Supply Hangzhou power transformer recycling 13735563862

  From the perspective of environmental protection, so that waste materials can be recycled
Facing various factories and enterprises in Zhejiang, the company has long purchased waste engineering machinery, waste electromechanical equipment, black-and-white non-ferrous metals, old aluminum alloy, nickel, titanium, waste electric control cabinet, electric welding machine, electric machine, stainless steel container, electroplating plant equipment, whole plant equipment, aluminum plant electrolytic cell, power plant equipment, plant scrap iron, waste boiler, construction machinery The enterprise produces surplus waste, refrigeration equipment, overstocked chemical equipment, site reinforcement, etc
, Zhejiang Shuhang material recycling Co
, Ltd
was established in 2004 with a registered capital of 2 million yuan
It is a renewable resource company approved by the industrial and commercial and environmental protection departments
The company's consistent service purpose is to treat every customer with a cooperative attitude based on high price, fair survival and reputation
Business scope: recycling of non productive waste machinery and materials (with valid certificate) It is understood that most of the recent quotations of traders have been maintained at a discount of about 200 yuan / ton
They said that the trading volume has not increased significantly, but the trading performance is slightly better than before
However, due to the copper price falling again this morning, the bullish atmosphere in the market is restricted again, and the current terminal consumption is not fully on hzydwzhs0511 the right track, so some cautious people still maintain a wait-and-see attitude
In addition, downstream demanders still favor low-cost sources, and the bargain hunting purchase volume of some users increased slightly at the weekend
In the morning, the spot copper discount shrank with the decline of price
The price difference between premium copper and flat copper expanded to more than 100 yuan, and the quotation of premium copper was mostly maintained between 150 yuan and 80 yuan / ton
In addition, it is reported that some large traders reported the highest premium of copper near the discount of 80 yuan / ton London Metal Exchange (LME) copper rose on Wednesday, with expectations of strong demand for the quarter helping copper recover lost ground, but caution about the Iranian nuclear agreement limited gains
After US President Donald Trump announced his withdrawal from the Iranian nuclear agreement, oil prices jumped to a three-and-a-half-year high, and the US dollar softened after hitting a new high this year
Analysts said copper futures rebounded to the middle of the trading range from March to April, supported by strong seasonal demand expectations, and inventories fell to the lowest in three and a half months
LME three-month copper closed up 1% at US $6810 per ton
The price of spot copper in Shanghai is 50840-51000 yuan 6 / ton, up 175 yuan / ton and flat water premium 100 yuan / ton
At the beginning of the morning market opening, the carrier wanted to support the price, and the market response was flat
The carrier quickly reduced the quotation and shipped
The discount of wet copper changed little today, and the downstream continued to make up the stock on bargain hunting, and the overall transaction was general (1) Sound in case of phase failure when the transformer is in phase failure, if the second phase is blocked, the second phase is still silent, and there is sound only when the third phase is sent; If the third phase is not connected, the sound will not change, which is the same as that of the second phase
There are three reasons for phase loss: , ① The power supply lacks one phase of power ② One phase of high voltage fuse of transformer is blown ③ Due to careless transportation of the transformer and the thin high-voltage lead, the vibration line is broken (but not connected to the shell) (2) The voltage regulating tap changer is not in place or has poor contact
When the transformer is put into operation, if the tap changer is not in place, a large & ldquo; Tweet & rdquo; The high-voltage fuse is blown when the noise is serious; If the tap changer is in poor contact, a slight & ldquo; Squeak & rdquo; Spark discharge sound, once the load increases, it may burn out the contact of the tap changer
In this case, the power shall be cut off and repaired in time (3) foreign matters fall in and the threading screw is loose
When the threading screw clamping the iron core of the transformer is loose, there are nut parts left on the iron core or small metal objects fall in the transformer, the transformer will send out & ldquo; Jingle & rdquo; Knocking sound or & ldquo; Call & hellip; Call & hellip& rdquo; The sound of blowing and & ldquo; Squeak, squeak & rdquo; It sounds like a magnet sucking a small gasket, while the voltage, current and temperature of the transformer are normal
This kind of situation generally does not affect the normal operation of the transformer, and can be handled in case of power failure (4) the high-voltage bushing of the transformer is dirty and cracked
When the high-voltage bushing of the transformer is dirty and the surface enamel falls off or cracks, the surface flashover will occur and & ldquo; Hiss & rdquo; Or & ldquo; Wheezing & rdquo; You can see sparks at night (5) when the grounding wire of the transformer core is broken, the grounding wire of the transformer core is broken; Beep peel beep Peel & rdquo; A slight discharge sound (6) Hear & ldquo; during internal discharge power transmission; Crackle crackle & rdquo; The crisp iron striking sound is the discharge sound of the conductive lead to the transformer shell through the air; If you hear a dull & ldquo; Crackle & rdquo; Sound is the discharge sound of the conductor facing the shell through the transformer oil
