UPS Battery back time calculation Example ⤵️ * A 6KVA , 230V UPS with 144DC link power and 0.9 PF. * Battery bank - 500 AH capacity , 12V nominal range 10.6V - 13.4V. * Key factors - Inverter efficiency ( 95%), derating factor ( 0.5 for 8 hour discharge) Critical steps for backup time calculation. Step 1 ➡️ Battery power demand Formula - UPS power x ( power factor / inverter efficiency ) Calculation - 6 x ( 0.9 x 0.95) = 5.684 KW. Step 2 ➡️ Worst case voltage adjustment. Minimum battery voltage - 10.6V per cell. Total system voltage - 144V X ( 10.6V /12V ) = 126.72 V. Step 3 ➡️ Discharge current Formula - Battery power/Total voltage. Calculation - 5.684KW / 127.2 = 44.69A . Step 4 ▶️ Backup Time Derated capacity - 500AH x 0.5 = 250AH . Backup time - 250AH / 44.69 A = 5 hours ( Average )

⚡ Understanding VFDs: How They Actually Work A Variable Frequency Drive (VFD) precisely controls the speed of an AC motor by converting fixed-frequency power into variable-frequency output. But what’s happening inside the box? 🔌 1. Rectifier Incoming AC power (typically 480V or 208V) first passes through a rectifier, which converts it to DC voltage. This is usually done with a 6-pulse or 12-pulse diode bridge, depending on how clean the input waveform needs to be. 🔋 2. DC Bus The DC bus (or DC link) smooths out the rectified voltage using capacitors and sometimes inductors. This section stores and stabilizes energy, filtering voltage ripple before it’s sent to the inverter. It’s like the energy “reservoir” that keeps everything steady during load changes. 🔁 3. Inverter Finally, the inverter section converts DC back into AC—but now it’s controlled. Using high-speed IGBTs (Insulated-Gate Bipolar Transistors), the inverter rapidly switches the DC voltage on and off to create a simulated AC sine wave at whatever frequency (and voltage) the motor requires. 🎯 Result: By varying the output frequency and voltage, the VFD controls motor speed and torque—improving energy efficiency, reducing mechanical stress, and enabling soft starts, variable control, and regenerative braking. #StayEmpowered #ElectricalEngineering #VariableFrequencyDrive #MotorControl

With the wiring complete, it's time to power everything on in the correct order. First, flip the main power switch to on. Next, press and hold the small orange button for about one second until the status light turns on. Finally, switch on the DC breaker on the right side to energize the output cable to the inverter. The battery is now live and ready to be turned on via the battery breaker. #ElectricalWiring #PowerOnSequence #InverterSetup #BatteryPower #Pytes

"Understanding transformer and motor power ratings: ⚡ kVA (kilovolt-ampere) represents apparent power supplied by the transformer. ⚡ kW (kilowatt) represents real power consumed by the motor. ⚡ The relationship is: kW = kVA \times Power\ Factor (pf) This helps in selecting the right transformer capacity to match motor power requirements efficiently."

Some reasons for UPS failures during power outage 1-one time when grid power supply failed one of the UPS failed After investigation and power supply failure similulation for that UPS it was discovered that one control fuse was belown which feeds the control power supply to the UPS, that fuse taken the power from battery which is the hart of the UPS during the power outage 2- If you are not doing the battery load test annually you may get UPS failure in case of the weak battery and generator failed to start 3- in case of the battery type is sealed and not replaced in time you may get one battery cell open. Accordingly, when power failure occurs the UPS will failed

1,200V Low-Loss Diodes Offered in Three Package Sizes Learn more| https://twsemi.co/1200vlow TSC’s 1200V Low Loss Diodes are engineered for superior performance in high-current and elevated-temperature environments — delivering efficiency and reliability for high-density applications and server power supplies. 1️⃣ Ultra-efficient design minimizes DC conduction losses to achieve greater power efficiency. 2️⃣ Wide operating range (15A–60A) and TJ(max) of 175°C ensure stable and reliable performance under demanding conditions. 3️⃣ Flexible packaging options — ThinDPAK, D2PAK-D, and TO-247BD — simplify thermal management and layout optimization. Ideal for next-generation EV chargers, three-phase AC/DC converters, totem-pole bridgeless topologies, and data-telecom power systems. #TSC #PowerManagement #PowerDiodes

