Jignesh Parmar
74 awesome technical articles
Electrical Middle management professional having more than 22 years rich and dynamic experience in Project Execution / Project Management / Designing / Maintenance diversifies from Electrical Power Transmission (400KV/220KV/66KV)- Distribution(11KV/220V) to Lifts-HVAC-Ventilation-Fire Fighting-Fire Alarm-Lifts-CCTV-Stack Parking Works (High Rise Buildings, Townships, Shopping Complex, Commercial Complex, School, Temple).
Biography: https://electrical-engineering-portal.com/jignesh-parmar
High Voltage
Electrical Safety Standards for LV/MV/HV (Part-2)
Continued from part 1 – Electrical Safety Standards for LV/MV/HV (Part-1) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Clearances of Electrical Line to Ground and Roads Clearances of Electrical Line to Other Objects Clearances of Electrical Line to Trees and… Read more
Nov 12, 2012 | By Jignesh Parmar
High Voltage
Electrical Safety Standards for LV/MV/HV (Part-1)
Standard: Western Power Company Water Safely Clearance on Electrical Fires Minimum Approach Distance for Authorized Person Minimum Approach Distance for Ordinary Person Minimum Approach Distance for Vehicle and Plant for Ordinary Person . Standard: New Zealand Electrical Code Min. Safe… Read more
Nov 07, 2012 | By Jignesh Parmar
Energy and Power
Safety Clearance Recommendations for Transformer
Clearance from Outdoor Liquid Insulated Transformers to Buildings (NEC) Clearance between Two Outdoor Liquid Insulated Transformers (NEC) Dry Type Transformer in Indoor Installation (NES 420.21) Dry Type Transformer in Outdoor Installation (NES 420.22) Non Flammable Liquid-Insulated Transformer in Indoor Installation… Read more
Oct 24, 2012 | By Jignesh Parmar
Energy and Power
Safety Clearance Recommendations for Electrical Panel
Working Space around Indoor Panel/Circuit Board (NES 312.2) Clearance around an Indoor electrical panel (NEC 110.26) Clearance for Conductor Entering in Panel (NES 408.5) Clearance between Bare Metal Busbar in Panel (NES 408.5) Clearance of Outdoor electrical panel to Fence/Wall… Read more
Oct 10, 2012 | By Jignesh Parmar
Protection
Overcurrent protection of transformer (NEC 450.3)
The overcurrent protection required for transformers is consider for Protection of Transformer only. Such overcurrent protection will not necessarily protect the primary or secondary conductors or equipment connected on the secondary side of the transformer. Introduction Overcurrent protection of transformers… Read more
Oct 08, 2012 | By Jignesh Parmar
Energy and Power
What is the difference between Bonding, Grounding and Earthing?
One of the most misunderstood and confused concept is difference between Bonding, Grounding and Earthing. Bonding is more clear word compare to Grounding and Earthing, but there is a micro difference between Grounding and Earthing. Earthing and Grounding are actually… Read more
Sep 27, 2012 | By Jignesh Parmar
Transmission and Distribution
Qatar General Electricity and Water Corporation – Recommendations for Safety Clearance
Service Vertical Clearance (Min) Water Line (to cross below EHV cable level) 0.5 Meter Sewerage Mains (to cross below EHV cable level) 1.0 Meter Drainage Mains (to cross below EHV cable level) 0.5 Meter Gas pipes 0.6 Meter Telephone lines… Read more
Sep 15, 2012 | By Jignesh Parmar
Energy and Power
What is a Floating Neutral and how does it affect the power distribution
If the Neutral Conductor is opened, broke or lost at either of its source side (distribution transformer, generator) or at load side (distribution panel of a consumer), the distribution system’s neutral conductor will “float” or lose its reference ground Point…. Read more
Aug 27, 2012 | By Jignesh Parmar
Energy and Power
Principles of Transformers in Parallel Connection (part 2)
In ideal parallel operating of power transformers, the current in each transformer is directly proportional to its capacity, and the arithmetic sum equals one-half of the total current. This is rarely accomplished because to minor discrepancies in transformers. Nonetheless, some… Read more
Aug 08, 2012 | By Jignesh Parmar
Energy and Power
Principles of Transformers in Parallel Connection
For supplying a load in excess of the rating of an existing transformer, two or more transformers may be connected in parallel with the existing transformer. The transformers are connected in parallel when load on one of the transformers is… Read more
Aug 06, 2012 | By Jignesh Parmar
Energy and Power
Delta-Star Transformer Connection Overview
The Delta-Star transformer connection is utilized to increase voltage levels and is frequently applied at the end or beginning of high-tension power transmission systems. The primary is configured in a delta arrangement, while the secondary is arranged in a star… Read more
Jul 10, 2012 | By Jignesh Parmar
Energy and Power
Delta-Delta Transformer Connection Overview
In this type of connection, both the three phase primary and secondary windings are connected in delta as shown in the Figure 1: The voltages on primary and secondary sides can be shown on the phasor diagram (Figure 2): This… Read more
Jul 06, 2012 | By Jignesh Parmar
Energy and Power
Autotransformer Connection Explained
An ordinary transformer consists of two windings called primary winding and secondary winding. These two windings are magnetically coupled and electrically isolated. But the transformer in which a part of windings is common to both primary and secondary is called… Read more
Jul 02, 2012 | By Jignesh Parmar
Transformers
ZigZag Transformer Connection Overview
The zigzag connection of tranformer is also called the interconnected star connection. This connection has some of the features of the Y and the ∆ connections, combining the advantages of both. The zigzag transformer contains six coils on three cores…. Read more
Jun 15, 2012 | By Jignesh Parmar
Transformers
Scott-T Transformer Connection Overview
There are two main reasons for the need to transform from three phases to two phases: to give a supply to an existing two phase system from a three phase supply and to supply two phase furnace transformers from a… Read more
Jun 12, 2012 | By Jignesh Parmar
