Hossein Karimi’s Post

The most common voltage sources for power system measurements and protections are either wound transformers (voltage transformers) or capacitive divider devices (capacitor voltage transformers or bushing potential devices). Some new applications of resistor dividers and magneto-optic technologies are also becoming available. All provide scaled replicas of their high-voltage potential. They are characterized by their ratio, load capability, and phase-angle response. Wound potential transformers (PTs) provide the best performance with ratio and phase-angle errors suitable for revenue measurements. This technical article will explain all important aspects of voltage transformers in MV and HV measurement and protection applications. Read more https://lnkd.in/gfzgpVP

The most common voltage sources for power system measurements and protections are either wound transformers (voltage transformers) or capacitive divider devices (capacitor voltage transformers or bushing potential devices). Some new applications of resistor dividers and magneto-optic technologies are also becoming available. All provide scaled replicas of their high-voltage potential. They are characterized by their ratio, load capability, and phase-angle response. Wound potential transformers (PTs) provide the best performance with ratio and phase-angle errors suitable for revenue measurements. This technical article will explain all important aspects of voltage transformers in MV and HV measurement and protection applications. Read more https://lnkd.in/g6cmGeh

🔹 Transformer Sizing — Simplified Notes 🔹 I recently made these notes to better understand how to select the right transformer size for a system. It covers the key factors like: ⚙️ Primary and secondary voltages 📊 Load types (continuous, intermittent, standby, and dead loads) ⚡ kVA calculation with power factor and diversity 🔍 Adding margins for future expansion, losses, and safety 🧮 Adequacy checks for motor starting and voltage drop A properly sized transformer ensures efficiency, reliability, and future readiness of the electrical system. Sharing my notes here to help anyone learning or revising the concept. Would love to hear how others approach transformer sizing in their projects. #ElectricalEngineering #TransformerSizing #PowerSystem #ElectricalDesign #EngineeringLearning #Transformer #ElectricalEngineer

Critical Step: Precision Installation of High-Voltage Links on Dry-Type Transformers In the world of electrical infrastructure, reliability is non-negotiable. Here is our team installing the HV (High-Voltage) connecting links on a dry-type transformer. This seemingly simple task is one of the most critical steps in the entire process. Why this precision matters: * Fault Prevention: Ensuring a tight, secure connection between the HV winding and the terminal ends prevents overheating and potential equipment failure. * Efficiency: A reliable link minimizes energy loss, contributing to the transformer's overall high performance. * Longevity: Correct torquing and alignment guarantee the structural and electrical integrity for decades of service. We pride ourselves on the meticulous attention to detail at every stage of production and installation. Safety and quality are our top priorities. 📧 Email: chbebgroup@chbebpower.com 📱 WhatsApp/WeChat: +86 13057780111 +86 15558785111 🌐 Website: www.chbeb-ele.com #DryTypeTransformer #HighVoltage #ElectricalEngineering #PowerDistribution #Installation #Reliability #TransformerInstallation #ElectricalSafety #CHBEBPower #Infrastructure #Switchgear #PrecisionEngineering #EnergySolutions

⚡ Understanding Impedance in Transformers Impedance in transformers is primarily determined by the resistance and reactance of the windings. A higher impedance generally leads to a larger transformer size. This happens because: More winding turns are required to achieve the desired voltage transformation. Increased copper usage results in higher copper losses. A larger core size is needed to handle the added magnetic flux. Greater insulation may be required to manage voltage stress. In short, transformer impedance directly affects its design, efficiency, and physical dimensions — higher impedance usually means a bulkier transformer. #TransformerDesign #ElectricalEngineering #PowerSystems #Impedance #TransformerTheory #EngineeringEducation #Electromagnetics #ElectricalMachines #PowerDistribution #EnergyEngineering #HVAC #GridTechnology #PowerGeneration #IndustrialEngineering #TransformerTesting #ElectricalDesign #ElectricalPower #EngineeringCommunity #RenewableEnergy #SmartGrid #TransformerEfficiency #TechnicalLearning #ElectricalInsights #ElectronicsAndPower #EngineeringWorld #TransmissionAndDistribution #EngineeringConcepts #ElectricalTechnology #EnergySystems #LearnEngineering #EngineeringInnovation #PowerEngineering

