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Switchgear Testing #electrical #electricalengineering #electricalengineer

It is essential that the electrical engineers, or operators who will be in charge of switching, isolating, and earthing operations of the switchgear have a good understanding of the rules that must be followed. In addition, it is of the utmost need to guarantee that the operator and the substation are both safe during the execution of these tasks. The most effective way for accomplishing this is through meticulous planning, as well as the documentation of both the procedures and the safety precautions undertaken. However, this isn’t always the case, as engineers or individuals unfamiliar with the procedures often perform operations like switching, disconnecting, isolating, or earthing. Inexperienced engineers and technicians can also make critical mistakes while operating in a power substation.

It is essential that the electrical engineers, or operators who will be in charge of switching, isolating, and earthing operations of the switchgear have a good understanding of the rules that must be followed. In addition, it is of the utmost need to guarantee that the operator and the substation are both safe during the execution of these tasks. The most effective way for accomplishing this is through meticulous planning, as well as the documentation of both the procedures and the safety precautions undertaken. However, this isn’t always the case, as engineers or individuals unfamiliar with the procedures often perform operations like switching, disconnecting, isolating, or earthing. Inexperienced engineers and technicians can also make critical mistakes while operating in a power substation. Let’s dive now into the rules!

It is essential that the electrical engineers, or operators who will be in charge of switching, isolating, and earthing operations of the switchgear have a good understanding of the rules that must be followed. In addition, it is of the utmost need to guarantee that the operator and the substation are both safe during the execution of these tasks. The most effective way for accomplishing this is through meticulous planning, as well as the documentation of both the procedures and the safety precautions undertaken. However, this isn’t always the case, as engineers or individuals unfamiliar with the procedures often perform operations like switching, disconnecting, isolating, or earthing. Inexperienced engineers and technicians can also make critical mistakes while operating in a power substation. Read more https://lnkd.in/d2wG9vjz

Chapter 1: Electrical Switchgear Definition: What is Electrical Switchgear? What is Electrical Switchgear? For those who do not know, electrical switchgear is a broad term. It is a generic term that is composed of a series of switching devices. These are utilized to: meter regulate and; control your power system Perhaps you had seen switchgear before, even if you did not realize it. Some of the examples of the switchgear devices include: control panels lightning arresters indicating instrument potential and current transformer relays isolator circuit breaker fuses and; switches You see, The switchgear system is directly connected to the supply system. It is located in both the low voltage and high voltage side of the power transformer. It is utilized for de-energizing the equipment for: maintenance testing and for clearing the fault   What Does Electrical Switchgear Mean It is composed of the combination of those switching devices along with associated: regulating measuring control and; protecting of equipment The switchgear devices, as well as their assemblies, are utilized in the: generation transmission conversion and distribution of electrical energy Chapter1: Electrical Switchgear Working Principle：How Does Electrical Switchgear Work? When the fault takes place in the power system, heavy current flow through equipment. That caused the equipment to get damaged. You see; The equipment also gets interrupted. Therefore, To safeguard the lines, transformers and generators form any damage, switchgear devices are needed.   The automatic protective switchgear is composed of the circuit breaker and relay. When the fault happens in any part of the system, the relay of that pat comes into operation. It closes the trip circuit of the break that disconnects the faulty region. The healthy section remains supplying loads. Therefore, There’s no damage to equipment and no interruption of supply.

It is essential that the electrical engineers, or operators who will be in charge of switching, isolating, and earthing operations of the switchgear have a good understanding of the rules that must be followed. In addition, it is of the utmost need to guarantee that the operator and the substation are both safe during the execution of these tasks. The most effective way for accomplishing this is through meticulous planning, as well as the documentation of both the procedures and the safety precautions undertaken. However, this isn’t always the case, as engineers or individuals unfamiliar with the procedures often perform operations like switching, disconnecting, isolating, or earthing. Inexperienced engineers and technicians can also make critical mistakes while operating in a power substation. Let’s dive now into the rules!

Electrical License Test: Key Questions and Answers #electrical #electrical #questionsandanswers https://lnkd.in/gHzw84n5

Electrical Equipment Selection Guidelines #Part_01 1. Power Cable Selection Voltage Drop: Maintain ≤ 3% for feeders. ≤ 5% for branch circuits. Note: This is in line with BS 7671:2020 and IEC 60364 guidelines for voltage drop in final circuits (≤ 5%) and for feeders (≤ 3%). Current Carrying Capacity: Cable should support 1.25–1.5 times the full load current. Note: This is consistent with both BS 7671 and IEC 60364 which consider a safety margin for temporary overload conditions. Cable Size: For 3-phase: 1.5–2.5 mm² per kW. For 1-phase: 1.0–2.0 mm² per kW. Note: BS 7671 does not specify this exact ratio but recommends cable sizing based on load current, environmental conditions, and safety factors. The provided values are reasonable but should be verified against specific load and environmental factors. Cable Insulation Level: 600V/1000V for Low Tension (LT) systems. Note: These insulation levels align with BS 7671, IEC 60038, and common industry standards for LT and HT systems. 2. Earthing Cable Selection Earth Fault Current: Design for 10–20 times the full load current. Note: This is in line with BS 7671 and IEC 60364, which consider high fault current ratings for safety. Earthing Cable Size: Select 50–70% of the phase conductor size. Note: While this is a common guideline, BS 7671 recommends ensuring the earthing conductor is capable of carrying the fault current safely. The actual size may vary based on fault current, installation conditions, and other factors. Earth Resistance: ≤ 1 Ω for LT systems. ≤ 5 Ω for HT systems. Note: These values align with BS 7671 and IEC 60364 for maximum acceptable earth resistance. 3. Motor Selection Motor Capacity: Rated power should be 1.25–1.5 times the load kW. Note: BS 7671 and IEC 60364 do not specifically recommend this multiplier, but it’s a common practice to ensure motors can handle short-term overloads and ensure longevity. Efficiency: ≥ 90% for IE2 motors. ≥ 95% for IE3 motors. Note: These values are consistent with the IEC 60034 efficiency standards for motors (IE2 and IE3). Power Factor: Maintain ≥ 0.8 for induction motors. Note: This is consistent with BS 7671 and general motor efficiency requirements. Starting Current: Typically 6–8 times the full load current. Note: This is typical for motor starting characteristics and aligns with BS 7671 and IEC 60034. 4. Generator Selection Generator Capacity: Rated power should be 1.25–1.5 times the load kVA/kW. Note: This guideline is consistent with the BS 7671 and IEC 60034 standards for selecting generators based on peak load considerations. Efficiency: Maintain ≥ 90%. Note: This is aligned with typical BS 7671 efficiency expectations for power generation equipment. Power Factor: Maintain ≥ 0.8. Note: This is in line with standard practices for generators as per BS 7671.

Electrical Equipment Selection

Top MCCB Manufacturers: Ensuring Safety and Reliability of Electrical Systems: In the field of electrical engineering, the safety and reliability of electrical systems are of paramount importance. Molded case circuit breaker (MCCB) is one of the important components that plays an important role in ensuring the safety of electrical installations. … Continue reading → #ManufacturingIndustry #MarketingSales #US #WebsiteBlog #World