Jerry Daugherty, EE PE’s Post

A insight into how we make off a 630mm Aluminium Wired Armourded into a 11KV to 415V Transformer (TX) 🤟🏽

A Good Engineering Practice with Best suitable tool kit.

I had posted a couple days ago asking for information on the temperature coefficient of capacitance of modern fuseless film capacitors. Here is the vendor information, suitably sanitized. For this manufacturer and specific dielectric fluid, the coefficient is around 0.033%/deg C, so a 1% change for a 30C temperature swing. Does it matter? Mostly no, but there may be applications (highly tuned filters) where this behaviour has to be accomodated. I remember back in the early part of the 2000s, we had a filter tuning monitor attached to our HVDC filters that was so sensitive, we could see the tuning of the filter shift as the sun shone on the bank, and we could also see the very small voltage coefficient of capacitance of those very old (1960s vintage) capacitor cans.

Description Features Talk by connecting with fiber High quality Full duplex communication Light source capabilities Wide dynamic range: 45 dB Large dynamic distance: >74.56 mi (120 km) Long or short mode for different distance Power autonomy of 70 hrs   Technical Specifications Wavelength1310 nm,1550 nmOperating StyleFull duplex communicationOutput Power>-5 dBmFiber TypeSMDynamic RangeSM fiber: 45 dBDynamic DistanceSM fiber: >74.56 mi (120 km)Connecting AdapterFC or PCBattery ChargeOptionalOperate TimeAbove 12 hrsPower Supply2 x AA batteries or AC or DC adapterStorage Temperature-4 °F to 140 °F (-20 °C to 60 °C), <90% RHOperating Temperature14 °F to 122 °F (-10 °C to 50 °C), <90 % RHSize6.69 in x 3.82 in x 1.50 in (170 mm x 97 mm x 38 mm)Weight0.838 lb (380 g)

With half the standard 0.100" pitch size, the 3M 451 and 452 Series utilize insulation displacement contact technology (IDC) to deliver high connection density to ribbon cable applications. Learn more: https://bit.ly/4h6PWRs

With half the standard 0.100" pitch size, the 3M 451 and 452 Series utilize insulation displacement contact technology (IDC) to deliver high connection density to ribbon cable applications. Learn more: https://bit.ly/4h6PWRs

With half the standard 0.100" pitch size, the 3M 451 and 452 Series utilize insulation displacement contact technology (IDC) to deliver high connection density to ribbon cable applications. Learn more: https://bit.ly/4h6PWRs

Today we will start a series of posts about Circuit breakers. as we all know Its basic function is to interrupt current flow to protect equipment and to prevent fire. we can divide CBs into three categories 1- fixed thermal magnetic breaker or ' non adjustable trip unit' 2- Adjustable thermal magnetic trip unit 3- electronic trip unit today we will go deeply with the first category which known as miniature circuit breaker from this video we should have known the two tripping methods the miniature can do. - electromagnetic which trips the breaker instantaneously - thermal depending on the material of the bi-metal strip which designed according to thr MCB rating. first see the video and to complete with the next article about MCB curves

35KV 2000A wall bushing will be finished.the Tangent of dielectric loss is less than 0.35~0.49% Partial dischange less than 7~9 pc #wall_bushing #composite_insulator

Nominal voltage: 36V/48V Nominal capacity: 12Ah/10Ah Rated power: 432Wh/480aWh Weight: 4.5KG Protection level: IP65 Charging voltage: 42V/54.6V Discharge voltage: 28V/37.5V Max. charging current: 5A Max. discharge current: 20A Change temperature: 0-45℃ Discharge temperature: 20-60℃ Material system: ternary lithium Cycle time: ≥500 times