⚡Real Power vs Reactive Power⚙️ In AC systems, total power isn't always productive. It splits into three key components: 🔵Real Power (P - kW): Actual useful power performing mechanical work, heating, or lighting. P = V x 1 x cos(θ) 🔵Reactive Power (Q - KVAR): Non-working power that sustains magnetic and electric fields in inductive or capacitive loads. Q = V x 1 x sin(θ) 🔵Apparent Power (S - KVA): The vector sum of P and Q. S = √(P2 + Q²) The Power Factor (coso) defines how effectively electrical energy converts into useful work. Improving PF reduces system losses, enhances voltage stability, and optimizes capacity utilization. Don't just manage kW - Control KVAR💪 #PowerEngineering #ElectricalDesign #EnergyEfficiency #ReactivePower #PowerFactor #ElectricalSystems #IndustrialEngineering

“Before current flows, engineers draw the path — on this paper.” ⚡ From 11 kV to 440 V — The Power Journey Simplified! Every large industry relies on one silent hero — the Single Line Diagram (SLD). It may look like just a few lines and symbols, but behind it lies the entire story of how power flows safely and efficiently across the plant. An 11 kV / 440 V SLD represents the lifeline of electrical distribution — 🔹 11 kV incoming supply from the utility 🔹 Step-down through the power transformer 🔹 440 V distribution for motors, lighting, and control systems 🔹 Protective devices ensuring safety and continuity A well-designed SLD helps engineers visualize the complete system at a glance — identifying isolation points, load paths, and protection zones. Every component in this Single Line Diagram (SLD) is a checkpoint — a guardian of safety, reliability, and continuity. Most people see wires, we see a map of power flow, risk zones, and smart switches. If you’re an electrical engineer or just curious — this is where design meets real life. In the world of power, clarity saves time, and safety saves lives. Proud to be an engineer who works behind these lines that keep industries running 24×7 💡 What’s your most critical component in this chain — transformer, circuit breaker, CT/relay? Comment below 👇 #ElectricalEngineering #PowerDistribution #IndustrialSafety #EngineeringDesign #SteelIndustry #Automation #Transformer #Substation #EngineeringLife

👉 Understanding Power Factor Beyond the Basics 👈 👷 Most professionals describe Power Factor (PF) as the ratio of real power to apparent power — but that definition barely scratches the surface. In practice, PF represents the phase alignment between voltage and current in an AC system. When current lags or leads the voltage due to inductive or capacitive loads, part of the current no longer contributes to real work. This “wasted” component is known as reactive current, which increases system losses without producing useful output. A lagging PF (caused by motors, transformers, welding machines, etc.) forces your electrical infrastructure — cables, switchgear, transformers — to handle higher RMS currents, even when the actual useful power (kW) remains constant. This not only increases I²R losses, but also reduces available system capacity. At the grid level, poor PF affects voltage regulation and reactive power balance, compelling utilities to deploy additional VAR compensation. That’s why PF correction is not just a plant-level improvement — it’s part of maintaining grid stability and sustainability. 💡 In upcoming posts, we’ll dive deeper into the quantitative effects of PF on system performance, energy costs, and harmonics. Hashtags: #PowerFactor #PowerQuality #ElectricalEngineering #EnergyEfficiency #ActivesineElectricals

Post #200BDA0BE Understanding Transformer Connections: Why It Matters Transformers are at the heart of power systems—but it’s not just about size or turns ratio. The configuration of the windings (Star vs Delta) determines how well a transformer will perform in real-life. I recently came across an excellent breakdown of the four major connection types: Y-Y (Star-Star): Economical, neutral available, but weak when loads are unbalanced or harmonics dominate Δ-Δ (Delta-Delta): Robust under heavy currents and unbalanced loads; no neutral point though Y-Δ (Star-Delta): Ideal for stepping down high to lower voltage; offers insulation savings and neutral grounding Δ-Y (Delta-Star): The go-to for distribution systems—stable neutral, reduced insulation stress, handles 3-phase + single-phase loads The correct choice influences: ✔ Phase displacement ✔ Neutral availability ✔ Insulation stress ✔ Ability to handle harmonics and unbalanced loads Whether you’re specifying transformers for a utilities project, or managing distribution systems in industry, this is not a “set-and-forget” decision. Choosing the wrong winding connection could mean higher costs, poorer reliability, more downtime. If you’re working in power systems (design, operations, maintenance) this is definitely worth a quick read. #PowerSystems #TransformerDesign #ElectricalEngineering #Distribution #IndustrialPower