𝗚𝗿𝗶𝗱 𝗜𝗻𝘁𝗲𝗿𝗰𝗼𝗻𝗻𝗲𝗰𝘁𝗶𝗼𝗻 𝗦𝗲𝗿𝗶𝗲𝘀 #𝟯 𝗛𝗼𝘄 𝗗𝗼𝗲𝘀 𝗮 𝗕𝗘𝗦𝗦 𝗦𝘂𝗽𝗽𝗼𝗿𝘁 𝗥𝗲𝗮𝗰𝘁𝗶𝘃𝗲 𝗣𝗼𝘄𝗲𝗿 𝗪𝗵𝗲𝗻 𝗜𝘁’𝘀 𝗜𝗱𝗹𝗲? A few days ago, one of my friend asked me a nice question,   “If the BESS is idle - not charging or discharging - how can it still provide reactive power?” At first, it sounds confusing — if no real power is moving, how can reactive current even flow? Here is the logic in simple terms,  • Even when idle, the inverter stays energized and synchronized with the grid. Using its PWM control, it adjusts its internal voltage phase slightly.  • When inverter voltage leads the grid → it supplies capacitive reactive current (+Q)  • When it lags → it absorbs inductive reactive current (–Q)  • This creates a small circulating current that flows back and forth between the grid and the inverter’s AC filters each half-cycle.  • The DC link capacitor just smooths these oscillations, it is not the main source of energy.  • A small DC support current from the battery (or grid) keeps the DC voltage constant, allowing the inverter to behave like an electronic STATCOM. Thats how a BESS supports grid voltage continuously even when there is no P. Have you modeled this circulating reactive current or tested it in simulations? Would love to hear your observations. #powersystems #gridinterconnection #gridstudies #powersystemanalysis #transmissionanddistribution #bess #energystorage #batteryenergystorage #renewableenergy

When reactive power devices, whether capacitive or inductive, are purposefully added to a power network in order to produce a specific outcome, this is referred to as compensation. It’s as simple as that. This could involve greater transmission capacity, enhanced stability performance, and enhanced voltage profiles as well as improved power factor. The reactive devices can be connected either in series or in parallel (shunt). Before we get into the depth of describing the compensation applications and other details, let’s remind ourselves of the power flow basics. https://lnkd.in/dhDHHiN7

⚡ Voltage Source Inverter (VSI) for Industrial Motor Control ⚙️ In high-capacity industrial systems, starting large induction motors directly from the line can cause high inrush current and mechanical stress. To overcome this, a Voltage Source Inverter (VSI) is often used to provide a smooth and controlled start. A VSI drive converts DC power into variable-frequency AC, gradually increasing voltage and frequency to ensure: ✅ Smooth motor acceleration ✅ Reduced electrical and mechanical stress ✅ Better energy efficiency ✅ Precise speed and torque control Using IGBT-based PWM switching, VSI drives deliver stable performance and reliability even under heavy load conditions. 💡 The use of VSI technology has significantly improved motor control efficiency, making industrial operations more stable, energy-efficient, and reliable.

Q: What technical standards must the voltage withstand performance of YMIN film capacitors adapted to high-power DC charging piles meet? A: YMIN film capacitors for high-power DC charging piles need to withstand a DC voltage of over 600V, and high-power models require a voltage withstand capacity of over 1200V. This ensures no breakdown risk under high-voltage operating conditions and maintains circuit stability. https://lnkd.in/gNeeSJQ9 #VoltageWithstandStandard #DCChargingPile #HighPowerCapacitor #CapacitorwithVoltageOver600V