”. When you select Out, the (I^x)t function is disabled and the delay is independent of the current.
  • Delay: Ground fault delay setting to select the delay band.

Maint-GF

This is the ground instantaneous setting used during maintenance to lower the arc flash hazard. The name of this section may be manufacturer specific such as ARMS, Maint Mode, RELT, Quick-Trip, etc. The On/Off switch for the maintenance mode is the check box on the Phase Trip tab.

Pickup

Setting for the maintenance mode trip for ground fault.

More Information