Recent Articles
Inverse-Time Overcurrent Trip Test (MCCB)
Purpose •Verify the long-time protection function. •This confirms the breaker trips according to its inverse time curve. How it works Connect two poles *in series* with copper conductors not less than 4 ft (1.2 m) in length Check Trip Unit Dial ...
Primary Injection Test
Primary Injection Test Primary Injection Test is a comprehensive electrical testing method used to verify protection chain of a power system by injecting a high current directly into the primary side(the main power-carrying conductors) What Does It ...
ACB ERMS Activation
For ERMS, units are shipped with the default setting as “No Trip.” Therefore, when using P-type or S-type STU, the OP Mode must be changed to “Trip” on the STU screen. For A-type, the OP Mode must be changed to “Trip” using the software in order for ...
MCCB Bus Bar Connections (UTS800 & UTS1200)
MCCB Busbar Connection Options (UTS800 / UTS1200) LS Electric MCCBs are designed with flexible busbar connection options to support a wide range of panel configurations and installation requirements. For UTS800 and UTS1200 breakers, busbar ...
LIS enclosed Switches Door Hinge and Handle Replacement Guide
There are four door hinges installed on one switch. If the door does not fit the frame properly or does not close correctly, it usually means that at least two or more hinges are bent or damaged. In this case, I recommend replacing all hinges to ...