Electrical protection devices are critical for ensuring the safety and reliability of industrial control systems. With so many types of devices available, it can be challenging to know which ones to choose. Here are some factors to consider: What Types of Electrical Faults Can Occur? Different protection devices are designed to detect and mitigate different types of faults. Overcurrent protection devices, such as fuses and circuit breakers, protect against overloads and short circuits. Ground fault protection devices, such as GFCIs, protect against ground faults, which occur when electrical current flows…
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How to calculate Generator Sizing?
Calculation for Generator sizing Procedure The generator sizing is done based on the following conditions. a) Load Calculate from continuous. b) 10 % spare capacity for future loads. A) Calculation of total load: Total connected load as per load summary given below. (Refer to generator sizing-load-summary details ) Continuous Load Total KW 237.22 Total KVAR 0.00 Total KVA 279.08 Minimum KW =237.22 KW Maximum KVA =279.08 B) Calculation for Generator Capacity Generator Capacity (In KVA) =Maximum Load X 1.1 = 306.99 KVA (Considering 10% spare capacity for future loads) So we select…
Read MoreHow to select a transformer sizing or rating for commercial and industrial ?
Calculate Transformer sizing and Voltage drop with regulation at starting of large size motor Procedure:- The transformer sizing is done base on the following condition. a) peak load calculated from continuous ,intermittent & standby. b) 10% spare capacity for future loads. c) Load requirement with highest rated Motor started on DOL. 1:-Calculation of total peak load Total connected load as per transformer-sizing-load-summary given below Continuous load (E) Intermittent load (F) Stand by load (G) Total KW 222.74 Total kVR 138.04 Total KVA 262.05 Total KW 1871.61 Total KVAR 1159.92 Total…
Read MoreHow to calculate electrical fault or Short circuit current?
Short circuit current calculation. Purpose It plays a very important role to protect & also safety of commercial and industrial electrical equipment like circuit breakers,transformers …etc. What is short circuit current? When two or more conductors are different phases come in contact with each other in a line, transformer or any other power element, then the part of the impedance is shunted out of the circuit due to which a large current flow in the un-faulted phases, such current is called the short circuit current. It reduces the effect of impedance in…
Read MoreHow to choose high voltage cable size?
Calculation of nominal cross sectional area of the high voltage cable High voltage cable The cross sectional area of high voltage cable where calculated shall not be less the value determined by following formula:- S = (I SC *√t ) / K Where, S= Nominal cross sectional area of the conductor in mm2 I SC = Value of fault current or short circuit current in KA T=Fault clearing…
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