Prefabricated Substation for Wind Power
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Prefabricated Substation for Wind Power
I. It is suitable for power transformation control for 1500kW wind driven generator from 690V up to35kV.
II. Normal Service Condition
1. Altitude: lessthan 1000m.
2. Operation environmentaltemperature: more than -40℃, and less than +40℃.
3. Relative airhumidity of operation environment is not higher than 90% (equal to airtemperature of +20℃).
4. Horizontal accelerationof earthquake is not more than 0.4m/s2,and the vertical acceleration is not more than 0.2 m/s2.
5. Verticalinclination angel of installation base is not more than 5°, and there is no severe vibration and impact.
6. Installation sitewith good ventilation without explosion, correction, gas and dust which candestroy insulation.
7. Constant waveof voltage is not more than ±5%, and short-term wave is not more than ±10%. Rated frequency is 50Hz.
- Q:I measured it with a CRO in the physics lab and I was wondering what could be its source
- That is a period of about 62 hours or 2.5 days! Are you sure you measured this with an oscilloscope, or does CRO mean something else to you? Maybe the motion of the planets, earth, moon, etc. I don't know? Do you mean a period of 4.5 microseconds? That would be 222kHz perhaps EMI from a computer, other electronic gear, short wave radio, etc. If you can clarify, I might be of more help. Edit: OK; I have a couple of ideas, but it can be DIFFICULT to find. I spent a long time trying to track down the source of 70MHz in my lab. Turns out there is a TV station (channel 4) transmitting about 1 mile away. Channel 4 occupies the space between 67.31MHz and 71.75MHz. 222 KHz has a wavelength of about 1350 meters. It takes a pretty big antenna to launch that as a traveling wave so I'm going guess its a near field source. A good way to look for it is to make a small loop antenna with a few turns of magnet wire (maybe a few 10s of cm in diameter) and hook it to your oscilloscope. Walk around with it putting it near any and all electrical equipment that is in or near your lab. Make sure to change the orientation of the coil when you are moving around. You are basically playing a game of hot and cold. Try to maximize the signal and in theory you should be near the source. Also, be suspicious of the lights. I know their source is 60Hz, but some electronic ballasts for fluorescents run at a pretty high frequency, at least 10's of KHz, you could be seeing a harmonic. Just try flipping the lights on and off looking for a change in amplitude of the signal on the scope. If this doesn't find it, then perhps it is far field? I don't know of any commercial braoadcasts at this frequency though. The low end of AM radio is around 500KHz. Maybe you have an active Ham radio operator in the neighborhood? I wouldn't think he would be transmitting all of the time though is this 'noise' always present? Hope this helps. Let me know if you find it. Dave
- Q:I need to cut a hole through 2(ish)cm of metal, or some sort of composite material I have at home to feed a few wires through. Is it possible to do it without any electrical equipment?
- A pneumatic drill
- Q:i just got into tech school for USAF as an aerospace ground equipment apprentice and was wandering if this is a good job? what kind of things can i expect to be doing everyday? is there a good chance i will get deployed to iraq? i would appreciate any advice anyone has. thanks
- It's a GOOD starting point for an apprentice space cadet! in 2 years you'll be a full pledged SPACE COWBOY! GOOD LUCK! the USAF needs MEN like you!
- Q:I bought some electrical equipment at a cheap price but it was due to a discount error.I placed the order and recieved the confirmation.Can they refuse to send my the products or change the price?Your help is much appriciated.
- Depends on what you mean by discount error If you used a promo code that is not supposed to be valid on the item you purchased, then NO, he does not have to honor your order just because the system accepted it. On the other hand, if he has the item listed incorrectly (ie, $10 instead of $100) than yes, he should have honor it. Make sure to look for anything on the website that says something along the lines of prices subject to change which could be used as a loophole. Either way though, he may not charge you more without your permission. In Califonia, if an item in a store is marked a certain price, it is actually illegal for the store to try to charge you more when you attempt to purchase the item. However, based on the fact that you may not even be in the same state as the store, things get a little murky. The best answer is simply to cross your fingers, as the internet is really a grey area. UPDATE: In follow-up, no they absolutely cannot demand that you send it back after you've receieved it. Nor can they try to charge you more afterwards. If it gets shipped, then it's yours to keep!
- Q:I hateTummy, supper, baggie, materials, equipment, fix used in making food, supplies, ointment
- Jade Goody Paris Hilton Amy Winehouse the last two because only an idiot would throw away their looks and talents and money and lifestyle to drugs.
- Q:I have a piece of electrical equipment that uses a 12v DC in that i want to replace with a battery, as it currently uses a wall charger with an AC converter. How would i go about doing this for cheap? making it myself wouldn't be out of the question, all i need is a guide. The 12v pack must also be as small as possible, as it is powering a portable device.
- I would find what signal would tell the amp to go into low power mode, and force that into the high power state. One possibility is the subwoofer amps are powered only by the AC charger, in which case you could re-wire their power so they get it from the built in battery. As for actual external power, you can use a couple appropriate RC packs, or a 12V SLA type battery.
- Q:and can they be prosecuted? (UK)
- Most electrical or electronic equipment is governed by a user honesty system where if the interfere with other equipment they are required to fix it. Especially if it is ham radio or CB radio. If it is a sewing machine or other home electrical item ring your communications dept. and they will take care of it. Sewing machines can be quite noisy as far as signals and interference go. As far as prosecution is concerned, that won't be up to you. The relevant dept will make that call based on what sort of equipment they are using. I think you should find out which dept. is in charge of radio signals and the like and talk to them. Good luck VK3FMPB
- Q:Also, Does the mean you can dispose of, or collect electronic 'waste' goods?
- The Waste Electrical and Electronic Equipment Directive is an EU wide directive, linked to ROHS compliance: rohs.eu Unless you are manufacturing electronic or electrical equipment, or importing it into the EU region, you do not need to register. Registration confirms that your product meets the required standard and does not relate to any recycling of this product, although all registered companies pay into a common fund to help cover the cost of recycling. The cost to the consumer of recycling should be zero, that is, you should not pay to have your electronics goods picked up for recycling.
- Q:For civilian populations as well as the military? Why is our government not doing enough to protect civilian populations in this country?
- military equipment is hardened against EMP. and if that fails we have backups. such as field phones (thats were i cringe) as for the civilan side of things, its not really worth it. one of the First known EMPs was created using Nuclear arms which you have other problems then your electronics being blown out. and with advances in weapons technology and the ability to create EMPs with out Nukes its to exspensive to try to harden everything. also the technology required as far as i know is pretty advanced it be hard to make without a industrailized economy as for the goverment not protecting us against EMPs thats up to the private industries who are suppling the electronics your using.
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Prefabricated Substation for Wind Power
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
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