PowerCommand™ Control Amp Sentry™ Protective Relay

The PowerCommand™ Control Amp Sentry™ Protective Relay is a UL listed over-current protective relay that guards the alternator and power system from the effects of over-current, over/under voltage, under frequency and overload conditions. The time-current characteristics of the Amp Sentry Protective Relay are shown in form number R-1053.

The PowerCommand Control Amp Sentry has been modelled as a component device in SKM System Analysis© software so that the information needed regarded the time-current characteristics is readily available for use in protection and coordination studies. SKM System Analysis© is used to perform electrical system studies such as load flow analysis, short circuit analysis and coordination studies.

How do I access the Amp Sentry™ library file in the SKM Power*Tools for Windows version 6.5?

The time-current characteristics information of the Amp Sentry Protective Relay has been stored in a device data file or library file called the AmpSentry.lib. The device currently exists in the standard Power*Tools for Windows (PTW) protective device library file in SKM. It was created in the CAPTOR/Motor/Gen/Xfmr Protection/Motor Over Load library category.

Step 1: Start PTW

Step 2: Open the existing PTW.lib file by selecting the Document pull-down menu.  Select the Library menu item.

Step 3: In the "Select Document Type" dialog, select "PTW Library" and click on the "OK" button.

Step 4: Select the PTW.lib file and click open.

Step 5: The Amp Sentry Protective Relay exists in the CAPTOR/Motor/Gen/Xfmr Protection/Motor Over Load category of the library. Expand the CAPTOR and then the Motor/Gen/Xfmr Protection category by clicking on the "+" symbol. Select the Motor Over Load category.