If the insulation distance is not enough, power off the lifting core for inspection, strengthen the insulation or add an insulating diaphragm (7) the external line is broken or short circuited
When the line is broken at the connection or T-connection of the conductor, it is broken when it is windy, and arc or spark occurs when it is in contact, the transformer will emit a frog like & ldquo; Whoa, whoa & rdquo; A cry; When the low-voltage line is grounded or short circuited, the transformer sends out & ldquo; Boom & rdquo; The sound of; If the short-circuit point is close, the transformer will roar like a tiger 1
Divided by phase number: 1) single phase transformer: used for single-phase load and three-phase transformer group
2) Three phase transformer: used for voltage rise and fall of three-phase system 2
According to the cooling method, it can be divided into: 1) dry type transformer: natural cooling by air convection or fan cooling
It is mostly used for power consumption of high-rise buildings, high-speed toll stations, local lighting, electronic circuits and other small capacity transformers
2) Oil immersed transformer: relying on oil as cooling medium, such as oil immersed self cooling, oil immersed air cooling, oil immersed water cooling, forced oil circulation, etc 3
By use: 1) power transformer: used for voltage rise and fall of transmission and distribution system
2) Instrument transformer: such as voltage transformer, current transformer, measuring instrument and relay protection device
3) Test transformer: it can generate high voltage and conduct high voltage test on electrical equipment
4) Special transformers: such as electric furnace transformer, rectifier transformer, adjustment transformer, capacitive transformer, phase-shifting transformer, etc 4
Divided by winding form: 1) double winding transformer: used to connect two voltage levels in the power system
2) Three winding transformer: it is generally used in regional substations of power system to connect three voltage levels
3) Autotransformer: used to connect power systems with different voltages
It can also be used as an ordinary step-up or step-down transformer 5
According to the form of iron core: 1) core transformer: used for high-voltage power transformer
2) Amorphous alloy transformer: amorphous alloy iron core transformer is a new type of magnetic conductive material, and the no-load current decreases by about 80%
It is a distribution transformer with ideal energy-saving effect
It is especially suitable for rural power grid, developing areas and other places with low load rate
3) Shell transformer: special transformer for high current, such as electric furnace transformer and welding transformer; Or power transformers for electronic instruments, televisions, radios, etc Power transformers are classified by purpose: step-up (power plant 6
3kv/10
5kv or 10
5kv/110kv, etc
), liaison (220kV / 110kV or 110kV / 10
5kv between substations), step-down (35kV / 0
4kV or 10
5kv/0
4kv for power distribution) Power transformers are classified according to the number of phases: single-phase and three-phase Power transformers are classified according to windings: double windings (each phase is installed on the same core, and the primary and secondary windings are wound separately and insulated from each other), three windings (each phase has three windings, and the primary and secondary windings are wound separately and insulated from each other), autotransformer (the middle tap of a set of windings is used as primary or secondary output)
Three winding transformer requires the capacity of the primary winding to be greater than or equal to the capacity of the secondary and tertiary windings
The percentage of three winding capacity is in the order of high voltage, medium voltage and low voltage: 100 / 100 / 100, 100 / 50 / 100 and 100 / 100 / 50
It is required that the secondary and tertiary windings cannot operate at full load
Generally, the voltage of the tertiary winding is low, which is mostly used for near area power supply or compensation equipment to connect three voltage levels
Autotransformer: there are two kinds of step-up or step-down transformers
Because of its small loss, light weight and economical use, it is widely used in EHV power grid
The commonly used model of small autotransformer is 400V / 36V (24V), which is used for power supply of safety lighting and other equipment Power transformers are classified by insulation medium: oil immersed transformer (flame retardant and non flame retardant), dry-type transformer and 110kvsf6 gas insulated transformer The cores of power transformers are of core structure The three-phase power transformer configured in general communication engineering is a double winding transformer Demolition scope: Hotel demolition project: Indoor structure includes (removing ceiling, cables and wires, ventilation system, compartment, floor, wall and ground) Outdoor structures include: Dismantle billboards, neon lights, aluminum alloy doors and windows, etc Construction site: Dismantle the movable room, power distribution room, construction waste, wires and cables, plumbing devices, steel pipe fasteners, door and window materials, etc Industrial equipment: Dismantle waste machine tools, refrigeration equipment, air conditioning system, production line, motor, cable and wire, etc Demolition of waste plant: The company has rich experience in plant demolition construction contracting and complete mechanical equipment
It can contract large - span plants with various structures Enterprise waste assets, plant sales, all kinds of inventory backlog, obsolete materials, etc