Top Ten Basic Knowledge Questions and Answers for Generator Sets
Building waterproofing application polyurea coating system
Polyurea Waterproof Coating is not a new technology. In fact, it has been in existence for nearly 30 years. Polyaspartic Waterproof Coating are used as waterproof and durability protection materials in many infrastructure projects due to their excellent performance characteristics. . Polyurea coatings are the most advanced material systems for waterproofing and protective coatings, but the technology is based on the reaction of isocyanate components with amine mixtures. The isocyanate can be an aromatic or ester family composition. The reaction is very fast and is completed in a few seconds. Therefore, specialized mixing and application equipment and professionals are required, and the cost is very expensive. This advanced material system is difficult to spread to various fields.
Based on this status quo, UMS has developed a set of simple, efficient and durable UMS-AUPT brushed polyurea waterproof protective material system based on polyurea coating for nearly five years, and has obtained many building waterproof projects at home and abroad. Actual inspection and application. The company from the resin to the coating, all independent technology development, and independent production.
The advantages of UMS-AUPT brushed polyurea waterproof protective material system
1. Can be brushed by hand, rolled, and airless if necessary. Construction is fast and flexible. It can be painted on any curved surface, inclined surface and vertical surface without sag.
2. No solvent, no VOC emission, environmental protection and energy saving; humidity and temperature have little effect on the construction process.
3. Advantageous physical and chemical properties, such as tensile strength, elongation, flexibility, wear resistance, aging resistance, corrosion resistance, etc.
4. High-strength coating, high elasticity and no seam are top-grade waterproof materials with excellent performance.
5. High adhesion and durability to various substrates such as steel, wood, glass, ceramics and concrete. Does not crack and does not fall off.
UMS-AUPT polyurea elastomer waterproof coating system is mainly in the following construction fields, with absolute technical advantages and comprehensive cost advantages.
1. Waterproof for Roof / bridge deck.
2. Waterproof For Pool /water park is sealed
3. Reservoir / Pond Waterproof Coating
1. What is the relationship between apparent power, active power, rated power, maximum power, and economic power?
Answer: 1) The unit of apparent power is KVA. China is used to express the capacity of transformers and UPS.
2) The active power is 0.8 times of the apparent power, and the unit is KW. China is used to power generation equipment and electrical equipment.
3) The rated power of a diesel generator is the power that can be continuously operated for 12 hours.
4) The maximum power is 1.1 times the rated power, but only 1 hour is allowed within 12 hours.
5) The economic power is 0.75 times of the rated power, which is the output power of the diesel generator set that can be operated for a long time without time limit. When this power is running, the fuel is the most economical and the failure rate is the lowest.
2. Why the diesel generator set is not allowed to run for a long time at a temperature lower than 50% of the rated power.
A: The oil consumption is increased, the diesel engine is prone to charcoal, the failure rate is increased, and the overhaul cycle is shortened.
3. What is the power factor of the three-phase generator? Can I add a power compensator to improve the power factor?
A: The power factor is 0.8. No, because the charging and discharging of the capacitor will cause fluctuations in the small power supply and oscillation of the unit.
4. Can the electronic or electrical components with a withstand voltage of 500V be used for diesel generator control cabinets?
A: No. Because the 400/230V voltage indicated on the diesel generator set is the effective voltage. Its peak voltage is 1.414 times the effective voltage. That is, the peak voltage of the diesel generator is Umax=566/325V
5. How is the optimal power (economic power) of the generator set calculated?
Answer: P best = 3/4*P rated (ie 0.75 times rated power)
6. Do all diesel generator sets have self-protection?
A: No. At present, there are some belts and some in the same brand of the same market. Customers must figure out when purchasing a unit. Write written materials as an attachment to the contract.
7. What is the national standard for the engine power of a typical generator set to be greater than the generator power?
A: 10%.
8. Some generators' engine power is expressed in horsepower. How is the horsepower and international unit kilowatts converted?
A: 1 horsepower = 0.735 kW, 1 kW = 1.36 hp.
9. How is the current of the three-phase generator calculated?
Answer: I = P / (√3 Ucos φ ) Current = Power (Watts) / (√3 * 400 (volts) * 0.8) . The simple formula is: I(A) = unit rated power (KW)* 1.8
10. Diesel generator sets are available in the form of open generator sets, anti-speaker generator sets, rain cover generator sets, mobile power stations, etc.
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