Cable sizing is done based on three parameters: Load current, Short circuit current carrying capacity, Voltage drop. Below are given simple steps for performing cable sizing calculations. Step 1 – Calculate Load Current: Calculate the load current from the load data available. Formula is: I=Load (in kW)/(sqrt(3)V(in kV)p.f) (A) The current obtained has to derated… Read More: Cable Sizing & Voltage Drop Calculations Formula »
Overview Horizontal cable is installed between the telecommunications closet and the work area outlets for workstations. It supports many different kinds of information for its users: Voice communications Data communications Other building information systems (such as CATV, IPCCTV) Pulling horizontal cabling is one of the most important jobs of a successful installation. Because the cable… Read More: Procedure for Pulling Horizontal Data & Voice Cables in Conduits… »
The apparatus used for switching , controlling & protecting the electrical circuits & equipment is known as switchgear. The switchgear equipment is essentially used with switching & interrupting currents either under normal or abnormal operating conditions. A switchgear consists of devices such as switches , fuses , circuit breakers , relays etc. Basically every electric… Read More: How To Install Low Voltage Switchgear Panels »
As a standard practice installer or contractor shall arrange for the witnessing of the following tests on the fully equipped switchboards (main, submain distribution boards and Motor Control Centers MCC) including primary bus bars and connections at the factory, in accordance with IEC 439-1: High voltage power frequency tests on main and auxiliary circuits Dielectric/insulation… Read More: Standard Checks & Tests for MDB, SMDB, DB & Motor… »
Siemens Fixed-Mounted Circuit-Breaker Switchgear Type NXPLUS C Wind up to 36 kV, Gas-Insulated. Environmental independence Hermetically tight, welded switchgear vessels made of stainless steel as well as single-pole solid insulation make the parts of the primary circuit under high voltage of NXPLUS C Wind switchgear Insensitive to certain aggressive ambient conditions, such as: – Saline air… Read More: Medium-Voltage Switchgear Type NXPLUS C Wind Features & Requirements »