Quick Answer: LV commissioning should confirm electrical continuity, protection behavior, mechanical operation, and safe load energization. This guide is written for engineers, EPC teams, and procurement managers who need clear equipment decisions, RFQ details, and. This article continues the series of articles dedicated to the erection, testing and commissioning of MV/HV switchgear by describing the most important precautions and recommendations in various procedures and steps. Starting from the wiring of low voltage command and signal cables, filling CBs. ion to the distribution bar system is done directly via the contact devices of the withdrawable modules. Outgoing cables are connected via plug-in-c ntacts to the outgoing cable connection unit (main circuit) and via terSenior Electrical Engineer, with 12 years of experience in high and low voltage switchgear installation, commissioning, and overseas project technical support. Currently, Thor is the Technical Department Manager at Weisho Electric Co. The modular design saves space, while quick assembly contacts ensure fast mounting. multitude of additional information. What Does IEC 61439 Require for Low Voltage Switchgear Design? IEC 61439.